litesoft
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// This Source Code is Copyright & Licenced as indicated below package org.litesoft.GWT.client.widgets.nonpublic.external; /* * Copyright 2007 Mat Gessel <mat.gessel@gmail.com> * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ /** * Contains information used by drag operations to position elements in the UI. * Different drag operations require different coordinates, so we pass all * coordinates to operations using this object. Also encapsulates coordinate * calulations. */ /* * Extends MouseEvent so that both types may be used polymorphically. For * example, a slider will process both mouse down and mouse drag (but not mouse * move). */ public class DragEvent extends MouseEvent { private static final long serialVersionUID = -60876731058183754L; private final int m_deltaX, m_deltaY; private final int m_cumulativeX, m_cumulativeY; /** * @param receiver the widget which is receiving the mouse event * @param mouseEvent a <code>mousedown</code>, <code>mousemove</code> or <code>mouseup</code> event * @param previousEvent */ public DragEvent( MouseEvent mouseMove, MouseEvent mouseDown, MouseEvent previousEvent ) { super( mouseMove ); if ( previousEvent != null ) { /* * Calculate the delta relative to the last event, adjusting for a * possibly moving coordinate space */ m_deltaX = mouseMove.getWidgetLeft() - previousEvent.getWidgetLeft() + mouseMove.getWidgetX() - previousEvent.getWidgetX(); m_deltaY = mouseMove.getWidgetTop() - previousEvent.getWidgetTop() + mouseMove.getWidgetY() - previousEvent.getWidgetY(); m_cumulativeX = mouseMove.getWidgetX() - mouseDown.getWidgetX(); m_cumulativeY = mouseMove.getWidgetY() - mouseDown.getWidgetY(); } else { m_deltaX = m_deltaY = 0; m_cumulativeX = m_cumulativeY = 0; } } /** * Get the distance moved horizontally, relative to the last event. Returns * a useful value even if the document is scrolled or the widget has moved * since the last event. */ public int getDeltaX() { return m_deltaX; } /** * Get the distance moved vertically, relative to the last event. Returns * a useful value even if the document is scrolled or the widget has moved * since the last event. */ public int getDeltaY() { return m_deltaY; } public int getCumulativeX() { return m_cumulativeX; } public int getCumulativeY() { return m_cumulativeY; } } |
Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/widgets/nonpublic/external/DragEvent.java
Revision | Author | Commited | Message |
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950 Diff | GeorgeS | Thu 19 Jun, 2014 17:57:04 +0000 | New Lines |
948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
151 Diff | GeorgeS | Thu 17 Mar, 2011 04:16:22 +0000 | |
49 Diff | GeorgeS | Mon 12 Apr, 2010 02:59:10 +0000 | License Text |
2 | GeorgeS | Sun 07 Feb, 2010 12:50:58 +0000 |