devextreme/viz/tree_map/hover.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (viz/tree_map/hover.js)
 * Version: 20.1.7
 * Build date: Tue Aug 25 2020
 *
 * Copyright (c) 2012 - 2020 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;
var nodeProto = require("./node").prototype;
var expand = require("../core/helpers").expand;
var common = require("./common");
var _parseScalar = require("../core/utils").parseScalar;
var _buildRectAppearance = common.buildRectAppearance;
var STATE_CODE = 1;
require("./api");
require("./states");
proto._eventsMap.onHoverChanged = {
    name: "hoverChanged"
};
expand(proto._handlers, "calculateAdditionalStates", function(states, options) {
    states[1] = options.hoverStyle ? _buildRectAppearance(options.hoverStyle) : {}
});
require("./tree_map.base").addChange({
    code: "HOVER_ENABLED",
    handler: function() {
        var hoverEnabled = _parseScalar(this._getOption("hoverEnabled", true), true);
        if (!hoverEnabled) {
            this.clearHover()
        }
        this._hoverEnabled = hoverEnabled
    },
    isThemeDependent: true,
    isOptionChange: true,
    option: "hoverEnabled"
});
nodeProto.statesMap[1] = 1;
nodeProto.additionalStates.push(1);
expand(proto, "_extendProxyType", function(proto) {
    var that = this;
    proto.setHover = function() {
        that._hoverNode(this._id)
    };
    proto.isHovered = function() {
        return that._hoverIndex === this._id
    }
});
expand(proto, "_onNodesCreated", function() {
    this._hoverIndex = -1
});
expand(proto, "_changeGroupSettings", function() {
    var that = this;
    that._groupHoverEnabled = _parseScalar(that._getOption("group").hoverEnabled, true);
    if (!that._groupHoverEnabled) {
        that.clearHover()
    }
});
proto._applyHoverState = function(index, state) {
    setNodeStateRecursive(this._nodes[index], STATE_CODE, state);
    this._eventTrigger("hoverChanged", {
        node: this._nodes[index].proxy
    })
};

function setNodeStateRecursive(node, code, state) {
    var nodes = node.isNode() && node.nodes;
    var i;
    var ii = nodes && nodes.length;
    node.setState(code, state);
    for (i = 0; i < ii; ++i) {
        setNodeStateRecursive(nodes[i], code, state)
    }
}
proto._hoverNode = function(index) {
    var that = this;
    var currentIndex = that._hoverIndex;
    if (that._hoverEnabled && currentIndex !== index) {
        if (!that._groupHoverEnabled && index >= 0 && that._nodes[index].isNode()) {
            that.clearHover();
            return
        }
        that._context.suspend();
        that._hoverIndex = -1;
        if (currentIndex >= 0) {
            that._applyHoverState(currentIndex, false)
        }
        that._hoverIndex = index;
        if (index >= 0) {
            that._applyHoverState(index, true)
        }
        that._context.resume()
    }
};
proto.clearHover = function() {
    this._hoverNode(-1)
};