Is there way to auto resize percentage columns when column group is collapsed/expaned in NatTable - eclipse

Question

I found ResizeColumnHideShowLayer class at nattable version 1.6.
(about https://bugs.eclipse.org/bugs/show_bug.cgi?id=521486)
That is work fine for normal column headers only.
But, if I collapse a column group, no adjust size to fit window. (no increasing column size)
How can I solve the problem?
Is there way to resize other columns to fit window automatically increase?
Thank you.

Answer 1

Currently not because the ColumnGroupExpandCollapseLayer is taking care of hiding collapsed columns.

Answer 2

I found solution by myself!
It works fine very well. :-)
I was run based on NatTable v1.6 version.(downloaded yesterday)
I think this is a basic feature, so I hope this feature will be included in the next NatTable version.
In narrow tables, behavior that collapsing column group means that may be someone want to view other column data more widely.
Overview (Problem screen and solved screen)
I explain using two application(before, after) screen shot.
Refer to bottom image if you want understand my issue easily at once.
Problem screen
enter image description here
Improved screen
enter image description here
Solution summary :
Add event listener to ColumnGroupExpandCollapseLayer.
      (HideColumnPositionsEvent, ShowColumnPositionsEvent)
Handle above events.
      Get column indices which is hidden by collapsed
      Execute MultiColumnHideCommand with the indices
Layer structure of my test code
↑ ViewportLayer (top layer)
| SelectionLayer
| ColumnGroupExpandCollapseLayer
| ResizeColumnHideShowLayer
| ColumnGroupReorderLayer
| ColumnReorderLayer
| DataLayer (base layer)
Implementation code is below:
void method() {
...
columnGroupExpandCollapseLayer.addLayerListener(new ILayerListener() {
#Override
public void handleLayerEvent(ILayerEvent event) {
boolean doRedraw = false;
//It works for HideColumnPositionsEvent and ShowColumnPositionsEvent
// triggered by ColumnGroupExpandCollapseCommandHandler
if (event instanceof HideColumnPositionsEvent) {
HideColumnPositionsEvent hideEvent = (HideColumnPositionsEvent)event;
Collection<Range> columnPositionRanges = hideEvent.getColumnPositionRanges();
Collection<Integer> convertIntegerCollection = convertIntegerCollection(columnPositionRanges);
int[] positions = convertIntPrimitiveArray(convertIntegerCollection);
//Execute command to hide columns that was hidden by collapsed column group.
MultiColumnHideCommand multiColumnHideCommand = new MultiColumnHideCommand(resizeColumnHideShowLayer, positions);
resizeColumnHideShowLayer.doCommand(multiColumnHideCommand);
doRedraw = true;
}else if (event instanceof ShowColumnPositionsEvent) {//called by ColumnGroupCollapsedCollapseCommandHandler
ShowColumnPositionsEvent showEvent = (ShowColumnPositionsEvent)event;
Collection<Range> columnPositionRanges = showEvent.getColumnPositionRanges();
Collection<Integer> positions = convertIntegerCollection(columnPositionRanges);
//Execute command to show columns that was hidden by expanded column group.
MultiColumnShowCommand multiColumnShowCommand = new MultiColumnShowCommand(positions);
resizeColumnHideShowLayer.doCommand(multiColumnShowCommand);
//Set whether or not to redraw table
doRedraw = true;
}
if (doRedraw) {
natTable.redraw();
}
}
/**
* Merge position values within several Ranges to Integer collection
*/
private Collection<Integer> convertIntegerCollection(Collection<Range> rangeCollection) {
Iterator<Range> rangeIterator = rangeCollection.iterator();
Set<Integer> mergedPositionSet = new HashSet<Integer>();
while (rangeIterator.hasNext()) {
Range range = rangeIterator.next();
mergedPositionSet.addAll(range.getMembers());
}
return mergedPositionSet;
}
/**
* Convert Integer wrapper object to primitive value
*/
private int [] convertIntPrimitiveArray(Collection<Integer> integerCollection) {
Integer [] integers = (Integer [])integerCollection.toArray(new Integer[integerCollection.size()]);
int [] positionPrimitives = new int[integers.length];
for (int i = 0 ; i < integers.length ; i++) {
positionPrimitives[i] = integers[i].intValue();
}
return positionPrimitives;
}
});
}