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| -rw-r--r-- | toolkit/test/accessibility/AccessibilityTree.java | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/toolkit/test/accessibility/AccessibilityTree.java b/toolkit/test/accessibility/AccessibilityTree.java new file mode 100644 index 000000000..fdf44177a --- /dev/null +++ b/toolkit/test/accessibility/AccessibilityTree.java @@ -0,0 +1,379 @@ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +import java.awt.Cursor; +import java.awt.event.ActionEvent; +import java.awt.event.MouseAdapter; +import java.awt.event.MouseEvent; +import java.util.ArrayList; + +import javax.swing.AbstractAction; +import javax.swing.JPopupMenu; +import javax.swing.JTree; +import javax.swing.event.TreeExpansionEvent; +import javax.swing.event.TreeExpansionListener; +import javax.swing.event.TreeWillExpandListener; +import javax.swing.tree.TreePath; + +import com.sun.star.accessibility.XAccessibleContext; + + + +/** This is the tree component that is responsible for displaying the + contents of the tree model on the screen. +*/ +public class AccessibilityTree + implements TreeExpansionListener, TreeWillExpandListener +{ + /** 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 () + { + maTree = new JTree (); + + AccessibilityTreeModel aModel = + new AccessibilityTreeModel ( + new StringNode ("Please press Update button", null)); + maTree.setModel (aModel); + + maTree.addMouseListener (new MouseListener (this)); + + // Listen to expansions and collapses to change the mouse cursor. + mnExpandLevel = 0; + maTree.addTreeWillExpandListener (this); + maTree.addTreeExpansionListener (this); + } + + public JTree getComponent () + { + return maTree; + } + + // Change cursor during expansions to show the user that this is a + // lengthy operation. + public void treeWillExpand (TreeExpansionEvent e) + { + if (mnExpandLevel == 0) + { + maTree.setCursor (new Cursor (Cursor.WAIT_CURSOR)); + } + mnExpandLevel += 1; + } + public void treeWillCollapse (TreeExpansionEvent e) + { + if (mnExpandLevel == 0) + { + maTree.setCursor (new Cursor (Cursor.WAIT_CURSOR)); + } + mnExpandLevel += 1; + } + public void treeExpanded (TreeExpansionEvent e) + { + mnExpandLevel -= 1; + if (mnExpandLevel == 0) + { + maTree.setCursor (new Cursor (Cursor.DEFAULT_CURSOR)); + } + } + public void treeCollapsed (TreeExpansionEvent e) + { + mnExpandLevel -= 1; + if (mnExpandLevel == 0) + { + maTree.setCursor (new Cursor (Cursor.DEFAULT_CURSOR)); + } + } + + + + public void SetCanvas (Canvas aCanvas) + { + ((AccessibilityTreeModel)maTree.getModel()).setCanvas(aCanvas); + } + + /** Expand the nodes in the subtree rooted in aNode according to the + specified expander. The tree is locked during the expansion. + */ + private void expandTree (AccessibleTreeNode aNode, Expander aExpander) + { + if (mnExpandLevel == 0) + { + maTree.setEnabled (false); + } + mnExpandLevel += 1; + + ((AccessibilityTreeModel)maTree.getModel()).lock (); + + try + { + expandTree (new TreePath (aNode.createPath()), aExpander); + } + catch (Exception e) + { + // Ignore + } + + mnExpandLevel -= 1; + if (mnExpandLevel == 0) + { + maTree.setEnabled (true); + ((AccessibilityTreeModel)maTree.getModel()).unlock (aNode); + } + } + + private TreePath expandTree( TreePath aPath, Expander aExpander ) + { + // return first expanded object + TreePath aFirst = null; + + try + { + // get 'our' object + Object aObj = aPath.getLastPathComponent(); + + // expand this object, if the Expander tells us so + if( aExpander.expand( aObj ) ) + { + maTree.expandPath (aPath); + aFirst = aPath; + } + + // visit all children + if (aObj instanceof AccessibleTreeNode) + { + AccessibleTreeNode aNode = (AccessibleTreeNode)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; + } + } + } + catch (Exception e) + { + System.out.println ("caught exception while expanding tree path " + + aPath + ": " + e); + e.printStackTrace (); + } + + return aFirst; + } + + + /** Expand all nodes and their subtrees that represent shapes. Call + * this method from the outside. */ + public void expandShapes () + { + expandShapes ((AccessibleTreeNode)maTree.getModel().getRoot()); + } + private void expandShapes (AccessibleTreeNode aNode) + { + expandTree (aNode, new ShapeExpander()); + } + + /** Expand all nodes */ + public void expandAll () + { + expandAll ((AccessibleTreeNode)maTree.getModel().getRoot()); + } + private void expandAll (AccessibleTreeNode aNode) + { + expandTree (aNode, new AllExpander()); + } + + + + /* + public Dimension getPreferredSize () + { + Dimension aPreferredSize = super.getPreferredSize(); + Dimension aMinimumSize = super.getMinimumSize(); + if (aPreferredSize.width < aMinimumSize.width) + aPreferredSize.width = aMinimumSize.width; + return aPreferredSize; + } + */ + + private class MouseListener extends MouseAdapter + { + public MouseListener (AccessibilityTree aTree) + { + maTree=aTree; + } + @Override + public void mousePressed(MouseEvent e) { popupTrigger(e); } + @Override + public void mouseClicked(MouseEvent e) { popupTrigger(e); } + @Override + public void mouseEntered(MouseEvent e) { popupTrigger(e); } + @Override + public void mouseExited(MouseEvent e) { popupTrigger(e); } + @Override + public void mouseReleased(MouseEvent e) { popupTrigger(e); } + + private boolean popupTrigger( MouseEvent e ) + { + boolean bIsPopup = e.isPopupTrigger(); + if( !bIsPopup ) + return false; + + int selRow = maTree.getComponent().getRowForLocation(e.getX(), e.getY()); + if (selRow == -1) + return bIsPopup; + + TreePath aPath = maTree.getComponent().getPathForLocation(e.getX(), e.getY()); + + // check for actions + Object aObject = aPath.getLastPathComponent(); + JPopupMenu aMenu = new JPopupMenu(); + if( aObject instanceof AccTreeNode ) + { + AccTreeNode aNode = (AccTreeNode)aObject; + + ArrayList<String> aActions = new ArrayList<String>(); + aMenu.add (new AccessibilityTree.ShapeExpandAction(maTree, aNode)); + aMenu.add (new AccessibilityTree.SubtreeExpandAction(maTree, aNode)); + + aNode.getActions(aActions); + for( int i = 0; i < aActions.size(); i++ ) + { + aMenu.add( new NodeAction( + aActions.get(i), + aNode, i ) ); + } + } + else if (aObject instanceof AccessibleTreeNode) + { + AccessibleTreeNode aNode = (AccessibleTreeNode)aObject; + String[] aActionNames = aNode.getActions(); + int nCount=aActionNames.length; + if (nCount > 0) + { + for (int i=0; i<nCount; i++) + aMenu.add( new NodeAction( + aActionNames[i], + aNode, + i)); + } + else + aMenu = null; + } + if (aMenu != null) + aMenu.show (maTree.getComponent(), + e.getX(), e.getY()); + + return bIsPopup; + } + + private final AccessibilityTree maTree; + } + + private class NodeAction extends AbstractAction + { + private final int mnIndex; + private final AccessibleTreeNode maNode; + + private NodeAction( String aName, AccessibleTreeNode aNode, int nIndex ) + { + super( aName ); + maNode = aNode; + mnIndex = nIndex; + } + + public void actionPerformed(ActionEvent e) + { + maNode.performAction(mnIndex); + } + } + + // This action expands all shapes in the subtree rooted in the specified node. + private class ShapeExpandAction extends AbstractAction + { + private final AccessibilityTree maTree; + private final AccTreeNode maNode; + public ShapeExpandAction (AccessibilityTree aTree, AccTreeNode aNode) + { + super ("Expand Shapes"); + maTree = aTree; + maNode = aNode; + } + public void actionPerformed (ActionEvent e) + { + maTree.expandShapes (maNode); + } + } + + // This action expands all nodes in the subtree rooted in the specified node. + private class SubtreeExpandAction extends AbstractAction + { + private final AccessibilityTree maTree; + private final AccTreeNode maNode; + public SubtreeExpandAction (AccessibilityTree aTree, AccTreeNode aNode) + { + super ("Expand Subtree"); + maTree = aTree; + maNode = aNode; + } + public void actionPerformed (ActionEvent e) + { + maTree.expandAll (maNode); + } + } + + /** Predicate class to determine whether a node should be expanded + * For use with expandTree method */ + private abstract class Expander + { + abstract public boolean expand (Object aObject); + } + + /** expand all nodes */ + private class AllExpander extends Expander + { + @Override + public boolean expand(Object aObject) { return true; } + } + + /** expand all nodes with accessibility roles > 100 */ + private class ShapeExpander extends Expander + { + @Override + public boolean expand (Object aObject) + { + if (aObject instanceof AccTreeNode) + { + AccTreeNode aNode = (AccTreeNode)aObject; + XAccessibleContext xContext = aNode.getContext(); + if (xContext != null && xContext.getAccessibleRole() >= 100) + return true; + } + return false; + } + } + + + + private final JTree maTree; + private int mnExpandLevel; +} |