org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/uml2sd/handlers/ShowNodeStart.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 java.util.Iterator;
  17
  18 import org.eclipse.jface.action.Action;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.jface.viewers.ISelectionProvider;
  21 import org.eclipse.jface.viewers.StructuredSelection;
  22 import org.eclipse.linuxtools.internal.tmf.ui.ITmfImageConstants;
  23 import org.eclipse.linuxtools.internal.tmf.ui.TmfUiPlugin;
  24 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView;
  25 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  26 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.core.GraphNode;
  27 import org.eclipse.ui.IViewPart;
  28
  29 /**
  30  * Action class implementation to show end of a graph node.
  31  *
  32  * @version 1.0
  33  * @author sveyrier
  34  */
  35 public class ShowNodeStart extends Action {
  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 ShowNodeStart() {
  52         this(null);
  53     }
  54
  55     /**
  56      * Constructor
  57      *
  58      * @param _view The sequence diagram view reference
  59      */
  60     public ShowNodeStart(IViewPart _view) {
  61         super();
  62         if (_view instanceof SDView) {
  63             fView = (SDView)_view;
  64         }
  65         setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_NODE_START));
  66     }
  67
  68     // ------------------------------------------------------------------------
  69     // Methods
  70     // ------------------------------------------------------------------------
  71     /*
  72      * (non-Javadoc)
  73      * @see org.eclipse.jface.action.Action#run()
  74      */
  75    @Override
  76     @SuppressWarnings("rawtypes")
  77     public void run() {
  78         if (fView == null) {
  79             return;
  80         }
  81
  82         SDWidget sdWidget = fView.getSDWidget();
  83
  84         if (sdWidget == null) {
  85             return;
  86         }
  87
  88         ISelectionProvider selProvider = sdWidget.getSelectionProvider();
  89         ISelection sel = selProvider.getSelection();
  90         Object selectedNode = null;
  91         Iterator it = ((StructuredSelection) sel).iterator();
  92         while (it.hasNext()) {
  93             selectedNode = it.next();
  94         }
  95         if (selectedNode != null) {
  96             GraphNode node = (GraphNode) selectedNode;
  97             if (node.getX() * sdWidget.getZoomFactor() < sdWidget.getContentsX() + sdWidget.getVisibleWidth() / 2) {
  98                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() - sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  99             } else {
 100                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() + sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
 101             }
 102         }
 103     }
 104
 105    /**
 106     * Sets the active SD view.
 107     *
 108     * @param view The SD view.
 109     */
 110   public void setView(SDView view) {
 111        fView = view;
 112    }
 113 }