Center.html
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<!DOCTYPE html>
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<pre class="prettyprint lang-js"><span id='Ext-ux-layout-Center'>/**
</span> * This layout manager is used to center contents within a container. As a subclass of
* {@link Ext.layout.container.Fit fit layout}, CenterLayout expects to have one child
* item; multiple items will be placed overlapping. The layout does not require any config
* options. Items in the container can use percentage width or height rather than be fit
* to the full size of the container.
*
* Example usage:
*
* // The content panel is centered in the container
*
* var p = Ext.create('Ext.Panel', {
* title: 'Center Layout',
* layout: 'ux.center',
* items: [{
* title: 'Centered Content',
* width: '75%', // assign 75% of the container width to the item
* html: 'Some content'
* }]
* });
*
* If you leave the title blank and specify no border you can create a non-visual, structural
* container just for centering the contents.
*
* var p = Ext.create('Ext.Container', {
* layout: 'ux.center',
* items: [{
* title: 'Centered Content',
* width: 300,
* height: '90%', // assign 90% of the container height to the item
* html: 'Some content'
* }]
* });
*/
Ext.define('Ext.ux.layout.Center', {
extend: 'Ext.layout.container.Fit',
alias: 'layout.ux.center',
percentRe: /^\d+(?:\.\d+)?\%$/,
itemCls: 'ux-layout-center-item',
initLayout: function () {
this.callParent(arguments);
this.owner.addCls('ux-layout-center');
},
getItemSizePolicy: function (item) {
var policy = this.callParent(arguments);
if (typeof item.width == 'number') {
policy = this.sizePolicies[policy.setsHeight ? 2 : 0];
}
return policy;
},
getPos: function (itemContext, info, dimension) {
var size = itemContext.props[dimension] + info.margins[dimension],
pos = Math.round((info.targetSize[dimension] - size) / 2);
return Math.max(pos, 0);
},
getSize: function (item, info, dimension) {
var ratio = item[dimension];
if (typeof ratio == 'string' && this.percentRe.test(ratio)) {
ratio = parseFloat(ratio) / 100;
} else {
ratio = item[dimension + 'Ratio']; // backwards compat
}
return info.targetSize[dimension] * (ratio || 1) - info.margins[dimension];
},
positionItemX: function (itemContext, info) {
var left = this.getPos(itemContext, info, 'width');
itemContext.setProp('x', left);
},
positionItemY: function (itemContext, info) {
var top = this.getPos(itemContext, info, 'height');
itemContext.setProp('y', top);
},
setItemHeight: function (itemContext, info) {
var height = this.getSize(itemContext.target, info, 'height');
itemContext.setHeight(height);
},
setItemWidth: function (itemContext, info) {
var width = this.getSize(itemContext.target, info, 'width');
itemContext.setWidth(width);
}
});
</pre>
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