@qooxdoo/framework
Version:
The JS Framework for Coders
176 lines (143 loc) • 4.52 kB
JavaScript
/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2011 1&1 Internet AG, Germany, http://www.1und1.de
License:
MIT: https://opensource.org/licenses/MIT
See the LICENSE file in the project's top-level directory for details.
Authors:
* Tino Butz (tbtz)
************************************************************************ */
/**
* This class provides the <code>domupdated</code> event. The event is
* delegated to all widget instances that have a
* listener for the <code>domupdated</code> event registered.
*
* @internal
*/
qx.Class.define("qx.ui.mobile.core.DomUpdatedHandler", {
extend: qx.core.Object,
implement: qx.event.IEventHandler,
/*
*****************************************************************************
CONSTRUCTOR
*****************************************************************************
*/
/**
* Create a new instance
*
* @param manager {qx.event.Manager} Event manager for the window to use
*/
construct(manager) {
super();
this.__manager = manager;
this.__targets = {};
// Register
qx.ui.mobile.core.DomUpdatedHandler.__instances[this.toHashCode()] = this;
},
/*
*****************************************************************************
STATICS
*****************************************************************************
*/
statics: {
/** @type {Integer} Priority of this handler */
PRIORITY: qx.event.Registration.PRIORITY_NORMAL,
/** @type {Map} Supported event types */
SUPPORTED_TYPES: {
domupdated: 1
},
/** @type {Integer} Whether the method "canHandleEvent" must be called */
IGNORE_CAN_HANDLE: false,
/** @type {Map} Stores all domUpdated manager instances */
__instances: {},
/**
* Informs all handlers. Useful after massive DOM manipulations e.g.
* through {@link qx.ui.mobile.core.Widget}.
*
*/
refresh() {
var all = this.__instances;
for (var hash in all) {
all[hash].refresh();
}
}
},
/*
*****************************************************************************
MEMBERS
*****************************************************************************
*/
members: {
__manager: null,
__targets: null,
/*
---------------------------------------------------------------------------
EVENT HANDLER INTERFACE
---------------------------------------------------------------------------
*/
// interface implementation
canHandleEvent(target, type) {
return target instanceof qx.ui.mobile.core.Widget;
},
// interface implementation
registerEvent(target, type, capture) {
var hash = target.toHashCode();
var targets = this.__targets;
if (targets && !targets[hash]) {
targets[hash] = target;
}
},
// interface implementation
unregisterEvent(target, type, capture) {
var hash = target.toHashCode();
var targets = this.__targets;
if (!targets) {
return;
}
if (targets[hash]) {
delete targets[hash];
}
},
/*
---------------------------------------------------------------------------
USER ACCESS
---------------------------------------------------------------------------
*/
/**
* This method is called by all DOM tree modifying routines
* to inform the widgets.
*
*/
refresh() {
var targets = this.__targets;
var target;
for (var hash in targets) {
target = targets[hash];
if (target && !target.$$disposed && target.isSeeable()) {
var evt = qx.event.Registration.createEvent("domupdated");
this.__manager.dispatchEvent(target, evt);
}
}
}
},
/*
*****************************************************************************
DESTRUCTOR
*****************************************************************************
*/
destruct() {
this.__manager = this.__targets = null;
// Deregister
delete qx.ui.mobile.core.DomUpdatedHandler.__instances[this.toHashCode()];
},
/*
*****************************************************************************
DEFER
*****************************************************************************
*/
defer(statics) {
qx.event.Registration.addHandler(statics);
}
});