[gui] Implement AccessibleAWTList

[Jerry Quinn <jlquinn at optonline dot net>]

2004-12-28  Jerry Quinn  <jlquinn@optonline.net>

	* java/awt/List.java: Implement AccessibleAWTList,
	AccessibleAWTListChild.

Index: List.java
===================================================================
RCS file: /cvs/gcc/gcc/libjava/java/awt/List.java,v
retrieving revision 1.17.2.2
diff -u -r1.17.2.2 List.java
--- List.java	16 Nov 2004 09:55:36 -0000	1.17.2.2
+++ List.java	28 Dec 2004 23:14:46 -0000
@@ -47,6 +47,11 @@
 import java.util.Vector;

 import javax.accessibility.Accessible;
+import javax.accessibility.AccessibleContext;
+import javax.accessibility.AccessibleRole;
+import javax.accessibility.AccessibleSelection;
+import javax.accessibility.AccessibleState;
+import javax.accessibility.AccessibleStateSet;

 /**
   * Class that implements a listbox widget
@@ -106,6 +111,7 @@
 // The list of ActionListeners for this object.
 private ActionListener action_listeners;

+
 /*************************************************************************/

 /*
@@ -1076,4 +1082,185 @@
   {
     return (ItemListener[]) getListeners (ItemListener.class);
   }
+
+  // Accessibility internal class
+  protected class AccessibleAWTList extends AccessibleAWTComponent
+    implements AccessibleSelection, ItemListener, ActionListener
+  {
+    protected class AccessibleAWTListChild extends AccessibleAWTComponent
+      implements Accessible
+    {
+      private int index;
+      private List parent;
+
+      public AccessibleAWTListChild(List parent, int indexInParent)
+      {
+        this.parent = parent;
+        index = indexInParent;
+        if (parent == null)
+          index = -1;
+      }
+
+      /* (non-Javadoc)
+       * @see javax.accessibility.Accessible#getAccessibleContext()
+       */
+      public AccessibleContext getAccessibleContext()
+      {
+        return this;
+      }
+
+      public AccessibleRole getAccessibleRole()
+      {
+        return AccessibleRole.LIST_ITEM;
+      }
+
+      public AccessibleStateSet getAccessibleStateSet()
+      {
+        AccessibleStateSet states = super.getAccessibleStateSet();
+        if (parent.isIndexSelected(index))
+          states.add(AccessibleState.SELECTED);
+        return states;
+      }
+
+      public int getAccessibleIndexInParent()
+      {
+        return index;
+      }
+
+    }
+
+    public AccessibleAWTList()
+    {
+      addItemListener(this);
+      addActionListener(this);
+    }
+
+    public AccessibleRole getAccessibleRole()
+    {
+      return AccessibleRole.LIST;
+    }
+
+    public AccessibleStateSet getAccessibleStateSet()
+    {
+      AccessibleStateSet states = super.getAccessibleStateSet();
+      states.add(AccessibleState.SELECTABLE);
+      if (isMultipleMode())
+        states.add(AccessibleState.MULTISELECTABLE);
+      return states;
+    }
+
+    public int getAccessibleChildrenCount()
+    {
+      return getItemCount();
+    }
+
+    public Accessible getAccessibleChild(int i)
+    {
+      if (i >= getItemCount())
+        return null;
+      return new AccessibleAWTListChild(List.this, i);
+    }
+
+    /* (non-Javadoc)
+     * @see javax.accessibility.AccessibleSelection#getAccessibleSelectionCount()
+     */
+    public int getAccessibleSelectionCount()
+    {
+      return getSelectedIndexes().length;
+    }
+
+    /* (non-Javadoc)
+     * @see javax.accessibility.AccessibleSelection#getAccessibleSelection()
+     */
+    public AccessibleSelection getAccessibleSelection()
+    {
+      return this;
+    }
+
+    /* (non-Javadoc)
+     * @see javax.accessibility.AccessibleSelection#getAccessibleSelection(int)
+     */
+    public Accessible getAccessibleSelection(int i)
+    {
+      int[] items = getSelectedIndexes();
+      if (i >= items.length)
+        return null;
+      return new AccessibleAWTListChild(List.this, items[i]);
+    }
+
+    /* (non-Javadoc)
+     * @see 
javax.accessibility.AccessibleSelection#isAccessibleChildSelected(int)
+     */
+    public boolean isAccessibleChildSelected(int i)
+    {
+      return isIndexSelected(i);
+    }
+
+    /* (non-Javadoc)
+     * @see javax.accessibility.AccessibleSelection#addAccessibleSelection(int)
+     */
+    public void addAccessibleSelection(int i)
+    {
+      select(i);
+    }
+
+    /* (non-Javadoc)
+     * @see 
javax.accessibility.AccessibleSelection#removeAccessibleSelection(int)
+     */
+    public void removeAccessibleSelection(int i)
+    {
+      deselect(i);
+    }
+
+    /* (non-Javadoc)
+     * @see javax.accessibility.AccessibleSelection#clearAccessibleSelection()
+     */
+    public void clearAccessibleSelection()
+    {
+      for (int i = 0; i < getItemCount(); i++)
+        deselect(i);
+    }
+
+    /* (non-Javadoc)
+     * @see 
javax.accessibility.AccessibleSelection#selectAllAccessibleSelection()
+     */
+    public void selectAllAccessibleSelection()
+    {
+      if (isMultipleMode())
+        for (int i = 0; i < getItemCount(); i++)
+          select(i);
+    }
+
+    /* (non-Javadoc)
+     * @see 
java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)
+     */
+    public void itemStateChanged(ItemEvent event)
+    {
+    }
+
+    /* (non-Javadoc)
+     * @see 
java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
+     */
+    public void actionPerformed(ActionEvent event)
+    {
+    }
+
+  }
+
+  /**
+   * Gets the AccessibleContext associated with this <code>List</code>.
+   * The context is created, if necessary.
+   *
+   * @return the associated context
+   */
+  public AccessibleContext getAccessibleContext()
+  {
+    /* Create the context if this is the first request */
+    if (accessibleContext == null)
+      {
+        /* Create the context */
+        accessibleContext = new AccessibleAWTList();
+      }
+    return accessibleContext;
+  }
 } // class List