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[FIX] Fill the sequence flow conditional start marker
This avoids seeing the sequence flow line over the marker at some zoom level. Implementation notes: - it requires custom code as mxgraph doesn't support filling the markers out of the box. - it is also applied to message flow markers without functional changes to prepare future changes (currently use transparent colors). - it is possible to change all marker fill colors as for other defaults.
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| * Copyright 2021 Bonitasoft S.A. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| import { mxgraph } from '../initializer'; | ||
| import { mxAbstractCanvas2D, mxPoint } from 'mxgraph'; | ||
| import { StyleIdentifier } from '../StyleUtils'; // for types | ||
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| /* eslint-disable @typescript-eslint/ban-ts-comment */ | ||
| export class BpmnConnector extends mxgraph.mxConnector { | ||
| constructor(points: mxPoint[], stroke: string, strokewidth?: number) { | ||
| super(points, stroke, strokewidth); | ||
| } | ||
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| paintEdgeShape(c: mxAbstractCanvas2D, pts: mxPoint[]): void { | ||
| // The indirection via functions for markers is needed in | ||
| // order to apply the offsets before painting the line and | ||
| // paint the markers after painting the line. | ||
| // @ts-ignore wrong type returned by [email protected] | ||
| const sourceMarker: () => void = this.createMarker(c, pts, true); | ||
| // @ts-ignore wrong type returned by [email protected] | ||
| const targetMarker: () => void = this.createMarker(c, pts, false); | ||
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| this.paintEdgeLine(c, pts); | ||
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| // Disables shadows, dashed styles | ||
| c.setShadow(false); | ||
| c.setDashed(false, false); | ||
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| if (sourceMarker != null) { | ||
| c.setFillColor(mxgraph.mxUtils.getValue(this.style, StyleIdentifier.EDGE_START_FILL_COLOR, this.stroke)); | ||
| sourceMarker(); | ||
| } | ||
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| if (targetMarker != null) { | ||
| c.setFillColor(mxgraph.mxUtils.getValue(this.style, StyleIdentifier.EDGE_END_FILL_COLOR, this.stroke)); | ||
| targetMarker(); | ||
| } | ||
| } | ||
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| // taken from mxPolyline, required as we cannot call mxPolyline method here (parent of the parent) | ||
| // we only support non STYLE_CURVED here (is possible with parent class) | ||
| private paintEdgeLine(c: mxAbstractCanvas2D, pts: mxPoint[]): void { | ||
| const prev = getPointerEventsValue(c); | ||
| setPointerEventsValue(c, 'stroke'); | ||
| this.paintLine(c, pts, this.isRounded); | ||
| setPointerEventsValue(c, prev); | ||
| } | ||
| } | ||
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| function getPointerEventsValue(c: mxAbstractCanvas2D): string { | ||
| return c instanceof mxgraph.mxSvgCanvas2D ? c.pointerEventsValue : null; | ||
| } | ||
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| function setPointerEventsValue(c: mxAbstractCanvas2D, value: string): void { | ||
| if (c instanceof mxgraph.mxSvgCanvas2D) { | ||
| c.pointerEventsValue = value; | ||
| } | ||
| } |