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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt.widgets;\r
  13 \r
  14 import java.util.concurrent.CopyOnWriteArrayList;\r
  15 \r
  16 import org.eclipse.swt.events.SelectionListener;\r
  17 import org.eclipse.swt.widgets.Composite;\r
  18 import org.eclipse.swt.widgets.Control;\r
  19 import org.eclipse.swt.widgets.Display;\r
  20 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;\r
  21 import org.simantics.browsing.ui.swt.widgets.impl.Widget;\r
  22 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;\r
  23 import org.simantics.db.management.ISessionContext;\r
  24 import org.simantics.db.procedure.Listener;\r
  25 \r
  26 public class Scale extends WidgetImpl {\r
  27 \r
  28     private ReadFactory<?, Integer> selectionFactory;\r
  29     private final CopyOnWriteArrayList<SelectionListener> selectionListeners = new CopyOnWriteArrayList<SelectionListener>();\r
  30 \r
  31     final private Display display;\r
  32     final private org.eclipse.swt.widgets.Scale scale;\r
  33 \r
  34     public Scale(Composite parent, WidgetSupport support, int style) {\r
  35         super(support);\r
  36         this.display = parent.getDisplay();\r
  37         scale = new org.eclipse.swt.widgets.Scale(parent, style);\r
  38         scale.setData("org.simantics.browsing.ui.widgets.Scale", this);\r
  39         support.register(this);\r
  40     }\r
  41 \r
  42     public void setSelectionFactory(ReadFactory<?, Integer> selectionFactory) {\r
  43         this.selectionFactory = selectionFactory;\r
  44     }\r
  45 \r
  46     public org.eclipse.swt.widgets.Scale getWidget() {\r
  47         return scale;\r
  48     }\r
  49 \r
  50     @Override\r
  51     public Control getControl() {\r
  52         return scale;\r
  53     }\r
  54 \r
  55     @Override\r
  56     public void setInput(ISessionContext context, Object input) {\r
  57 \r
  58         if (selectionListeners != null) {\r
  59             for (SelectionListener listener : selectionListeners) {\r
  60                 if(listener instanceof Widget) {\r
  61                     ((Widget) listener).setInput(context, input);\r
  62                 }\r
  63             }\r
  64         }\r
  65 \r
  66         if(selectionFactory != null) {\r
  67             selectionFactory.listen(context, input, new Listener<Integer>() {\r
  68 \r
  69                 @Override\r
  70                 public void exception(Throwable t) {\r
  71                     t.printStackTrace();\r
  72                 }\r
  73 \r
  74                 @Override\r
  75                 public void execute(final Integer selection) {\r
  76                     if(isDisposed()) return;\r
  77                     display.asyncExec(new Runnable() {\r
  78 \r
  79                         @Override\r
  80                         public void run() {\r
  81                             if(isDisposed()) return;\r
  82                             if(selection == null) return;\r
  83                             for(SelectionListener listener : selectionListeners) scale.removeSelectionListener(listener);\r
  84                             scale.setSelection(selection);\r
  85                             for(SelectionListener listener : selectionListeners) scale.addSelectionListener(listener);\r
  86                         }\r
  87 \r
  88                     });\r
  89                 }\r
  90 \r
  91                 @Override\r
  92                 public boolean isDisposed() {\r
  93                     return scale.isDisposed();\r
  94                 }\r
  95 \r
  96             });\r
  97         }\r
  98 \r
  99     }\r
 100 \r
 101     public synchronized void addSelectionListener(SelectionListener listener) {\r
 102         selectionListeners.add(listener);\r
 103         scale.addSelectionListener(listener);\r
 104     }\r
 105 \r
 106 }\r