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