Java tutorial
/** * This file Copyright (c) 2005-2008 Aptana, Inc. This program is * dual-licensed under both the Aptana Public License and the GNU General * Public license. You may elect to use one or the other of these licenses. * * This program is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. Redistribution, except as permitted by whichever of * the GPL or APL you select, is prohibited. * * 1. For the GPL license (GPL), you can redistribute and/or modify this * program under the terms of the GNU General Public License, * Version 3, as published by the Free Software Foundation. You should * have received a copy of the GNU General Public License, Version 3 along * with this program; if not, write to the Free Software Foundation, Inc., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Aptana provides a special exception to allow redistribution of this file * with certain other free and open source software ("FOSS") code and certain additional terms * pursuant to Section 7 of the GPL. You may view the exception and these * terms on the web at http://www.aptana.com/legal/gpl/. * * 2. For the Aptana Public License (APL), this program and the * accompanying materials are made available under the terms of the APL * v1.0 which accompanies this distribution, and is available at * http://www.aptana.com/legal/apl/. * * You may view the GPL, Aptana's exception and additional terms, and the * APL in the file titled license.html at the root of the corresponding * plugin containing this source file. * * Any modifications to this file must keep this entire header intact. */ package com.aptana.ide.debug.internal.ui.actions; import org.eclipse.debug.core.DebugException; import org.eclipse.debug.ui.IDebugView; import org.eclipse.jface.action.IAction; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.widgets.Event; import org.eclipse.ui.IActionDelegate2; import org.eclipse.ui.IViewActionDelegate; import org.eclipse.ui.IViewPart; import com.aptana.ide.debug.core.model.IJSVariable; import com.aptana.ide.debug.internal.ui.IDebugUIConstants; import com.aptana.ide.debug.ui.DebugUiPlugin; /** * @author Max Stepanov */ public class ShowConstantsActionDelegate extends ViewerFilter implements IViewActionDelegate, IActionDelegate2 { private IViewPart fView; private IAction fAction; /** * @see org.eclipse.ui.IViewActionDelegate#init(org.eclipse.ui.IViewPart) */ public void init(IViewPart view) { fView = view; StructuredViewer viewer = getStructuredViewer(); ViewerFilter[] filters = viewer.getFilters(); ViewerFilter filter = null; for (int i = 0; i < filters.length; i++) { if (filters[i] == this) { filter = filters[i]; break; } } if (filter == null) { viewer.addFilter(this); } viewer.refresh(); fAction.setChecked(getPreferenceValue(view)); } /** * @see org.eclipse.ui.IActionDelegate2#dispose() */ public void dispose() { } /** * @see org.eclipse.ui.IActionDelegate2#init(org.eclipse.jface.action.IAction) */ public void init(IAction action) { fAction = action; } /** * @see org.eclipse.ui.IActionDelegate2#runWithEvent(org.eclipse.jface.action.IAction, * org.eclipse.swt.widgets.Event) */ public void runWithEvent(IAction action, Event event) { run(action); } /** * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction) */ public void run(IAction action) { IPreferenceStore store = getPreferenceStore(); String key = fView.getSite().getId() + "." + getPreferenceKey(); //$NON-NLS-1$ store.setValue(key, action.isChecked()); DebugUiPlugin.getDefault().savePluginPreferences(); getStructuredViewer().refresh(); } /** * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, * org.eclipse.jface.viewers.ISelection) */ public void selectionChanged(IAction action, ISelection selection) { } /** * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, * java.lang.Object) */ public boolean select(Viewer viewer, Object parentElement, Object element) { if (element instanceof IJSVariable) { try { if (!getValue()) { return !((IJSVariable) element).isConst(); } } catch (DebugException e) { DebugUiPlugin.log(e); } } return true; } /** * getPreferenceStore * * @return IPreferenceStore */ protected IPreferenceStore getPreferenceStore() { return DebugUiPlugin.getDefault().getPreferenceStore(); } /** * getPreferenceValue * * @param part * @return boolean */ protected boolean getPreferenceValue(IViewPart part) { String baseKey = getPreferenceKey(); String viewKey = part.getSite().getId(); String compositeKey = viewKey + "." + baseKey; //$NON-NLS-1$ IPreferenceStore store = getPreferenceStore(); boolean value = false; if (store.contains(compositeKey)) { value = store.getBoolean(compositeKey); } else { value = store.getBoolean(baseKey); } return value; } /** * getStructuredViewer * * @return StructuredViewer */ protected StructuredViewer getStructuredViewer() { IDebugView view = (IDebugView) fView.getAdapter(IDebugView.class); if (view != null) { Viewer viewer = view.getViewer(); if (viewer instanceof StructuredViewer) { return (StructuredViewer) viewer; } } return null; } /** * Returns whether this action is seleted/checked. * * @return whether this action is seleted/checked */ protected boolean getValue() { return fAction.isChecked(); } /** * getPreferenceKey * * @return String */ protected String getPreferenceKey() { return IDebugUIConstants.PREF_SHOW_CONSTANTS; } }