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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2008, 2011 IBM Corporation and others.
   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  * $Id: Zoom.java,v 1.3 2008/01/24 02:28:52 apnan Exp $
   8  *
   9  * Contributors:
  10  * IBM - Initial API and implementation
  11  * Bernd Hufmann - Updated for TMF
  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.tmf.ui.ITmfImageConstants;
  21 import org.eclipse.linuxtools.tmf.ui.TmfUiPlugin;
  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  * @author sveyrier
  32  *
  33  */
  34 public class Zoom extends Action {
  35
  36     // ------------------------------------------------------------------------
  37     // Attributes
  38     // ------------------------------------------------------------------------
  39     public final static String ZOOM_IN_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomInCoolBar"; //$NON-NLS-1$
  40     public final static String ZOOM_OUT_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ZoomOutCoolBar"; //$NON-NLS-1$
  41     public final static String RESET_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.ResetZoom"; //$NON-NLS-1$
  42     public final static String NO_ZOOM_ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.NoZoom"; //$NON-NLS-1$
  43
  44     protected SDView fView = null;
  45     protected boolean fLastZoomIn = false;
  46     protected boolean fLastZoomOut = false;
  47     protected boolean fLastZoom = true;
  48
  49     protected static Cursor fZoomInCursor = null;
  50     protected static Cursor fZoomOutCursor = null;
  51
  52     public static enum ZoomType {
  53         ZOOM_NONE, ZOOM_IN, ZOOM_OUT, ZOOM_RESET
  54     };
  55
  56     // ------------------------------------------------------------------------
  57     // Constructors
  58     // ------------------------------------------------------------------------
  59     public Zoom(SDView _view, ZoomType type) {
  60         super("", AS_RADIO_BUTTON);//$NON-NLS-1$
  61
  62         fView = _view;
  63
  64         if ((fZoomInCursor != null) && (!fZoomInCursor.isDisposed())) {
  65             fZoomInCursor.dispose();
  66         }
  67         if ((fZoomOutCursor != null) && (!fZoomOutCursor.isDisposed())) {
  68             fZoomOutCursor.dispose();
  69         }
  70
  71         // Pre-create zooming cursors
  72         fZoomInCursor = new Cursor(Display.getCurrent(),
  73                 TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_IN).getImageData(),
  74                 TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0);
  75
  76         fZoomOutCursor = new Cursor(Display.getCurrent(),
  77                 TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM_OUT).getImageData(),
  78                 TmfUiPlugin.getDefault().getImageFromImageRegistry(ITmfImageConstants.IMG_UI_ZOOM).getImageData(), 0, 0);
  79
  80         switch (type) {
  81         case ZOOM_IN:
  82             setText(SDMessages._47);
  83             setToolTipText(SDMessages._48);
  84             setId(ZOOM_IN_ID);
  85             setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_IN_MENU));
  86             break;
  87
  88         case ZOOM_OUT:
  89             setText(SDMessages._51);
  90             setToolTipText(SDMessages._52);
  91             setId(ZOOM_OUT_ID);
  92             setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_ZOOM_OUT_MENU));
  93             break;
  94
  95         case ZOOM_RESET:
  96             setText(SDMessages._49);
  97             setToolTipText(SDMessages._50);
  98             setId(RESET_ZOOM_ID);
  99             setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_HOME_MENU));
 100             break;
 101
 102         default:
 103             // ZoomType.NONE
 104             setText(SDMessages._53);
 105             setToolTipText(SDMessages._54);
 106             setId(NO_ZOOM_ID);
 107             setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_SELECT_MENU));
 108             break;
 109         }
 110     }
 111
 112     // ------------------------------------------------------------------------
 113     // Operations
 114     // ------------------------------------------------------------------------
 115     /*
 116      * (non-Javadoc)
 117      * @see org.eclipse.jface.action.Action#run()
 118      */
 119     @Override
 120     public void run() {
 121
 122         if ((fView == null) || (fView.getSDWidget() == null)) {
 123             return;
 124         }
 125
 126         SDWidget viewer = fView.getSDWidget();
 127
 128         if (getId().equals(ZOOM_OUT_ID)) {
 129             // Eclipse 3.0 M7 workaround
 130             if (fLastZoomOut == isChecked()) {
 131                 setChecked(!isChecked());
 132             }
 133
 134             viewer.setZoomOutMode(isChecked());
 135             fLastZoomOut = isChecked();
 136             fLastZoom = false;
 137             if (isChecked()) {
 138                 viewer.setCursor(fZoomOutCursor);
 139                 setActionChecked(NO_ZOOM_ID, false);
 140             } else {
 141                 viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 142                 setActionChecked(NO_ZOOM_ID, true);
 143             }
 144         } else if (getId().equals(ZOOM_IN_ID)) {
 145             // Eclipse 3.0 M7 workaround
 146             if (fLastZoomIn == isChecked()) {
 147                 setChecked(!isChecked());
 148             }
 149
 150             viewer.setZoomInMode(isChecked());
 151             fLastZoomIn = isChecked();
 152             fLastZoom = false;
 153             if (isChecked()) {
 154                 viewer.setCursor(fZoomInCursor);
 155                 setActionChecked(NO_ZOOM_ID, false);
 156             } else {
 157                 viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 158                 setActionChecked(NO_ZOOM_ID, true);
 159             }
 160         } else if (getId().equals(RESET_ZOOM_ID)) {
 161             viewer.resetZoomFactor();
 162
 163             // The reset action is a radio button only to uncheck the zoom in and out button
 164             // when it is clicked. This avoid adding code to do it manually
 165             // We only have to force it to false every time
 166             fLastZoom = false;
 167             setChecked(false);
 168             setActionChecked(NO_ZOOM_ID, true);
 169         } else if (getId().equals(NO_ZOOM_ID)) {
 170             setChecked(true);
 171             viewer.setZoomInMode(false);
 172             viewer.setZoomInMode(false);
 173             viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
 174         }
 175     }
 176
 177     /**
 178      * Set action check state of a view action for a given action ID.
 179      * @param id The action ID
 180      * @param checked true to check the action, false to uncheck the action
 181      */
 182     protected void setActionChecked(String id, boolean checked) {
 183         if (fView != null) {
 184             IActionBars bar = fView.getViewSite().getActionBars();
 185             if (bar == null) {
 186                 return;
 187             }
 188             IToolBarManager barManager = bar.getToolBarManager();
 189             if (barManager == null) {
 190                 return;
 191             }
 192             IContributionItem nextPage = barManager.find(id);
 193             if (nextPage != null && nextPage instanceof ActionContributionItem) {
 194                 IAction action = ((ActionContributionItem) nextPage).getAction();
 195                 if (action != null) {
 196                     action.setChecked(checked);
 197                 }
 198             }
 199         }
 200     }
 201 }