diff -up wxPython-src-3.0.2.0/wxPython/wx/lib/mixins/listctrl.py.editzeroheight wxPython-src-3.0.2.0/wxPython/wx/lib/mixins/listctrl.py
--- wxPython-src-3.0.2.0/wxPython/wx/lib/mixins/listctrl.py.editzeroheight	2014-10-13 18:37:52.000000000 -0400
+++ wxPython-src-3.0.2.0/wxPython/wx/lib/mixins/listctrl.py	2015-09-29 20:57:15.334780365 -0400
@@ -604,7 +604,11 @@ class TextEditMixin:
         y0 = self.GetItemRect(row)[1]
         
         editor = self.editor
-        editor.SetDimensions(x0-scrolloffset,y0, x1,-1)
+        # Temp fix: for some reason on GTK3, setting the height as -1 (default)
+        # with the above code flow results in the height being zero.  Work
+        # around this by setting the height to the existing height.  Upstream
+        # bug reported: http://trac.wxwidgets.org/ticket/17160
+        editor.SetDimensions(x0-scrolloffset,y0, x1,editor.GetSize()[1])
         
         editor.SetValue(self.GetItem(row, col).GetText()) 
         editor.Show()