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view org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/viewers/TreeViewerUpdater.d @ 125:c43718956f21 default tip
Updated the snippets status.
author | Jacob Carlborg <doob@me.com> |
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date | Thu, 11 Aug 2011 19:55:14 +0200 |
parents | 6be48cf9f95c |
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/******************************************************************************* * Copyright (c) 2008 Matthew Hall and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Matthew Hall - initial API and implementation (bug 207858) * Matthew Hall - bug 226765 ******************************************************************************/ module org.eclipse.jface.internal.databinding.viewers.TreeViewerUpdater; import java.lang.all; import org.eclipse.jface.util.Util; import org.eclipse.jface.viewers.AbstractTreeViewer; import org.eclipse.jface.viewers.IElementComparer; import org.eclipse.jface.viewers.ITreeSelection; import org.eclipse.jface.viewers.TreePath; import org.eclipse.jface.viewers.TreeViewer; /** * NON-API - An interface for sending updates to an {@link AbstractTreeViewer}. * * @since 1.2 */ public class TreeViewerUpdater { private final AbstractTreeViewer viewer; private final TreeViewer treeViewer; /** * Constructs an ITreeViewerUpdater for updating the given viewer. * * @param viewer * the viewer that will be updated */ public this(AbstractTreeViewer viewer) { this.viewer = viewer; if (null !is cast(TreeViewer)viewer) treeViewer = cast(TreeViewer) viewer; else treeViewer = null; } /** * Insert the element into the viewer as a child of the specified parent * element, at the specified position. * * @param parent * the parent of the element being inserted * @param element * the element to insert * @param position * the position where the element is inserted */ public void insert(Object parent, Object element, int position) { viewer.insert(parent, element, position); } /** * Replaces the specified element whenever it appears as a child of the * specified parent element, at the given position with the new element. * * @param parent * the parent of the element being replaced * @param oldElement * the element being replaced * @param newElement * the element that replaces <code>oldElement</code> * @param position * the position of the element being replaced. */ public void replace(Object parent, Object oldElement, Object newElement, int position) { if (treeViewer !is null && viewer.getComparator() is null && viewer.getFilters().length is 0) { treeViewer.replace(parent, position, newElement); } else { remove(parent, oldElement, position); insert(parent, newElement, position); } } /** * Moves the specified element from the specified old position to the * specified new position, whenever it appears as a child of the specified * parent element. No action is taken if the viewer has a sorter or * filter(s). * * @param parent * the parent of the element being moved * @param element * the element being moved * @param oldPosition * the position of the element before it is moved * @param newPosition * the position of the element after it is moved */ public void move(Object parent, Object element, int oldPosition, int newPosition) { if (viewer.getComparator() is null && viewer.getFilters().length is 0) { ITreeSelection selection = cast(ITreeSelection) viewer.getSelection(); remove(parent, element, oldPosition); insert(parent, element, newPosition); // Preserve selection if (!selection.isEmpty()) { // If the moved element is selected (or an ancestor of a // selected element), restore the selection. IElementComparer comparer = viewer.getComparer(); TreePath[] paths = selection.getPaths(); outer: for (int i = 0; i < paths.length; i++) { TreePath path = paths[i]; for (int j = 0; j < path.getSegmentCount(); j++) { Object pathElement = path.getSegment(j); if (comparer is null ? Util .opEquals(element, pathElement) : comparer .opEquals(element, pathElement)) { viewer.setSelection(selection); break outer; } } } } } } /** * Removes the element from the from whenever it appears as a child of the * specified parent element, at the specified position. * * @param parent * the parent of the element being removed * @param element * the element to remove * @param position * the position where the element is located */ public void remove(Object parent, Object element, int position) { if (treeViewer !is null && viewer.getComparator() is null && viewer.getFilters().length is 0) { // Only TreeViewer has a remove-by-index method. treeViewer.remove(parent, position); } else { viewer.remove(parent, [ element ]); } } /** * Add the elements into the viewer as children of the specified parent * element. * * @param parent * the parent of the element being inserted * @param elements * the elements to insert */ public void add(Object parent, Object[] elements) { viewer.add(parent, elements); } /** * Remove the elements from the viewer wherever they appear as children of * the specified parent element. * * @param parent * the parent of the elements being removed * @param elements * the elements to remove */ public void remove(Object parent, Object[] elements) { viewer.remove(parent, elements); } }