Added wxPGProperty::OnValidationFailure(); needed it and some other tweaks to allow vetoing value changes of ComboBox editors

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58047 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/property.h

@@ -1423,6 +1423,15 @@ public:
     */
     virtual wxPGEditorDialogAdapter* GetEditorDialog() const;
 
+    /**
+        Called whenever validation has failed with given pending value.
+
+        @remarks If you implement this in your custom property class, please
+                 remember to call the baser implementation as well, since they
+                 may use it to revert property into pre-change state.
+    */
+    virtual void OnValidationFailure( wxVariant& pendingValue );
+
     /** Append a new choice to property's list of choices.
     */
     int AddChoice( const wxString& label, int value = wxPG_INVALID_VALUE )

include/wx/propgrid/propgrid.h

@@ -1294,12 +1294,8 @@ public:
         To add your own validation failure behavior, override
         wxPropertyGrid::DoOnValidationFailure().
     */
-    bool OnValidationFailure( wxPGProperty* property, wxVariant& invalidValue )
-    {
-        bool res = DoOnValidationFailure(property, invalidValue);
-        property->SetFlag(wxPG_PROP_INVALID_VALUE);
-        return res;
-    }
+    bool OnValidationFailure( wxPGProperty* property,
+                              wxVariant& invalidValue );
 
     /** Called to indicate property and editor has valid value now.
     */

include/wx/propgrid/props.h

@@ -428,6 +428,8 @@ public:
     // this take advantage of it.
     virtual int GetChoiceSelection() const { return m_index; }
 
+    virtual void OnValidationFailure( wxVariant& pendingValue );
+
 protected:
 
     int GetIndex() const;
@@ -447,6 +449,7 @@ private:
 
     // Relies on ValidateValue being called always before OnSetValue
     static int              ms_nextIndex;
+    static int              ms_prevIndex;
 };
 
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