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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2006 IBM Corporation and others.
   3  * Copyright (c) 2011, 2012 Ericsson.
   4  *
   5  * All rights reserved.   This program and the accompanying materials
   6  * are made available under the terms of the Eclipse Public License v1.0
   7  * which accompanies this distribution, and is available at
   8  * http://www.eclipse.org/legal/epl-v10.html
   9  *
  10  * Contributors:
  11  * IBM - Initial API and implementation
  12  * Bernd Hufmann - Updated for TMF
  13  **********************************************************************/
  14 package org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers;
  15
  16 import org.eclipse.jface.action.Action;
  17 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView;
  18 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  19
  20 /**
  21  * Action class implementation to move up in the sequence diagram view within a
  22  * page.
  23  *
  24  * @version 1.0
  25  * @author sveyrier
  26  */
  27 public class MoveSDUp extends Action {
  28
  29     // ------------------------------------------------------------------------
  30     // Constants
  31     // ------------------------------------------------------------------------
  32     /**
  33      * The action ID.
  34      */
  35     public final static String ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.MoveSDUp"; //$NON-NLS-1$
  36
  37     // ------------------------------------------------------------------------
  38     // Attributes
  39     // ------------------------------------------------------------------------
  40     /**
  41      * The sequence diagram view reference.
  42      */
  43     protected SDView fView = null;
  44
  45     // ------------------------------------------------------------------------
  46     // Constructors
  47     // ------------------------------------------------------------------------
  48     /**
  49      * Default constructor
  50      */
  51     public MoveSDUp() {
  52         this(null);
  53     }
  54
  55     /**
  56      * Constructor
  57      *
  58      * @param view a sequence diagram view reference
  59      */
  60     public MoveSDUp(SDView view) {
  61         super();
  62         setId(ID);
  63         setActionDefinitionId(ID);
  64         fView = view;
  65     }
  66
  67     // ------------------------------------------------------------------------
  68     // Methods
  69     // ------------------------------------------------------------------------
  70     /*
  71      * (non-Javadoc)
  72      * @see org.eclipse.jface.action.Action#run()
  73      */
  74     @Override
  75     public void run() {
  76         if (fView == null) {
  77             return;
  78         }
  79         SDWidget viewer = fView.getSDWidget();
  80
  81         if (viewer != null) {
  82             viewer.scrollBy(0, -viewer.getVisibleHeight());
  83         }
  84     }
  85
  86     /**
  87      * Sets the active SD view.
  88      * @param view The SD view.
  89      */
  90     public void setView(SDView view) {
  91         fView = view;
  92     }
  93 }