Added wxPropertyGrid::WasValueChangedInEvent(), added code to avoid showing colour picker dialog twice when 'Custom' colour was picked from drop-down list

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61404 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/propgrid.h

@@ -882,6 +882,18 @@ public:
         Shows an brief error message that is related to a property.
     */
     void ShowPropertyError( wxPGPropArg id, const wxString& msg );
+
+    /**
+        You can use this member function, for instance, to detect in
+        wxPGProperty::OnEvent() if wxPGProperty::SetValueInEvent() was
+        already called in wxPGEditor::OnEvent(). It really only detects
+        if was value was changed using wxPGProperty::SetValueInEvent(), which
+        is usually used when a 'picker' dialog is displayed. If value was
+        written by "normal means" in wxPGProperty::StringToValue() or
+        IntToValue(), then this function will return false (on the other hand,
+        wxPGProperty::OnEvent() is not even called in those cases).
+    */
+    bool WasValueChangedInEvent() const;
 };