| /******************************************************************************* |
| * Copyright (c) 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.pde.internal.ui.editor.outline; |
| |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.events.MouseEvent; |
| import org.eclipse.swt.events.MouseMoveListener; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.*; |
| |
| /** |
| * QuickOutlineMouseMoveListener |
| * |
| */ |
| public class QuickOutlineMouseMoveListener implements MouseMoveListener { |
| |
| private TreeItem fLastItem; |
| |
| private TreeViewer fTreeViewer; |
| |
| /** |
| * |
| */ |
| public QuickOutlineMouseMoveListener(TreeViewer treeViewer) { |
| fLastItem = null; |
| fTreeViewer = treeViewer; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.swt.events.MouseMoveListener#mouseMove(org.eclipse.swt.events.MouseEvent) |
| */ |
| public void mouseMove(MouseEvent e) { |
| Tree tree = fTreeViewer.getTree(); |
| if (tree.equals(e.getSource())) { |
| Object o = tree.getItem(new Point(e.x, e.y)); |
| if (o instanceof TreeItem) { |
| if (!o.equals(fLastItem)) { |
| fLastItem = (TreeItem) o; |
| tree.setSelection(new TreeItem[] {fLastItem}); |
| } else if (e.y < tree.getItemHeight() / 4) { |
| // Scroll up |
| Point p = tree.toDisplay(e.x, e.y); |
| Item item = fTreeViewer.scrollUp(p.x, p.y); |
| if (item instanceof TreeItem) { |
| fLastItem = (TreeItem) item; |
| tree.setSelection(new TreeItem[] {fLastItem}); |
| } |
| } else if (e.y > tree.getBounds().height - tree.getItemHeight() / 4) { |
| // Scroll down |
| Point p = tree.toDisplay(e.x, e.y); |
| Item item = fTreeViewer.scrollDown(p.x, p.y); |
| if (item instanceof TreeItem) { |
| fLastItem = (TreeItem) item; |
| tree.setSelection(new TreeItem[] {fLastItem}); |
| } |
| } |
| } |
| } |
| } |
| |
| } |