| /******************************************************************************* |
| * Copyright (c) 2000, 2007 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.ui.forms.widgets; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.PaintEvent; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.widgets.Composite; |
| /** |
| * A custom selectable control that can be used to control areas that can be |
| * expanded or collapsed. The control control can be toggled between selected |
| * and deselected state with a mouse or by pressing 'Enter' while the control |
| * has focus. |
| * <p> |
| * The control is rendered as box with a '+' or '-' sign, depending on the |
| * expansion state. Focus indication is rendered around the box when the |
| * control has keyboard focus. |
| * |
| * @see Twistie |
| * @since 3.0 |
| */ |
| public class TreeNode extends ToggleHyperlink { |
| /** |
| * Creates a control in a provided composite. |
| * |
| * @param parent |
| * the parent |
| * @param style |
| * the style |
| */ |
| public TreeNode(Composite parent, int style) { |
| super(parent, style); |
| innerWidth = 10; |
| innerHeight = 10; |
| } |
| protected void paint(PaintEvent e) { |
| paintHyperlink(e.gc); |
| } |
| protected void paintHyperlink(GC gc) { |
| Rectangle box = getBoxBounds(gc); |
| gc.setForeground(getDisplay().getSystemColor( |
| SWT.COLOR_WIDGET_NORMAL_SHADOW)); |
| gc.drawRectangle(box); |
| gc.setForeground(getForeground()); |
| gc.drawLine(box.x + 2, box.y + 4, box.x + 6, box.y + 4); |
| if (!isExpanded()) { |
| gc.drawLine(box.x + 4, box.y + 2, box.x + 4, box.y + 6); |
| } |
| if (paintFocus && getSelection()) { |
| gc.setForeground(getForeground()); |
| gc.drawFocus(box.x - 1, box.y - 1, box.width + 3, box.height + 3); |
| } |
| } |
| private Rectangle getBoxBounds(GC gc) { |
| int x = 1; |
| int y = 0; |
| gc.setFont(getFont()); |
| //int height = gc.getFontMetrics().getHeight(); |
| //y = height / 2 - 4; |
| //y = Math.max(y, 0); |
| y = 2; |
| return new Rectangle(x, y, 8, 8); |
| } |
| } |