| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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.draw2d; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.eclipse.swt.graphics.Image; |
| |
| /** |
| * A Checkbox is a toggle figure which toggles between the checked and unchecked |
| * figures to simulate a check box. A check box contains a text label to |
| * represent it. |
| */ |
| public final class CheckBox extends Toggle { |
| |
| private Label label = null; |
| |
| static final Image UNCHECKED = createImage("images/checkboxenabledoff.gif"), //$NON-NLS-1$ |
| CHECKED = createImage("images/checkboxenabledon.gif"); //$NON-NLS-1$ |
| |
| private static Image createImage(String name) { |
| InputStream stream = CheckBox.class.getResourceAsStream(name); |
| Image image = new Image(null, stream); |
| try { |
| stream.close(); |
| } catch (IOException ioe) { |
| } |
| return image; |
| } |
| |
| /** |
| * Constructs a CheckBox with no text. |
| * |
| * @since 2.0 |
| */ |
| public CheckBox() { |
| this(""); //$NON-NLS-1$ |
| } |
| |
| /** |
| * Constructs a CheckBox with the passed text in its label. |
| * |
| * @param text |
| * The label text |
| * @since 2.0 |
| */ |
| public CheckBox(String text) { |
| setContents(label = new Label(text, UNCHECKED)); |
| } |
| |
| /** |
| * Adjusts CheckBox's icon depending on selection status. |
| * |
| * @since 2.0 |
| */ |
| protected void handleSelectionChanged() { |
| if (isSelected()) |
| label.setIcon(CHECKED); |
| else |
| label.setIcon(UNCHECKED); |
| } |
| |
| /** |
| * Initializes this Clickable by setting a default model and adding a |
| * clickable event handler for that model. Also adds a ChangeListener to |
| * update icon when selection status changes. |
| * |
| * @since 2.0 |
| */ |
| protected void init() { |
| super.init(); |
| addChangeListener(new ChangeListener() { |
| public void handleStateChanged(ChangeEvent changeEvent) { |
| if (changeEvent.getPropertyName().equals( |
| ButtonModel.SELECTED_PROPERTY)) |
| handleSelectionChanged(); |
| } |
| }); |
| } |
| |
| } |