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/*
* Copyright (C) 2016 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
class Button extends LayoutItem
{
constructor(layoutDelegate)
{
super({
element: "<button />",
layoutDelegate
});
this._enabled = true;
if (GestureRecognizer.SupportsTouches)
this._tapGestureRecognizer = new TapGestureRecognizer(this.element, this);
else
this.element.addEventListener("click", this);
}
// Public
get enabled()
{
return this._enabled;
}
set enabled(flag)
{
if (this._enabled === flag)
return;
this._enabled = flag;
if (this.layoutDelegate && typeof this.layoutDelegate.layout === "function")
this.layoutDelegate.layout();
}
// Protected
handleEvent(event)
{
if (event.type === "click" && event.currentTarget === this.element)
this._notifyDelegateOfActivation();
}
gestureRecognizerStateDidChange(recognizer)
{
if (this._tapGestureRecognizer === recognizer && recognizer.state === GestureRecognizer.States.Recognized)
this._notifyDelegateOfActivation();
}
// Private
_notifyDelegateOfActivation()
{
if (this._enabled && this.uiDelegate && typeof this.uiDelegate.buttonWasPressed === "function")
this.uiDelegate.buttonWasPressed(this);
}
}
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