| /******************************************************************************* |
| * 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.ui.internal.fieldassist; |
| |
| import org.eclipse.jface.fieldassist.FieldAssistColors; |
| import org.eclipse.jface.fieldassist.IControlContentAdapter; |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.FocusListener; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.widgets.Control; |
| |
| /** |
| * DecoratedFieldColorer watches for focus changes on a control and colors the |
| * field when it loses focus and is empty. |
| * |
| * @since 3.2 |
| */ |
| public class RequiredFieldColorer implements FocusListener { |
| |
| private Control control; |
| |
| private IControlContentAdapter contentAdapter; |
| |
| private Color originalBackgroundColor; |
| |
| /** |
| * Create a RequiredFieldColorer on the specified control. |
| * |
| * @param control |
| * the control to watch |
| * @param contentAdapter |
| * the content adapter used to retrieve the control's content |
| */ |
| public RequiredFieldColorer(Control control, |
| IControlContentAdapter contentAdapter) { |
| super(); |
| this.contentAdapter = contentAdapter; |
| this.control = control; |
| originalBackgroundColor = control.getBackground(); |
| } |
| |
| public void focusGained(FocusEvent event) { |
| control.setBackground(originalBackgroundColor); |
| } |
| |
| public void focusLost(FocusEvent event) { |
| if (contentAdapter.getControlContents(control).length() == 0) { |
| control.setBackground(FieldAssistColors |
| .getRequiredFieldBackgroundColor(control)); |
| } |
| } |
| } |