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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/TableDropTargetEffect.java')
-rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/TableDropTargetEffect.java | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/TableDropTargetEffect.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/TableDropTargetEffect.java deleted file mode 100644 index 72a6f563bc..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/motif/org/eclipse/swt/dnd/TableDropTargetEffect.java +++ /dev/null @@ -1,217 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 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.events.*; -import org.eclipse.swt.graphics.*; -import org.eclipse.swt.widgets.*; - -/** - * This class provides a default drag under effect (eg. select, insert and scroll) - * when a drag occurs over a <code>Table</code>. - * - * <p>Classes that wish to provide their own drag under effect for a <code>Table</code> - * can extend the <code>TableDropTargetEffect</code> and override any applicable methods - * in <code>TableDropTargetEffect</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_SCROLL</dd> - * </dl> - * </p> - * - * @see DropTargetAdapter - * @see DropTargetEvent - * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> - * - * @since 3.3 - */ -public class TableDropTargetEffect extends DropTargetEffect { - static final int SCROLL_HYSTERESIS = 150; // milli seconds - - int currentEffect = DND.FEEDBACK_NONE; - TableItem currentItem; - - PaintListener paintListener; - TableItem dropSelection = null; - - TableItem scrollItem; - long scrollBeginTime; - - /** - * Creates a new <code>TableDropTargetEffect</code> to handle the drag under effect on the specified - * <code>Table</code>. - * - * @param table the <code>Table</code> over which the user positions the cursor to drop the data - */ - public TableDropTargetEffect(Table table) { - super(table); - } - - 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) { - scrollBeginTime = 0; - scrollItem = null; - currentItem = null; - dropSelection = null; - } - - /** - * 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) { - Table table = (Table) control; - if (currentItem != null) { - setDropSelection(table, null); - currentItem = null; - } - scrollBeginTime = 0; - scrollItem = null; - } - - /** - * This implementation of <code>dragOver</code> provides a default drag under effect - * for the feedback specified in <code>event.feedback</code>. The class description - * lists the FEEDBACK constants that are applicable to the class. - * - * 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_SCROLL - */ - public void dragOver(DropTargetEvent event) { - Table table = (Table) control; - int effect = checkEffect(event.feedback); - TableItem item = (TableItem)getItem(table, event.x, event.y); - - if ((effect & DND.FEEDBACK_SCROLL) == 0) { - scrollBeginTime = 0; - scrollItem = null; - } else { - if (item != null && item.equals(scrollItem) && scrollBeginTime != 0) { - if (System.currentTimeMillis() >= scrollBeginTime) { - Rectangle area = table.getClientArea(); - int headerHeight = table.getHeaderHeight(); - int itemHeight= table.getItemHeight(); - Point pt = new Point(event.x, event.y); - pt = table.getDisplay().map(null, table, pt); - TableItem nextItem = null; - if (pt.y < area.y + headerHeight + 2 * itemHeight) { - int index = Math.max(0, table.indexOf(item)-1); - nextItem = table.getItem(index); - } - if (pt.y > area.y + area.height - 2 * itemHeight) { - int index = Math.min(table.getItemCount()-1, table.indexOf(item)+1); - nextItem = table.getItem(index); - } - if (nextItem != null) table.showItem(nextItem); - scrollBeginTime = 0; - scrollItem = null; - } - } else { - scrollBeginTime = System.currentTimeMillis() + SCROLL_HYSTERESIS; - scrollItem = item; - } - } - - if ((effect & DND.FEEDBACK_SELECT) != 0) { - if (currentItem != item || (currentEffect & DND.FEEDBACK_SELECT) == 0) { - setDropSelection(table, item); - currentEffect = effect; - currentItem = item; - } - } else { - setDropSelection(table, null); - } - } - - void setDropSelection (Table table, TableItem item) { - if (item == dropSelection) return; - if (dropSelection != null && !dropSelection.isDisposed()) { - Rectangle bounds = dropSelection.getBounds(0); - table.redraw(bounds.x, bounds.y, bounds.width, bounds.height, true); - } - dropSelection = item; - if (dropSelection != null && !dropSelection.isDisposed()) { - Rectangle bounds = dropSelection.getBounds(0); - table.redraw(bounds.x, bounds.y, bounds.width, bounds.height, true); - } - if (dropSelection == null) { - if (paintListener != null) { - table.removePaintListener(paintListener); - paintListener = null; - } - } else { - if (paintListener == null) { - paintListener = new PaintListener() { - public void paintControl(PaintEvent e) { - if (dropSelection == null || dropSelection.isDisposed()) return; - GC gc = e.gc; - boolean xor = gc.getXORMode(); - gc.setXORMode(true); - Rectangle bounds = dropSelection.getBounds(0); - gc.fillRectangle(bounds.x, bounds.y, bounds.width, bounds.height); - gc.setXORMode(xor); - } - }; - table.addPaintListener(paintListener); - } - } - } -} |