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74 lines
2.5 KiB
JavaScript
74 lines
2.5 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2014-2023, 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 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 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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import MCTChartSeriesElement from './MCTChartSeriesElement';
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export default class MCTChartLineStepAfter extends MCTChartSeriesElement {
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removePoint(index) {
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if (index > 0 && index / 2 < this.count) {
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this.buffer[index + 1] = this.buffer[index - 1];
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}
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}
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vertexCountForPointAtIndex(index) {
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if (index === 0 && this.count === 0) {
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return 2;
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}
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return 4;
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}
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startIndexForPointAtIndex(index) {
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if (index === 0) {
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return 0;
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}
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return 2 + (index - 1) * 4;
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}
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addPoint(point, start) {
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if (start === 0 && this.count === 0) {
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// First point is easy.
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this.buffer[start] = point.x;
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this.buffer[start + 1] = point.y; // one point
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} else if (start === 0 && this.count > 0) {
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// Unshifting requires adding an extra point.
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this.buffer[start] = point.x;
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this.buffer[start + 1] = point.y;
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this.buffer[start + 2] = this.buffer[start + 4];
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this.buffer[start + 3] = point.y;
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} else {
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// Appending anywhere in line, insert standard two points.
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this.buffer[start] = point.x;
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this.buffer[start + 1] = this.buffer[start - 1];
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this.buffer[start + 2] = point.x;
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this.buffer[start + 3] = point.y;
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if (start < this.count * 2) {
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// Insert into the middle, need to update the following
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// point.
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this.buffer[start + 5] = point.y;
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}
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}
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}
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}
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