org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/uml2sd/handlers/ShowNodeStart.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 java.util.Iterator;
  16
  17 import org.eclipse.jface.action.Action;
  18 import org.eclipse.jface.viewers.ISelection;
  19 import org.eclipse.jface.viewers.ISelectionProvider;
  20 import org.eclipse.jface.viewers.StructuredSelection;
  21 import org.eclipse.linuxtools.internal.tmf.ui.ITmfImageConstants;
  22 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  23 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView;
  24 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  25 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.core.GraphNode;
  26 import org.eclipse.ui.IViewPart;
  27
  28 /**
  29  * Action class implementation to show end of a graph node.
  30  *
  31  * @version 1.0
  32  * @author sveyrier
  33  */
  34 public class ShowNodeStart extends Action {
  35
  36     // ------------------------------------------------------------------------
  37     // Attributes
  38     // ------------------------------------------------------------------------
  39
  40     /**
  41      * The sequence diagram view reference
  42      */
  43     protected SDView fView = null;
  44
  45     // ------------------------------------------------------------------------
  46     // Constructors
  47     // ------------------------------------------------------------------------
  48
  49     /**
  50      * Default constructor
  51      */
  52     public ShowNodeStart() {
  53         this(null);
  54     }
  55
  56     /**
  57      * Constructor
  58      *
  59      * @param view
  60      *            The sequence diagram view reference
  61      */
  62     public ShowNodeStart(IViewPart view) {
  63         super();
  64         if (view instanceof SDView) {
  65             fView = (SDView) view;
  66         }
  67         setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_NODE_START));
  68     }
  69
  70     // ------------------------------------------------------------------------
  71     // Methods
  72     // ------------------------------------------------------------------------
  73
  74     @Override
  75     @SuppressWarnings("rawtypes")
  76     public void run() {
  77         if (fView == null) {
  78             return;
  79         }
  80
  81         SDWidget sdWidget = fView.getSDWidget();
  82
  83         if (sdWidget == null) {
  84             return;
  85         }
  86
  87         ISelectionProvider selProvider = sdWidget.getSelectionProvider();
  88         ISelection sel = selProvider.getSelection();
  89         Object selectedNode = null;
  90         Iterator it = ((StructuredSelection) sel).iterator();
  91         while (it.hasNext()) {
  92             selectedNode = it.next();
  93         }
  94         if (selectedNode != null) {
  95             GraphNode node = (GraphNode) selectedNode;
  96             if (node.getX() * sdWidget.getZoomFactor() < sdWidget.getContentsX() + sdWidget.getVisibleWidth() / 2) {
  97                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() - sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  98             } else {
  99                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() + sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
 100             }
 101         }
 102     }
 103
 104     /**
 105      * Sets the active SD view.
 106      *
 107      * @param view
 108      *            The SD view.
 109      */
 110     public void setView(SDView view) {
 111         fView = view;
 112     }
 113 }