sidebar Panel - setup background in ApplySettings

Change-Id: I89ea754dbbb64e535ca719af4e7d949ac117df0a

sfx2/source/sidebar/Panel.cxx

@@ -58,8 +58,6 @@ Panel::Panel(const PanelDescriptor& rPanelDescriptor,
     , maDeckLayoutTrigger(rDeckLayoutTrigger)
     , maContextAccess(rContextAccess)
 {
-    SetBackground(Theme::GetPaint(Theme::Paint_PanelBackground).GetWallpaper());
-
 #ifdef DEBUG
     SetText(OUString("Panel"));
 #endif
@@ -70,6 +68,11 @@ Panel::~Panel()
     disposeOnce();
 }
 
+void Panel::ApplySettings(vcl::RenderContext& rRenderContext)
+{
+    rRenderContext.SetBackground(Theme::GetPaint(Theme::Paint_PanelBackground).GetWallpaper());
+}
+
 void Panel::dispose()
 {
     mxPanelComponent = NULL;
@@ -155,7 +158,7 @@ void Panel::Activate()
 void Panel::DataChanged (const DataChangedEvent& rEvent)
 {
     (void)rEvent;
-    SetBackground(Theme::GetPaint(Theme::Paint_PanelBackground).GetWallpaper());
+    Invalidate();
 }
 
 Reference<awt::XWindow> Panel::GetElementWindow()

sfx2/source/sidebar/Panel.hxx

@@ -58,6 +58,7 @@ public:
     virtual void Resize() SAL_OVERRIDE;
     virtual void DataChanged (const DataChangedEvent& rEvent) SAL_OVERRIDE;
     virtual void Activate() SAL_OVERRIDE;
+    virtual void ApplySettings(vcl::RenderContext& rRenderContext) SAL_OVERRIDE;
 
 private:
     const OUString msPanelId;