GWT DataGrid Sorting and Coloring Cells (GWT 2.4)

[Ron Meyer]

Hello,

I try to sort an DataGrid which has color attributes set to its cell's programmatically.

I've done this via

TableCellElement cell = grid.getRowElement(i).getCells().getItem(colIndex);
cell.getStyle().setProperty("background", "#DDDDDD");

This works great - note that on the real thing, the color code is different per row object and not static - so CSS does not work here.

I also override the DataGrids redraw method to color the cells like this:

		DataGrid.Resources resources = GWT.create(IDataGridResources.class);
		dataGrid = new DataGrid<IDO>(50, resources) {
			@Override
			public void redraw() {
				// override the redraw method to handle background coloring
				super.redraw();
				Utils.setCellBackgroundColor(dataGrid, absTypeColor, "Color");
			}
		};

This all works great, but then i switched to ListDataProvider because i needed column sorting.
But this doesnt work, only in some cases, the color is applied.
I believe its a time race.

If the columns sort identically, e.g. the click on Sort would not change the order, due to identical entries,
the color appears. If the order indeed changes, the cells are not colored.
Anyone knows what i'm missing here?

Since dataGrid.redraw() is not triggered by Sorting, i override the onColumnSort method in addition.
The dataGrid.redraw() should run after Sorting is done i believe .....

	protected ListDataProvider<IDO> dataProvider = new ListDataProvider<IDO>(new ArrayList<IDO>());
	protected ListHandler<IDO> sortHandler = new ListHandler<IDO>(dataProvider.getList()) {
		
		// we want a redraw of the dataGrid after sorting - unfortunately this does not work in most cases
		@Override
		public void onColumnSort(ColumnSortEvent event) {
			super.onColumnSort(event);
			dataGrid.redraw();
		}
	};

Any help is appreciated.
Thanks