Disable hover highlight in Jface TreeViewer on windows platform in eclipse rcp app

Question

On windows platform, I am implementing a TreeViewer. I added listeners for SWT.MeasureItem, SWT.PaintItem, and SWT.EraseItem. In SWT.EraseItem listener, I am clearin SWT.HOT bit too. Even after that I get hover highlight of that tree item. I want to completely disable the Hover Changes in tree. How can I achieve that?

I am developing eclipse e4 rcp application. I am using StyledCellLabelProvider for tree viewer and also tried specifying COLORS_ON_SELECTION. Still no luck.

Answer 1

The following snippet works for me.

package test;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class TestTreeViewer {

public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setSize(250, 200);
    shell.setLayout(new FillLayout());

    TreeViewer treeViewer = new TreeViewer(shell);
    Tree tree = treeViewer.getTree();

    TreeItem child1 = new TreeItem(tree, SWT.NONE, 0);
    child1.setText("1");
    TreeItem child2 = new TreeItem(tree, SWT.NONE, 1);
    child2.setText("2");
    TreeItem child3 = new TreeItem(tree, SWT.NONE, 2);
    child3.setText("3");

    tree.addListener(SWT.EraseItem, new Listener() {

        @Override
        public void handleEvent(Event event) {
//          allow selection in tree?
//          event.detail &= ~SWT.SELECTED;
            event.detail &= ~SWT.HOT;
        }
    });

    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
  }
}