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

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2006, 2011 IBM Corporation and others.
   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  * $Id: ShowNodeStart.java,v 1.3 2006/09/20 20:56:26 ewchan Exp $
   8  *
   9  * Contributors:
  10  * IBM - Initial API and implementation
  11  * Bernd Hufmann - Updated for TMF
  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.TmfUiPlugin;
  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  * @author sveyrier
  30  */
  31 public class ShowNodeStart extends Action {
  32
  33     // ------------------------------------------------------------------------
  34     // Attributes
  35     // ------------------------------------------------------------------------
  36     protected SDView fView = null;
  37
  38     // ------------------------------------------------------------------------
  39     // Constructors
  40     // ------------------------------------------------------------------------
  41     public ShowNodeStart() {
  42         this(null);
  43     }
  44
  45     public ShowNodeStart(IViewPart _view) {
  46         super();
  47         if (_view instanceof SDView) {
  48             fView = (SDView)_view;
  49         }
  50         setImageDescriptor(TmfUiPlugin.getDefault().getImageDescripterFromPath(ITmfImageConstants.IMG_UI_NODE_START));
  51     }
  52
  53     // ------------------------------------------------------------------------
  54     // Operations
  55     // ------------------------------------------------------------------------
  56     /*
  57      * (non-Javadoc)
  58      * @see org.eclipse.jface.action.Action#run()
  59      */
  60    @Override
  61     @SuppressWarnings("rawtypes")
  62     public void run() {
  63         if (fView == null)
  64             return;
  65         SDWidget sdWidget = fView.getSDWidget();
  66
  67         if (sdWidget == null) {
  68             return;
  69         }
  70
  71         ISelectionProvider selProvider = sdWidget.getSelectionProvider();
  72         ISelection sel = selProvider.getSelection();
  73         Object selectedNode = null;
  74         Iterator it = ((StructuredSelection) sel).iterator();
  75         while (it.hasNext())
  76             selectedNode = it.next();
  77         if (selectedNode != null) {
  78             GraphNode node = (GraphNode) selectedNode;
  79             if (node.getX() * sdWidget.getZoomFactor() < sdWidget.getContentsX() + sdWidget.getVisibleWidth() / 2)
  80                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() - sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  81             else
  82                 sdWidget.ensureVisible(Math.round(node.getX() * sdWidget.getZoomFactor() + sdWidget.getVisibleWidth() / (float) 2), Math.round(node.getY() * sdWidget.getZoomFactor()));
  83         }
  84     }
  85
  86    public void setView(SDView view) {
  87        fView = view;
  88    }
  89 }