bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/SingleClickStartEditMouseListener.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.browsing.ui.swt;
  13
  14 import org.eclipse.jface.viewers.IFilter;
  15 import org.eclipse.swt.events.MouseAdapter;
  16 import org.eclipse.swt.events.MouseEvent;
  17 import org.eclipse.swt.graphics.Point;
  18 import org.eclipse.swt.widgets.Tree;
  19 import org.eclipse.swt.widgets.TreeItem;
  20 import org.simantics.browsing.ui.Column;
  21 import org.simantics.browsing.ui.GraphExplorer;
  22 import org.simantics.browsing.ui.NodeContext;
  23
  24 /**
  25  * @author Tuukka Lehtonen
  26  */
  27 public class SingleClickStartEditMouseListener extends MouseAdapter {
  28
  29     public static final IFilter BUTTON1_FIRST_DOWN_FILTER = new IFilter() {
  30         @Override
  31         public boolean select(Object toTest) {
  32             MouseEvent e = (MouseEvent) toTest;
  33             return e.button == 1 && e.count == 1;
  34         }
  35     };
  36
  37     private GraphExplorer explorer;
  38     private IFilter       eventFilter;
  39     private Tree          tree;
  40     private Column[]      columns;
  41
  42     public static SingleClickStartEditMouseListener attachWithSingleLeftDown(GraphExplorer explorer) {
  43         return attachTo(explorer, BUTTON1_FIRST_DOWN_FILTER);
  44     }
  45
  46     public static SingleClickStartEditMouseListener attachTo(GraphExplorer explorer, IFilter eventFilter) {
  47         SingleClickStartEditMouseListener l = new SingleClickStartEditMouseListener(explorer, eventFilter);
  48         explorer.addListener(l);
  49         return l;
  50     }
  51
  52     public SingleClickStartEditMouseListener(GraphExplorer explorer, IFilter eventFilter) {
  53         if (explorer == null)
  54             throw new NullPointerException("null explorer");
  55
  56         this.explorer = explorer;
  57         this.eventFilter = eventFilter;
  58         this.tree = (Tree) explorer.getControl();
  59         this.columns = explorer.getColumns();
  60     }
  61
  62     @Override
  63     public void mouseDown(MouseEvent e) {
  64         if (eventFilter != null && !eventFilter.select(e))
  65             return;
  66
  67         Point point = new Point(e.x, e.y);
  68         TreeItem item = tree.getItem(point);
  69         if (item == null)
  70             return;
  71
  72         NodeContext ctx = (NodeContext) item.getData();
  73         if (ctx == null)
  74             return;
  75
  76         int columnCount = tree.getColumnCount();
  77         for (int i = 0; i < columnCount && i < columns.length; i++) {
  78             if (!item.isDisposed() && item.getBounds(i).contains(point)) {
  79                 explorer.startEditing(ctx, columns[i].getKey());
  80             }
  81         }
  82     }
  83
  84 }