org.eclipse.tracecompass.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.viewers.ISelection;
  18 import org.eclipse.jface.viewers.ISelectionProvider;
  19 import org.eclipse.jface.viewers.StructuredSelection;
  20 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  21 import org.eclipse.linuxtools.internal.tmf.ui.ITmfImageConstants;
  22 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDView;
  23 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
  24 import org.eclipse.linuxtools.tmf.ui.views.uml2sd.core.GraphNode;
  25
  26 /**
  27  * Action class implementation to show end of a graph node.
  28  *
  29  * @version 1.0
  30  * @author sveyrier
  31  */
  32 public class ShowNodeStart extends BaseSDAction {
  33
  34     // ------------------------------------------------------------------------
  35     // Constructors
  36     // ------------------------------------------------------------------------
  37
  38     /**
  39      * Default constructor
  40      */
  41     public ShowNodeStart() {
  42         this(null);
  43     }
  44
  45     /**
  46      * Constructor
  47      *
  48      * @param view
  49      *            The sequence diagram view reference
  50      * @since 2.0
  51      */
  52     public ShowNodeStart(SDView view) {
  53         super(view);
  54         setImageDescriptor(Activator.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_NODE_START));
  55     }
  56
  57     // ------------------------------------------------------------------------
  58     // Methods
  59     // ------------------------------------------------------------------------
  60
  61     @Override
  62     public void run() {
  63         if (getView() == null) {
  64             return;
  65         }
  66
  67         SDWidget sdWidget = getView().getSDWidget();
  68
  69         if (sdWidget == null) {
  70             return;
  71         }
  72
  73         ISelectionProvider selProvider = sdWidget.getSelectionProvider();
  74         ISelection sel = selProvider.getSelection();
  75         Object selectedNode = null;
  76         Iterator<Object> it = ((StructuredSelection) sel).iterator();
  77         while (it.hasNext()) {
  78             selectedNode = it.next();
  79         }
  80         if (selectedNode != null) {
  81             GraphNode node = (GraphNode) selectedNode;
  82             if (node.getX() * sdWidget.getZoomFactor() < sdWidget.getContentsX() + sdWidget.getVisibleWidth() / 2) {
  83                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() - sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  84             } else {
  85                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() + sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  86             }
  87         }
  88     }
  89 }