supporting content size scaling (retina display)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67001 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/core/private.h

@@ -235,6 +235,10 @@ public :
     virtual void        GetPosition( int &x, int &y ) const = 0;
     virtual void        GetSize( int &width, int &height ) const = 0;
     virtual void        SetControlSize( wxWindowVariant variant ) = 0;
+    virtual float       GetContentScaleFactor() const 
+    {
+        return 1.0;
+    }
     
     // the native coordinates may have an 'aura' for shadows etc, if this is the case the layout
     // inset indicates on which insets the real control is drawn

include/wx/osx/iphone/private.h

@@ -56,7 +56,8 @@ public :
     virtual void        GetPosition( int &x, int &y ) const;
     virtual void        GetSize( int &width, int &height ) const;
     virtual void        SetControlSize( wxWindowVariant variant );
-
+    virtual float       GetContentScaleFactor() const ;
+    
     virtual void        SetNeedsDisplay( const wxRect* where = NULL );
     virtual bool        GetNeedsDisplay() const;
 

include/wx/osx/window.h

@@ -266,6 +266,9 @@ public:
     virtual bool        OSXHandleKeyEvent( wxKeyEvent& event );
 
     bool                IsNativeWindowWrapper() const { return m_isNativeWindowWrapper; }
+    
+    float               GetContentScaleFactor() const ;
+    
 protected:
     // For controls like radio buttons which are genuinely composite
     wxList              m_subControls;