[Fill Handle] In combination with freeze the fill handle is not working

[fipro78]

When you try to enable the fill handle in a NatTable that has also the freeze feature enabled, the fill handle does not work in the frozen areas.

The reason is that the FillHandleLayerPainter stores the bounds of the fill handle internally, so they can be inspected in other places. In the freeze composition the FillHandleLayerPainter is executed for every region, so the fill handle bounds are only available for the non-frozen area.

The combination of freeze and fill handle should be possible in every case.

[fipro78]

To support the combination of the fill handle and the freeze functionality, the following changes needed to be introduced:

• Added a new interface FillHandleBoundsProvider
• Added a new helper class FillHandleLayerPainterHelper to retrieve fill handle configurations
• Extended CompositeLayer#CompositeLayerPainter and added the method processLayerPainterInformation(ILayerPainterpainter) which is called after each sub layer painter
• Added a new class FillHandleCompositeFreezeLayerPainter that makes use of the new processLayerPainterInformation() method to store the fill handle bounds from all 4 freeze regions once, and to paint the fill handle over the freeze border
• Added new constructors inDefaultFormulaConfiguration and FillHandleConfiguration that additionally takes a FillHandleBoundsProvider that should be used with the matcher

To make the combination of freeze and fill handle work correctly, the FillHandleCompositeFreezeLayerPainter needs to be used and configured:

this.compositeFreezeLayerPainter = new FillHandleCompositeFreezeLayerPainter(this.compositeFreezeLayer);
this.compositeFreezeLayer.setLayerPainter(this.compositeFreezeLayerPainter);

... 

natTable.addConfiguration(
        new FillHandleConfiguration(
                bodyLayer.getSelectionLayer(),
                bodyLayer.getCompositeFreezeLayerPainter()));

natTable.addConfiguration(
        new DefaultFormulaConfiguration(
                bodyLayer.getFormulaDataProvider(),
                bodyLayer.getSelectionLayer(),
                natTable.getInternalCellClipboard(),
                bodyLayer.getCompositeFreezeLayerPainter()));

There is also a new example _819_FormulaDataWithFreezeExample that shows the combination of formula support, fill handle, freeze and additionally the export to xlsx and showing the JFace ProgressDialog on export.