devextreme/viz/tree_map/drilldown.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (viz/tree_map/drilldown.js)
 * Version: 18.1.3
 * Build date: Tue May 15 2018
 *
 * Copyright (c) 2012 - 2018 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
var proto = require("./tree_map.base").prototype,
    _expand = require("../core/helpers").expand;
require("./api");
proto._eventsMap.onDrill = {
    name: "drill"
};
_expand(proto, "_extendProxyType", function(proto) {
    var that = this;
    proto.drillDown = function() {
        that._drillToNode(this._id)
    }
});
_expand(proto, "_onNodesCreated", function() {
    this._drilldownIndex = -1
});
proto._drillToNode = function(index) {
    var node, that = this;
    if (that._drilldownIndex !== index) {
        node = that._nodes[index] || that._root;
        if (node.nodes) {
            that._drilldownIndex = index;
            that._topNode = node;
            that._context.suspend();
            that._context.change(["MAX_DEPTH", "NODES_RESET"]);
            that._context.resume();
            that._eventTrigger("drill", {
                node: node.proxy
            })
        }
    }
};
proto.resetDrillDown = function() {
    this._drillToNode(-1);
    return this
};
proto.drillUp = function() {
    this._drillToNode(this._topNode.parent._id || -1);
    return this
};
proto.getCurrentNode = function() {
    return this._topNode.proxy
};