crosshair and pan toolbar buttons are mutually exclusive

src/damaris/gui/DamarisGUI.py

@@ -3014,6 +3014,9 @@ class MonitorWidgets:
         #self.matplot_toolbar.DeleteToolByPos(1)
         #self.matplot_toolbar.remove(self.matplot_toolbar.get_nth_item(3))
         self.matplot_toolbar.remove(self.matplot_toolbar.get_nth_item(6))
+        # crosshair and Pan button are mutually exclusive
+        self.matplot_pan_button = self.matplot_toolbar._gtk_ids['Pan']
+        self.matplot_pan_button.connect( 'toggled', self.toggle_pan_button )
         # now let's add a button to the toolbar
         self.matplot_cursor_button = gtk.ToggleButton(label='')
         cursor_icon = GdkPixbuf.Pixbuf.new_from_xpm_data( crosshair_xpm )
@@ -3662,6 +3665,11 @@ class MonitorWidgets:
         self._pan_start = None
         self._zoom_drag = None
 
+    def toggle_pan_button(self, button):
+        """Deactivate the crosshair button when the Pan mode is activated."""
+        if button.get_active( ) and self.matplot_cursor_button.get_active( ):
+            self.matplot_cursor_button.set_active( False )
+
     def toggle_cursor(self, widget):
         """Toggle matplotlib crosshair cursor"""
         if widget.get_active():
@@ -3670,7 +3678,9 @@ class MonitorWidgets:
                 self.matplot_cursor = CrosshairCursor(self.matplot_axes,
                                                       color='red', linewidth=1)
                 self.matplot_canvas.draw()
-            # TODO: Deactivate the pane button
+            # leave the Pan mode, the two buttons are mutually exclusive
+            if self.matplot_pan_button.get_active( ):
+                self.matplot_pan_button.set_active( False )
 
         else:
             # Deactivate cursor