Java tutorial
/********************************************************************** * Copyright (c) 2005, 2008, 2011 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 * $Id: Zoom.java,v 1.3 2008/01/24 02:28:52 apnan Exp $ * * Contributors: * IBM - Initial API and implementation * Bernd Hufmann - Updated for TMF **********************************************************************/ package org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.ActionContributionItem; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IContributionItem; import org.eclipse.jface.action.IToolBarManager; import org.eclipse.linuxtools.tmf.ui.ITmfImageConstants; import org.eclipse.linuxtools.tmf.ui.TmfUiPlugin; import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView; import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget; import org.eclipse.linuxtools.tmf.ui.views.uml2sd.util.SDMessages; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IActionBars; /** * @author sveyrier * */ public class Zoom extends Action { // ------------------------------------------------------------------------ // Attributes // ------------------------------------------------------------------------ public final static String ZOOM_IN_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomInCoolBar"; //$NON-NLS-1$ public final static String ZOOM_OUT_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomOutCoolBar"; //$NON-NLS-1$ public final static String RESET_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ResetZoom"; //$NON-NLS-1$ public final static String NO_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.NoZoom"; //$NON-NLS-1$ protected SDView fView = null; protected boolean fLastZoomIn = false; protected boolean fLastZoomOut = false; protected boolean fLastZoom = true; private static Cursor fZoomInCursor; private static Cursor fZoomOutCursor; public static enum ZoomType { ZOOM_NONE, ZOOM_IN, ZOOM_OUT, ZOOM_RESET }; // ------------------------------------------------------------------------ // Constructors // ------------------------------------------------------------------------ public Zoom(SDView _view, ZoomType type) { super("", AS_RADIO_BUTTON);//$NON-NLS-1$ fView = _view; if ((fZoomInCursor != null) && (!fZoomInCursor.isDisposed())) { fZoomInCursor.dispose(); } if ((fZoomOutCursor != null) && (!fZoomOutCursor.isDisposed())) { fZoomOutCursor.dispose(); } // Pre-create zooming cursors fZoomInCursor = new Cursor(Display.getCurrent(), TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_IN) .getImageData(), TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0); fZoomOutCursor = new Cursor(Display.getCurrent(), TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_OUT) .getImageData(), TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0); switch (type) { case ZOOM_IN: setText(SDMessages._47); setToolTipText(SDMessages._48); setId(ZOOM_IN_ID); setImageDescriptor( TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_IN_MENU)); break; case ZOOM_OUT: setText(SDMessages._51); setToolTipText(SDMessages._52); setId(ZOOM_OUT_ID); setImageDescriptor( TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_OUT_MENU)); break; case ZOOM_RESET: setText(SDMessages._49); setToolTipText(SDMessages._50); setId(RESET_ZOOM_ID); setImageDescriptor( TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_HOME_MENU)); break; default: // ZoomType.NONE setText(SDMessages._53); setToolTipText(SDMessages._54); setId(NO_ZOOM_ID); setImageDescriptor( TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_SELECT_MENU)); break; } } // ------------------------------------------------------------------------ // Operations // ------------------------------------------------------------------------ /* * (non-Javadoc) * @see org.eclipse.jface.action.Action#run() */ @Override public void run() { if ((fView == null) || (fView.getSDWidget() == null)) { return; } SDWidget viewer = fView.getSDWidget(); if (getId().equals(ZOOM_OUT_ID)) { // Eclipse 3.0 M7 workaround if (fLastZoomOut == isChecked()) { setChecked(!isChecked()); } viewer.setZoomOutMode(isChecked()); fLastZoomOut = isChecked(); fLastZoom = false; if (isChecked()) { viewer.setCursor(fZoomOutCursor); setActionChecked(NO_ZOOM_ID, false); } else { viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW)); setActionChecked(NO_ZOOM_ID, true); } } else if (getId().equals(ZOOM_IN_ID)) { // Eclipse 3.0 M7 workaround if (fLastZoomIn == isChecked()) { setChecked(!isChecked()); } viewer.setZoomInMode(isChecked()); fLastZoomIn = isChecked(); fLastZoom = false; if (isChecked()) { viewer.setCursor(fZoomInCursor); setActionChecked(NO_ZOOM_ID, false); } else { viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW)); setActionChecked(NO_ZOOM_ID, true); } } else if (getId().equals(RESET_ZOOM_ID)) { viewer.resetZoomFactor(); // The reset action is a radio button only to uncheck the zoom in and out button // when it is clicked. This avoid adding code to do it manually // We only have to force it to false every time fLastZoom = false; setChecked(false); setActionChecked(NO_ZOOM_ID, true); } else if (getId().equals(NO_ZOOM_ID)) { setChecked(true); viewer.setZoomInMode(false); viewer.setZoomInMode(false); viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW)); } } /** * Set action check state of a view action for a given action ID. * @param id The action ID * @param checked true to check the action, false to uncheck the action */ protected void setActionChecked(String id, boolean checked) { if (fView != null) { IActionBars bar = fView.getViewSite().getActionBars(); if (bar == null) { return; } IToolBarManager barManager = bar.getToolBarManager(); if (barManager == null) { return; } IContributionItem nextPage = barManager.find(id); if (nextPage != null && nextPage instanceof ActionContributionItem) { IAction action = ((ActionContributionItem) nextPage).getAction(); if (action != null) { action.setChecked(checked); } } } } }