wxGUI/mapdisp: it is also possible to remove the MASK interactively (#1176)

With left mouse click on the MASK button widget inside statusbar.

gui/wxpython/mapdisp/statusbar.py

@@ -37,7 +37,7 @@ import wx
 from core import utils
 from core.gcmd import RunCommand
 from core.settings import UserSettings
-from gui_core.wrap import StaticText, TextCtrl
+from gui_core.wrap import Button, TextCtrl
 
 from grass.script import core as grass
 
@@ -283,7 +283,6 @@ class SbManager:
                     wWin = rect.width - 6
                 if idx == 2:  # mask
                     x += 5
-                    y += 4
                 elif idx == 3:  # render
                     x += 5
             win.SetPosition((x, y))
@@ -894,14 +893,20 @@ class SbProjection(SbItem):
 
 
 class SbMask(SbItem):
-    """StaticText to show whether mask is activated."""
+    """Button to show whether mask is activated and remove mask with
+    left mouse click
+    """
 
     def __init__(self, mapframe, statusbar, position=0):
         SbItem.__init__(self, mapframe, statusbar, position)
         self.name = "mask"
 
-        self.widget = StaticText(parent=self.statusbar, id=wx.ID_ANY, label=_("MASK"))
+        self.widget = Button(
+            parent=self.statusbar, id=wx.ID_ANY, label=_("MASK"), style=wx.NO_BORDER
+        )
+        self.widget.Bind(wx.EVT_BUTTON, self.OnRemoveMask)
         self.widget.SetForegroundColour(wx.Colour(255, 0, 0))
+        self.widget.SetToolTip(tip=_("Left mouse click to remove the MASK"))
         self.widget.Hide()
 
     def Update(self):
@@ -912,6 +917,24 @@ class SbMask(SbItem):
         else:
             self.Hide()
 
+    def OnRemoveMask(self, event):
+        if grass.find_file(
+            name="MASK", element="cell", mapset=grass.gisenv()["MAPSET"]
+        )["name"]:
+
+            dlg = wx.MessageDialog(
+                self.mapFrame,
+                message=_("Are you sure that you want to remove the MASK?"),
+                caption=_("Remove MASK"),
+                style=wx.YES_NO | wx.YES_DEFAULT | wx.ICON_QUESTION,
+            )
+            if dlg.ShowModal() != wx.ID_YES:
+                dlg.Destroy()
+                return
+            RunCommand("r.mask", flags="r")
+            self.Hide()
+            self.mapFrame.OnRender(event=None)
+
 
 class SbTextItem(SbItem):
     """Base class for items without widgets.