Bug 307163 DBCS3.6: Resource Filter UI didn't restore grouped filters
Build Identifier: I20100313-1044 When reopening Resource Filters property editor after adding several filters under either of top-level AND/OR/NOT group, none of children in such top-level group filter is shown while settings are actually persisted in .project. Reproducible: Always Steps to Reproduce: 1. Create a project and add some files and folders. 2. Add resource filters to the project or the folder just created, and filters are grouped by AND/OR/NOT. 3. Ensure filters are active for exiting resources under the project. 4. Reopen "Resource Fileters" property editor 5. Verify the filters added in Step 2 are restored. Problem: None of child filters under top-level AND/OR/NOT group is shown Expected: All nested child filters under top-level AND/OR/NOT group are totally shown. Note that persistent entries for all filters are actually existing in a .project file.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceFilterGroup.java
*/
		public void dragStart(DragSourceEvent event) {
			if (getFilterCopySelection().length == 0)
				event.doit = false;
		}
	}
	private static int getMinimumColumnWidth(TreeColumn column, int hint) {
		Assert.isNotNull(column);
		FontMetrics fontMetrics;
		GC gc = new GC(column.getParent());
		try {
			gc.setFont(column.getParent().getFont());
			fontMetrics = gc.getFontMetrics();
		} finally {
			gc.dispose();
		}
		return Math.max(hint, fontMetrics.getAverageCharWidth()
				* column.getText().length());
	}
	private void createButtonGroup(Composite parent) {
		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginWidth = 0;
		layout.marginHeight = 0;
		layout.numColumns = 1;
		composite.setLayout(layout);
		GridData data = new GridData(SWT.FILL, SWT.FILL, false, false);
		composite.setLayoutData(data);
		composite.setFont(parent.getFont());
		addButton = new Button(composite, SWT.PUSH);