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Diffstat (limited to 'accessibility/workben/org/openoffice/accessibility/awb/tree/DynamicAccessibilityNode.java')
-rw-r--r-- | accessibility/workben/org/openoffice/accessibility/awb/tree/DynamicAccessibilityNode.java | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/accessibility/workben/org/openoffice/accessibility/awb/tree/DynamicAccessibilityNode.java b/accessibility/workben/org/openoffice/accessibility/awb/tree/DynamicAccessibilityNode.java new file mode 100644 index 000000000000..a982ad71c4d5 --- /dev/null +++ b/accessibility/workben/org/openoffice/accessibility/awb/tree/DynamicAccessibilityNode.java @@ -0,0 +1,92 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 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; + } + } + +} |