Added wxPropertyGridInterface::SetColumnProportion(); wxPG_SPLITTER_AUTO_CENTER window style now supports column counts higher than two.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63481 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/propgridiface.h

@@ -678,6 +678,18 @@ public:
     static void SetBoolChoices( const wxString& trueChoice,
                                 const wxString& falseChoice );
 
+    /**
+        Set proportion of a auto-stretchable column. wxPG_SPLITTER_AUTO_CENTER
+        window style needs to be used to indicate that columns are auto-
+        resizeable.
+
+        @returns Returns @false on failure.
+
+        @remarks You should call this for individual pages of
+                 wxPropertyGridManager (if used).
+    */
+    bool SetColumnProportion( unsigned int column, int proportion );
+
     /**
         Sets an attribute for this property.