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92 lines
3.6 KiB
JavaScript
92 lines
3.6 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT Web is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT Web includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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/*global define*/
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define(
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[],
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function () {
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'use strict';
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/**
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* Handle for changing x/y position of a line's end point.
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* This is used to support drag handles for line elements
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* in a fixed position view. Field names for opposite ends
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* are provided to avoid zero-length lines.
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* @memberof platform/features/layout
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* @constructor
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* @param element the line element
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* @param {string} xProperty field which stores x position
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* @param {string} yProperty field which stores x position
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* @param {string} xOther field which stores x of other end
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* @param {string} yOther field which stores y of other end
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* @implements {platform/features/layout.ElementHandle}
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*/
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function LineHandle(element, xProperty, yProperty, xOther, yOther) {
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this.element = element;
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this.xProperty = xProperty;
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this.yProperty = yProperty;
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this.xOther = xOther;
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this.yOther = yOther;
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}
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LineHandle.prototype.x = function (value) {
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var element = this.element,
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xProperty = this.xProperty,
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yProperty = this.yProperty,
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xOther = this.xOther,
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yOther = this.yOther;
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if (arguments.length > 0) {
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// Ensure we stay in view
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value = Math.max(value, 0);
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// Make sure end points will still be different
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if (element[yOther] !== element[yProperty] ||
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element[xOther] !== value) {
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element[xProperty] = value;
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}
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}
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return element[xProperty];
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};
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LineHandle.prototype.y = function (value) {
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var element = this.element,
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xProperty = this.xProperty,
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yProperty = this.yProperty,
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xOther = this.xOther,
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yOther = this.yOther;
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if (arguments.length > 0) {
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// Ensure we stay in view
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value = Math.max(value, 0);
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// Make sure end points will still be different
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if (element[xOther] !== element[xProperty] ||
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element[yOther] !== value) {
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element[yProperty] = value;
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}
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}
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return element[yProperty];
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};
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return LineHandle;
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}
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);
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