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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java deleted file mode 100644 index 04776faaac..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java +++ /dev/null @@ -1,278 +0,0 @@ -/******************************************************************************* - * 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 - *******************************************************************************/ -package org.eclipse.swt.dnd; - -import org.eclipse.swt.*; -import org.eclipse.swt.graphics.*; -import org.eclipse.swt.internal.win32.*; -import org.eclipse.swt.widgets.*; - -/** - * This class provides a default drag under effect (eg. select, insert, scroll and expand) - * when a drag occurs over a <code>Tree</code>. - * - * <p>Classes that wish to provide their own drag under effect for a <code>Tree</code> - * can extend the <code>TreeDropTargetEffect</code> class and override any applicable methods - * in <code>TreeDropTargetEffect</code> to display their own drag under effect.</p> - * - * Subclasses that override any methods of this class must call the corresponding - * <code>super</code> method to get the default drag under effect implementation. - * - * <p>The feedback value is either one of the FEEDBACK constants defined in - * class <code>DND</code> which is applicable to instances of this class, - * or it must be built by <em>bitwise OR</em>'ing together - * (that is, using the <code>int</code> "|" operator) two or more - * of those <code>DND</code> effect constants. - * </p> - * <p> - * <dl> - * <dt><b>Feedback:</b></dt> - * <dd>FEEDBACK_SELECT, FEEDBACK_INSERT_BEFORE, FEEDBACK_INSERT_AFTER, FEEDBACK_EXPAND, FEEDBACK_SCROLL</dd> - * </dl> - * </p><p> - * Note: Only one of the styles FEEDBACK_SELECT, FEEDBACK_INSERT_BEFORE or - * FEEDBACK_INSERT_AFTER may be specified. - * </p> - * - * @see DropTargetAdapter - * @see DropTargetEvent - * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> - * - * @since 3.3 - */ -public class TreeDropTargetEffect extends DropTargetEffect { - static final int SCROLL_HYSTERESIS = 200; // milli seconds - static final int EXPAND_HYSTERESIS = 1000; // milli seconds - - int /*long*/ dropIndex; - int /*long*/ scrollIndex; - long scrollBeginTime; - int /*long*/ expandIndex; - long expandBeginTime; - TreeItem insertItem; - boolean insertBefore; - - /** - * Creates a new <code>TreeDropTargetEffect</code> to handle the drag under effect on the specified - * <code>Tree</code>. - * - * @param tree the <code>Tree</code> over which the user positions the cursor to drop the data - */ - public TreeDropTargetEffect(Tree tree) { - super(tree); - } - - int checkEffect(int effect) { - // Some effects are mutually exclusive. Make sure that only one of the mutually exclusive effects has been specified. - if ((effect & DND.FEEDBACK_SELECT) != 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER & ~DND.FEEDBACK_INSERT_BEFORE; - if ((effect & DND.FEEDBACK_INSERT_BEFORE) != 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER; - return effect; - } - - /** - * This implementation of <code>dragEnter</code> provides a default drag under effect - * for the feedback specified in <code>event.feedback</code>. - * - * For additional information see <code>DropTargetAdapter.dragEnter</code>. - * - * Subclasses that override this method should call <code>super.dragEnter(event)</code> - * to get the default drag under effect implementation. - * - * @param event the information associated with the drag enter event - * - * @see DropTargetAdapter - * @see DropTargetEvent - */ - public void dragEnter(DropTargetEvent event) { - dropIndex = -1; - insertItem = null; - expandBeginTime = 0; - expandIndex = -1; - scrollBeginTime = 0; - scrollIndex = -1; - } - - /** - * This implementation of <code>dragLeave</code> provides a default drag under effect - * for the feedback specified in <code>event.feedback</code>. - * - * For additional information see <code>DropTargetAdapter.dragLeave</code>. - * - * Subclasses that override this method should call <code>super.dragLeave(event)</code> - * to get the default drag under effect implementation. - * - * @param event the information associated with the drag leave event - * - * @see DropTargetAdapter - * @see DropTargetEvent - */ - public void dragLeave(DropTargetEvent event) { - Tree tree = (Tree) control; - int /*long*/ handle = tree.handle; - if (dropIndex != -1) { - TVITEM tvItem = new TVITEM (); - tvItem.hItem = dropIndex; - tvItem.mask = OS.TVIF_STATE; - tvItem.stateMask = OS.TVIS_DROPHILITED; - tvItem.state = 0; - OS.SendMessage (handle, OS.TVM_SETITEM, 0, tvItem); - dropIndex = -1; - } - if (insertItem != null) { - tree.setInsertMark(null, false); - insertItem = null; - } - expandBeginTime = 0; - expandIndex = -1; - scrollBeginTime = 0; - scrollIndex = -1; - } - - /** - * This implementation of <code>dragOver</code> provides a default drag under effect - * for the feedback specified in <code>event.feedback</code>. - * - * For additional information see <code>DropTargetAdapter.dragOver</code>. - * - * Subclasses that override this method should call <code>super.dragOver(event)</code> - * to get the default drag under effect implementation. - * - * @param event the information associated with the drag over event - * - * @see DropTargetAdapter - * @see DropTargetEvent - * @see DND#FEEDBACK_SELECT - * @see DND#FEEDBACK_INSERT_BEFORE - * @see DND#FEEDBACK_INSERT_AFTER - * @see DND#FEEDBACK_SCROLL - */ - public void dragOver(DropTargetEvent event) { - Tree tree = (Tree) getControl(); - int effect = checkEffect(event.feedback); - int /*long*/ handle = tree.handle; - Point coordinates = new Point(event.x, event.y); - coordinates = tree.toControl(coordinates); - TVHITTESTINFO lpht = new TVHITTESTINFO (); - lpht.x = coordinates.x; - lpht.y = coordinates.y; - OS.SendMessage (handle, OS.TVM_HITTEST, 0, lpht); - int /*long*/ hItem = lpht.hItem; - if ((effect & DND.FEEDBACK_SCROLL) == 0) { - scrollBeginTime = 0; - scrollIndex = -1; - } else { - if (hItem != -1 && scrollIndex == hItem && scrollBeginTime != 0) { - if (System.currentTimeMillis() >= scrollBeginTime) { - int /*long*/ topItem = OS.SendMessage(handle, OS.TVM_GETNEXTITEM, OS.TVGN_FIRSTVISIBLE, 0); - int /*long*/ nextItem = OS.SendMessage(handle, OS.TVM_GETNEXTITEM, hItem == topItem ? OS.TVGN_PREVIOUSVISIBLE : OS.TVGN_NEXTVISIBLE, hItem); - boolean scroll = true; - if (hItem == topItem) { - scroll = nextItem != 0; - } else { - RECT itemRect = new RECT (); - if (OS.TreeView_GetItemRect (handle, nextItem, itemRect, true)) { - RECT rect = new RECT (); - OS.GetClientRect (handle, rect); - POINT pt = new POINT (); - pt.x = itemRect.left; - pt.y = itemRect.top; - if (OS.PtInRect (rect, pt)) { - pt.y = itemRect.bottom; - if (OS.PtInRect (rect, pt)) scroll = false; - } - } - } - if (scroll) { - OS.SendMessage (handle, OS.TVM_ENSUREVISIBLE, 0, nextItem); - tree.redraw(); - } - scrollBeginTime = 0; - scrollIndex = -1; - } - } else { - scrollBeginTime = System.currentTimeMillis() + SCROLL_HYSTERESIS; - scrollIndex = hItem; - } - } - if ((effect & DND.FEEDBACK_EXPAND) == 0) { - expandBeginTime = 0; - expandIndex = -1; - } else { - if (hItem != -1 && expandIndex == hItem && expandBeginTime != 0) { - if (System.currentTimeMillis() >= expandBeginTime) { - if (OS.SendMessage (handle, OS.TVM_GETNEXTITEM, OS.TVGN_CHILD, hItem) != 0) { - TreeItem item = (TreeItem)tree.getDisplay().findWidget(tree.handle, hItem); - if (item != null && !item.getExpanded()) { - item.setExpanded(true); - tree.redraw(); - Event expandEvent = new Event (); - expandEvent.item = item; - tree.notifyListeners(SWT.Expand, expandEvent); - } - } - expandBeginTime = 0; - expandIndex = -1; - } - } else { - expandBeginTime = System.currentTimeMillis() + EXPAND_HYSTERESIS; - expandIndex = hItem; - } - } - if (dropIndex != -1 && (dropIndex != hItem || (effect & DND.FEEDBACK_SELECT) == 0)) { - TVITEM tvItem = new TVITEM (); - tvItem.hItem = dropIndex; - tvItem.mask = OS.TVIF_STATE; - tvItem.stateMask = OS.TVIS_DROPHILITED; - tvItem.state = 0; - OS.SendMessage (handle, OS.TVM_SETITEM, 0, tvItem); - dropIndex = -1; - } - if (hItem != -1 && hItem != dropIndex && (effect & DND.FEEDBACK_SELECT) != 0) { - TVITEM tvItem = new TVITEM (); - tvItem.hItem = hItem; - tvItem.mask = OS.TVIF_STATE; - tvItem.stateMask = OS.TVIS_DROPHILITED; - tvItem.state = OS.TVIS_DROPHILITED; - OS.SendMessage (handle, OS.TVM_SETITEM, 0, tvItem); - dropIndex = hItem; - } - if ((effect & DND.FEEDBACK_INSERT_BEFORE) != 0 || (effect & DND.FEEDBACK_INSERT_AFTER) != 0) { - boolean before = (effect & DND.FEEDBACK_INSERT_BEFORE) != 0; - /* - * Bug in Windows. When TVM_SETINSERTMARK is used to set - * an insert mark for a tree and an item is expanded or - * collapsed near the insert mark, the tree does not redraw - * the insert mark properly. The fix is to hide and show - * the insert mark whenever an item is expanded or collapsed. - * Since the insert mark can not be queried from the tree, - * use the Tree API rather than calling the OS directly. - */ - TreeItem item = (TreeItem)tree.getDisplay().findWidget(tree.handle, hItem); - if (item != null) { - if (item != insertItem || before != insertBefore) { - tree.setInsertMark(item, before); - } - insertItem = item; - insertBefore = before; - } else { - if (insertItem != null) { - tree.setInsertMark(null, false); - } - insertItem = null; - } - } else { - if (insertItem != null) { - tree.setInsertMark(null, false); - } - insertItem = null; - } - } -} |