Mercurial > projects > dwt2
view org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewerFocusCellManager.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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/******************************************************************************* * Copyright (c) 2007, 2008 IBM Corporation 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: * IBM Corporation - initial API and implementation * Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation * - fix in bug: 195908, 210752 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.jface.viewers.TreeViewerFocusCellManager; import org.eclipse.jface.viewers.SWTFocusCellManager; import org.eclipse.jface.viewers.CellNavigationStrategy; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.FocusCellHighlighter; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.jface.viewers.ColumnViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Item; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeItem; import java.lang.all; import java.util.Set; /** * This class is responsible to provide the concept of cells for {@link Tree}. * This concept is needed to provide features like editor activation with the * keyboard * * @since 3.3 * */ public class TreeViewerFocusCellManager : SWTFocusCellManager { private static /+final+/ CellNavigationStrategy TREE_NAVIGATE; static this(){ TREE_NAVIGATE = new class CellNavigationStrategy { public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse, Event event) { if (cellToCollapse !is null) { (cast(TreeItem) cellToCollapse.getItem()).setExpanded(false); } } public void expand(ColumnViewer viewer, ViewerCell cellToExpand, Event event) { if (cellToExpand !is null) { TreeViewer v = cast(TreeViewer) viewer; v.setExpandedState(v.getTreePathFromItem_package(cast(Item)cellToExpand .getItem()), true); } } public bool isCollapseEvent(ColumnViewer viewer, ViewerCell cellToCollapse, Event event) { if (cellToCollapse is null) { return false; } return cellToCollapse !is null && (cast(TreeItem) cellToCollapse.getItem()).getExpanded() && event.keyCode is SWT.ARROW_LEFT && isFirstColumnCell(cellToCollapse); } public bool isExpandEvent(ColumnViewer viewer, ViewerCell cellToExpand, Event event) { if (cellToExpand is null) { return false; } return cellToExpand !is null && (cast(TreeItem) cellToExpand.getItem()).getItemCount() > 0 && !(cast(TreeItem) cellToExpand.getItem()).getExpanded() && event.keyCode is SWT.ARROW_RIGHT && isFirstColumnCell(cellToExpand); } private bool isFirstColumnCell(ViewerCell cell) { return cell.getViewerRow().getVisualIndex_package(cell.getColumnIndex()) is 0; } }; } /** * Create a new manager using a default navigation strategy: * <ul> * <li><code>SWT.ARROW_UP</code>: navigate to cell above</li> * <li><code>SWT.ARROW_DOWN</code>: navigate to cell below</li> * <li><code>SWT.ARROW_RIGHT</code>: on first column (collapses if item * is expanded) else navigate to next visible cell on the right</li> * <li><code>SWT.ARROW_LEFT</code>: on first column (expands if item is * collapsed) else navigate to next visible cell on the left</li> * </ul> * * @param viewer * the viewer the manager is bound to * @param focusDrawingDelegate * the delegate responsible to highlight selected cell */ public this(TreeViewer viewer, FocusCellHighlighter focusDrawingDelegate) { this(viewer, focusDrawingDelegate, TREE_NAVIGATE); } /** * Create a new manager with a custom navigation strategy * * @param viewer * the viewer the manager is bound to * @param focusDrawingDelegate * the delegate responsible to highlight selected cell * @param navigationStrategy * the strategy used to navigate the cells * @since 3.4 */ public this(TreeViewer viewer, FocusCellHighlighter focusDrawingDelegate, CellNavigationStrategy navigationStrategy) { super(viewer, focusDrawingDelegate, navigationStrategy); } override ViewerCell getInitialFocusCell() { Tree tree = cast(Tree) getViewer().getControl(); if (! tree.isDisposed() && tree.getItemCount() > 0 && ! tree.getItem(0).isDisposed()) { return getViewer().getViewerRowFromItem_package(tree.getItem(0)).getCell(0); } return null; } public ViewerCell getFocusCell() { ViewerCell cell = super.getFocusCell(); Tree t = cast(Tree) getViewer().getControl(); // It is possible that the selection has changed under the hood if (cell !is null) { if (t.getSelection().length is 1 && t.getSelection()[0] !is cell.getItem()) { setFocusCell(getViewer().getViewerRowFromItem_package( t.getSelection()[0]).getCell(cell.getColumnIndex())); } } return super.getFocusCell(); } }