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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2014 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.tracecompass.tmf.ui.views.uml2sd.handlers;
  14
  15 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.SDView;
  16 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.SDWidget;
  17
  18 /**
  19  * Action class implementation to move up in the sequence diagram view within a
  20  * page.
  21  *
  22  * @version 1.0
  23  * @author sveyrier
  24  */
  25 public class MoveSDUp extends BaseSDAction {
  26
  27     // ------------------------------------------------------------------------
  28     // Constants
  29     // ------------------------------------------------------------------------
  30     /**
  31      * The action ID.
  32      */
  33     public static final String ID = "org.eclipse.linuxtools.tmf.ui.views.uml2sd.handlers.MoveSDUp"; //$NON-NLS-1$
  34
  35     // ------------------------------------------------------------------------
  36     // Constructors
  37     // ------------------------------------------------------------------------
  38     /**
  39      * Default constructor
  40      */
  41     public MoveSDUp() {
  42         this(null);
  43     }
  44
  45     /**
  46      * Constructor
  47      *
  48      * @param view a sequence diagram view reference
  49      */
  50     public MoveSDUp(SDView view) {
  51         super(view);
  52         setId(ID);
  53         setActionDefinitionId(ID);
  54     }
  55
  56     // ------------------------------------------------------------------------
  57     // Methods
  58     // ------------------------------------------------------------------------
  59
  60     @Override
  61     public void run() {
  62         if (getView() == null) {
  63             return;
  64         }
  65         SDWidget viewer = getView().getSDWidget();
  66
  67         if (viewer != null) {
  68             viewer.scrollBy(0, -viewer.getVisibleHeight());
  69         }
  70     }
  71 }