Resolves: #i118813# Update slide sorter after page format is modified

(cherry picked from commit b8f5370a)

Conflicts:
	sd/source/ui/slidesorter/view/SlsPageObjectPainter.cxx

Change-Id: I42553defdce1636190e8c5c226774135e179e25d

sd/source/ui/slidesorter/inc/view/SlsPageObjectPainter.hxx

@@ -122,6 +122,12 @@ private:
         const BitmapEx& rOverlay,
         const OutputDevice* pReferenceDevice) const;
     void InvalidateBitmaps (void);
+
+    /** Update the local pointer to the page object layouter to the
+        one owned by the general layouter.
+        Return <TRUE/> when after the call we have a valid page object layouter.
+    */
+    bool UpdatePageObjectLayouter (void);
 };
 
 } } } // end of namespace sd::slidesorter::view

sd/source/ui/slidesorter/view/SlsPageObjectPainter.cxx

@@ -81,6 +81,27 @@ PageObjectPainter::~PageObjectPainter (void)
 void PageObjectPainter::PaintPageObject (
     OutputDevice& rDevice,
     const model::SharedPageDescriptor& rpDescriptor)
+{
+    if (UpdatePageObjectLayouter())
+    {
+        // Turn off antialiasing to avoid the bitmaps from being
+        // shifted by fractions of a pixel and thus show blurry edges.
+        const sal_uInt16 nSavedAntialiasingMode (rDevice.GetAntialiasing());
+        rDevice.SetAntialiasing(nSavedAntialiasingMode & ~ANTIALIASING_ENABLE_B2DDRAW);
+
+        PaintBackground(rDevice, rpDescriptor);
+        PaintPreview(rDevice, rpDescriptor);
+        PaintPageNumber(rDevice, rpDescriptor);
+        PaintTransitionEffect(rDevice, rpDescriptor);
+
+        rDevice.SetAntialiasing(nSavedAntialiasingMode);
+    }
+}
+
+
+
+
+bool PageObjectPainter::UpdatePageObjectLayouter (void)
 {
     // The page object layouter is quite volatile. It may have been replaced
     // since the last call.  Update it now.
@@ -88,20 +109,10 @@ void PageObjectPainter::PaintPageObject (
     if ( ! mpPageObjectLayouter)
     {
         OSL_ASSERT(mpPageObjectLayouter);
-        return;
+        return false;
     }
-
-    // Turn off antialiasing to avoid the bitmaps from being shifted by
-    // fractions of a pixel and thus show blurry edges.
-    const sal_uInt16 nSavedAntialiasingMode (rDevice.GetAntialiasing());
-    rDevice.SetAntialiasing(nSavedAntialiasingMode & ~ANTIALIASING_ENABLE_B2DDRAW);
-
-    PaintBackground(rDevice, rpDescriptor);
-    PaintPreview(rDevice, rpDescriptor);
-    PaintPageNumber(rDevice, rpDescriptor);
-    PaintTransitionEffect(rDevice, rpDescriptor);
-
-    rDevice.SetAntialiasing(nSavedAntialiasingMode);
+    else
+        return true;
 }
 
 
@@ -112,7 +123,7 @@ void PageObjectPainter::NotifyResize (const bool bForce)
     mpPageObjectLayouter = mrLayouter.GetPageObjectLayouter();
     if (bForce || ! mpPageObjectLayouter)
         InvalidateBitmaps();
-    else
+    else if (UpdatePageObjectLayouter())
     {
         const Size aSize (mpPageObjectLayouter->GetSize(
                 PageObjectLayouter::FocusIndicator,