org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/uml2sd/handlers/Zoom.java

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2012 IBM Corporation, Ericsson
   3  * All rights reserved.   This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM - Initial API and implementation
  10  *     Bernd Hufmann - Updated for TMF
  11  **********************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers;
  14
  15 import org.eclipse.jface.action.Action;
  16 import org.eclipse.jface.action.ActionContributionItem;
  17 import org.eclipse.jface.action.IAction;
  18 import org.eclipse.jface.action.IContributionItem;
  19 import org.eclipse.jface.action.IToolBarManager;
  20 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  21 import org.eclipse.linuxtools.internal.tmf.ui.ITmfImageConstants;
  22 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView;
  23 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  24 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.util.SDMessages;
  25 import org.eclipse.swt.SWT;
  26 import org.eclipse.swt.graphics.Cursor;
  27 import org.eclipse.swt.widgets.Display;
  28 import org.eclipse.ui.IActionBars;
  29
  30 /**
  31  * Action class implementation for zooming in, out or reset of zoom.
  32  *
  33  * @version 1.0
  34  * @author sveyrier
  35  *
  36  */
  37 public class Zoom extends Action {
  38
  39     // ------------------------------------------------------------------------
  40     // Constants
  41     // ------------------------------------------------------------------------
  42     /**
  43      * The Action ID for zooming in.
  44      */
  45     public final static String ZOOM_IN_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomInCoolBar"; //$NON-NLS-1$
  46     /**
  47      * The Action ID for zooming out.
  48      */
  49     public final static String ZOOM_OUT_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomOutCoolBar"; //$NON-NLS-1$
  50     /**
  51      * The Action ID for reset zooming.
  52      */
  53     public final static String RESET_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ResetZoom"; //$NON-NLS-1$
  54     /**
  55      * The Action ID for no zoominf.
  56      */
  57     public final static String NO_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.NoZoom"; //$NON-NLS-1$
  58
  59     // ------------------------------------------------------------------------
  60     // Attributes
  61     // ------------------------------------------------------------------------
  62     /**
  63      * The sequence diagram view reference
  64      */
  65     protected SDView fView = null;
  66     /**
  67      * Flag to indicate last zoom in.
  68      */
  69     protected boolean fLastZoomIn = false;
  70     /**
  71      * Flag to indicate last zoom out.
  72      */
  73     protected boolean fLastZoomOut = false;
  74     /**
  75      * Flag to indicate last zoom.
  76      */
  77     protected boolean fLastZoom = true;
  78     /**
  79      * The cursor used when zooming in.
  80      */
  81     private final Cursor fZoomInCursor;
  82     /**
  83      * The cursor used when zooming out.
  84      */
  85     private final Cursor fZoomOutCursor;
  86
  87     /**
  88      * The different zoom actions
  89      */
  90     public static enum ZoomType {
  91         /** No zoom information */
  92         ZOOM_NONE,
  93         /** Zoom in */
  94         ZOOM_IN,
  95         /** Zoom out */
  96         ZOOM_OUT,
  97         /** Reset to the default zoom level */
  98         ZOOM_RESET
  99     }
 100
 101     // ------------------------------------------------------------------------
 102     // Constructors
 103     // ------------------------------------------------------------------------
 104
 105     /**
 106      * Constructor
 107      * @param view The view reference
 108      * @param type The type of zoom.
 109      */
 110     public Zoom(SDView view, ZoomType type) {
 111         super("", AS_RADIO_BUTTON);//$NON-NLS-1$
 112
 113         fView = view;
 114
 115         // Pre-create zooming cursors
 116         fZoomInCursor = new Cursor(Display.getCurrent(),
 117                 Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_IN).getImageData(),
 118                 Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0);
 119
 120         fZoomOutCursor = new Cursor(Display.getCurrent(),
 121                 Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_OUT).getImageData(),
 122                 Activator.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0);
 123
 124         switch (type) {
 125         case ZOOM_IN:
 126             setText(SDMessages._47);
 127             setToolTipText(SDMessages._48);
 128             setId(ZOOM_IN_ID);
 129             setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_IN_MENU));
 130             break;
 131
 132         case ZOOM_OUT:
 133             setText(SDMessages._51);
 134             setToolTipText(SDMessages._52);
 135             setId(ZOOM_OUT_ID);
 136             setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_OUT_MENU));
 137             break;
 138
 139         case ZOOM_RESET:
 140             setText(SDMessages._49);
 141             setToolTipText(SDMessages._50);
 142             setId(RESET_ZOOM_ID);
 143             setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_HOME_MENU));
 144             break;
 145
 146         case ZOOM_NONE:
 147         default:
 148             setText(SDMessages._53);
 149             setToolTipText(SDMessages._54);
 150             setId(NO_ZOOM_ID);
 151             setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_SELECT_MENU));
 152             break;
 153         }
 154     }
 155
 156     // ------------------------------------------------------------------------
 157     // Methods
 158     // ------------------------------------------------------------------------
 159     /*
 160      * (non-Javadoc)
 161      * @see org.eclipse.jface.action.Action#run()
 162      */
 163     @Override
 164     public void run() {
 165
 166         if ((fView == null) || (fView.getSDWidget() == null)) {
 167             return;
 168         }
 169
 170         SDWidget viewer = fView.getSDWidget();
 171
 172         if (getId().equals(ZOOM_OUT_ID)) {
 173             // Eclipse 3.0 M7 workaround
 174             if (fLastZoomOut == isChecked()) {
 175                 setChecked(!isChecked());
 176             }
 177
 178             viewer.setZoomOutMode(isChecked());
 179             fLastZoomOut = isChecked();
 180             fLastZoom = false;
 181             if (isChecked()) {
 182                 viewer.setCursor(fZoomOutCursor);
 183                 setActionChecked(NO_ZOOM_ID, false);
 184             } else {
 185                 viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 186                 setActionChecked(NO_ZOOM_ID, true);
 187             }
 188         } else if (getId().equals(ZOOM_IN_ID)) {
 189             // Eclipse 3.0 M7 workaround
 190             if (fLastZoomIn == isChecked()) {
 191                 setChecked(!isChecked());
 192             }
 193
 194             viewer.setZoomInMode(isChecked());
 195             fLastZoomIn = isChecked();
 196             fLastZoom = false;
 197             if (isChecked()) {
 198                 viewer.setCursor(fZoomInCursor);
 199                 setActionChecked(NO_ZOOM_ID, false);
 200             } else {
 201                 viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 202                 setActionChecked(NO_ZOOM_ID, true);
 203             }
 204         } else if (getId().equals(RESET_ZOOM_ID)) {
 205             viewer.resetZoomFactor();
 206
 207             // The reset action is a radio button only to uncheck the zoom in and out button
 208             // when it is clicked. This avoid adding code to do it manually
 209             // We only have to force it to false every time
 210             fLastZoom = false;
 211             setChecked(false);
 212             setActionChecked(NO_ZOOM_ID, true);
 213         } else if (getId().equals(NO_ZOOM_ID)) {
 214             setChecked(true);
 215             viewer.setZoomInMode(false);
 216             viewer.setZoomInMode(false);
 217             viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 218         }
 219     }
 220
 221     /**
 222      * Set action check state of a view action for a given action ID.
 223      *
 224      * @param id The action ID
 225      * @param checked true to check the action, false to uncheck the action
 226      */
 227     protected void setActionChecked(String id, boolean checked) {
 228         if (fView != null) {
 229             IActionBars bar = fView.getViewSite().getActionBars();
 230             if (bar == null) {
 231                 return;
 232             }
 233             IToolBarManager barManager = bar.getToolBarManager();
 234             if (barManager == null) {
 235                 return;
 236             }
 237             IContributionItem nextPage = barManager.find(id);
 238             if (nextPage instanceof ActionContributionItem) {
 239                 IAction action = ((ActionContributionItem) nextPage).getAction();
 240                 if (action != null) {
 241                     action.setChecked(checked);
 242                 }
 243             }
 244         }
 245     }
 246 }