| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| package org.openoffice.accessibility.awb.tree; |
| |
| import com.sun.star.uno.UnoRuntime; |
| import com.sun.star.accessibility.XAccessible; |
| import com.sun.star.accessibility.XAccessibleContext; |
| |
| /* |
| * This class is dynamic in the way that it does not contain any children |
| * until the node is going to be expanded. It also releases all children |
| * as soon as the node is collapsed again. |
| */ |
| class DynamicAccessibilityNode extends AccessibilityNode { |
| |
| public DynamicAccessibilityNode(AccessibilityModel treeModel) { |
| super(treeModel); |
| } |
| |
| // Populates the child list. Called by AccessibilityMode.treeWillExpand(). |
| protected void populate() { |
| try { |
| XAccessibleContext xAC = getAccessibleContext(); |
| if (xAC != null) { |
| int n = xAC.getAccessibleChildCount(); |
| for (int i=0; i<n; i++) { |
| XAccessible xAccessible = xAC.getAccessibleChild(i); |
| AccessibilityNode node = treeModel.findNode(xAccessible); |
| if (node == null) { |
| node = treeModel.createNode(xAccessible); |
| } |
| if (node != null) { |
| // NOTE: do not send any tree notifications here ! |
| add(node); |
| } |
| } |
| } |
| } catch (com.sun.star.lang.IndexOutOfBoundsException e) { |
| // This should never happen since we previously checked the child |
| // count. |
| // FIXME: error message |
| } catch (com.sun.star.uno.RuntimeException e) { |
| // FIXME: error message |
| } |
| } |
| |
| // Clears the child list. Called by AccessibilityModel.treeCollapsed(). |
| protected void clear() { |
| removeAllChildren(); |
| } |
| |
| /* This is called whenever the node is painted, no matter if collapsed |
| * or expanded. Making this a "life" value seems to be appropriate. |
| */ |
| public boolean isLeaf() { |
| try { |
| XAccessibleContext xAC = getAccessibleContext(); |
| if (xAC != null) { |
| return xAC.getAccessibleChildCount() == 0; |
| } |
| return true; |
| } catch (com.sun.star.uno.RuntimeException e) { |
| return true; |
| } |
| } |
| |
| } |