| /******************************************************************************* |
| * Copyright (c) 2007, 2008 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.menus; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.events.DisposeListener; |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.FocusListener; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Widget; |
| import org.eclipse.ui.AbstractSourceProvider; |
| import org.eclipse.ui.ISources; |
| import org.eclipse.ui.swt.IFocusService; |
| |
| /** |
| * @since 3.3 |
| * |
| */ |
| public class FocusControlSourceProvider extends AbstractSourceProvider |
| implements IFocusService { |
| |
| /** |
| * The names of the sources supported by this source provider. |
| */ |
| private static final String[] PROVIDED_SOURCE_NAMES = new String[] { |
| ISources.ACTIVE_FOCUS_CONTROL_ID_NAME, |
| ISources.ACTIVE_FOCUS_CONTROL_NAME }; |
| |
| Map controlToId = new HashMap(); |
| private FocusListener focusListener; |
| |
| private String currentId; |
| |
| private Control currentControl; |
| |
| private DisposeListener disposeListener; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.menus.IFocusService#addTrackerFor(org.eclipse.swt.widgets.Control, |
| * java.lang.String) |
| */ |
| public void addFocusTracker(Control control, String id) { |
| if (control.isDisposed()) { |
| return; |
| } |
| controlToId.put(control, id); |
| control.addFocusListener(getFocusListener()); |
| control.addDisposeListener(getDisposeListener()); |
| } |
| |
| private DisposeListener getDisposeListener() { |
| if (disposeListener == null) { |
| disposeListener = new DisposeListener() { |
| public void widgetDisposed(DisposeEvent e) { |
| controlToId.remove(e.widget); |
| } |
| }; |
| } |
| return disposeListener; |
| } |
| |
| private FocusListener getFocusListener() { |
| if (focusListener == null) { |
| focusListener = new FocusListener() { |
| public void focusGained(FocusEvent e) { |
| focusIn(e.widget); |
| } |
| |
| public void focusLost(FocusEvent e) { |
| focusIn(null); |
| } |
| }; |
| } |
| return focusListener; |
| } |
| |
| /** |
| * @param widget |
| */ |
| private void focusIn(Widget widget) { |
| String id = (String) controlToId.get(widget); |
| if (currentId != id) { |
| Map m = new HashMap(); |
| if (id == null) { |
| currentId = null; |
| currentControl = null; |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_ID_NAME, |
| IEvaluationContext.UNDEFINED_VARIABLE); |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_NAME, |
| IEvaluationContext.UNDEFINED_VARIABLE); |
| } else { |
| currentId = id; |
| currentControl = (Control) widget; |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_ID_NAME, currentId); |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_NAME, currentControl); |
| } |
| fireSourceChanged(ISources.ACTIVE_MENU, m); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.menus.IFocusService#removeTrackerFor(org.eclipse.swt.widgets.Control) |
| */ |
| public void removeFocusTracker(Control control) { |
| controlToId.remove(control); |
| if (control.isDisposed()) { |
| return; |
| } |
| control.removeFocusListener(getFocusListener()); |
| control.removeDisposeListener(getDisposeListener()); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.ISourceProvider#dispose() |
| */ |
| public void dispose() { |
| Iterator i = controlToId.keySet().iterator(); |
| while (i.hasNext()) { |
| Control c = (Control) i.next(); |
| if (!c.isDisposed()) { |
| c.removeFocusListener(getFocusListener()); |
| c.removeDisposeListener(getDisposeListener()); |
| } |
| } |
| controlToId.clear(); |
| controlToId = null; |
| focusListener = null; |
| disposeListener = null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.ISourceProvider#getCurrentState() |
| */ |
| public Map getCurrentState() { |
| Map m = new HashMap(); |
| if (currentId == null) { |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_ID_NAME, |
| IEvaluationContext.UNDEFINED_VARIABLE); |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_NAME, |
| IEvaluationContext.UNDEFINED_VARIABLE); |
| |
| } else { |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_ID_NAME, currentId); |
| m.put(ISources.ACTIVE_FOCUS_CONTROL_NAME, currentControl); |
| } |
| return m; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.ISourceProvider#getProvidedSourceNames() |
| */ |
| public String[] getProvidedSourceNames() { |
| return PROVIDED_SOURCE_NAMES; |
| } |
| } |