toolkit/test/accessibility/ov/ObjectViewContainer.java

   1 /*
   2  * This file is part of the LibreOffice project.
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7  *
   8  * This file incorporates work covered by the following license notice:
   9  *
  10  *   Licensed to the Apache Software Foundation (ASF) under one or more
  11  *   contributor license agreements. See the NOTICE file distributed
  12  *   with this work for additional information regarding copyright
  13  *   ownership. The ASF licenses this file to you under the Apache
  14  *   License, Version 2.0 (the "License"); you may not use this file
  15  *   except in compliance with the License. You may obtain a copy of
  16  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  17  */
  18
  19 package ov;
  20
  21 import java.awt.Component;
  22 import java.awt.GridBagConstraints;
  23 import java.awt.GridBagLayout;
  24 import java.awt.Insets;
  25 import java.util.ArrayList;
  26
  27 import javax.swing.BorderFactory;
  28 import javax.swing.JPanel;
  29 import javax.swing.border.BevelBorder;
  30 import javax.swing.border.Border;
  31
  32 import com.sun.star.accessibility.XAccessibleContext;
  33
  34
  35 public class ObjectViewContainer
  36     extends JPanel
  37 {
  38     private static interface IViewFactory {
  39         ObjectView Create (
  40                 ObjectViewContainer aContainer,
  41                 XAccessibleContext xContext);
  42     }
  43
  44     public ObjectViewContainer ()
  45     {
  46         maViewTemplates = new ArrayList<IViewFactory>();
  47         maViewBorder = BorderFactory.createBevelBorder (BevelBorder.RAISED);
  48         setLayout (new GridBagLayout ());
  49
  50         maViewTemplates.add(new IViewFactory() {
  51             public ObjectView Create(ObjectViewContainer aContainer,
  52                     XAccessibleContext xContext) {
  53                 return ContextView.Create(aContainer, xContext);
  54             }
  55         });
  56         maViewTemplates.add(new IViewFactory() {
  57             public ObjectView Create(ObjectViewContainer aContainer,
  58                     XAccessibleContext xContext) {
  59                 return FocusView.Create(aContainer, xContext);
  60             }
  61         });
  62         maViewTemplates.add(new IViewFactory() {
  63             public ObjectView Create(ObjectViewContainer aContainer,
  64                     XAccessibleContext xContext) {
  65                 return TextView.Create(aContainer, xContext);
  66             }
  67         });
  68     }
  69
  70     /** Remove all existing views and create new ones according to the
  71         interfaces supported by the given object.
  72     */
  73     public void SetObject (XAccessibleContext xContext)
  74     {
  75         // Call Destroy at all views to give them a chance to release their
  76         // resources.
  77         int n = getComponentCount();
  78         for (int i=0; i<n; i++)
  79             ((ObjectView)getComponent(i)).Destroy();
  80         // Remove existing views.
  81         removeAll ();
  82
  83         // Add new views.
  84         for (int i=0; i<maViewTemplates.size(); i++)
  85         {
  86             IViewFactory aViewFactory = maViewTemplates.get(i);
  87             ObjectView aView = aViewFactory.Create(this, xContext);
  88             Add (aView);
  89         }
  90
  91         UpdateLayoutManager ();
  92
  93         // Now set the object at all views.
  94         n = getComponentCount();
  95         for (int i=0; i<n; i++)
  96             ((ObjectView)getComponent(i)).SetObject (xContext);
  97
  98         setPreferredSize (getLayout().preferredLayoutSize (this));
  99     }
 100
 101
 102     /** Add an object view and place it below all previously added views.
 103         @param aView
 104             This argument may be null.  In this case nothing happens.
 105     */
 106     private void Add (ObjectView aView)
 107     {
 108         if (aView != null)
 109         {
 110             GridBagConstraints constraints = new GridBagConstraints ();
 111             constraints.gridx = 0;
 112             constraints.gridy = getComponentCount();
 113             constraints.gridwidth = 1;
 114             constraints.gridheight = 1;
 115             constraints.weightx = 1;
 116             constraints.weighty = 0;
 117             constraints.ipadx = 2;
 118             constraints.ipady = 5;
 119             constraints.insets = new Insets (5,5,5,5);
 120             constraints.anchor = GridBagConstraints.NORTH;
 121             constraints.fill = GridBagConstraints.HORIZONTAL;
 122
 123             aView.setBorder (
 124                 BorderFactory.createTitledBorder (
 125                     maViewBorder, aView.GetTitle()));
 126
 127             add (aView, constraints);
 128         }
 129     }
 130
 131     /** Update the layout manager by setting the vertical weight of the
 132         bottom entry to 1 and so make it stretch to over the available
 133         space.
 134
 135     */
 136     private void UpdateLayoutManager ()
 137     {
 138         // Adapt the layout manager.
 139         if (getComponentCount() > 0)
 140         {
 141             Component aComponent = getComponent (getComponentCount()-1);
 142             GridBagLayout aLayout = (GridBagLayout)getLayout();
 143             GridBagConstraints aConstraints = aLayout.getConstraints (aComponent);
 144             aConstraints.weighty = 1;
 145             aLayout.setConstraints (aComponent, aConstraints);
 146         }
 147     }
 148
 149     private final Border maViewBorder;
 150     /// List of view templates which are instantiated when new object is set.
 151     private final ArrayList<IViewFactory> maViewTemplates;
 152 }