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/*
* Copyright 2011 SWM Services GmbH.
*
* 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.
*/
package de.swm.commons.mobile.client.event;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.EventTarget;
import com.google.gwt.user.client.Event;
import de.swm.commons.mobile.client.utils.Point;
import de.swm.commons.mobile.client.utils.Utils;
import java.util.logging.Logger;
/**
* Drag controller for desktop devices.
*
*/
public class DragControllerDesktop extends DragController {
private static final Logger LOGGER = Logger.getLogger(DragControllerDesktop.class.getName());
/**
* Default constructor.
*/
public DragControllerDesktop() {
super();
LOGGER.info("New DragController-Desktop instance created");
}
@Override
protected void registerEvents() {
super.registerEvents();
if (getDragStartListener() == null) {
setDragStartListener(Utils.addEventListener(getSource().getElement(), "mousedown", true, this));
setDragMoveListener(Utils.addEventListener(getSource().getElement(), "mousemove", true, this));
setDragEndListener(Utils.addEventListener(getSource().getElement(), "mouseup", true, this));
}
}
@Override
protected void unregisterEvents() {
super.unregisterEvents();
if (getDragStartListener() != null) {
Utils.removeEventListener(getSource().getElement(), "mousedown", true, getDragStartListener());
Utils.removeEventListener(getSource().getElement(), "mousemove", true, getDragMoveListener());
Utils.removeEventListener(getSource().getElement(), "mouseup", true, getDragEndListener());
setDragStartListener(null);
setDragMoveListener(null);
setDragEndListener(null);
}
}
/**
* Will be invoked on Mouse down event.
*
* @param e
* event
*/
public void onMouseDown(Event e) {
EventTarget target = e.getEventTarget();
boolean preventDefault = true;
if (Element.is(target)) {
Element ele = Element.as(target);
// INPUT element will not get focus if default action is prevented.
if (Utils.isHtmlFormControl(ele)) {
ele.focus();
preventDefault = false;
}
}
if (preventDefault) {
if (!getOptions().isEnableNativeEventPropagation()) {
e.preventDefault(); // prevent default action of selecting text
e.stopPropagation();
}
onStart(e, new Point(e.getClientX(), e.getClientY()));
}
}
/**
* Will be invoked on Mouse move event.
*
* @param e
* event
*/
public void onMouseMove(Event e) {
if (!getOptions().isEnableNativeEventPropagation()) {
e.preventDefault(); // prevent default action of selecting text
e.stopPropagation();
}
onMove(e, new Point(e.getClientX(), e.getClientY()));
}
/**
* Will be invoked on Mouse up event.
* @param e event.
*/
public void onMouseUp(Event e) {
if (!getOptions().isEnableNativeEventPropagation()) {
e.preventDefault(); // prevent default action of selecting text
e.stopPropagation();
}
onEnd(e, new Point(e.getClientX(), e.getClientY()));
}
@Override
public void onBrowserEvent(Event e) {
String type = e.getType();
if (type.equals("mousedown")) {
onMouseDown(e);
} else if (type.equals("mousemove")) {
onMouseMove(e);
} else if (type.equals("mouseup")) {
onMouseUp(e);
} else {
super.onBrowserEvent(e);
}
}
}