bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/Scale.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 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  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.browsing.ui.swt.widgets;
  13
  14 import java.util.concurrent.CopyOnWriteArrayList;
  15
  16 import org.eclipse.swt.events.SelectionListener;
  17 import org.eclipse.swt.widgets.Composite;
  18 import org.eclipse.swt.widgets.Control;
  19 import org.eclipse.swt.widgets.Display;
  20 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;
  21 import org.simantics.browsing.ui.swt.widgets.impl.Widget;
  22 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;
  23 import org.simantics.db.management.ISessionContext;
  24 import org.simantics.db.procedure.Listener;
  25
  26 public class Scale extends WidgetImpl {
  27
  28     private ReadFactory<?, Integer> selectionFactory;
  29     private final CopyOnWriteArrayList<SelectionListener> selectionListeners = new CopyOnWriteArrayList<SelectionListener>();
  30
  31     final private Display display;
  32     final private org.eclipse.swt.widgets.Scale scale;
  33
  34     public Scale(Composite parent, WidgetSupport support, int style) {
  35         super(support);
  36         this.display = parent.getDisplay();
  37         scale = new org.eclipse.swt.widgets.Scale(parent, style);
  38         scale.setData("org.simantics.browsing.ui.widgets.Scale", this);
  39         support.register(this);
  40     }
  41
  42     public void setSelectionFactory(ReadFactory<?, Integer> selectionFactory) {
  43         this.selectionFactory = selectionFactory;
  44     }
  45
  46     public org.eclipse.swt.widgets.Scale getWidget() {
  47         return scale;
  48     }
  49
  50     @Override
  51     public Control getControl() {
  52         return scale;
  53     }
  54
  55     @Override
  56     public void setInput(ISessionContext context, Object input) {
  57
  58         if (selectionListeners != null) {
  59             for (SelectionListener listener : selectionListeners) {
  60                 if(listener instanceof Widget) {
  61                     ((Widget) listener).setInput(context, input);
  62                 }
  63             }
  64         }
  65
  66         if(selectionFactory != null) {
  67             selectionFactory.listen(context, input, new Listener<Integer>() {
  68
  69                 @Override
  70                 public void exception(Throwable t) {
  71                     t.printStackTrace();
  72                 }
  73
  74                 @Override
  75                 public void execute(final Integer selection) {
  76                     if(isDisposed()) return;
  77                     display.asyncExec(new Runnable() {
  78
  79                         @Override
  80                         public void run() {
  81                             if(isDisposed()) return;
  82                             if(selection == null) return;
  83                             for(SelectionListener listener : selectionListeners) scale.removeSelectionListener(listener);
  84                             scale.setSelection(selection);
  85                             for(SelectionListener listener : selectionListeners) scale.addSelectionListener(listener);
  86                         }
  87
  88                     });
  89                 }
  90
  91                 @Override
  92                 public boolean isDisposed() {
  93                     return scale.isDisposed();
  94                 }
  95
  96             });
  97         }
  98
  99     }
 100
 101     public synchronized void addSelectionListener(SelectionListener listener) {
 102         selectionListeners.add(listener);
 103         scale.addSelectionListener(listener);
 104     }
 105
 106 }