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import drafts.com.sun.star.accessibility.XAccessible;
import drafts.com.sun.star.accessibility.XAccessibleContext;
import drafts.com.sun.star.accessibility.XAccessibleComponent;
import drafts.com.sun.star.accessibility.XAccessibleExtendedComponent;
import drafts.com.sun.star.accessibility.XAccessibleAction;
import drafts.com.sun.star.accessibility.XAccessibleImage;
import drafts.com.sun.star.accessibility.XAccessibleRelationSet;
import drafts.com.sun.star.accessibility.XAccessibleStateSet;
import drafts.com.sun.star.accessibility.XAccessibleText;
import drafts.com.sun.star.accessibility.XAccessibleEditableText;
import drafts.com.sun.star.accessibility.AccessibleTextType;
import drafts.com.sun.star.accessibility.XAccessibleEventListener;
import drafts.com.sun.star.accessibility.XAccessibleEventBroadcaster;
import drafts.com.sun.star.accessibility.AccessibleEventObject;
import drafts.com.sun.star.accessibility.AccessibleEventId;
import com.sun.star.lang.XServiceInfo;
import com.sun.star.lang.IndexOutOfBoundsException;
import com.sun.star.uno.UnoRuntime;
import java.util.Vector;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
// JDK 1.4.
// import java.util.regex.Pattern;
// import java.util.regex.Matcher;
/** This class is a start to collect the handling of a JTree and a DefaultTreeModel.
*/
public class AccessibilityTree
extends JTree
{
/** Create a new accessibility tree. Use the specified message display
for displaying messages and the specified canvas to draw the
graphical representations of accessible objects on.
*/
public AccessibilityTree (
MessageInterface aMessageDisplay,
Canvas aCanvas)
{
maMessageDisplay = aMessageDisplay;
maCanvas = aCanvas;
setModel( new AccessibilityTreeModel( "Please press Update button" ) );
maCellRenderer = new AccessibleTreeCellRenderer();
// setCellRenderer (maCellRenderer);
// allow editing of XAccessibleText interfaces
// setEditable (true);
// maTreeModel.addTreeModelListener( new TextUpdateListener() );
addMouseListener( new MouseListener() );
}
/** Predicate class to determine whether a node should be expanded
* For use with expandTree method */
abstract class Expander
{ abstract public boolean expand(Object aObject); }
/** expand all nodes */
class AllExpander extends Expander
{
public boolean expand(Object aObject) { return true; }
}
/** expand all nodes with accessibility roles > 100 */
class ShapeExpander extends Expander
{
public boolean expand(Object aObject)
{
aObject = AccessibilityTreeModel.normalize( aObject );
XAccessibleContext xContext =
(XAccessibleContext)UnoRuntime.queryInterface(
XAccessibleContext.class, aObject );
int nRole = ( xContext == null ) ? -1 :
xContext.getAccessibleRole();
return (nRole >= 100);
}
}
private TreePath expandTree( TreePath aPath, Expander aExpander )
{
// return first expanded object
TreePath aFirst = null;
// get 'our' object
Object aObj = aPath.getLastPathComponent();
// expand this object, if the Expander tells us so
if( aExpander.expand( aObj ) )
{
expandPath (aPath);
if( aFirst == null )
aFirst = aPath;
}
// visit all children
if( aObj instanceof AccTreeNode )
{
AccTreeNode aNode = (AccTreeNode)aObj;
int nLength = aNode.getChildCount();
for( int i = 0; i < nLength; i++ )
{
TreePath aRet = expandTree(
aPath.pathByAddingChild( aNode.getChild( i ) ),
aExpander );
if( aFirst == null )
aFirst = aRet;
}
}
return aFirst;
}
/** Expand all nodes and their subtrees that represent shapes. Call
* this method from the outside. */
public void expandShapes ()
{
message ("Expanding shapes.");
TreePath aFirst = expandTree( new TreePath( getModel().getRoot() ),
new ShapeExpander() );
if( aFirst != null )
{
makeVisible (aFirst);
}
}
/** Expand all nodes */
public void expandAll ()
{
message ("Expanding complete tree");
expandTree( new TreePath( getModel().getRoot() ), new AllExpander() );
}
protected void message (String message)
{
maMessageDisplay.message (message);
}
public void disposing (com.sun.star.lang.EventObject e)
{
System.out.println ("disposing " + e);
}
class MouseListener extends MouseAdapter
{
public void mousePressed(MouseEvent e) { popupTrigger(e); }
public void mouseClicked(MouseEvent e) { popupTrigger(e); }
public void mouseEntered(MouseEvent e) { popupTrigger(e); }
public void mouseExited(MouseEvent e) { popupTrigger(e); }
public void mouseReleased(MouseEvent e) { popupTrigger(e); }
public boolean popupTrigger( MouseEvent e )
{
boolean bIsPopup = e.isPopupTrigger();
if( bIsPopup )
{
int selRow = getRowForLocation(e.getX(), e.getY());
TreePath aPath = getPathForLocation(e.getX(), e.getY());
// check for actions
Object aObject = aPath.getLastPathComponent();
if( aObject instanceof AccTreeNode )
{
AccTreeNode aNode = (AccTreeNode)aObject;
JPopupMenu aMenu = new JPopupMenu();
Vector aActions = new Vector();
aNode.getActions(aActions);
for( int i = 0; i < aActions.size(); i++ )
{
aMenu.add( new NodeAction(
aActions.elementAt(i).toString(),
aNode, i ) );
}
// show menu (if we have actions)
if( aActions.size() > 0 )
aMenu.show( AccessibilityTree.this, e.getX(), e.getY() );
}
}
return bIsPopup;
}
}
class NodeAction extends AbstractAction
{
private int mnIndex;
private AccTreeNode maNode;
public NodeAction( String aName, AccTreeNode aNode, int nIndex )
{
super( aName );
maNode = aNode;
mnIndex = nIndex;
}
public void actionPerformed(ActionEvent e)
{
maNode.performAction(mnIndex);
}
}
/** listen to tree model changes in order to update XAccessibleText objects
*/
class TextUpdateListener implements TreeModelListener
{
public void treeNodesChanged(TreeModelEvent e)
{
// if the change is to the first child of a DefaultMutableTreeNode
// with an XAccessibleText child, then we call updateText
int[] aIndices = e.getChildIndices();
if( (aIndices != null) &&
(aIndices.length > 0) )
{
// we have a parent... lets check for XAccessibleText then
DefaultMutableTreeNode aParent = (DefaultMutableTreeNode)
(e.getTreePath().getLastPathComponent());
DefaultMutableTreeNode aNode = (DefaultMutableTreeNode)
(aParent.getChildAt(aIndices[0]));
if( aParent.getUserObject() instanceof XAccessibleText)
{
// aha! we have an xText. So we can now check for
// the various cases we support
XAccessibleText xText =
(XAccessibleText)aParent.getUserObject();
if( aIndices[0] == 0 )
{
// first child! Then we call updateText
updateText( xText, aNode.toString() );
}
else
{
// JDK 1.4:
// // check for pattern "Selection:"
// Matcher m = Pattern.compile(
// "selection: \\[(-?[0-9]+),(-?[0-9]+)\\] \".*" ).
// matcher( aNode.toString() );
// if( m.matches() )
// {
// try
// {
// // aha! Selection:
// setSelection( xText,
// Integer.parseInt(m.group(1)),
// Integer.parseInt(m.group(2)) );
// }
// catch( NumberFormatException f )
// {
// // ignore
// }
// }
}
}
}
}
// don't care:
public void treeNodesInserted(TreeModelEvent e) { ; }
public void treeNodesRemoved(TreeModelEvent e) { ; }
public void treeStructureChanged(TreeModelEvent e) { ; }
/** update the text */
boolean updateText( XAccessibleText xText, String sNew )
{
// is this text editable? if not, fudge you and return
XAccessibleEditableText xEdit =
(XAccessibleEditableText) UnoRuntime.queryInterface (
XAccessibleEditableText.class, xText);
if (xEdit == null)
return false;
String sOld = xText.getText();
// false alarm? Early out if no change was done!
if( sOld.equals( sNew ) )
return false;
// get the minimum length of both strings
int nMinLength = sOld.length();
if( sNew.length() < nMinLength )
nMinLength = sNew.length();
// count equal characters from front and end
int nFront = 0;
while( (nFront < nMinLength) &&
(sNew.charAt(nFront) == sOld.charAt(nFront)) )
nFront++;
int nBack = 0;
while( (nBack < nMinLength) &&
( sNew.charAt(sNew.length()-nBack-1) ==
sOld.charAt(sOld.length()-nBack-1) ) )
nBack++;
if( nFront + nBack > nMinLength )
nBack = nMinLength - nFront;
// so... the first nFront and the last nBack characters
// are the same. Change the others!
String sDel = sOld.substring( nFront, sOld.length() - nBack );
String sIns = sNew.substring( nFront, sNew.length() - nBack );
System.out.println("edit text: " +
sOld.substring(0, nFront) +
" [ " + sDel + " -> " + sIns + " ] " +
sOld.substring(sOld.length() - nBack) );
boolean bRet = false;
try
{
// edit the text, and use
// (set|insert|delete|replace)Text as needed
if( nFront+nBack == 0 )
bRet = xEdit.setText( sIns );
else if( sDel.length() == 0 )
bRet = xEdit.insertText( sIns, nFront );
else if( sIns.length() == 0 )
bRet = xEdit.deleteText( nFront, sOld.length()-nBack );
else
bRet = xEdit.replaceText(nFront, sOld.length()-nBack,sIns);
}
catch( IndexOutOfBoundsException e )
{
bRet = false;
}
return bRet;
}
boolean setSelection( XAccessibleText xText, int p1, int p2 )
{
try
{
return xText.setSelection( p1, p2 );
}
catch( com.sun.star.lang.IndexOutOfBoundsException f )
{
return false;
}
}
// /** replace the given node with a new xText node */
// void updateNode( XAccessibleText xText,
// DefaultMutableTreeNode aNode )
// {
// // create a new node
// DefaultMutableTreeNode aNew = newTextTreeNode( xText );
//
// // get parent (must be DefaultMutableTreeNode)
// DefaultMutableTreeNode aParent =
// (DefaultMutableTreeNode)aNode.getParent();
// if( aParent != null )
// {
// // remove old sub-tree, and insert new one
// int nIndex = aParent.getIndex( aNode );
// aParent.remove( nIndex );
// aParent.insert( aNew, nIndex );
// }
// }
}
protected MessageInterface
maMessageDisplay;
protected AccessibleTreeCellRenderer
maCellRenderer;
private Canvas
maCanvas;
private boolean
mbFirstShapeSeen;
}
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