| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.examples.readmetool; |
| |
| import org.eclipse.jface.action.ControlContribution; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IPropertyListener; |
| |
| /** |
| * This class demonstrates the contribution of a custom control to the |
| * status line for the readme editor. The control shows the |
| * dirty status of the editor. |
| */ |
| public class DirtyStateContribution extends ControlContribution implements |
| IPropertyListener { |
| private Composite composite; |
| |
| private Label label; |
| |
| private IEditorPart activeEditor; |
| |
| /** |
| * Creates a new DirtyStateContribution. |
| */ |
| protected DirtyStateContribution() { |
| super("DirtyState"); //$NON-NLS-1$ |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ControlContribution |
| */ |
| protected Control createControl(Composite parent) { |
| // If the composite is good just return it. |
| if (composite != null && !composite.isDisposed()) |
| return composite; |
| |
| // Create composite for border. |
| composite = new Composite(parent, SWT.BORDER); |
| composite.setData(this); |
| |
| // Create label inside composite. |
| label = new Label(composite, SWT.NONE); |
| label.setSize(80, 15); |
| |
| updateState(); |
| return composite; |
| } |
| |
| /** |
| * Called when an editor is activated. |
| * |
| * @see ReadmeEditorActionBarContributor#setActiveEditor(IEditorPart) |
| */ |
| public void editorChanged(IEditorPart part) { |
| if (activeEditor != null) { |
| activeEditor.removePropertyListener(this); |
| } |
| activeEditor = part; |
| if (activeEditor != null) { |
| activeEditor.addPropertyListener(this); |
| } |
| updateState(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IPropertyListener |
| */ |
| public void propertyChanged(Object source, int propID) { |
| if (source instanceof IEditorPart) |
| updateState(); |
| } |
| |
| /** |
| * Updates the state of the label. |
| */ |
| private void updateState() { |
| if (label == null || label.isDisposed()) |
| return; |
| |
| boolean saveNeeded = false; |
| if (activeEditor != null) |
| saveNeeded = activeEditor.isDirty(); |
| if (saveNeeded) |
| label.setText(MessageUtil.getString("Save_Needed")); //$NON-NLS-1$ |
| else |
| label.setText(MessageUtil.getString("Clean")); //$NON-NLS-1$ |
| } |
| } |