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origin.js
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origin.js
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/**
* Copyright (c) 2014 Famous Industries, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* @license MIT
*/
/**
* Modifier with origin
* --------------------
*
* Modifiers have an origin property which affects the positioning
* of children in the render tree. By default, modifiers have an
* origin of [0, 0], which means child nodes are positioned at the top left of
* the last defined size (defaulting to the window's size). By modifying origin,
* child nodes can be layed out relative to a different origin (such as the center)
* of their parent's size context. This is similar in spirit to how the CSS float
* property behaves.
*
* Famo.us will internally ensure consistency of size and origin even when
* the window is resized, or a mobile device changes its orientation.
*
* In the example below, nine surfaces are placed inside of a Famo.us context,
* sized of the entire window (by default). By modifying origins, these surfaces
* can be layed out at key positions of their sizing context.
*
*/
define(function(require, exports, module) {
var Engine = require("famous/core/Engine");
var Surface = require("famous/core/Surface");
var Modifier = require("famous/core/Modifier");
var mainContext = Engine.createContext();
var origins = [
[ 0, 0],
[.5, 0],
[ 1, 0],
[ 0, .5],
[.5, .5],
[ 1, .5],
[ 0, 1],
[.5, 1],
[ 1, 1]
];
var originKey = 0;
var modifier = new Modifier({
origin: function() {
return origins[originKey];
}
});
var surface = new Surface({
size: [100, 100],
content: '[0, 0]',
classes: ['red-bg'],
properties: {
lineHeight: '100px',
textAlign: 'center'
}
});
var node = mainContext.add(new Modifier({align: [.5, .5]}));
node.add(new Modifier({origin: [.5, .5]})).add(new Surface({size: [4, 4], properties: {backgroundColor: 'black'}}));
node.add(modifier).add(surface);
Engine.on('click', function() {
originKey = ++originKey % origins.length;
surface.setContent(origins[originKey]);
})
});