/*
* Copyright (c) 2010 Zhihua (Dennis) Jiang
*
* 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 com.gwtmobile.ui.client.event;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.EventTarget;
import com.google.gwt.user.client.Event;
import com.gwtmobile.ui.client.utils.Point;
import com.gwtmobile.ui.client.utils.Utils;
public class DragControllerMobile extends DragController {
protected boolean _touchMoving = false;
static protected boolean _stopPropagation = true;
protected Element _touchTarget = null;
DragControllerMobile() {
}
@Override
protected void registerEvents() {
super.registerEvents();
if (_dragStartListener == null) {
_dragStartListener = Utils.addEventListener(_source.getElement(), "touchstart", true, this);
_dragMoveListener = Utils.addEventListener(_source.getElement(), "touchmove", true, this);
_dragEndListener = Utils.addEventListener(_source.getElement(), "touchend", true, this);
}
}
@Override
protected void unregisterEvents() {
super.unregisterEvents();
if (_dragStartListener != null) {
Utils.removeEventListener(_source.getElement(), "touchstart", true, _dragStartListener);
Utils.removeEventListener(_source.getElement(), "touchmove", true, _dragMoveListener);
Utils.removeEventListener(_source.getElement(), "touchend", true, _dragEndListener);
_dragStartListener = _dragMoveListener = _dragEndListener = null;
}
}
public void onTouchStart(TouchEvent 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;
}
_touchTarget = ele;
}
else {
_touchTarget = null;
}
if (preventDefault && _stopPropagation) {
e.preventDefault(); //prevent default action of selecting text
e.stopPropagation();
}
//FIXME: for multi-touch platforms.
onStart(e, new Point(e.touches().get(0).getClientX(), e.touches().get(0).getClientY()));
}
public void onTouchMove(TouchEvent e) {
if (_stopPropagation) {
e.preventDefault();
e.stopPropagation();
}
_touchMoving = true;
onMove(e, new Point(e.touches().get(0).getClientX(), e.touches().get(0).getClientY()));
}
public void onTouchEnd(TouchEvent e) {
if (_stopPropagation) {
e.preventDefault();
e.stopPropagation();
}
if (!_touchMoving) {
Utils.Console("fireclick ");
if (_touchTarget != null) {
fireClick(_touchTarget);
}
}
_touchMoving = false;
onEnd(e, new Point(e.changedTouches().get(0).getClientX(), e.changedTouches().get(0).getClientY()));
}
@Override
public void onBrowserEvent(Event e) {
String type = e.getType();
if (type.equals("touchstart")) {
onTouchStart((TouchEvent)e);
}
else if (type.equals("touchmove")) {
onTouchMove((TouchEvent)e);
}
else if (type.equals("touchend")) {
onTouchEnd((TouchEvent)e);
}
else {
super.onBrowserEvent(e);
}
}
/**
* Sets the stop propagation. For widgets such as pan and zoom maps.
*
* @author Frank Mena
*/
public void setStopPropagation() {
_stopPropagation = true;
}
public void setStartPropagation() {
_stopPropagation = false;
}
protected native void fireClick(Element theTarget) /*-{
// http://stackoverflow.com/questions/7184573/pick-up-the-android-version-in-the-browser-by-javascript
var ua = $wnd.navigator.userAgent;
if( ua.indexOf("Android") >= 0 ) {
var androidversion = parseFloat(ua.slice(ua.indexOf("Android")+8));
if (androidversion >= 4.1) {
// http://code.google.com/p/android/issues/detail?id=38808
return;
}
}
if (theTarget.nodeType == 3) theTarget = theTarget.parentNode;
var theEvent = $doc.createEvent('MouseEvents');
theEvent.initEvent('click', true, true);
theTarget.dispatchEvent(theEvent);
}-*/;
}