add a basic GetOptimalSize to progress bar

Change-Id: I34b98d4c98b3f9af062473f254ffeadb05130471

include/vcl/prgsbar.hxx

@@ -79,9 +79,10 @@ public:
     virtual void        Resize();
     virtual void        StateChanged( StateChangedType nStateChange );
     virtual void        DataChanged( const DataChangedEvent& rDCEvt );
+    virtual Size        GetOptimalSize() const;
 
     void                SetValue( sal_uInt16 nNewPercent );
-    sal_uInt16              GetValue() const { return mnPercent; }
+    sal_uInt16          GetValue() const { return mnPercent; }
 };
 
 #endif // INCLUDED_VCL_PRGSBAR_HXX

vcl/source/control/prgsbar.cxx

@@ -43,10 +43,15 @@ static WinBits clearProgressBarBorder( Window* pParent, WinBits nOrgStyle )
     return nOutStyle;
 }
 
+Size ProgressBar::GetOptimalSize() const
+{
+    return Size(150, 20);
+}
+
 ProgressBar::ProgressBar( Window* pParent, WinBits nWinStyle ) :
     Window( pParent, clearProgressBarBorder( pParent, nWinStyle ) )
 {
-    SetOutputSizePixel( Size( 150, 20 ) );
+    SetOutputSizePixel( GetOptimalSize() );
     ImplInit();
 }