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/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of Motorola Mobility LLC nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
</copyright> */
/*global require, exports */
/**
@module montage/ui/check-input
@requires montage/ui/component
@requires montage/ui/native-control
@requires montage/ui/composer/press-composer
*/
var Montage = require("montage").Montage,
Component = require("ui/component").Component,
NativeControl = require("ui/native-control").NativeControl,
PressComposer = require("ui/composer/press-composer").PressComposer;
/**
The base class for the Checkbox component. You will not typically create this class directly but instead use the Checkbox component.
@class module:montage/ui/check-input.CheckInput
@extends module:montage/ui/native-control.NativeControl
@see module:"montage/ui/input-checkbox.reel".CheckBox
*/
var CheckInput = exports.CheckInput = Montage.create(NativeControl, {
// HTMLInputElement methods
blur: { value: function() { this._element.blur(); } },
focus: { value: function() { this._element.focus(); } },
// click() deliberately omitted, use checked = instead
// Callbacks
draw: {
value: function() {
// Call super
NativeControl.draw.call(this);
this._element.setAttribute("aria-checked", this._checked);
}
},
_pressComposer: {
enumerable: false,
value: null
},
prepareForActivationEvents: {
value: function() {
var pressComposer = this._pressComposer = PressComposer.create();
this.addComposer(pressComposer);
pressComposer.addEventListener("pressStart", this, false);
pressComposer.addEventListener("press", this, false);
}
},
prepareForDraw: {
enumerable: false,
value: function() {
this._element.addEventListener('change', this);
}
},
/**
Fake the checking of the element.
Changes the checked property of the element and dispatches a change event.
Radio button overrides this.
@private
*/
_fakeCheck: {
enumerable: false,
value: function() {
var changeEvent;
// NOTE: this may be BAD, modifying the element outside of
// the draw loop, but it's what a click/touch would
// actually have done
this._element.checked = !this._element.checked;
changeEvent = document.createEvent("HTMLEvents");
changeEvent.initEvent("change", true, true);
this._element.dispatchEvent(changeEvent);
}
},
/**
Stores if we need to "fake" checking of the input element.
When preventDefault is called on touchstart and touchend events (e.g. by
the scroller component) the checkbox doesn't check itself, so we need
to fake it later.
@default false
@private
*/
_shouldFakeCheck: {
enumerable: false,
value: false
},
// Handlers
handlePressStart: {
value: function(event) {
this._shouldFakeCheck = event.defaultPrevented;
}
},
handlePress: {
value: function(event) {
if (this._shouldFakeCheck) {
this._shouldFakeCheck = false;
this._fakeCheck();
}
}
},
handleChange: {
enumerable: false,
value: function(event) {
if (!this._pressComposer || this._pressComposer.state !== PressComposer.CANCELLED) {
Object.getPropertyDescriptor(this, "checked").set.call(this,
this.element.checked, true);
this._dispatchActionEvent();
}
}
}
});
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