devextreme/viz/core/layout_element.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (viz/core/layout_element.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 noop = require("../../core/utils/common").noop,
    _round = Math.round,
    objectUtils = require("../../core/utils/object"),
    defaultOffset = {
        horizontal: 0,
        vertical: 0
    },
    alignFactors = {
        center: .5,
        right: 1,
        bottom: 1,
        left: 0,
        top: 0
    };

function LayoutElement(options) {
    this._options = options
}
LayoutElement.prototype = {
    constructor: LayoutElement,
    position: function(options) {
        var that = this,
            ofBBox = options.of.getLayoutOptions(),
            myBBox = that.getLayoutOptions(),
            at = options.at,
            my = options.my,
            offset = options.offset || defaultOffset,
            shiftX = -alignFactors[my.horizontal] * myBBox.width + ofBBox.x + alignFactors[at.horizontal] * ofBBox.width + parseInt(offset.horizontal),
            shiftY = -alignFactors[my.vertical] * myBBox.height + ofBBox.y + alignFactors[at.vertical] * ofBBox.height + parseInt(offset.vertical);
        that.shift(_round(shiftX), _round(shiftY))
    },
    getLayoutOptions: noop
};

function WrapperLayoutElement(renderElement, bBox) {
    this._renderElement = renderElement;
    this._cacheBBox = bBox
}
var wrapperLayoutElementPrototype = WrapperLayoutElement.prototype = objectUtils.clone(LayoutElement.prototype);
wrapperLayoutElementPrototype.constructor = WrapperLayoutElement;
wrapperLayoutElementPrototype.getLayoutOptions = function() {
    return this._cacheBBox || this._renderElement.getBBox()
};
wrapperLayoutElementPrototype.shift = function(shiftX, shiftY) {
    var bBox = this.getLayoutOptions();
    this._renderElement.move(_round(shiftX - bBox.x), _round(shiftY - bBox.y))
};
exports.LayoutElement = LayoutElement;
exports.WrapperLayoutElement = WrapperLayoutElement;