122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
import javax.swing.tree.TreeModel;
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import javax.swing.event.TreeModelListener;
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import javax.swing.tree.TreePath;
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import javax.swing.event.TreeModelEvent;
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import java.util.Vector;
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public class AccessibilityTreeModelBase
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implements TreeModel
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{
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public AccessibilityTreeModelBase ()
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{
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setRoot (null);
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maTMListeners = new Vector();
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}
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public synchronized void addTreeModelListener(TreeModelListener l)
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{
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maTMListeners.add(l);
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}
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public synchronized void removeTreeModelListener(TreeModelListener l)
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{
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maTMListeners.remove(l);
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}
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public synchronized int getChildCount(Object aParent)
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{
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return (aParent instanceof AccessibleTreeNode) ?
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((AccessibleTreeNode)aParent).getChildCount() : 0;
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}
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public synchronized Object getChild (Object aParent, int nIndex)
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{
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Object aChild = null;
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try
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{
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if (aParent != null && aParent instanceof AccessibleTreeNode)
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aChild = ((AccessibleTreeNode)aParent).getChild(nIndex);
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else
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System.out.println ("getChild called for unknown parent node");
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}
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catch (com.sun.star.lang.IndexOutOfBoundsException e)
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{
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aChild = ("no child " + nIndex + " from " + aParent + ": " + e);
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}
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return aChild;
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}
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public synchronized Object getChildNoCreate (Object aParent, int nIndex)
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{
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Object aChild = null;
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try
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{
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if (aParent != null && aParent instanceof AccessibleTreeNode)
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aChild = ((AccessibleTreeNode)aParent).getChildNoCreate(nIndex);
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else
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System.out.println ("getChild called for unknown parent node");
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}
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catch (com.sun.star.lang.IndexOutOfBoundsException e)
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{ }
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return aChild;
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}
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/** iterate over all children and look for child */
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public synchronized int getIndexOfChild (Object aParent, Object aChild)
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{
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int nIndex = -1;
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try
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{
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if ((aParent instanceof AccessibleTreeNode) && (aChild instanceof AccessibleTreeNode))
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{
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AccessibleTreeNode aParentNode = (AccessibleTreeNode) aParent;
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AccessibleTreeNode aChildNode = (AccessibleTreeNode) aChild;
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int nChildCount = aParentNode.getChildCount();
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for( int i = 0; i < nChildCount; i++ )
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{
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if (aChildNode.equals (aParentNode.getChild (i)))
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{
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nIndex = i;
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break;
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}
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}
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}
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}
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catch (com.sun.star.lang.IndexOutOfBoundsException e)
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{
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// Return -1 by falling through.
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}
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// not found?
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return nIndex;
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}
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public boolean isLeaf (Object aNode)
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{
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return (aNode instanceof AccessibleTreeNode) ?
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((AccessibleTreeNode)aNode).isLeaf() : true;
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}
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public synchronized Object getRoot()
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{
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return maRoot;
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}
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public void valueForPathChanged(TreePath path, Object newValue)
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{ }
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protected synchronized void setRoot (AccessibleTreeNode aRoot)
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{
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maRoot = aRoot;
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}
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// The list of TreeModelListener objects.
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protected Vector maTMListeners;
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// The root node of the tree. Use setRoot to change it.
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private AccessibleTreeNode maRoot = null;
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}
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