Geografic-Information-System/gui/wxpython/image2target/ii2t_manager.py

"""
@package gcp.manager

@brief Georectification module for GRASS GIS. Includes ground control
point management and interactive point and click GCP creation

Classes:
 - manager::GCPWizard
 - manager::LocationPage
 - manager::GroupPage
 - manager::DispMapPage
 - manager::GCP
 - manager::GCPList
 - manager::VectGroup
 - manager::EditGCP
 - manager::GrSettingsDialog

(C) 2006-2017 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Original author Michael Barton
@author Original version improved by Martin Landa <landa.martin gmail.com>
@author Rewritten by Markus Metz redesign georectfier -> GCP Manage
@author Support for GraphicsSet added by Stepan Turek <stepan.turek seznam.cz> (2012)
@author port i.image.2target (v6) to version 7 in 2017 by Yann 
"""

#TODO: i.ortho.transform has 6 appearances, check each of them and configure
#TODO: i.ortho.transform looks for REF_POINTS/CONTROL_POINTS and not POINTS 
#TODO: CHECK CONTROL_POINTS format and create it for i.ortho.transform to use.

from __future__ import print_function

import os
import sys
import six
import shutil
from copy import copy

import wx
from wx.lib.mixins.listctrl import ColumnSorterMixin, ListCtrlAutoWidthMixin
import wx.lib.colourselect as csel

from core import globalvar
if globalvar.wxPythonPhoenix:
    from wx import adv as wiz
    from wx.adv import Wizard
else:
    from wx import wizard as wiz
    from wx.wizard import Wizard

import grass.script as grass


from core import utils
from core.render import Map
from gui_core.gselect import Select, LocationSelect, MapsetSelect
from gui_core.dialogs import GroupDialog
from core.gcmd import RunCommand, GMessage, GError, GWarning
from core.settings import UserSettings
from gcp.mapdisplay import MapFrame
from core.giface import Notification
from gui_core.wrap import SpinCtrl, Button, StaticText, StaticBox, \
    CheckListBox, TextCtrl, Menu, ListCtrl, BitmapFromImage, CheckListCtrlMixin

from location_wizard.wizard import TitledPage as TitledPage

#
# global variables
#
global src_map
global tgt_map
global maptype

src_map = ''
tgt_map = {'raster': '',
           'vector': ''}
maptype = 'raster'


def getSmallUpArrowImage():
    stream = open(os.path.join(globalvar.IMGDIR, 'small_up_arrow.png'), 'rb')
    try:
        img = wx.Image(stream)
    finally:
        stream.close()
    return img


def getSmallDnArrowImage():
    stream = open(os.path.join(globalvar.IMGDIR, 'small_down_arrow.png'), 'rb')
    try:
        img = wx.Image(stream)
    finally:
        stream.close()
    stream.close()
    return img


class GCPWizard(object):
    """
    Start wizard here and finish wizard here
    """

    #def __init__(self, parent, giface, srcloc, srcmpt, srcgrp, srcras, tgtras, camera, order, extension):
    #    global maptype
    #    global src_map
    #    global tgt_map
    #    maptype = 'raster'
    #    rendertype = 'raster'
    #    self.parent = parent  # GMFrame
    #    self._giface = giface
    #    self.srcloc = srcloc
    #    self.srcmpt = srcmpt
    #    self.group = srcgrp
    #    self.src_map = srcras
    #    self.tgt_map = tgtras
    #    self.camera = camera
    #    self.order = int(order)
    #    self.extension = extension
    #    self.src_maps = self.src_map
    #    # location for xy map to georectify
    #    self.newlocation = self.srcloc 
    #    # mapset for xy map to georectify
    #    self.newmapset = self.srcmpt
    def __init__(self, parent, giface):
        self.parent = parent  # GMFrame
        self._giface = giface

        #
        # get environmental variables
        #
        self.grassdatabase = grass.gisenv()['GISDBASE']

        #
        # read original environment settings
        #
        self.target_gisrc = os.environ['GISRC']
        self.gisrc_dict = {}
        try:
            f = open(self.target_gisrc, 'r')
            for line in f.readlines():
                line = line.replace('\n', '').strip()
                if len(line) < 1:
                    continue
                key, value = line.split(':', 1)
                self.gisrc_dict[key.strip()] = value.strip()
        finally:
            f.close()

        self.currentlocation = self.gisrc_dict['LOCATION_NAME']
        self.currentmapset = self.gisrc_dict['MAPSET']
        # location for xy map to georectify
        self.newlocation = ''
        # mapset for xy map to georectify
        self.newmapset = ''

        global maptype
        global src_map
        global tgt_map

        #src_map = ''
        #tgt_map = ''
        maptype = 'raster'

        # GISRC file for source location/mapset of map(s) to georectify
        self.source_gisrc = ''
        self.src_maps = []

        # Raster map with camera angle relative to ground surface (i.ortho.rectify)
        self.cam_angle = ''

        #
        # define wizard pages
        #
        self.wizard = wiz.Wizard(
            parent=parent,
            id=wx.ID_ANY,
            title=_("Setup for georectification"))
        self.startpage = LocationPage(self.wizard, self)
        self.grouppage = GroupPage(self.wizard, self)
        self.mappage = DispMapPage(self.wizard, self)

        #
        # set the initial order of the pages
        #
        self.startpage.SetNext(self.grouppage)
        self.grouppage.SetPrev(self.startpage)
        self.grouppage.SetNext(self.mappage)
        self.mappage.SetPrev(self.grouppage)

        #
        # do pages layout
        #
        self.startpage.DoLayout()
        self.grouppage.DoLayout()
        self.mappage.DoLayout()
        self.wizard.FitToPage(self.startpage)

        # self.Bind(wx.EVT_CLOSE,    self.Cleanup)
        # self.parent.Bind(wx.EVT_ACTIVATE, self.OnGLMFocus)

        success = False

        #
        # run wizard
        #
        if self.wizard.RunWizard(self.startpage):
            success = self.OnWizFinished()
            if success == False:
                GMessage(parent=self.parent,
                         message=_("Georectifying setup canceled."))
                self.Cleanup()
        else:
            GMessage(parent=self.parent,
                     message=_("Georectifying setup canceled."))
            self.Cleanup()

        #
        # start GCP display
        #
        if success != False:
            # instance of render.Map to be associated with display
            self.SwitchEnv('source')
            self.SrcMap = Map(gisrc=self.source_gisrc)
            self.SwitchEnv('target')
            self.TgtMap = Map(gisrc=self.target_gisrc)
            self.Map = self.SrcMap

            #
            # add layer to source map
            #
            if maptype == 'raster':
                rendertype = 'raster'
                cmdlist = ['d.rast', 'map=%s' % src_map]
            else:  # -> vector layer
                rendertype = 'vector'
                cmdlist = ['d.vect', 'map=%s' % src_map]

            self.SwitchEnv('source')
            name, found = utils.GetLayerNameFromCmd(cmdlist)
            self.SrcMap.AddLayer(
                ltype=rendertype,
                command=cmdlist,
                active=True,
                name=name,
                hidden=False,
                opacity=1.0,
                render=False)

            self.SwitchEnv('target')
            if tgt_map['raster']:
                #
                # add raster layer to target map
                #
                rendertype = 'raster'
                cmdlist = ['d.rast', 'map=%s' % tgt_map['raster']]

                name, found = utils.GetLayerNameFromCmd(cmdlist)
                self.TgtMap.AddLayer(
                    ltype=rendertype,
                    command=cmdlist,
                    active=True,
                    name=name,
                    hidden=False,
                    opacity=1.0,
                    render=False)

            if tgt_map['vector']:
                #
                # add raster layer to target map
                #
                rendertype = 'vector'
                cmdlist = ['d.vect', 'map=%s' % tgt_map['vector']]

                name, found = utils.GetLayerNameFromCmd(cmdlist)
                self.TgtMap.AddLayer(
                    ltype=rendertype,
                    command=cmdlist,
                    active=True,
                    name=name,
                    hidden=False,
                    opacity=1.0,
                    render=False)

            #
            # start GCP Manager
            #
            self.gcpmgr = GCP(self.parent, giface=self._giface,
                              grwiz=self, size=globalvar.MAP_WINDOW_SIZE,
                              toolbars=["gcpdisp"],
                              Map=self.SrcMap, lmgr=self.parent)

            # load GCPs
            self.gcpmgr.InitMapDisplay()
            self.gcpmgr.CenterOnScreen()
            self.gcpmgr.Show()
            # need to update AUI here for wingrass
            self.gcpmgr._mgr.Update()
        else:
            self.Cleanup()

    def SetSrcEnv(self, location, mapset):
        """Create environment to use for location and mapset
        that are the source of the file(s) to georectify

        :param location: source location
        :param mapset: source mapset

        :return: False on error
        :return: True on success
        """

        self.newlocation = location
        self.newmapset = mapset

        # check to see if we are georectifying map in current working
        # location/mapset
        if self.newlocation == self.currentlocation and self.newmapset == self.currentmapset:
            return False

        self.gisrc_dict['LOCATION_NAME'] = location
        self.gisrc_dict['MAPSET'] = mapset

        self.source_gisrc = utils.GetTempfile()

        try:
            f = open(self.source_gisrc, mode='w')
            for line in self.gisrc_dict.items():
                f.write(line[0] + ": " + line[1] + "\n")
        finally:
            f.close()

        return True

    def SwitchEnv(self, grc):
        """
        Switches between original working location/mapset and
        location/mapset that is source of file(s) to georectify
        """
        # check to see if we are georectifying map in current working
        # location/mapset
        if self.newlocation == self.currentlocation and self.newmapset == self.currentmapset:
            return False

        if grc == 'target':
            os.environ['GISRC'] = str(self.target_gisrc)
        elif grc == 'source':
            os.environ['GISRC'] = str(self.source_gisrc)

        return True

    def OnWizFinished(self):
        # self.Cleanup()

        return True

    def OnGLMFocus(self, event):
        """Layer Manager focus"""
        # self.SwitchEnv('target')

        event.Skip()

    def Cleanup(self):
        """Return to current location and mapset"""
        # here was also the cleaning of gcpmanagement from layer manager
        # which is no longer needed

        self.SwitchEnv('target')
        self.wizard.Destroy()


class LocationPage(TitledPage):
    """
    Set map type (raster or vector) to georectify and
    select location/mapset of map(s) to georectify.
    """

    def __init__(self, wizard, parent):
        TitledPage.__init__(self, wizard, _(
            "Select map type and location/mapset"))

        self.parent = parent
        self.grassdatabase = self.parent.grassdatabase

        self.xylocation = ''
        self.xymapset = ''

        #
        # layout
        #
        # map type
        self.rb_maptype = wx.RadioBox(
            parent=self, id=wx.ID_ANY, label=' %s ' %
            _("Map type to georectify"), choices=[
                _('raster'), _('vector')], majorDimension=wx.RA_SPECIFY_COLS)
        self.sizer.Add(self.rb_maptype,
                       flag=wx.ALIGN_CENTER | wx.ALL | wx.EXPAND, border=5,
                       pos=(1, 1), span=(1, 2))

        # location
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select source location:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                1))
        self.cb_location = LocationSelect(
            parent=self, gisdbase=self.grassdatabase)
        self.sizer.Add(
            self.cb_location,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                2))

        # mapset
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select source mapset:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                3,
                1))
        self.cb_mapset = MapsetSelect(parent=self, gisdbase=self.grassdatabase,
                                      setItems=False)
        self.sizer.Add(self.cb_mapset, flag=wx.ALIGN_LEFT |
                       wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5, pos=(3, 2))
        self.sizer.AddGrowableCol(2)

        #
        # bindings
        #
        self.Bind(wx.EVT_RADIOBOX, self.OnMaptype, self.rb_maptype)
        self.Bind(wx.EVT_COMBOBOX, self.OnLocation, self.cb_location)
        self.cb_mapset.Bind(wx.EVT_TEXT, self.OnMapset)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGING, self.OnPageChanging)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGED, self.OnEnterPage)
        # self.Bind(wx.EVT_CLOSE, self.parent.Cleanup)

    def OnMaptype(self, event):
        """Change map type"""
        global maptype

        if event.GetInt() == 0:
            maptype = 'raster'
        else:
            maptype = 'vector'

    def OnLocation(self, event):
        """Sets source location for map(s) to georectify"""
        self.xylocation = event.GetString()

        # create a list of valid mapsets
        tmplist = os.listdir(os.path.join(self.grassdatabase, self.xylocation))
        self.mapsetList = []
        for item in tmplist:
            if os.path.isdir(os.path.join(self.grassdatabase, self.xylocation, item)) and \
                    os.path.exists(os.path.join(self.grassdatabase, self.xylocation, item, 'WIND')):
                if item != 'PERMANENT':
                    self.mapsetList.append(item)

        self.xymapset = 'PERMANENT'
        utils.ListSortLower(self.mapsetList)
        self.mapsetList.insert(0, 'PERMANENT')
        self.cb_mapset.SetItems(self.mapsetList)
        self.cb_mapset.SetStringSelection(self.xymapset)

        if not wx.FindWindowById(wx.ID_FORWARD).IsEnabled():
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)

    def OnMapset(self, event):
        """Sets source mapset for map(s) to georectify"""
        if self.xylocation == '':
            GMessage(_('You must select a valid location '
                       'before selecting a mapset'),
                     parent=self)
            return

        self.xymapset = event.GetString()

        if not wx.FindWindowById(wx.ID_FORWARD).IsEnabled():
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)

    def OnPageChanging(self, event=None):
        if event.GetDirection() and \
                (self.xylocation == '' or self.xymapset == ''):
            GMessage(_('You must select a valid location '
                       'and mapset in order to continue'),
                     parent=self)
            event.Veto()
            return

        self.parent.SetSrcEnv(self.xylocation, self.xymapset)

    def OnEnterPage(self, event=None):
        if self.xylocation == '' or self.xymapset == '':
            wx.FindWindowById(wx.ID_FORWARD).Enable(False)
        else:
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)


class GroupPage(TitledPage):
    """
    Set group to georectify. Create group if desired.
    """

    def __init__(self, wizard, parent):
        TitledPage.__init__(self, wizard, _(
            "Select image/map group to georectify"))

        self.parent = parent

        self.grassdatabase = self.parent.grassdatabase
        self.groupList = []

        self.xylocation = ''
        self.xymapset = ''
        self.xygroup = ''

        # default extension
        self.extension = '_georect' + str(os.getpid())

        #
        # layout
        #
        # group
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select group:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                1,
                1))
        self.cb_group = wx.ComboBox(parent=self, id=wx.ID_ANY,
                                    choices=self.groupList, size=(350, -1),
                                    style=wx.CB_DROPDOWN | wx.CB_READONLY)
        self.sizer.Add(self.cb_group, flag=wx.ALIGN_LEFT |
                       wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5, pos=(1, 2))

        # create group
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Create group if none exists')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                1))
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        self.btn_mkgroup = Button(
            parent=self,
            id=wx.ID_ANY,
            label=_("Create/edit group..."))
        self.btn_vgroup = Button(
            parent=self,
            id=wx.ID_ANY,
            label=_("Add vector map to group..."))
        btnSizer.Add(self.btn_mkgroup,
                     flag=wx.RIGHT, border=5)

        btnSizer.Add(self.btn_vgroup,
                     flag=wx.LEFT, border=5)

        self.sizer.Add(
            btnSizer,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                2))

        # extension
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Extension for output maps:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                3,
                1))
        self.ext_txt = TextCtrl(
            parent=self, id=wx.ID_ANY, value="", size=(
                350, -1))
        self.ext_txt.SetValue(self.extension)
        self.sizer.Add(self.ext_txt, flag=wx.ALIGN_LEFT |
                       wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5, pos=(3, 2))

        self.sizer.AddGrowableCol(2)
        #
        # bindings
        #
        self.Bind(wx.EVT_COMBOBOX, self.OnGroup, self.cb_group)
        self.Bind(wx.EVT_TEXT, self.OnExtension, self.ext_txt)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGING, self.OnPageChanging)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGED, self.OnEnterPage)
        self.Bind(wx.EVT_CLOSE, self.parent.Cleanup)

        # hide vector group button by default
        self.btn_vgroup.Hide()

    def OnGroup(self, event):
        self.xygroup = event.GetString()

    def OnMkGroup(self, event):
        """Create new group in source location/mapset"""
        dlg = GroupDialog(parent=self, defaultGroup=self.xygroup)
        dlg.DisableSubgroupEdit()
        dlg.ShowModal()
        gr, s = dlg.GetSelectedGroup()
        if gr in dlg.GetExistGroups():
            self.xygroup = gr
        else:
            gr = ''
        dlg.Destroy()

        self.OnEnterPage()
        self.Update()

    def OnVGroup(self, event):
        """Add vector maps to group"""
        dlg = VectGroup(parent=self,
                        id=wx.ID_ANY,
                        grassdb=self.grassdatabase,
                        location=self.xylocation,
                        mapset=self.xymapset,
                        group=self.xygroup)

        if dlg.ShowModal() != wx.ID_OK:
            return

        dlg.MakeVGroup()
        self.OnEnterPage()

    def OnExtension(self, event):
        self.extension = self.ext_txt.GetValue()

    def OnPageChanging(self, event=None):
        if event.GetDirection() and self.xygroup == '':
            GMessage(_('You must select a valid image/map '
                       'group in order to continue'),
                     parent=self)
            event.Veto()
            return

        if event.GetDirection() and self.extension == '':
            GMessage(_('You must enter an map name '
                       'extension in order to continue'),
                     parent=self)
            event.Veto()
            return

    def OnEnterPage(self, event=None):
        global maptype

        self.groupList = []

        self.xylocation = self.parent.gisrc_dict['LOCATION_NAME']
        self.xymapset = self.parent.gisrc_dict['MAPSET']

        # create a list of groups in selected mapset
        if os.path.isdir(os.path.join(self.grassdatabase,
                                      self.xylocation,
                                      self.xymapset,
                                      'group')):
            tmplist = os.listdir(os.path.join(self.grassdatabase,
                                              self.xylocation,
                                              self.xymapset,
                                              'group'))
            for item in tmplist:
                if os.path.isdir(os.path.join(self.grassdatabase,
                                              self.xylocation,
                                              self.xymapset,
                                              'group',
                                              item)):
                    self.groupList.append(item)

        if maptype == 'raster':
            self.btn_vgroup.Hide()
            self.Bind(wx.EVT_BUTTON, self.OnMkGroup, self.btn_mkgroup)

        elif maptype == 'vector':
            self.btn_vgroup.Show()
            self.Bind(wx.EVT_BUTTON, self.OnMkGroup, self.btn_mkgroup)
            self.Bind(wx.EVT_BUTTON, self.OnVGroup, self.btn_vgroup)

        utils.ListSortLower(self.groupList)
        self.cb_group.SetItems(self.groupList)

        if len(self.groupList) > 0:
            if self.xygroup and self.xygroup in self.groupList:
                self.cb_group.SetStringSelection(self.xygroup)
            else:
                self.cb_group.SetSelection(0)
                self.xygroup = self.groupList[0]

        if self.xygroup == '' or \
                self.extension == '':
            wx.FindWindowById(wx.ID_FORWARD).Enable(False)
        else:
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)

        # switch to source
        self.parent.SwitchEnv('source')


class DispMapPage(TitledPage):
    """
    Select ungeoreferenced map to display for interactively
    setting ground control points (GCPs).
    """

    def __init__(self, wizard, parent):
        TitledPage.__init__(
            self, wizard,
            _("Select maps to display for ground control point (GCP) creation"))

        self.parent = parent
        global maptype

        #
        # layout
        #
        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select source map to display:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                1,
                1))

        self.srcselection = Select(
            self,
            id=wx.ID_ANY,
            size=globalvar.DIALOG_GSELECT_SIZE,
            type=maptype,
            updateOnPopup=False)

        self.sizer.Add(
            self.srcselection,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                1,
                2))

        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select target raster map to display:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                1))

        self.tgtrastselection = Select(
            self, id=wx.ID_ANY, size=globalvar.DIALOG_GSELECT_SIZE,
            type='raster', updateOnPopup=False)

        self.sizer.Add(
            self.tgtrastselection,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                2,
                2))

        self.sizer.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select target vector map to display:')),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                3,
                1))

        self.tgtvectselection = Select(
            self, id=wx.ID_ANY, size=globalvar.DIALOG_GSELECT_SIZE,
            type='vector', updateOnPopup=False)

        self.sizer.Add(
            self.tgtvectselection,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5,
            pos=(
                3,
                2))

        #
        # bindings
        #
        self.srcselection.Bind(wx.EVT_TEXT, self.OnSrcSelection)
        self.tgtrastselection.Bind(wx.EVT_TEXT, self.OnTgtRastSelection)
        self.tgtvectselection.Bind(wx.EVT_TEXT, self.OnTgtVectSelection)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGING, self.OnPageChanging)
        self.Bind(wiz.EVT_WIZARD_PAGE_CHANGED, self.OnEnterPage)
        self.Bind(wx.EVT_CLOSE, self.parent.Cleanup)

    def OnSrcSelection(self, event):
        """Source map to display selected"""
        global src_map
        global maptype

        src_map = self.srcselection.GetValue()

        if src_map == '':
            wx.FindWindowById(wx.ID_FORWARD).Enable(False)
        else:
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)

        try:
            # set computational region to match selected map and zoom display
            # to region
            if maptype == 'raster':
                p = RunCommand('g.region', 'raster=src_map')
            elif maptype == 'vector':
                p = RunCommand('g.region', 'vector=src_map')

            if p.returncode == 0:
                print('returncode = ', str(p.returncode))
                self.parent.Map.region = self.parent.Map.GetRegion()
        except:
            pass

    def OnTgtRastSelection(self, event):
        """Source map to display selected"""
        global tgt_map

        tgt_map['raster'] = self.tgtrastselection.GetValue()

    def OnTgtVectSelection(self, event):
        """Source map to display selected"""
        global tgt_map

        tgt_map['vector'] = self.tgtvectselection.GetValue()

    def OnPageChanging(self, event=None):
        global src_map
        global tgt_map

        if event.GetDirection() and (src_map == ''):
            GMessage(_('You must select a source map '
                       'in order to continue'),
                     parent=self)
            event.Veto()
            return

        self.parent.SwitchEnv('target')

    def OnEnterPage(self, event=None):
        global maptype
        global src_map
        global tgt_map

        self.srcselection.SetElementList(maptype)

        if maptype == 'raster':
            ret = RunCommand('i.group',
                             parent=self,
                             read=True,
                             group=self.parent.grouppage.xygroup,
                             flags='g')

            if ret:
                self.parent.src_maps = ret.splitlines()
            else:
                GError(
                    parent=self, message=_(
                        'No maps in selected group <%s>.\n'
                        'Please edit group or select another group.') %
                    self.parent.grouppage.xygroup)
                return

        elif maptype == 'vector':
            grassdatabase = self.parent.grassdatabase
            xylocation = self.parent.gisrc_dict['LOCATION_NAME']
            xymapset = self.parent.gisrc_dict['MAPSET']
            # make list of vectors to georectify from VREF

            vgrpfile = os.path.join(grassdatabase,
                                    xylocation,
                                    xymapset,
                                    'group',
                                    self.parent.grouppage.xygroup,
                                    'VREF')

            f = open(vgrpfile)
            try:
                for vect in f.readlines():
                    vect = vect.strip('\n')
                    if len(vect) < 1:
                        continue
                    self.parent.src_maps.append(vect)
            finally:
                f.close()

            if len(self.parent.src_maps) < 1:
                GError(
                    parent=self, message=_(
                        'No maps in selected group <%s>.\n'
                        'Please edit group or select another group.') %
                    self.parent.grouppage.xygroup)
                return

        # filter out all maps not in group
        self.srcselection.tcp.GetElementList(elements=self.parent.src_maps)
        src_map = self.parent.src_maps[0]
        self.srcselection.SetValue(src_map)

        self.parent.SwitchEnv('target')
        self.tgtrastselection.SetElementList('raster')
        self.tgtrastselection.GetElementList()
        self.tgtvectselection.SetElementList('vector')
        self.tgtvectselection.GetElementList()
        self.parent.SwitchEnv('source')

        if src_map == '':
            wx.FindWindowById(wx.ID_FORWARD).Enable(False)
        else:
            wx.FindWindowById(wx.ID_FORWARD).Enable(True)


class GCP(MapFrame, ColumnSorterMixin):
    """
    Manages ground control points for georectifying. Calculates RMS statistics.
    Calls i.ortho.rectify or v.rectify to georectify map.
    """

    def __init__(self, parent, giface, grwiz=None, id=wx.ID_ANY,
                 title=_("Manage Ground Control Points"),
                 size=(700, 300), toolbars=["gcpdisp"], Map=None, lmgr=None):

        self.grwiz = grwiz  # GR Wizard
        self._giface = giface

        if tgt_map['raster'] == '' and tgt_map['vector'] == '':
            self.show_target = False
        else:
            self.show_target = True

        #wx.Frame.__init__(self, parent, id, title, size = size, name = "GCPFrame")
        MapFrame.__init__(
            self,
            parent=parent,
            giface=self._giface,
            title=title,
            size=size,
            Map=Map,
            toolbars=toolbars,
            name='GCPMapWindow')

        # init variables
        self.parent = parent

        #
        # register data structures for drawing GCP's
        #
        self.pointsToDrawTgt = self.TgtMapWindow.RegisterGraphicsToDraw(
            graphicsType="point", setStatusFunc=self.SetGCPSatus)
        self.pointsToDrawSrc = self.SrcMapWindow.RegisterGraphicsToDraw(
            graphicsType="point", setStatusFunc=self.SetGCPSatus)

        # connect to the map windows signals
        # used to add or edit GCP
        self.SrcMapWindow.mouseLeftUpPointer.connect(
            lambda x, y:
            self._onMouseLeftUpPointer(self.SrcMapWindow, x, y))
        self.TgtMapWindow.mouseLeftUpPointer.connect(
            lambda x, y:
            self._onMouseLeftUpPointer(self.TgtMapWindow, x, y))

        # window resized
        self.resize = False

        self.grassdatabase = self.grwiz.grassdatabase

        self.currentlocation = self.grwiz.currentlocation
        self.currentmapset = self.grwiz.currentmapset

        self.newlocation = self.grwiz.newlocation
        self.newmapset = self.grwiz.newmapset

        self.xylocation = self.grwiz.gisrc_dict['LOCATION_NAME']
        self.xymapset = self.grwiz.gisrc_dict['MAPSET']
        self.xygroup = self.grwiz.grouppage.xygroup
        self.src_maps = self.grwiz.src_maps
        self.extension = self.grwiz.grouppage.extension
        self.outname = ''
        self.VectGRList = []

        self.file = {
            'control_points': os.path.join(self.grassdatabase,
                                   self.xylocation,
                                   self.xymapset,
                                   'group',
                                   self.xygroup,
                                   'CONTROL_POINTS'),
            'control_points_bak': os.path.join(self.grassdatabase,
                                       self.xylocation,
                                       self.xymapset,
                                       'group',
                                       self.xygroup,
                                       'CONTROL_POINTS_BAK'),
            'rgrp': os.path.join(self.grassdatabase,
                                 self.xylocation,
                                 self.xymapset,
                                 'group',
                                 self.xygroup,
                                 'REF'),
            'vgrp': os.path.join(self.grassdatabase,
                                 self.xylocation,
                                 self.xymapset,
                                 'group',
                                 self.xygroup,
                                 'VREF'),
            'target': os.path.join(self.grassdatabase,
                                   self.xylocation,
                                   self.xymapset,
                                   'group',
                                   self.xygroup,
                                   'TARGET'),
            'elevation': os.path.join(self.grassdatabase,
                                   self.xylocation,
                                   self.xymapset,
                                   'group',
                                   self.xygroup,
                                   'ELEVATION'),
        }

        # make a backup of the current points file
        if os.path.exists(self.file['control_points']):
            shutil.copy(self.file['control_points'], self.file['control_points_bak'])

        # polynomial order transformation for georectification
        self.gr_order = 1
        # interpolation method for georectification
        self.gr_method = 'nearest'
        # region clipping for georectified map
        self.clip_to_region = False
        # number of GCPs selected to be used for georectification (checked)
        self.GCPcount = 0
        # forward RMS error
        self.fwd_rmserror = 0.0
        # backward RMS error
        self.bkw_rmserror = 0.0
        # list map coords and ID of map display they came from
        self.mapcoordlist = []
        self.mapcoordlist.append([0,        # GCP number
                                  0.0,      # source east
                                  0.0,      # source north
                                  0.0,      # source height
                                  0.0,      # target east
                                  0.0,      # target north
                                  0.0,      # target height
                                  0.0,      # forward error
                                  0.0])   # backward error

        # init vars to highlight high RMS errors
        self.highest_only = True
        self.show_unused = True
        self.highest_key = -1
        self.rmsthresh = 0
        self.rmsmean = 0
        self.rmssd = 0

        self.SetTarget(self.xygroup, self.currentlocation, self.currentmapset)

        self.itemDataMap = None

        # images for column sorting
        # CheckListCtrlMixin must set an ImageList first
        self.il = self.list.GetImageList(wx.IMAGE_LIST_SMALL)

        SmallUpArrow = BitmapFromImage(getSmallUpArrowImage())
        SmallDnArrow = BitmapFromImage(getSmallDnArrowImage())
        self.sm_dn = self.il.Add(SmallDnArrow)
        self.sm_up = self.il.Add(SmallUpArrow)

        # set mouse characteristics
        self.mapwin = self.SrcMapWindow
        self.mapwin.mouse['box'] = 'point'
        self.mapwin.mouse["use"] == "pointer"
        self.mapwin.zoomtype = 0
        self.mapwin.pen = wx.Pen(colour='black', width=2, style=wx.SOLID)
        self.mapwin.SetNamedCursor('cross')

        self.mapwin = self.TgtMapWindow

        # set mouse characteristics
        self.mapwin.mouse['box'] = 'point'
        self.mapwin.mouse["use"] == "pointer"
        self.mapwin.zoomtype = 0
        self.mapwin.pen = wx.Pen(colour='black', width=2, style=wx.SOLID)
        self.mapwin.SetNamedCursor('cross')

        #
        # show new display & draw map
        #
        if self.show_target:
            self.MapWindow = self.TgtMapWindow
            self.Map = self.TgtMap
            self.OnZoomToMap(None)

        self.MapWindow = self.SrcMapWindow
        self.Map = self.SrcMap
        self.OnZoomToMap(None)

        #
        # bindings
        #
        self.Bind(wx.EVT_ACTIVATE, self.OnFocus)
        self.Bind(wx.EVT_SIZE, self.OnSize)
        self.Bind(wx.EVT_IDLE, self.OnIdle)
        self.Bind(wx.EVT_CLOSE, self.OnQuit)

        self.SetSettings()

    def __del__(self):
        """Disable GCP manager mode"""
        # leaving the method here but was used only to delete gcpmanagement
        # from layer manager which is now not needed
        pass

    def CreateGCPList(self):
        """Create GCP List Control"""

        return GCPList(parent=self, gcp=self)

    # Used by the ColumnSorterMixin, see wx/lib/mixins/listctrl.py
    def GetListCtrl(self):
        return self.list

    def GetMapCoordList(self):
        return self.mapcoordlist

    # Used by the ColumnSorterMixin, see wx/lib/mixins/listctrl.py
    def GetSortImages(self):
        return (self.sm_dn, self.sm_up)

    def GetFwdError(self):
        return self.fwd_rmserror

    def GetBkwError(self):
        return self.bkw_rmserror

    def InitMapDisplay(self):
        self.list.LoadData()

        # initialize column sorter
        self.itemDataMap = self.mapcoordlist
        ncols = self.list.GetColumnCount()
        ColumnSorterMixin.__init__(self, ncols)
        # init to ascending sort on first click
        self._colSortFlag = [1] * ncols

    def SetTarget(self, tgroup, tlocation, tmapset):
        """
        Sets rectification target to current location and mapset
        """
        # check to see if we are georectifying map in current working
        # location/mapset
        if self.newlocation == self.currentlocation and self.newmapset == self.currentmapset:
            RunCommand('i.target',
                       parent=self,
                       flags='c',
                       group=tgroup)
        else:
            self.grwiz.SwitchEnv('source')
            RunCommand('i.target',
                       parent=self,
                       group=tgroup,
                       location=tlocation,
                       mapset=tmapset)
            self.grwiz.SwitchEnv('target')

    def AddGCP(self, event):
        """
        Appends an item to GCP list
        """
        keyval = self.list.AddGCPItem() + 1
        # source east, source north, target east, target north, forward error,
        # backward error
        self.mapcoordlist.append([keyval,             # GCP number
                                  0.0,                # source east
                                  0.0,                # source north
                                  0.0,                # source height
                                  0.0,                # target east
                                  0.0,                # target north
                                  0.0,                # target height
                                  0.0,                # forward error
                                  0.0])             # backward error

        if self.statusbarManager.GetMode() == 8:  # go to
            self.StatusbarUpdate()

    def DeleteGCP(self, event):
        """
        Deletes selected item in GCP list
        """
        minNumOfItems = self.OnGROrder(None)

        if self.list.GetItemCount() <= minNumOfItems:
            GMessage(
                parent=self,
                message=_("At least %d GCPs required. Operation canceled.") %
                minNumOfItems)
            return

        key = self.list.DeleteGCPItem()
        del self.mapcoordlist[key]

        # update key and GCP number
        for newkey in range(key, len(self.mapcoordlist)):
            index = self.list.FindItem(-1, newkey + 1)
            self.mapcoordlist[newkey][0] = newkey
            self.list.SetItem(index, 0, str(newkey))
            self.list.SetItemData(index, newkey)

        # update selected
        if self.list.GetItemCount() > 0:
            if self.list.selected < self.list.GetItemCount():
                self.list.selectedkey = self.list.GetItemData(
                    self.list.selected)
            else:
                self.list.selected = self.list.GetItemCount() - 1
                self.list.selectedkey = self.list.GetItemData(
                    self.list.selected)

            self.list.SetItemState(self.list.selected,
                                   wx.LIST_STATE_SELECTED,
                                   wx.LIST_STATE_SELECTED)
        else:
            self.list.selected = wx.NOT_FOUND
            self.list.selectedkey = -1

        self.UpdateColours()

        if self.statusbarManager.GetMode() == 8:  # go to
            self.StatusbarUpdate()
            if self.list.selectedkey > 0:
                self.statusbarManager.SetProperty(
                    'gotoGCP', self.list.selectedkey)

    def ClearGCP(self, event):
        """
        Clears all values in selected item of GCP list and unchecks it
        """
        index = self.list.GetSelected()
        key = self.list.GetItemData(index)
        for i in range(1, 7):
            self.list.SetItem(index, i, '0.0')
        self.list.SetItem(index, 7, '')
        self.list.SetItem(index, 8, '')
        self.list.CheckItem(index, False)

        # GCP number, source E, source N, target E, target N, fwd error, bkwd
        # error
        self.mapcoordlist[key] = [key, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]

    def SetSettings(self):
        """Sets settings for drawing of GCP's.
        """
        self.highest_only = UserSettings.Get(
            group='gcpman', key='rms', subkey='highestonly')
        self.show_unused = UserSettings.Get(
            group='gcpman', key='symbol', subkey='unused')

        colours = {"color": "default",
                   "hcolor": "highest",
                   "scolor": "selected",
                   "ucolor": "unused"}
        wpx = UserSettings.Get(group='gcpman', key='symbol', subkey='width')

        for k, v in six.iteritems(colours):
            col = UserSettings.Get(group='gcpman', key='symbol', subkey=k)
            self.pointsToDrawSrc.GetPen(v).SetColour(wx.Colour(
                col[0], col[1], col[2], 255))  # TODO GetPen neni to spatne?
            self.pointsToDrawTgt.GetPen(v).SetColour(
                wx.Colour(col[0], col[1], col[2], 255))

            self.pointsToDrawSrc.GetPen(v).SetWidth(wpx)
            self.pointsToDrawTgt.GetPen(v).SetWidth(wpx)

        spx = UserSettings.Get(group='gcpman', key='symbol', subkey='size')
        self.pointsToDrawSrc.SetPropertyVal("size", int(spx))
        self.pointsToDrawTgt.SetPropertyVal("size", int(spx))

        font = self.GetFont()
        font.SetPointSize(int(spx) + 2)

        textProp = {}
        textProp['active'] = True
        textProp['font'] = font
        self.pointsToDrawSrc.SetPropertyVal("text", textProp)
        self.pointsToDrawTgt.SetPropertyVal("text", copy(textProp))

    def SetGCPSatus(self, item, itemIndex):
        """Before GCP is drawn, decides it's colour and whether it
        will be drawed.
        """
        key = self.list.GetItemData(itemIndex)
        # incremented because of itemDataMap (has one more item) - will be
        # changed
        itemIndex += 1

        if not self.list.IsItemChecked(key - 1):
            wxPen = "unused"
            if not self.show_unused:
                item.SetPropertyVal('hide', True)
            else:
                item.SetPropertyVal('hide', False)

        else:
            item.SetPropertyVal('hide', False)
            if self.highest_only == True:
                if itemIndex == self.highest_key:
                    wxPen = "highest"
                else:
                    wxPen = "default"
            else:
                if (self.mapcoordlist[key][7] > self.rmsthresh):
                    wxPen = "highest"
                else:
                    wxPen = "default"

        if itemIndex == self.list.selectedkey:
            wxPen = "selected"

        item.SetPropertyVal('label', str(itemIndex))
        item.SetPropertyVal('penName', wxPen)

    def SetGCPData(self, coordtype, coord, mapdisp=None, confirm=False):
        """Inserts coordinates from file, mouse click on map, or
        after editing into selected item of GCP list and checks it for
        use.
        """
        index = self.list.GetSelected()
        if index == wx.NOT_FOUND:
            return

        coord0 = coord[0]
        coord1 = coord[1]

        key = self.list.GetItemData(index)
        if confirm:
            if self.MapWindow == self.SrcMapWindow:
                currloc = _("source")
            else:
                currloc = _("target")
            ret = wx.MessageBox(
                parent=self, caption=_("Set GCP coordinates"),
                message=_(
                    'Set %(coor)s coordinates for GCP No. %(key)s? \n\n'
                    'East: %(coor0)s \n'
                    'North: %(coor1)s') %
                {'coor': currloc, 'key': str(key),
                 'coor0': str(coord0),
                 'coor1': str(coord1)},
                style=wx.ICON_QUESTION | wx.YES_NO | wx.CENTRE)

            # for wingrass
            if os.name == 'nt':
                self.MapWindow.SetFocus()
            if ret == wx.NO:
                return

        if coordtype == 'source':
            self.list.SetItem(index, 1, str(coord0))
            self.list.SetItem(index, 2, str(coord1))
            self.mapcoordlist[key][1] = coord[0]
            self.mapcoordlist[key][2] = coord[1]
            self.pointsToDrawSrc.GetItem(key - 1).SetCoords([coord0, coord1])

        elif coordtype == 'target':
            self.list.SetItem(index, 4, str(coord0))
            self.list.SetItem(index, 5, str(coord1))
            self.mapcoordlist[key][4] = coord[0]
            self.mapcoordlist[key][5] = coord[1]
            #ADD ELEVATION FROM MAP AS HEIGHT PARAMETER
            if os.path.exists(self.file['elevation']):
                #Parse the i.ortho.elev generated file
                #Get all lines from file
                lines = open(self.file['elevation']).read().splitlines()
                #Remove empty spaces in lines
                lines = [x.replace(' ','') for x in lines]
                #Extract map@mapset
                elevationmap=lines[0].split(':')[1]+'@'+lines[1].split(':')[1]
                #Make sure the region is set to the elevation map
                ret, msg = RunCommand('g.region',
                                  parent=self,
                                  getErrorMsg=True,
                                  quiet=True,
                                  raster=elevationmap,
                                  flags=None)
                #Get the elevation height from the map given by i.ortho.elev
                from subprocess import PIPE
                from grass.pygrass.modules import Module
                rwhat = Module('r.what',
                                  map=elevationmap,
                                  coordinates=[coord[0],coord[1]],
                                  stdout_=PIPE)
                self.mapcoordlist[key][6] = rwhat.outputs.stdout.split('|')[3].rstrip('\n')
                self.list.SetItem(index, 6, str(self.mapcoordlist[key][6]))

            self.pointsToDrawTgt.GetItem(key - 1).SetCoords([coord0, coord1])

        self.list.SetItem(index, 7, '0')
        self.list.SetItem(index, 8, '0')
        self.mapcoordlist[key][7] = 0.0
        self.mapcoordlist[key][8] = 0.0

        # self.list.ResizeColumns()

    def SaveGCPs(self, event):
        """Make a CONTROL_POINTS file or save GCP coordinates to existing
        POINTS file
        """
        self.GCPcount = 0
        try:
            f = open(self.file['control_points'], mode='w')
            # use os.linesep or '\n' here ???
            f.write('# Ground Control Points File\n')
            f.write("# \n")
            f.write("# target location: " + self.currentlocation + '\n')
            f.write("# target mapset: " + self.currentmapset + '\n')
            f.write("#\tsource\t\t\ttarget\t\t\tstatus\n")
            f.write("#\teast\tnorth\theight\teast\tnorth\theight\t(1=ok, 0=ignore)\n")
            f.write(
                "#----------------------------     ---------------------------     ---------------\n")

            for index in range(self.list.GetItemCount()):
                if self.list.IsItemChecked(index):
                    check = "1"
                    self.GCPcount += 1
                else:
                    check = "0"
                coord0 = self.list.GetItem(index, 1).GetText()
                coord1 = self.list.GetItem(index, 2).GetText()
                coord2 = self.list.GetItem(index, 3).GetText()
                coord3 = self.list.GetItem(index, 4).GetText()
                coord4 = self.list.GetItem(index, 5).GetText()
                coord5 = self.list.GetItem(index, 6).GetText()
                f.write(
                    coord0 +
                    ' ' +
                    coord1 +
                    '     ' +
                    coord2 +
                    ' ' +
                    coord3 +
                    '     ' +
                    coord4 +
                    '     ' +
                    coord5 +
                    '     ' +
                    check +
                    '\n')

        except IOError as err:
            GError(
                parent=self,
                message="%s <%s>. %s%s" %
                (_("Writing CONTROL_POINTS file failed"),
                 self.file['control_points'],
                    os.linesep,
                    err))
            return

        f.close()

        # if event != None save also to backup file
        if event:
            shutil.copy(self.file['control_points'], self.file['control_points_bak'])
            self._giface.WriteLog(
                _('CONTROL_POINTS file saved for group <%s>') %
                self.xygroup)
            #self.SetStatusText(_('POINTS file saved'))

    def ReadGCPs(self):
        """
        Reads GCPs and georectified coordinates from POINTS file
        """

        self.GCPcount = 0

        sourceMapWin = self.SrcMapWindow
        targetMapWin = self.TgtMapWindow

        if not sourceMapWin:
            GError(parent=self,
                   message="%s. %s%s" % (_("source mapwin not defined"),
                                         os.linesep, err))

        if not targetMapWin:
            GError(parent=self,
                   message="%s. %s%s" % (_("target mapwin not defined"),
                                         os.linesep, err))

        try:
            f = open(self.file['control_points'], 'r')
            GCPcnt = 0

            for line in f.readlines():
                if line[0] == '#' or line == '':
                    continue
                line = line.replace('\n', '').strip()
                coords = list(map(float, line.split()))
                if coords[6] == 1:
                    check = True
                    self.GCPcount += 1
                else:
                    check = False

                self.AddGCP(event=None)
                self.SetGCPData('source', (coords[0], coords[1]), sourceMapWin)
                self.SetGCPData('target', (coords[3], coords[4]), targetMapWin)
                index = self.list.GetSelected()
                if index != wx.NOT_FOUND:
                    self.list.CheckItem(index, check)
                GCPcnt += 1

        except IOError as err:
            GError(
                parent=self,
                message="%s <%s>. %s%s" %
                (_("Reading CONTROL_POINTS file failed"),
                 self.file['control_points'],
                    os.linesep,
                    err))
            return

        f.close()

        if GCPcnt == 0:
            # 3 gcp is minimum
            for i in range(3):
                self.AddGCP(None)

        if self.CheckGCPcount():
            # calculate RMS
            self.RMSError(self.xygroup, self.gr_order)

    def ReloadGCPs(self, event):
        """Reload data from file"""

        # use backup
        shutil.copy(self.file['control_points_bak'], self.file['control_points'])

        # delete all items in mapcoordlist
        self.mapcoordlist = []
        self.mapcoordlist.append([0,        # GCP number
                                  0.0,      # source east
                                  0.0,      # source north
                                  0.0,      # source height
                                  0.0,      # target east
                                  0.0,      # target north
                                  0.0,      # target height
                                  0.0,      # forward error
                                  0.0])   # backward error

        self.list.LoadData()
        self.itemDataMap = self.mapcoordlist

        if self._col != -1:
            self.list.ClearColumnImage(self._col)
        self._colSortFlag = [1] * self.list.GetColumnCount()

        # draw GCPs (source and target)
        sourceMapWin = self.SrcMapWindow
        sourceMapWin.UpdateMap(render=False, renderVector=False)
        if self.show_target:
            targetMapWin = self.TgtMapWindow
            targetMapWin.UpdateMap(render=False, renderVector=False)

    def OnFocus(self, event):
        # TODO: it is here just to remove old or obsolate beavior of base class gcp/MapFrame?
        # self.grwiz.SwitchEnv('source')
        pass

    def _onMouseLeftUpPointer(self, mapWindow, x, y):
        if mapWindow == self.SrcMapWindow:
            coordtype = 'source'
        else:
            coordtype = 'target'

        coord = (x, y)
        self.SetGCPData(coordtype, coord, self, confirm=True)
        mapWindow.UpdateMap(render=False, renderVector=False)

    def OnRMS(self, event):
        """
        RMS button handler
        """
        self.RMSError(self.xygroup, self.gr_order)

        sourceMapWin = self.SrcMapWindow
        sourceMapWin.UpdateMap(render=False, renderVector=False)
        if self.show_target:
            targetMapWin = self.TgtMapWindow
            targetMapWin.UpdateMap(render=False, renderVector=False)

    def CheckGCPcount(self, msg=False):
        """
        Checks to make sure that the minimum number of GCPs have been defined and
        are active for the selected transformation order
        """
        if (self.GCPcount < 3 and self.gr_order == 1) or \
                (self.GCPcount < 6 and self.gr_order == 2) or \
                (self.GCPcount < 10 and self.gr_order == 3):
            if msg:
                GWarning(
                    parent=self, message=_(
                        'Insufficient points defined and active (checked) '
                        'for selected rectification method (order: %d).\n'
                        '3+ points needed for 1st order,\n'
                        '6+ points for 2nd order, and\n'
                        '10+ points for 3rd order.') %
                    self.gr_order)
                return False
        else:
            return True

    def OnGeorect(self, event):
        """
        Georectifies map(s) in group using i.ortho.rectify or v.rectify
        """
        global maptype
        self.SaveGCPs(None)

        if self.CheckGCPcount(msg=True) == False:
            return

        if maptype == 'raster':
            self.grwiz.SwitchEnv('source')

            if self.clip_to_region:
                flags = "ac"
            else:
                flags = "a"

            busy = wx.BusyInfo(_("Rectifying images, please wait..."),
                               parent=self)
            wx.GetApp().Yield()

            ret, msg = RunCommand('i.ortho.rectify',
                                  parent=self,
                                  getErrorMsg=True,
                                  quiet=True,
                                  group=self.xygroup,
                                  extension=self.extension,
                                  method=self.gr_method,
                                  angle=self.grwiz.cam_angle,
                                  flags=flags)

            del busy

            # provide feedback on failure
            if ret != 0:
                print(msg, file=sys.stderr)

        elif maptype == 'vector':
            # loop through all vectors in VREF

            self.grwiz.SwitchEnv('source')

            # make list of vectors to georectify from VREF
            f = open(self.file['vgrp'])
            vectlist = []
            try:
                for vect in f.readlines():
                    vect = vect.strip('\n')
                    if len(vect) < 1:
                        continue
                    vectlist.append(vect)
            finally:
                f.close()

            # georectify each vector in VREF using v.rectify
            for vect in vectlist:
                self.outname = str(vect.split('@')[0]) + self.extension
                self._giface.WriteLog(text=_('Transforming <%s>...') % vect,
                                      notification=Notification.MAKE_VISIBLE)
                ret = msg = ''

                busy = wx.BusyInfo(
                    _("Rectifying vector map <%s>, please wait...") %
                    vect, parent=self)
                wx.GetApp().Yield()

                ret, msg = RunCommand('v.rectify',
                                      parent=self,
                                      getErrorMsg=True,
                                      quiet=True,
                                      input=vect,
                                      output=self.outname,
                                      group=self.xygroup,
                                      order=self.gr_order)

                del busy

                # provide feedback on failure
                if ret != 0:
                    print(msg, file=sys.stderr)

        self.grwiz.SwitchEnv('target')

    def OnGeorectDone(self, **kargs):
        """Print final message"""
        global maptype
        if maptype == 'raster':
            return

        returncode = kargs['returncode']

        if returncode == 0:
            self.VectGRList.append(self.outname)
            print('*****vector list = ' + str(self.VectGRList),
                  file=sys.stderr)
        else:
            self._giface.WriteError(
                _('Georectification of vector map <%s> failed') %
                self.outname)

    def OnSettings(self, event):
        """GCP Manager settings"""
        dlg = GrSettingsDialog(parent=self, giface=self._giface,
                               id=wx.ID_ANY, title=_('GCP Manager settings'))

        if dlg.ShowModal() == wx.ID_OK:
            pass

        dlg.Destroy()

    def UpdateColours(self, srcrender=False, srcrenderVector=False,
                      tgtrender=False, tgtrenderVector=False):
        """update colours"""
        highest_fwd_err = 0.0
        self.highest_key = 0
        highest_idx = 0

        for index in range(self.list.GetItemCount()):
            if self.list.IsItemChecked(index):
                key = self.list.GetItemData(index)
                fwd_err = self.mapcoordlist[key][5]

                if self.highest_only == True:
                    self.list.SetItemTextColour(index, wx.BLACK)
                    if highest_fwd_err < fwd_err:
                        highest_fwd_err = fwd_err
                        self.highest_key = key
                        highest_idx = index
                elif self.rmsthresh > 0:
                    if (fwd_err > self.rmsthresh):
                        self.list.SetItemTextColour(index, wx.RED)
                    else:
                        self.list.SetItemTextColour(index, wx.BLACK)
            else:
                self.list.SetItemTextColour(index, wx.BLACK)

        if self.highest_only and highest_fwd_err > 0.0:
            self.list.SetItemTextColour(highest_idx, wx.RED)

        sourceMapWin = self.SrcMapWindow
        sourceMapWin.UpdateMap(render=srcrender, renderVector=srcrenderVector)
        if self.show_target:
            targetMapWin = self.TgtMapWindow
            targetMapWin.UpdateMap(
                render=tgtrender,
                renderVector=tgtrenderVector)

    def OnQuit(self, event):
        """Quit georectifier"""
        ret = wx.MessageBox(
            parent=self, caption=_("Quit GCP Manager"),
            message=_('Save ground control points?'),
            style=wx.ICON_QUESTION | wx.YES_NO | wx.CANCEL | wx.CENTRE)

        if ret != wx.CANCEL:
            if ret == wx.YES:
                self.SaveGCPs(None)
            elif ret == wx.NO:
                # restore POINTS file from backup
                if os.path.exists(self.file['control_points_bak']):
                    shutil.copy(self.file['control_points_bak'], self.file['control_points'])

            if os.path.exists(self.file['control_points_bak']):
                os.unlink(self.file['control_points_bak'])

            self.SrcMap.Clean()
            self.TgtMap.Clean()

            self.grwiz.Cleanup()
            self._mgr.UnInit()

            self.Destroy()

        # event.Skip()

    def OnGROrder(self, event):
        """
        sets transformation order for georectifying
        """
        if event:
            self.gr_order = event.GetInt() + 1

        numOfItems = self.list.GetItemCount()
        minNumOfItems = numOfItems

        if self.gr_order == 1:
            minNumOfItems = 3
            # self.SetStatusText(_('Insufficient points, 3+ points needed for 1st order'))

        elif self.gr_order == 2:
            minNumOfItems = 6
            diff = 6 - numOfItems
            # self.SetStatusText(_('Insufficient points, 6+ points needed for 2nd order'))

        elif self.gr_order == 3:
            minNumOfItems = 10
            # self.SetStatusText(_('Insufficient points, 10+ points needed for 3rd order'))

        for i in range(minNumOfItems - numOfItems):
            self.AddGCP(None)

        return minNumOfItems

    def RMSError(self, xygroup, order):
        """
        Uses i.ortho.transform to calculate forward and backward error for each used GCP
        in CONTROL_POINTS file and insert error values into GCP list.
        Calculates total forward and backward RMS error for all used points
        """
        # save GCPs to points file to make sure that all checked GCPs are used
        self.SaveGCPs(None)
        # self.SetStatusText('')

        if self.CheckGCPcount(msg=True) == False:
            return

        # get list of forward and reverse rms error values for each point
        self.grwiz.SwitchEnv('source')

        ret = RunCommand('i.ortho.transform',
                         parent=self,
                         read=True,
                         group=xygroup)

        self.grwiz.SwitchEnv('target')

        if ret:
            errlist = ret.splitlines()
        else:
            GError(parent=self,
                   message=_('Could not calculate RMS Error.\n'
                             'Possible error with i.ortho.transform.'))
            return

        # insert error values into GCP list for checked items
        sdfactor = float(
            UserSettings.Get(
                group='gcpman',
                key='rms',
                subkey='sdfactor'))
        GCPcount = 0
        sumsq_fwd_err = 0.0
        sumsq_bkw_err = 0.0
        sum_fwd_err = 0.0
        highest_fwd_err = 0.0
        self.highest_key = 0
        highest_idx = 0

        for index in range(self.list.GetItemCount()):
            key = self.list.GetItemData(index)
            if self.list.IsItemChecked(index):
                fwd_err, bkw_err = errlist[GCPcount].split()
                self.list.SetItem(index, 7, fwd_err)
                self.list.SetItem(index, 8, bkw_err)
                self.mapcoordlist[key][7] = float(fwd_err)
                self.mapcoordlist[key][8] = float(bkw_err)
                self.list.SetItemTextColour(index, wx.BLACK)
                if self.highest_only:
                    if highest_fwd_err < float(fwd_err):
                        highest_fwd_err = float(fwd_err)
                        self.highest_key = key
                        highest_idx = index

                sumsq_fwd_err += float(fwd_err)**2
                sumsq_bkw_err += float(bkw_err)**2
                sum_fwd_err += float(fwd_err)
                GCPcount += 1
            else:
                self.list.SetItem(index, 7, '')
                self.list.SetItem(index, 8, '')
                self.mapcoordlist[key][7] = 0.0
                self.mapcoordlist[key][8] = 0.0
                self.list.SetItemTextColour(index, wx.BLACK)

        # SD
        if GCPcount > 0:
            self.rmsmean = sum_fwd_err / GCPcount
            self.rmssd = ((sumsq_fwd_err - self.rmsmean**2)**0.5)
            self.rmsthresh = self.rmsmean + sdfactor * self.rmssd
        else:
            self.rmsthresh = 0
            self.rmsmean = 0
            self.rmssd = 0

        if self.highest_only and highest_fwd_err > 0.0:
            self.list.SetItemTextColour(highest_idx, wx.RED)
        elif GCPcount > 0 and self.rmsthresh > 0 and not self.highest_only:
            for index in range(self.list.GetItemCount()):
                if self.list.IsItemChecked(index):
                    key = self.list.GetItemData(index)
                    if (self.mapcoordlist[key][7] > self.rmsthresh):
                        self.list.SetItemTextColour(index, wx.RED)

        # calculate global RMS error (geometric mean)
        self.fwd_rmserror = round((sumsq_fwd_err / GCPcount)**0.5, 4)
        self.bkw_rmserror = round((sumsq_bkw_err / GCPcount)**0.5, 4)
        self.list.ResizeColumns()

    def GetNewExtent(self, region, map=None):

        coord_file = utils.GetTempfile()
        newreg = {'n': 0.0, 's': 0.0, 'e': 0.0, 'w': 0.0, }

        try:
            f = open(coord_file, mode='w')
            # NW corner
            f.write(str(region['e']) + " " + str(region['n']) + "\n")
            # NE corner
            f.write(str(region['e']) + " " + str(region['s']) + "\n")
            # SW corner
            f.write(str(region['w']) + " " + str(region['n']) + "\n")
            # SE corner
            f.write(str(region['w']) + " " + str(region['s']) + "\n")
        finally:
            f.close()

        # save GCPs to points file to make sure that all checked GCPs are used
        self.SaveGCPs(None)

        order = self.gr_order
        self.gr_order = 1

        if self.CheckGCPcount(msg=True) == False:
            self.gr_order = order
            return

        self.gr_order = order

        # get list of forward and reverse rms error values for each point
        self.grwiz.SwitchEnv('source')

        if map == 'source':
            ret = RunCommand('i.ortho.transform',
                             parent=self,
                             read=True,
                             group=self.xygroup,
                             format='dst',
                             coords=coord_file)

        elif map == 'target':
            ret = RunCommand('i.ortho.transform',
                             parent=self,
                             read=True,
                             group=self.xygroup,
                             flags='r',
                             format='src',
                             coords=coord_file)

        os.unlink(coord_file)

        self.grwiz.SwitchEnv('target')

        if ret:
            errlist = ret.splitlines()
        else:
            GError(parent=self,
                   message=_('Could not calculate new extends.\n'
                             'Possible error with i.ortho.transform.'))
            return

        # fist corner
        e, n = errlist[0].split()
        fe = float(e)
        fn = float(n)
        newreg['n'] = fn
        newreg['s'] = fn
        newreg['e'] = fe
        newreg['w'] = fe
        # other three corners
        for i in range(1, 4):
            e, n = errlist[i].split()
            fe = float(e)
            fn = float(n)
            if fe < newreg['w']:
                newreg['w'] = fe
            if fe > newreg['e']:
                newreg['e'] = fe
            if fn < newreg['s']:
                newreg['s'] = fn
            if fn > newreg['n']:
                newreg['n'] = fn

        return newreg

    def OnHelp(self, event):
        """Show GCP Manager manual page"""
        self._giface.Help(entry='wxGUI.gcp')

    def OnUpdateActive(self, event):

        if self.activemap.GetSelection() == 0:
            self.MapWindow = self.SrcMapWindow
            self.Map = self.SrcMap
        else:
            self.MapWindow = self.TgtMapWindow
            self.Map = self.TgtMap

        self.UpdateActive(self.MapWindow)
        # for wingrass
        if os.name == 'nt':
            self.MapWindow.SetFocus()

    def UpdateActive(self, win):

        # optionally disable tool zoomback tool
        self.GetMapToolbar().Enable('zoomback',
                                    enable=(len(self.MapWindow.zoomhistory) > 1))

        if self.activemap.GetSelection() != (win == self.TgtMapWindow):
            self.activemap.SetSelection(win == self.TgtMapWindow)
        self.StatusbarUpdate()

    def AdjustMap(self, newreg):
        """Adjust map window to new extents
        """

        # adjust map window
        self.Map.region['n'] = newreg['n']
        self.Map.region['s'] = newreg['s']
        self.Map.region['e'] = newreg['e']
        self.Map.region['w'] = newreg['w']

        self.MapWindow.ZoomHistory(self.Map.region['n'], self.Map.region['s'],
                                   self.Map.region['e'], self.Map.region['w'])

        # LL locations
        if self.Map.projinfo['proj'] == 'll':
            if newreg['n'] > 90.0:
                newreg['n'] = 90.0
            if newreg['s'] < -90.0:
                newreg['s'] = -90.0

        ce = newreg['w'] + (newreg['e'] - newreg['w']) / 2
        cn = newreg['s'] + (newreg['n'] - newreg['s']) / 2

        # calculate new center point and display resolution
        self.Map.region['center_easting'] = ce
        self.Map.region['center_northing'] = cn
        self.Map.region["ewres"] = (newreg['e'] - newreg['w']) / self.Map.width
        self.Map.region["nsres"] = (
            newreg['n'] - newreg['s']) / self.Map.height
        self.Map.AlignExtentFromDisplay()

        self.MapWindow.ZoomHistory(self.Map.region['n'], self.Map.region['s'],
                                   self.Map.region['e'], self.Map.region['w'])

        if self.MapWindow.redrawAll is False:
            self.MapWindow.redrawAll = True

        self.MapWindow.UpdateMap()
        self.StatusbarUpdate()

    def OnZoomToSource(self, event):
        """Set target map window to match extents of source map window
        """

        if not self.MapWindow == self.TgtMapWindow:
            self.MapWindow = self.TgtMapWindow
            self.Map = self.TgtMap
            self.UpdateActive(self.TgtMapWindow)

        # get new N, S, E, W for target
        newreg = self.GetNewExtent(self.SrcMap.region, 'source')
        if newreg:
            self.AdjustMap(newreg)

    def OnZoomToTarget(self, event):
        """Set source map window to match extents of target map window
        """

        if not self.MapWindow == self.SrcMapWindow:
            self.MapWindow = self.SrcMapWindow
            self.Map = self.SrcMap
            self.UpdateActive(self.SrcMapWindow)

        # get new N, S, E, W for target
        newreg = self.GetNewExtent(self.TgtMap.region, 'target')
        if newreg:
            self.AdjustMap(newreg)

    def OnZoomMenuGCP(self, event):
        """Popup Zoom menu
        """
        point = wx.GetMousePosition()
        zoommenu = Menu()
        # Add items to the menu

        zoomsource = wx.MenuItem(zoommenu, wx.ID_ANY, _(
            'Adjust source display to target display'))
        zoommenu.AppendItem(zoomsource)
        self.Bind(wx.EVT_MENU, self.OnZoomToTarget, zoomsource)

        zoomtarget = wx.MenuItem(zoommenu, wx.ID_ANY, _(
            'Adjust target display to source display'))
        zoommenu.AppendItem(zoomtarget)
        self.Bind(wx.EVT_MENU, self.OnZoomToSource, zoomtarget)

        # Popup the menu. If an item is selected then its handler
        # will be called before PopupMenu returns.
        self.PopupMenu(zoommenu)
        zoommenu.Destroy()

    def OnSize(self, event):
        """Adjust Map Windows after GCP Map Display has been resized
        """
        # re-render image on idle
        self.resize = grass.clock()
        super(MapFrame, self).OnSize(event)

    def OnIdle(self, event):
        """GCP Map Display resized, adjust Map Windows
        """
        if self.GetMapToolbar():
            if self.resize and self.resize + 0.2 < grass.clock():
                srcwidth, srcheight = self.SrcMapWindow.GetSize()
                tgtwidth, tgtheight = self.TgtMapWindow.GetSize()
                srcwidth = (srcwidth + tgtwidth) / 2
                if self.show_target:
                    self._mgr.GetPane("target").Hide()
                    self._mgr.Update()
                self._mgr.GetPane("source").BestSize((srcwidth, srcheight))
                self._mgr.GetPane("target").BestSize((srcwidth, tgtheight))
                if self.show_target:
                    self._mgr.GetPane("target").Show()
                self._mgr.Update()
                self.resize = False
            elif self.resize:
                event.RequestMore()
        pass


class GCPList(ListCtrl,
              CheckListCtrlMixin,
              ListCtrlAutoWidthMixin):

    def __init__(self, parent, gcp, id=wx.ID_ANY,
                 pos=wx.DefaultPosition, size=wx.DefaultSize,
                 style=wx.LC_REPORT | wx.SUNKEN_BORDER | wx.LC_HRULES |
                 wx.LC_SINGLE_SEL):

        ListCtrl.__init__(self, parent, id, pos, size, style)

        self.gcp = gcp  # GCP class
        self.render = True

        # Mixin settings
        CheckListCtrlMixin.__init__(self)
        ListCtrlAutoWidthMixin.__init__(self)
        # TextEditMixin.__init__(self)

        # tracks whether list items are checked or not
        self.CheckList = []

        self._Create()

        self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected)
        self.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnItemActivated)
        self.Bind(wx.EVT_LIST_COL_CLICK, self.OnColClick)

        self.selected = wx.NOT_FOUND
        self.selectedkey = -1

    def _Create(self):

        if 0:
            # normal, simple columns
            idx_col = 0
            for col in (_('use'),
                        _('source E'),
                        _('source N'),
                        _('source Z'),
                        _('target E'),
                        _('target N'),
                        _('target Z'),
                        _('Forward error'),
                        _('Backward error')):
                self.InsertColumn(idx_col, col)
                idx_col += 1
        else:
            # the hard way: we want images on the column header
            info = wx.ListItem()
            info.SetMask(
                wx.LIST_MASK_TEXT | wx.LIST_MASK_IMAGE | wx.LIST_MASK_FORMAT)
            info.SetImage(-1)
            info.m_format = wx.LIST_FORMAT_LEFT

            idx_col = 0
            for lbl in (_('use'),
                        _('source E'),
                        _('source N'),
                        _('source Z'),
                        _('target E'),
                        _('target N'),
                        _('target Z'),
                        _('Forward error'),
                        _('Backward error')):
                info.SetText(lbl)
                self.InsertColumn(idx_col, info)
                idx_col += 1

    def LoadData(self):
        """Load data into list"""
        self.DeleteAllItems()

        self.render = False
        if os.path.isfile(self.gcp.file['control_points']):
            self.gcp.ReadGCPs()
        else:
            # 3 gcp is minimum
            for i in range(3):
                self.gcp.AddGCP(None)

        # select first point by default
        self.selected = 0
        self.selectedkey = self.GetItemData(self.selected)
        self.SetItemState(self.selected,
                          wx.LIST_STATE_SELECTED,
                          wx.LIST_STATE_SELECTED)

        self.ResizeColumns()
        self.render = True

        self.EnsureVisible(self.selected)

    def OnCheckItem(self, index, flag):
        """Item is checked/unchecked"""

        if self.render:
            # redraw points
            sourceMapWin = self.gcp.SrcMapWindow
            sourceMapWin.UpdateMap(render=False, renderVector=False)
            if self.gcp.show_target:
                targetMapWin = self.gcp.TgtMapWindow
                targetMapWin.UpdateMap(render=False, renderVector=False)

    def AddGCPItem(self):
        """
        Appends an item to GCP list
        """
        self.selectedkey = self.GetItemCount() + 1

        self.Append([str(self.selectedkey),    # GCP number
                     '0.0',                # source E
                     '0.0',                # source N
                     '0.0',                # source Z
                     '0.0',                # target E
                     '0.0',                # target N
                     '0.0',                # target Z
                     '',                   # forward error
                     ''])                  # backward error

        self.selected = self.GetItemCount() - 1
        self.SetItemData(self.selected, self.selectedkey)

        self.SetItemState(self.selected,
                          wx.LIST_STATE_SELECTED,
                          wx.LIST_STATE_SELECTED)

        self.ResizeColumns()

        self.gcp.pointsToDrawSrc.AddItem(
            coords=[0, 0], label=str(self.selectedkey))
        self.gcp.pointsToDrawTgt.AddItem(
            coords=[0, 0], label=str(self.selectedkey))

        self.EnsureVisible(self.selected)

        return self.selected

    def DeleteGCPItem(self):
        """Deletes selected item in GCP list.
        """
        if self.selected == wx.NOT_FOUND:
            return

        key = self.GetItemData(self.selected)
        self.DeleteItem(self.selected)

        if self.selected != wx.NOT_FOUND:
            item = self.gcp.pointsToDrawSrc.GetItem(key - 1)
            self.gcp.pointsToDrawSrc.DeleteItem(item)

            item = self.gcp.pointsToDrawTgt.GetItem(key - 1)
            self.gcp.pointsToDrawTgt.DeleteItem(item)

        return key

    def ResizeColumns(self):
        """Resize columns"""
        minWidth = [90, 120]
        for i in range(self.GetColumnCount()):
            self.SetColumnWidth(i, wx.LIST_AUTOSIZE)
            # first column is checkbox, don't set to minWidth
            if i > 0 and self.GetColumnWidth(i) < minWidth[i > 4]:
                self.SetColumnWidth(i, minWidth[i > 4])

        self.SendSizeEvent()

    def GetSelected(self):
        """Get index of selected item"""
        return self.selected

    def OnItemSelected(self, event):
        """Item selected
        """
        if self.render and self.selected != event.GetIndex():
            self.selected = event.GetIndex()
            self.selectedkey = self.GetItemData(self.selected)
            sourceMapWin = self.gcp.SrcMapWindow
            sourceMapWin.UpdateMap(render=False, renderVector=False)
            if self.gcp.show_target:
                targetMapWin = self.gcp.TgtMapWindow
                targetMapWin.UpdateMap(render=False, renderVector=False)
        event.Skip()

    def OnItemActivated(self, event):
        """
        When item double clicked, open editor to update coordinate values
        """
        coords = []
        index = event.GetIndex()
        key = self.GetItemData(index)
        changed = False

        for i in range(1, 7):
            coords.append(self.GetItem(index, i).GetText())

        dlg = EditGCP(parent=self, id=wx.ID_ANY, data=coords, gcpno=key)

        if dlg.ShowModal() == wx.ID_OK:
            values = dlg.GetValues()  # string

            if len(values) == 0:
                GError(parent=self, message=_(
                    "Invalid coordinate value. Operation canceled."))
            else:
                for i in range(len(values)):
                    if values[i] != coords[i]:
                        self.SetItem(index, i + 1, values[i])
                        changed = True

                if changed:
                    # reset RMS and update mapcoordlist
                    self.SetItem(index, 7, '')
                    self.SetItem(index, 8, '')
                    key = self.GetItemData(index)
                    self.gcp.mapcoordlist[key] = [key,
                                                  float(values[0]),
                                                  float(values[1]),
                                                  float(values[2]),
                                                  float(values[3]),
                                                  float(values[4]),
                                                  float(values[5]),
                                                  0.0,
                                                  0.0]

                    self.gcp.pointsToDrawSrc.GetItem(
                        key - 1).SetCoords([float(values[0]), float(values[1])])
                    self.gcp.pointsToDrawTgt.GetItem(
                        key - 1).SetCoords([float(values[3]), float(values[4])])
                    self.gcp.UpdateColours()

    def OnColClick(self, event):
        """ListCtrl forgets selected item..."""
        self.selected = self.FindItem(-1, self.selectedkey)
        self.SetItemState(self.selected,
                          wx.LIST_STATE_SELECTED,
                          wx.LIST_STATE_SELECTED)

        event.Skip()


class VectGroup(wx.Dialog):
    """Dialog to create a vector group (VREF file) for georectifying

    .. todo::
        Replace by g.group
    """

    def __init__(self, parent, id, grassdb, location, mapset, group,
                 style=wx.DEFAULT_DIALOG_STYLE):

        wx.Dialog.__init__(self, parent, id, style=style,
                           title=_("Create vector map group"))

        self.grassdatabase = grassdb
        self.xylocation = location
        self.xymapset = mapset
        self.xygroup = group

        #
        # get list of valid vector directories
        #
        vectlist = os.listdir(os.path.join(self.grassdatabase,
                                           self.xylocation,
                                           self.xymapset,
                                           'vector'))
        for dir in vectlist:
            if not os.path.isfile(os.path.join(self.grassdatabase,
                                               self.xylocation,
                                               self.xymapset,
                                               'vector',
                                               dir,
                                               'coor')):
                vectlist.remove(dir)

        utils.ListSortLower(vectlist)

        # path to vref file
        self.vgrpfile = os.path.join(self.grassdatabase,
                                     self.xylocation,
                                     self.xymapset,
                                     'group',
                                     self.xygroup,
                                     'VREF')

        #
        # buttons
        #
        self.btnCancel = Button(parent=self,
                                id=wx.ID_CANCEL)
        self.btnOK = Button(parent=self,
                            id=wx.ID_OK)
        self.btnOK.SetDefault()

        #
        # list of vector maps
        #
        self.listMap = CheckListBox(parent=self, id=wx.ID_ANY,
                                    choices=vectlist)

        if os.path.isfile(self.vgrpfile):
            f = open(self.vgrpfile)
            try:
                checked = []
                for line in f.readlines():
                    line = line.replace('\n', '')
                    if len(line) < 1:
                        continue
                    checked.append(line)
                self.listMap.SetCheckedStrings(checked)
            finally:
                f.close()

        line = wx.StaticLine(parent=self,
                             id=wx.ID_ANY, size=(20, -1),
                             style=wx.LI_HORIZONTAL)

        #
        # layout
        #
        sizer = wx.BoxSizer(wx.VERTICAL)

        box = wx.BoxSizer(wx.HORIZONTAL)
        box.Add(
            StaticText(
                parent=self,
                id=wx.ID_ANY,
                label=_('Select vector map(s) to add to group:')),
            flag=wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_RIGHT | wx.LEFT,
            border=5)

        box.Add(self.listMap,
                flag=wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_RIGHT | wx.LEFT,
                border=5)

        sizer.Add(box, flag=wx.ALIGN_RIGHT | wx.ALL,
                  border=3)

        sizer.Add(line, proportion=0,
                  flag=wx.GROW | wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT,
                  border=5)

        # buttons
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(self.btnCancel)
        btnSizer.AddButton(self.btnOK)
        btnSizer.Realize()

        sizer.Add(btnSizer, proportion=0,
                  flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER,
                  border=5)

        self.SetSizer(sizer)
        sizer.Fit(self)
        self.Layout()

    def MakeVGroup(self):
        """Create VREF file"""
        vgrouplist = []
        for item in range(self.listMap.GetCount()):
            if not self.listMap.IsChecked(item):
                continue
            vgrouplist.append(
                self.listMap.GetString(item) +
                '@' +
                self.xymapset)

        f = open(self.vgrpfile, mode='w')
        try:
            for vect in vgrouplist:
                f.write(vect + '\n')
        finally:
            f.close()


class EditGCP(wx.Dialog):

    def __init__(self, parent, data, gcpno, id=wx.ID_ANY,
                 title=_("Edit GCP"),
                 style=wx.DEFAULT_DIALOG_STYLE):
        """Dialog for editing GPC and map coordinates in list control"""

        wx.Dialog.__init__(self, parent, id, title=title, style=style)

        panel = wx.Panel(parent=self)

        sizer = wx.BoxSizer(wx.VERTICAL)

        box = StaticBox(
            parent=panel, id=wx.ID_ANY, label=" %s %s " %
            (_("Ground Control Point No."), str(gcpno)))
        boxSizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        # source coordinates
        gridSizer = wx.GridBagSizer(vgap=5, hgap=5)
        self.xcoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))
        self.ycoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))
        self.zcoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))
        self.ecoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))
        self.ncoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))
        self.hcoord = TextCtrl(parent=panel, id=wx.ID_ANY, size=(150, -1))

        # swap source N, target E
        tmp_coord = data[1]
        data[1] = data[2]
        data[2] = tmp_coord

        row = 0
        col = 0
        idx = 0
        for label, win in ((_("source E:"), self.xcoord),
                           (_("target E:"), self.ecoord),
                           (_("source N:"), self.ycoord),
                           (_("target N:"), self.ncoord),
                           (_("source Z:"), self.zcoord),
                           (_("target Z:"), self.hcoord)):
            label = StaticText(parent=panel, id=wx.ID_ANY,
                               label=label)
            gridSizer.Add(label,
                          flag=wx.ALIGN_CENTER_VERTICAL,
                          pos=(row, col))

            col += 1
            win.SetValue(str(data[idx]))

            gridSizer.Add(win,
                          pos=(row, col))

            col += 1
            idx += 1

            if col > 3:
                row += 1
                col = 0

        boxSizer.Add(gridSizer, proportion=1,
                     flag=wx.EXPAND | wx.ALL, border=5)

        sizer.Add(boxSizer, proportion=1,
                  flag=wx.EXPAND | wx.ALL, border=5)

        #
        # buttons
        #
        self.btnCancel = Button(panel, wx.ID_CANCEL)
        self.btnOk = Button(panel, wx.ID_OK)
        self.btnOk.SetDefault()

        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(self.btnCancel)
        btnSizer.AddButton(self.btnOk)
        btnSizer.Realize()

        sizer.Add(btnSizer, proportion=0,
                  flag=wx.ALIGN_RIGHT | wx.ALL, border=5)

        panel.SetSizer(sizer)
        sizer.Fit(self)

    def GetValues(self, columns=None):
        """Return list of values (as strings).
        """
        valuelist = []
        try:
            float(self.xcoord.GetValue())
            float(self.ycoord.GetValue())
            float(self.zcoord.GetValue())
            float(self.ecoord.GetValue())
            float(self.ncoord.GetValue())
            float(self.hcoord.GetValue())
        except ValueError:
            return valuelist

        valuelist.append(self.xcoord.GetValue())
        valuelist.append(self.ycoord.GetValue())
        valuelist.append(self.zcoord.GetValue())
        valuelist.append(self.ecoord.GetValue())
        valuelist.append(self.ncoord.GetValue())
        valuelist.append(self.hcoord.GetValue())

        return valuelist


class GrSettingsDialog(wx.Dialog):

    def __init__(
            self, parent, id, giface, title, pos=wx.DefaultPosition,
            size=wx.DefaultSize, style=wx.DEFAULT_DIALOG_STYLE):
        wx.Dialog.__init__(self, parent, id, title, pos, size, style)
        """
        Dialog to set profile text options: font, title
        and font size, axis labels and font size
        """
        #
        # initialize variables
        #
        self.parent = parent
        self.new_src_map = src_map
        self.new_tgt_map = {'raster': tgt_map['raster'],
                            'vector': tgt_map['vector']}
        self.sdfactor = 0

        self.symbol = {}

        self.methods = ["nearest",
                        "linear",
                        "linear_f",
                        "cubic",
                        "cubic_f",
                        "lanczos",
                        "lanczos_f"]

        # notebook
        notebook = wx.Notebook(parent=self, id=wx.ID_ANY, style=wx.BK_DEFAULT)
        self.__CreateSymbologyPage(notebook)
        self.__CreateRectificationPage(notebook)

        # buttons
        btnSave = Button(self, wx.ID_SAVE)
        btnApply = Button(self, wx.ID_APPLY)
        btnClose = Button(self, wx.ID_CLOSE)
        btnApply.SetDefault()

        # bindings
        btnApply.Bind(wx.EVT_BUTTON, self.OnApply)
        btnApply.SetToolTip(_("Apply changes for the current session"))
        btnSave.Bind(wx.EVT_BUTTON, self.OnSave)
        btnSave.SetToolTip(
            _("Apply and save changes to user settings file (default for next sessions)"))
        btnClose.Bind(wx.EVT_BUTTON, self.OnClose)
        btnClose.SetToolTip(_("Close dialog"))

        # sizers
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(btnApply, flag=wx.LEFT | wx.RIGHT, border=5)
        btnSizer.Add(btnSave, flag=wx.LEFT | wx.RIGHT, border=5)
        btnSizer.Add(btnClose, flag=wx.LEFT | wx.RIGHT, border=5)

        # sizers
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(
            notebook,
            proportion=1,
            flag=wx.EXPAND | wx.ALL,
            border=5)
        mainSizer.Add(btnSizer, proportion=0,
                      flag=wx.ALIGN_RIGHT | wx.ALL, border=5)
        #              flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

    def __CreateSymbologyPage(self, notebook):
        """Create notebook page with symbology settings"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Symbology"))

        sizer = wx.BoxSizer(wx.VERTICAL)

        rmsgridSizer = wx.GridBagSizer(vgap=5, hgap=5)

        # highlight only highest forward RMS error
        self.highlighthighest = wx.CheckBox(
            parent=panel, id=wx.ID_ANY,
            label=_("Highlight highest RMS error only"))
        hh = UserSettings.Get(group='gcpman', key='rms', subkey='highestonly')
        self.highlighthighest.SetValue(hh)
        rmsgridSizer.Add(
            self.highlighthighest,
            flag=wx.ALIGN_CENTER_VERTICAL,
            pos=(
                0,
                0))

        # RMS forward error threshold
        rmslabel = StaticText(
            parent=panel, id=wx.ID_ANY,
            label=_("Highlight RMS error > M + SD * factor:"))
        rmslabel.SetToolTip(
            _(
                "Highlight GCPs with an RMS error larger than \n"
                "mean + standard deviation * given factor. \n"
                "Recommended values for this factor are between 1 and 2."))
        rmsgridSizer.Add(
            rmslabel,
            flag=wx.ALIGN_CENTER_VERTICAL,
            pos=(
                1,
                0))
        sdfactor = UserSettings.Get(
            group='gcpman', key='rms', subkey='sdfactor')
        self.rmsWin = TextCtrl(parent=panel, id=wx.ID_ANY,
                               size=(70, -1), style=wx.TE_NOHIDESEL)
        self.rmsWin.SetValue("%s" % str(sdfactor))
        if (self.parent.highest_only == True):
            self.rmsWin.Disable()

        self.symbol['sdfactor'] = self.rmsWin.GetId()
        rmsgridSizer.Add(self.rmsWin, flag=wx.ALIGN_RIGHT, pos=(1, 1))
        rmsgridSizer.AddGrowableCol(1)
        sizer.Add(rmsgridSizer, flag=wx.EXPAND | wx.ALL, border=5)

        box = StaticBox(parent=panel, id=wx.ID_ANY,
                        label=" %s " % _("Symbol settings"))
        boxSizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        gridSizer = wx.GridBagSizer(vgap=5, hgap=5)

        #
        # general symbol color
        #
        row = 0
        label = StaticText(parent=panel, id=wx.ID_ANY, label=_("Color:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        col = UserSettings.Get(group='gcpman', key='symbol', subkey='color')
        colWin = csel.ColourSelect(parent=panel, id=wx.ID_ANY,
                                   colour=wx.Colour(col[0],
                                                    col[1],
                                                    col[2],
                                                    255))
        self.symbol['color'] = colWin.GetId()
        gridSizer.Add(colWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))

        #
        # symbol color for high forward RMS error
        #
        row += 1
        label = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Color for high RMS error:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        hcol = UserSettings.Get(group='gcpman', key='symbol', subkey='hcolor')
        hcolWin = csel.ColourSelect(parent=panel, id=wx.ID_ANY,
                                    colour=wx.Colour(hcol[0],
                                                     hcol[1],
                                                     hcol[2],
                                                     255))
        self.symbol['hcolor'] = hcolWin.GetId()
        gridSizer.Add(hcolWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))

        #
        # symbol color for selected GCP
        #
        row += 1
        label = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Color for selected GCP:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        scol = UserSettings.Get(group='gcpman', key='symbol', subkey='scolor')
        scolWin = csel.ColourSelect(parent=panel, id=wx.ID_ANY,
                                    colour=wx.Colour(scol[0],
                                                     scol[1],
                                                     scol[2],
                                                     255))
        self.symbol['scolor'] = scolWin.GetId()
        gridSizer.Add(scolWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))

        #
        # symbol color for unused GCP
        #
        row += 1
        label = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Color for unused GCPs:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        ucol = UserSettings.Get(group='gcpman', key='symbol', subkey='ucolor')
        ucolWin = csel.ColourSelect(parent=panel, id=wx.ID_ANY,
                                    colour=wx.Colour(ucol[0],
                                                     ucol[1],
                                                     ucol[2],
                                                     255))
        self.symbol['ucolor'] = ucolWin.GetId()
        gridSizer.Add(ucolWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))

        # show unused GCPs
        row += 1
        self.showunused = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                      label=_("Show unused GCPs"))
        shuu = UserSettings.Get(group='gcpman', key='symbol', subkey='unused')
        self.showunused.SetValue(shuu)
        gridSizer.Add(
            self.showunused,
            flag=wx.ALIGN_CENTER_VERTICAL,
            pos=(
                row,
                0))

        #
        # symbol size
        #
        row += 1
        label = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Symbol size:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        symsize = int(
            UserSettings.Get(
                group='gcpman',
                key='symbol',
                subkey='size'))
        sizeWin = SpinCtrl(parent=panel, id=wx.ID_ANY,
                           min=1, max=20)
        sizeWin.SetValue(symsize)
        self.symbol['size'] = sizeWin.GetId()
        gridSizer.Add(sizeWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))

        #
        # symbol width
        #
        row += 1
        label = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Line width:"))
        gridSizer.Add(label, flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0))
        width = int(
            UserSettings.Get(
                group='gcpman',
                key='symbol',
                subkey='width'))
        widWin = SpinCtrl(parent=panel, id=wx.ID_ANY,
                          min=1, max=10)
        widWin.SetValue(width)
        self.symbol['width'] = widWin.GetId()
        gridSizer.Add(widWin,
                      flag=wx.ALIGN_RIGHT,
                      pos=(row, 1))
        gridSizer.AddGrowableCol(1)

        boxSizer.Add(gridSizer, flag=wx.EXPAND)
        sizer.Add(boxSizer, flag=wx.EXPAND | wx.ALL, border=5)

        #
        # maps to display
        #
        # source map to display
        self.srcselection = Select(
            panel,
            id=wx.ID_ANY,
            size=globalvar.DIALOG_GSELECT_SIZE,
            type='maptype',
            updateOnPopup=False)
        self.parent.grwiz.SwitchEnv('source')
        self.srcselection.SetElementList(maptype)
        # filter out all maps not in group
        self.srcselection.tcp.GetElementList(elements=self.parent.src_maps)

        # target map(s) to display
        self.parent.grwiz.SwitchEnv('target')
        self.tgtrastselection = Select(
            panel, id=wx.ID_ANY, size=globalvar.DIALOG_GSELECT_SIZE,
            type='raster', updateOnPopup=False)
        self.tgtrastselection.SetElementList('cell')
        self.tgtrastselection.GetElementList()

        self.tgtvectselection = Select(
            panel, id=wx.ID_ANY, size=globalvar.DIALOG_GSELECT_SIZE,
            type='vector', updateOnPopup=False)
        self.tgtvectselection.SetElementList('vector')
        self.tgtvectselection.GetElementList()

        sizer.Add(
            StaticText(
                parent=panel,
                id=wx.ID_ANY,
                label=_('Select source map to display:')),
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        sizer.Add(
            self.srcselection,
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        self.srcselection.SetValue(src_map)
        sizer.Add(
            StaticText(
                parent=panel,
                id=wx.ID_ANY,
                label=_('Select target raster map to display:')),
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        sizer.Add(
            self.tgtrastselection,
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        self.tgtrastselection.SetValue(tgt_map['raster'])
        sizer.Add(
            StaticText(
                parent=panel,
                id=wx.ID_ANY,
                label=_('Select target vector map to display:')),
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        sizer.Add(
            self.tgtvectselection,
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        self.tgtvectselection.SetValue(tgt_map['vector'])

        # bindings
        self.highlighthighest.Bind(wx.EVT_CHECKBOX, self.OnHighlight)
        self.rmsWin.Bind(wx.EVT_TEXT, self.OnSDFactor)
        self.srcselection.Bind(wx.EVT_TEXT, self.OnSrcSelection)
        self.tgtrastselection.Bind(wx.EVT_TEXT, self.OnTgtRastSelection)
        self.tgtvectselection.Bind(wx.EVT_TEXT, self.OnTgtVectSelection)

        panel.SetSizer(sizer)

        return panel

    def __CreateRectificationPage(self, notebook):
        """Create notebook page with symbology settings"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Rectification"))

        sizer = wx.BoxSizer(wx.VERTICAL)

        # transformation order
        self.rb_grorder = wx.RadioBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Select rectification order"),
            choices=[
                _('1st order'),
                _('2nd order'),
                _('3rd order')],
            majorDimension=wx.RA_SPECIFY_COLS)
        sizer.Add(self.rb_grorder, proportion=0,
                  flag=wx.EXPAND | wx.ALL, border=5)
        self.rb_grorder.SetSelection(self.parent.gr_order - 1)

        # interpolation method
        gridSizer = wx.GridBagSizer(vgap=5, hgap=5)
        gridSizer.Add(
            StaticText(
                parent=panel,
                id=wx.ID_ANY,
                label=_('Select interpolation method:')),
            pos=(
                0,
                0),
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        self.grmethod = wx.Choice(parent=panel, id=wx.ID_ANY,
                                  choices=self.methods)
        gridSizer.Add(self.grmethod, pos=(0, 1),
                      flag=wx.ALIGN_RIGHT, border=5)
        self.grmethod.SetStringSelection(self.parent.gr_method)
        gridSizer.AddGrowableCol(1)
        sizer.Add(gridSizer, flag=wx.EXPAND | wx.ALL, border=5)

        # clip to region
        self.check = wx.CheckBox(parent=panel, id=wx.ID_ANY, label=_(
            "clip to computational region in target location"))
        sizer.Add(self.check, proportion=0,
                  flag=wx.EXPAND | wx.ALL, border=5)
        self.check.SetValue(self.parent.clip_to_region)

        # extension
        sizer.Add(
            StaticText(
                parent=panel,
                id=wx.ID_ANY,
                label=_('Extension for output maps:')),
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)
        self.ext_txt = TextCtrl(
            parent=panel, id=wx.ID_ANY, value="", size=(
                350, -1))
        self.ext_txt.SetValue(self.parent.extension)
        sizer.Add(
            self.ext_txt,
            proportion=0,
            flag=wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL | wx.ALL,
            border=5)

        # bindings
        self.ext_txt.Bind(wx.EVT_TEXT, self.OnExtension)
        self.Bind(wx.EVT_RADIOBOX, self.parent.OnGROrder, self.rb_grorder)
        self.Bind(wx.EVT_CHOICE, self.OnMethod, self.grmethod)
        self.Bind(wx.EVT_CHECKBOX, self.OnClipRegion, self.check)

        panel.SetSizer(sizer)

        return panel

    def OnHighlight(self, event):
        """Checkbox 'highlighthighest' checked/unchecked"""
        if self.highlighthighest.IsChecked():
            self.parent.highest_only = True
            self.rmsWin.Disable()
        else:
            self.parent.highest_only = False
            self.rmsWin.Enable()

    def OnSDFactor(self, event):
        """New factor for RMS threshold = M + SD * factor"""
        try:
            self.sdfactor = float(self.rmsWin.GetValue())
        except ValueError:
            return
        if self.sdfactor <= 0:
            GError(parent=self,
                   message=_('RMS threshold factor must be > 0'))
        elif self.sdfactor < 1:
            GError(parent=self,
                   message=_('RMS threshold factor is < 1\n'
                             'Too many points might be highlighted'))

    def OnSrcSelection(self, event):
        """Source map to display selected"""
        global src_map

        tmp_map = self.srcselection.GetValue()

        if not tmp_map == '' and not tmp_map == src_map:
            self.new_src_map = tmp_map

    def OnTgtRastSelection(self, event):
        """Target map to display selected"""
        global tgt_map

        self.new_tgt_map['raster'] = self.tgtrastselection.GetValue()

    def OnTgtVectSelection(self, event):
        """Target map to display selected"""
        global tgt_map

        self.new_tgt_map['vector'] = self.tgtvectselection.GetValue()

    def OnMethod(self, event):
        self.parent.gr_method = self.methods[event.GetSelection()]

    def OnClipRegion(self, event):
        self.parent.clip_to_region = event.IsChecked()

    def OnExtension(self, event):
        self.parent.extension = self.ext_txt.GetValue()

    def UpdateSettings(self):
        global src_map
        global tgt_map
        global maptype

        layers = None

        UserSettings.Set(group='gcpman', key='rms', subkey='highestonly',
                         value=self.highlighthighest.GetValue())

        if self.sdfactor > 0:
            UserSettings.Set(group='gcpman', key='rms', subkey='sdfactor',
                             value=self.sdfactor)

            self.parent.sdfactor = self.sdfactor
            if self.parent.rmsthresh > 0:
                self.parent.rmsthresh = self.parent.rmsmean + self.parent.sdfactor * self.parent.rmssd

        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='color',
            value=tuple(
                wx.FindWindowById(
                    self.symbol['color']).GetColour()))
        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='hcolor',
            value=tuple(
                wx.FindWindowById(
                    self.symbol['hcolor']).GetColour()))
        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='scolor',
            value=tuple(
                wx.FindWindowById(
                    self.symbol['scolor']).GetColour()))
        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='ucolor',
            value=tuple(
                wx.FindWindowById(
                    self.symbol['ucolor']).GetColour()))
        UserSettings.Set(group='gcpman', key='symbol', subkey='unused',
                         value=self.showunused.GetValue())
        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='size',
            value=wx.FindWindowById(
                self.symbol['size']).GetValue())
        UserSettings.Set(
            group='gcpman',
            key='symbol',
            subkey='width',
            value=wx.FindWindowById(
                self.symbol['width']).GetValue())

        srcrender = False
        srcrenderVector = False
        tgtrender = False
        tgtrenderVector = False
        reload_target = False
        if self.new_src_map != src_map:
            # remove old layer
            layers = self.parent.grwiz.SrcMap.GetListOfLayers()
            self.parent.grwiz.SrcMap.DeleteLayer(layers[0])

            src_map = self.new_src_map
            if maptype == 'raster':
                cmdlist = ['d.rast', 'map=%s' % src_map]
                srcrender = True
            else:
                cmdlist = ['d.vect', 'map=%s' % src_map]
                srcrenderVector = True
            self.parent.grwiz.SwitchEnv('source')
            name, found = utils.GetLayerNameFromCmd(cmdlist)
            self.parent.grwiz.SrcMap.AddLayer(
                ltype=maptype, command=cmdlist, active=True, name=name,
                hidden=False, opacity=1.0, render=False)

            self.parent.grwiz.SwitchEnv('target')

        if self.new_tgt_map['raster'] != tgt_map['raster'] or \
           self.new_tgt_map['vector'] != tgt_map['vector']:
            # remove all layers
            layers = self.parent.grwiz.TgtMap.GetListOfLayers()
            while layers:
                self.parent.grwiz.TgtMap.DeleteLayer(layers[0])
                del layers[0]
                layers = self.parent.grwiz.TgtMap.GetListOfLayers()
            # self.parent.grwiz.TgtMap.DeleteAllLayers()
            reload_target = True
            tgt_map['raster'] = self.new_tgt_map['raster']
            tgt_map['vector'] = self.new_tgt_map['vector']

            if tgt_map['raster'] != '':
                cmdlist = ['d.rast', 'map=%s' % tgt_map['raster']]
                name, found = utils.GetLayerNameFromCmd(cmdlist)
                self.parent.grwiz.TgtMap.AddLayer(
                    ltype='raster', command=cmdlist, active=True, name=name,
                    hidden=False, opacity=1.0, render=False)

                tgtrender = True

            if tgt_map['vector'] != '':
                cmdlist = ['d.vect', 'map=%s' % tgt_map['vector']]
                name, found = utils.GetLayerNameFromCmd(cmdlist)
                self.parent.grwiz.TgtMap.AddLayer(
                    ltype='vector', command=cmdlist, active=True, name=name,
                    hidden=False, opacity=1.0, render=False)

                tgtrenderVector = True

        if tgt_map['raster'] == '' and tgt_map['vector'] == '':
            if self.parent.show_target == True:
                self.parent.show_target = False
                self.parent._mgr.GetPane("target").Hide()
                self.parent._mgr.Update()
                self.parent.activemap.SetSelection(0)
                self.parent.activemap.Enable(False)
                self.parent.GetMapToolbar().Enable('zoommenu', enable=False)
        else:
            if self.parent.show_target == False:
                self.parent.show_target = True
                self.parent._mgr.GetPane("target").Show()
                self.parent._mgr.Update()
                self.parent.activemap.SetSelection(0)
                self.parent.activemap.Enable(True)
                self.parent.GetMapToolbar().Enable('zoommenu', enable=True)
                self.parent.TgtMapWindow.ZoomToMap(
                    layers=self.parent.TgtMap.GetListOfLayers())

        self.parent.UpdateColours(
            srcrender,
            srcrenderVector,
            tgtrender,
            tgtrenderVector)
        self.parent.SetSettings()

    def OnSave(self, event):
        """Button 'Save' pressed"""
        self.UpdateSettings()
        fileSettings = {}
        UserSettings.ReadSettingsFile(settings=fileSettings)
        fileSettings['gcpman'] = UserSettings.Get(group='gcpman')
        file = UserSettings.SaveToFile(fileSettings)
        self.parent._giface.WriteLog(
            _('GCP Manager settings saved to file \'%s\'.') %
            file)
        # self.Close()

    def OnApply(self, event):
        """Button 'Apply' pressed"""
        self.UpdateSettings()
        # self.Close()

    def OnClose(self, event):
        """Button 'Cancel' pressed"""
        self.Close()