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.lang.reflect.InvocationTargetException;
  26 import java.lang.reflect.Method;
  27 import java.util.ArrayList;
  28
  29 import javax.swing.BorderFactory;
  30 import javax.swing.JPanel;
  31 import javax.swing.JTree;
  32 import javax.swing.border.BevelBorder;
  33 import javax.swing.border.Border;
  34
  35 import com.sun.star.accessibility.XAccessibleContext;
  36
  37
  38 public class ObjectViewContainer
  39     extends JPanel
  40 {
  41     public ObjectViewContainer ()
  42     {
  43         maViewTemplates = new ArrayList<Class> ();
  44         maViewBorder = BorderFactory.createBevelBorder (BevelBorder.RAISED);
  45         setLayout (new GridBagLayout ());
  46
  47         System.out.println ("ObjectViewContainer");
  48         RegisterView (ContextView.class);
  49         //        RegisterView (StateSetView.class);
  50         RegisterView (FocusView.class);
  51         RegisterView (TextView.class);
  52     }
  53
  54
  55
  56     /** Remove all existing views and create new ones according to the
  57         interfaces supported by the given object.
  58     */
  59     public void SetObject (XAccessibleContext xContext)
  60     {
  61         // Call Destroy at all views to give them a chance to release their
  62         // resources.
  63         int n = getComponentCount();
  64         for (int i=0; i<n; i++)
  65             ((ObjectView)getComponent(i)).Destroy();
  66         // Remove existing views.
  67         removeAll ();
  68
  69         // Add new views.
  70         for (int i=0; i<maViewTemplates.size(); i++)
  71         {
  72             try
  73             {
  74                 Class aViewClass = maViewTemplates.get (i);
  75                 Method aCreateMethod = aViewClass.getDeclaredMethod (
  76                     "Create", new Class[] {
  77                         ObjectViewContainer.class,
  78                         XAccessibleContext.class});
  79                 if (aCreateMethod != null)
  80                 {
  81                     ObjectView aView = (ObjectView)
  82                         aCreateMethod.invoke (null, new Object[] {this, xContext});
  83                     Add (aView);
  84                 }
  85             }
  86             catch (NoSuchMethodException e)
  87             {System.err.println ("Caught exception while creating view " + i + " : " + e);}
  88             catch (IllegalAccessException e)
  89             {System.err.println ("Caught exception while creating view " + i + " : " + e);}
  90             catch (InvocationTargetException e)
  91             {System.err.println ("Caught exception while creating view " + i + " : " + e);}
  92         }
  93
  94         UpdateLayoutManager ();
  95
  96         // Now set the object at all views.
  97         n = getComponentCount();
  98         for (int i=0; i<n; i++)
  99             ((ObjectView)getComponent(i)).SetObject (xContext);
 100
 101         setPreferredSize (getLayout().preferredLayoutSize (this));
 102     }
 103
 104
 105     /** Add the given class to the list of classes which will be
 106         instantiated the next time an accessible object is set.
 107     */
 108     public void RegisterView (Class aObjectViewClass)
 109     {
 110         System.out.println ("registering " + aObjectViewClass);
 111         maViewTemplates.add(aObjectViewClass);
 112     }
 113
 114     /** Replace one view class with another.
 115     */
 116     public void ReplaceView (Class aObjectViewClass, Class aSubstitution)
 117     {
 118         int nIndex = maViewTemplates.indexOf (aObjectViewClass);
 119         if (nIndex >= 0)
 120             maViewTemplates.set (nIndex, aSubstitution);
 121     }
 122
 123     /** Add an object view and place it below all previously added views.
 124         @param aView
 125             This argument may be null.  In this case nothing happens.
 126     */
 127     private void Add (ObjectView aView)
 128     {
 129         if (aView != null)
 130         {
 131             GridBagConstraints constraints = new GridBagConstraints ();
 132             constraints.gridx = 0;
 133             constraints.gridy = getComponentCount();
 134             constraints.gridwidth = 1;
 135             constraints.gridheight = 1;
 136             constraints.weightx = 1;
 137             constraints.weighty = 0;
 138             constraints.ipadx = 2;
 139             constraints.ipady = 5;
 140             constraints.insets = new Insets (5,5,5,5);
 141             constraints.anchor = GridBagConstraints.NORTH;
 142             constraints.fill = GridBagConstraints.HORIZONTAL;
 143
 144             aView.setBorder (
 145                 BorderFactory.createTitledBorder (
 146                     maViewBorder, aView.GetTitle()));
 147
 148             add (aView, constraints);
 149         }
 150     }
 151
 152     /** Update the layout manager by setting the vertical weight of the
 153         bottom entry to 1 and so make it strech to over the available
 154         space.
 155
 156     */
 157     private void UpdateLayoutManager ()
 158     {
 159         // Adapt the layout manager.
 160         if (getComponentCount() > 0)
 161         {
 162             Component aComponent = getComponent (getComponentCount()-1);
 163             GridBagLayout aLayout = (GridBagLayout)getLayout();
 164             GridBagConstraints aConstraints = aLayout.getConstraints (aComponent);
 165             aConstraints.weighty = 1;
 166             aLayout.setConstraints (aComponent, aConstraints);
 167         }
 168     }
 169
 170     /// Observe this tree for selection changes and notify them to all
 171     /// children.
 172     private JTree maTree;
 173     private Border maViewBorder;
 174     /// List of view templates which are instantiated when new object is set.
 175     private ArrayList<Class> maViewTemplates;
 176 }