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