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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2013 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.linuxtools.tmf.ui.views.uml2sd.SDView;
  17 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  18
  19 /**
  20  * Action class implementation to move up in the sequence diagram view within a
  21  * page.
  22  *
  23  * @version 1.0
  24  * @author sveyrier
  25  */
  26 public class MoveSDUp extends Action {
  27
  28     // ------------------------------------------------------------------------
  29     // Constants
  30     // ------------------------------------------------------------------------
  31     /**
  32      * The action ID.
  33      */
  34     public final static String ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.MoveSDUp"; //$NON-NLS-1$
  35
  36     // ------------------------------------------------------------------------
  37     // Attributes
  38     // ------------------------------------------------------------------------
  39     /**
  40      * The sequence diagram view reference.
  41      */
  42     protected SDView fView = null;
  43
  44     // ------------------------------------------------------------------------
  45     // Constructors
  46     // ------------------------------------------------------------------------
  47     /**
  48      * Default constructor
  49      */
  50     public MoveSDUp() {
  51         this(null);
  52     }
  53
  54     /**
  55      * Constructor
  56      *
  57      * @param view a sequence diagram view reference
  58      */
  59     public MoveSDUp(SDView view) {
  60         super();
  61         setId(ID);
  62         setActionDefinitionId(ID);
  63         fView = view;
  64     }
  65
  66     // ------------------------------------------------------------------------
  67     // Methods
  68     // ------------------------------------------------------------------------
  69
  70     @Override
  71     public void run() {
  72         if (fView == null) {
  73             return;
  74         }
  75         SDWidget viewer = fView.getSDWidget();
  76
  77         if (viewer != null) {
  78             viewer.scrollBy(0, -viewer.getVisibleHeight());
  79         }
  80     }
  81
  82     /**
  83      * Sets the active SD view.
  84      * @param view The SD view.
  85      */
  86     public void setView(SDView view) {
  87         fView = view;
  88     }
  89 }