Java tutorial
/********************************************************************** * Copyright (c) 2005, 2013 IBM Corporation, Ericsson * 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 - Initial API and implementation * Bernd Hufmann - Updated for TMF **********************************************************************/ package fr.inria.linuxtools.tmf.ui.views.uml2sd.handlers; 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.swt.SWT; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IActionBars; import fr.inria.linuxtools.internal.tmf.ui.Activator; import fr.inria.linuxtools.internal.tmf.ui.ITmfImageConstants; import fr.inria.linuxtools.tmf.ui.views.uml2sd.SDView; import fr.inria.linuxtools.tmf.ui.views.uml2sd.SDWidget; import fr.inria.linuxtools.tmf.ui.views.uml2sd.util.Messages; /** * Action class implementation for zooming in, out or reset of zoom. * * @version 1.0 * @author sveyrier * */ public class Zoom extends BaseSDAction { // ------------------------------------------------------------------------ // Constants // ------------------------------------------------------------------------ /** * The Action ID for zooming in. */ public static final String ZOOM_IN_ID = "fr.inria.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomInCoolBar"; //$NON-NLS-1$ /** * The Action ID for zooming out. */ public static final String ZOOM_OUT_ID = "fr.inria.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomOutCoolBar"; //$NON-NLS-1$ /** * The Action ID for reset zooming. */ public static final String RESET_ZOOM_ID = "fr.inria.linuxtools.tmf.ui.views.uml2sd.handlers.ResetZoom"; //$NON-NLS-1$ /** * The Action ID for no zoominf. */ public static final String NO_ZOOM_ID = "fr.inria.linuxtools.tmf.ui.views.uml2sd.handlers.NoZoom"; //$NON-NLS-1$ // ------------------------------------------------------------------------ // Attributes // ------------------------------------------------------------------------ /** * Flag to indicate last zoom in. */ private boolean fLastZoomIn = false; /** * Flag to indicate last zoom out. */ private boolean fLastZoomOut = false; /** * The cursor used when zooming in. */ private final Cursor fZoomInCursor; /** * The cursor used when zooming out. */ private final Cursor fZoomOutCursor; /** * The different zoom actions */ public static enum ZoomType { /** No zoom information */ ZOOM_NONE, /** Zoom in */ ZOOM_IN, /** Zoom out */ ZOOM_OUT, /** Reset to the default zoom level */ ZOOM_RESET } // ------------------------------------------------------------------------ // Constructors // ------------------------------------------------------------------------ /** * Constructor * @param view The view reference * @param type The type of zoom. */ public Zoom(SDView view, ZoomType type) { super(view, "", AS_RADIO_BUTTON); //$NON-NLS-1$ // Pre-create zooming cursors fZoomInCursor = new Cursor(Display.getCurrent(), Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_IN).getImageData(), Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0); fZoomOutCursor = new Cursor(Display.getCurrent(), Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_OUT).getImageData(), Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0); switch (type) { case ZOOM_IN: setText(Messages.SequenceDiagram_ZoomIn); setToolTipText(Messages.SequenceDiagram_ZoomInTheDiagram); setId(ZOOM_IN_ID); setImageDescriptor( Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_IN_MENU)); break; case ZOOM_OUT: setText(Messages.SequenceDiagram_ZoomOut); setToolTipText(Messages.SequenceDiagram_ZoomOutTheDiagram); setId(ZOOM_OUT_ID); setImageDescriptor( Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_OUT_MENU)); break; case ZOOM_RESET: setText(Messages.SequenceDiagram_ResetZoomFactor); setToolTipText(Messages.SequenceDiagram_ResetZoomFactor); setId(RESET_ZOOM_ID); setImageDescriptor( Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_HOME_MENU)); break; case ZOOM_NONE: default: setText(Messages.SequenceDiagram_Select); setToolTipText(Messages.SequenceDiagram_Select); setId(NO_ZOOM_ID); setImageDescriptor( Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_SELECT_MENU)); break; } } // ------------------------------------------------------------------------ // Methods // ------------------------------------------------------------------------ @Override public void run() { if ((getView() == null) || (getView().getSDWidget() == null)) { return; } SDWidget viewer = getView().getSDWidget(); if (getId().equals(ZOOM_OUT_ID)) { // Eclipse 3.0 M7 workaround if (fLastZoomOut == isChecked()) { setChecked(!isChecked()); } viewer.setZoomOutMode(isChecked()); fLastZoomOut = isChecked(); 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(); 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 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 (getView() != null) { IActionBars bar = getView().getViewSite().getActionBars(); if (bar == null) { return; } IToolBarManager barManager = bar.getToolBarManager(); if (barManager == null) { return; } IContributionItem nextPage = barManager.find(id); if (nextPage instanceof ActionContributionItem) { IAction action = ((ActionContributionItem) nextPage).getAction(); if (action != null) { action.setChecked(checked); } } } } }