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57 lines
1.5 KiB
57 lines
1.5 KiB
var util = require('../../util');
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var Group = require('./Group');
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/**
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* @constructor BackgroundGroup
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* @param {Number | String} groupId
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* @param {Object} data
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* @param {ItemSet} itemSet
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*/
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function BackgroundGroup (groupId, data, itemSet) {
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Group.call(this, groupId, data, itemSet);
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this.width = 0;
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this.height = 0;
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this.top = 0;
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this.left = 0;
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}
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BackgroundGroup.prototype = Object.create(Group.prototype);
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/**
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* Repaint this group
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* @param {{start: number, end: number}} range
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* @param {{item: {horizontal: number, vertical: number}, axis: number}} margin
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* @param {boolean} [restack=false] Force restacking of all items
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* @return {boolean} Returns true if the group is resized
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*/
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BackgroundGroup.prototype.redraw = function(range, margin, restack) {
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var resized = false;
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this.visibleItems = this._updateItemsInRange(this.orderedItems, this.visibleItems, range);
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// calculate actual size
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this.width = this.dom.background.offsetWidth;
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// apply new height (just always zero for BackgroundGroup
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this.dom.background.style.height = '0';
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// update vertical position of items after they are re-stacked and the height of the group is calculated
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for (var i = 0, ii = this.visibleItems.length; i < ii; i++) {
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var item = this.visibleItems[i];
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item.repositionY(margin);
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}
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return resized;
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};
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/**
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* Show this group: attach to the DOM
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*/
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BackgroundGroup.prototype.show = function() {
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if (!this.dom.background.parentNode) {
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this.itemSet.dom.background.appendChild(this.dom.background);
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}
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};
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module.exports = BackgroundGroup;
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