[GRASS-SVN] r42613 - grass/trunk/gui/wxpython/gui_modules

[svn_grass at osgeo.org]

Author: martinl
Date: 2010-06-20 22:03:26 +0000 (Sun, 20 Jun 2010)
New Revision: 42613

Modified:
   grass/trunk/gui/wxpython/gui_modules/mapdisp.py
Log:
wxGUI: don't fail on empty map when saving display


Modified: grass/trunk/gui/wxpython/gui_modules/mapdisp.py
===================================================================
--- grass/trunk/gui/wxpython/gui_modules/mapdisp.py	2010-06-20 21:03:32 UTC (rev 42612)
+++ grass/trunk/gui/wxpython/gui_modules/mapdisp.py	2010-06-20 22:03:26 UTC (rev 42613)
@@ -1171,7 +1171,13 @@
             ltype = [{ 'ext' : 'ppm', 'type' : -1 },
                      { 'ext' : 'tif', 'type' : wx.BITMAP_TYPE_TIF }]
         else:
-            filetype, ltype = gdialogs.GetImageHandlers(self.MapWindow.img)
+            img = self.MapWindow.img
+            if not img:
+                gcmd.GMessage(parent = self,
+                              message = _("Nothing to render (empty map). Operation canceled."),
+                              msgType = 'info')
+                return
+            filetype, ltype = gdialogs.GetImageHandlers(img)
         
         # get size
         dlg = gdialogs.ImageSizeDialog(self)