ngx-diagrams
Version:
> Light Weight, Modular, Typed Diagram Engine for Angular
110 lines • 20 kB
JavaScript
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, ViewChild, ViewContainerRef } from '@angular/core';
import { combineLatest } from 'rxjs';
import { filter, takeUntil } from 'rxjs/operators';
import { createValueState } from '../../../state/state';
import { generateCurvePath, generateDynamicPath } from '../../../utils/tool-kit.util';
import { DefaultLinkModel } from '../../models/default-link.model';
export class DefaultLinkComponent extends DefaultLinkModel {
constructor(cdRef) {
super({ type: 'ngdx-default-link' });
this.cdRef = cdRef;
this.path$ = createValueState(null, this.entityPipe('path'));
this.points$ = createValueState([], this.entityPipe('points'));
}
trackByPoints(i, point) {
return point.id;
}
ngOnInit() {
if (this.diagramEngine.getSmartRouting()) {
this.pathFinding = this.diagramEngine.getPathfinding();
}
}
ngAfterViewInit() {
const firstPCoords$ = this.getFirstPoint().selectCoords();
const lastPCoords$ = this.getLastPoint().selectCoords();
// Observe link coords and update drawing accordingly
combineLatest([firstPCoords$, lastPCoords$])
.pipe(takeUntil(this.onEntityDestroy()))
.subscribe(([firstPCoords, lastPCoords]) => {
const points = [firstPCoords, lastPCoords];
if (this.diagramEngine.getSmartRouting()) {
// first step: calculate a direct path between the points being linked
const directPathCoords = this.pathFinding.calculateDirectPath(firstPCoords, lastPCoords);
const routingMatrix = this.diagramEngine.getRoutingMatrix();
// now we need to extract, from the routing matrix, the very first walkable points
// so they can be used as origin and destination of the link to be created
const smartLink = this.pathFinding.calculateLinkStartEndCoords(routingMatrix, directPathCoords);
if (smartLink) {
const { start, end, pathToStart, pathToEnd } = smartLink;
// second step: calculate a path avoiding hitting other elements
const simplifiedPath = this.pathFinding.calculateDynamicPath(routingMatrix, start, end, pathToStart, pathToEnd);
const smartPath = generateDynamicPath(simplifiedPath);
this.path$.set(smartPath).emit();
}
}
else {
// handle regular links
// draw the smoothing
// if the points are too close, just draw a straight line
const isHorizontal = Math.abs(firstPCoords.x - lastPCoords.x) > Math.abs(firstPCoords.y - lastPCoords.y);
const xOrY = isHorizontal ? 'x' : 'y';
let isStraight = false;
if (Math.abs(points[0][xOrY] - points[1][xOrY]) < 50) {
isStraight = true;
}
const path = generateCurvePath(firstPCoords, lastPCoords, isStraight ? 0 : this.curvyness);
this.path$.set(path).emit();
}
const label = this.getLabel();
// update label position
if (label) {
label.setCoords(this.calcCenterOfPath(firstPCoords, lastPCoords));
// TODO: check whether we want the label to rotate along with the line
// label.setRotation(this.calcLabelIncline(firstPCoords, lastPCoords));
}
// TODO: handle the multiple lines in between the points
// https://github.com/projectstorm/react-diagrams/blob/master/src/defaults/widgets/DefaultLinkWidget.tsx#L344-L371
this.cdRef.detectChanges();
});
// observe link label and draw/remove accordingly
this.selectLabel()
.pipe(filter(Boolean))
.subscribe((label) => {
this.diagramEngine.generateWidgetForLabel(label, this.labelLayer);
this.cdRef.detectChanges();
});
}
calcLabelIncline(firstPoint, secondPoint) {
const dy = secondPoint.y - firstPoint.y;
const dx = secondPoint.x - firstPoint.x;
if (dx === 0) {
return 0;
}
let inclineAngel = (Math.atan(dy / dx) * 180) / Math.PI;
if (inclineAngel < 0) {
inclineAngel += 180;
}
return inclineAngel;
}
calcCenterOfPath(firstPoint, secondPoint) {
return { x: (firstPoint.x + secondPoint.x) / 2 + 20, y: (firstPoint.y + secondPoint.y) / 2 + 20 };
}
selectPath() {
return this.path$.value$;
}
}
DefaultLinkComponent.decorators = [
{ type: Component, args: [{
selector: 'ngdx-default-link',
template: "<!-- Label Host -->\n<ng-template #labelLayer></ng-template>\n\n<svg class=\"link-container\">\n <!-- Link -->\n <g [id]=\"id\">\n <path\n [attr.stroke-width]=\"width\"\n [attr.stroke]=\"selectColor() | async\"\n [attr.d]=\"selectPath() | async\"\n class=\"default-link\"\n (mouseleave)=\"setHovered(false)\"\n (mouseenter)=\"setHovered()\"\n [ngClass]=\"{ hovered: selectHovered() | async }\"\n ></path>\n <path\n class=\"default-link\"\n (mouseleave)=\"setHovered(false)\"\n (mouseenter)=\"setHovered()\"\n [attr.stroke-width]=\"20\"\n [attr.stroke]=\"selectColor() | async\"\n [attr.stroke-linecap]=\"'round'\"\n [attr.data-linkid]=\"id\"\n [attr.stroke-opacity]=\"(selectHovered() | async) ? '0.1' : '0'\"\n [attr.d]=\"selectPath() | async\"\n ></path>\n </g>\n\n <!-- Points -->\n <g *ngFor=\"let point of getPoints(); trackBy: trackByPoints\" [id]=\"point.id\">\n <circle\n fill=\"currentColor\"\n [attr.cx]=\"point.selectX() | async\"\n [attr.cy]=\"point.selectY() | async\"\n r=\"5\"\n class=\"default-point\"\n [ngClass]=\"{ hovered: point.selectHovered() | async }\"\n />\n <circle\n [attr.data-pointid]=\"point.id\"\n [attr.data-linkid]=\"id\"\n (mouseleave)=\"point.setHovered(false); setHovered(false)\"\n (mouseenter)=\"point.setHovered(); setHovered()\"\n [attr.cx]=\"point.selectX() | async\"\n [attr.cy]=\"point.selectY() | async\"\n r=\"15\"\n [attr.opacity]=\"0\"\n [ngClass]=\"{ selected: point.selectSelected() | async }\"\n />\n </g>\n</svg>\n",
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [".link-container{pointer-events:all;position:relative}.default-link,.link-container{fill:none;overflow:visible}@-webkit-keyframes dash{0%{stroke-dashoffset:24}to{stroke-dashoffset:0}}@keyframes dash{0%{stroke-dashoffset:24}to{stroke-dashoffset:0}}.default-link.hovered{-webkit-animation:dash 1s linear infinite;animation:dash 1s linear infinite;stroke:#00c0ff;stroke-dasharray:10,2}.default-point{color:#d3d3d3;overflow:visible;pointer-events:all}.default-point.hovered{color:#00c0ff}"]
},] }
];
DefaultLinkComponent.ctorParameters = () => [
{ type: ChangeDetectorRef }
];
DefaultLinkComponent.propDecorators = {
labelLayer: [{ type: ViewChild, args: ['labelLayer', { read: ViewContainerRef, static: true },] }]
};
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{\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  OnInit,\n  ViewChild,\n  ViewContainerRef\n} from '@angular/core';\nimport { combineLatest, Observable } from 'rxjs';\nimport { filter, takeUntil } from 'rxjs/operators';\nimport { Coords } from '../../../interfaces';\nimport { LabelModel } from '../../../models/label.model';\nimport { PointModel } from '../../../models/point.model';\nimport { PathFinding } from '../../../plugins/smart-routing.plugin';\nimport { createValueState } from '../../../state/state';\nimport { generateCurvePath, generateDynamicPath } from '../../../utils/tool-kit.util';\nimport { DefaultLinkModel } from '../../models/default-link.model';\n\n@Component({\n  selector: 'ngdx-default-link',\n  templateUrl: './default-link.component.html',\n  styleUrls: ['./default-link.component.scss'],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class DefaultLinkComponent extends DefaultLinkModel implements AfterViewInit, OnInit {\n  @ViewChild('labelLayer', { read: ViewContainerRef, static: true })\n  labelLayer: ViewContainerRef;\n\n  path$ = createValueState<string>(null, this.entityPipe('path'));\n  points$ = createValueState<PointModel[]>([], this.entityPipe('points'));\n\n  pathFinding: PathFinding; // only set when smart routing is active\n\n  constructor(private cdRef: ChangeDetectorRef) {\n    super({ type: 'ngdx-default-link' });\n  }\n\n  trackByPoints(i: number, point: PointModel) {\n    return point.id;\n  }\n\n  ngOnInit() {\n    if (this.diagramEngine.getSmartRouting()) {\n      this.pathFinding = this.diagramEngine.getPathfinding();\n    }\n  }\n\n  ngAfterViewInit() {\n    const firstPCoords$ = this.getFirstPoint().selectCoords();\n    const lastPCoords$ = this.getLastPoint().selectCoords();\n\n    // Observe link coords and update drawing accordingly\n    combineLatest([firstPCoords$, lastPCoords$])\n      .pipe(takeUntil(this.onEntityDestroy()))\n      .subscribe(([firstPCoords, lastPCoords]) => {\n        const points = [firstPCoords, lastPCoords];\n\n        if (this.diagramEngine.getSmartRouting()) {\n          // first step: calculate a direct path between the points being linked\n          const directPathCoords = this.pathFinding.calculateDirectPath(firstPCoords, lastPCoords);\n          const routingMatrix = this.diagramEngine.getRoutingMatrix();\n\n          // now we need to extract, from the routing matrix, the very first walkable points\n          // so they can be used as origin and destination of the link to be created\n          const smartLink = this.pathFinding.calculateLinkStartEndCoords(routingMatrix, directPathCoords);\n\n          if (smartLink) {\n            const { start, end, pathToStart, pathToEnd } = smartLink;\n            // second step: calculate a path avoiding hitting other elements\n            const simplifiedPath = this.pathFinding.calculateDynamicPath(\n              routingMatrix,\n              start,\n              end,\n              pathToStart,\n              pathToEnd\n            );\n            const smartPath = generateDynamicPath(simplifiedPath);\n            this.path$.set(smartPath).emit();\n          }\n        } else {\n          // handle regular links\n          // draw the smoothing\n          // if the points are too close, just draw a straight line\n          const isHorizontal = Math.abs(firstPCoords.x - lastPCoords.x) > Math.abs(firstPCoords.y - lastPCoords.y);\n          const xOrY = isHorizontal ? 'x' : 'y';\n          let isStraight = false;\n          if (Math.abs(points[0][xOrY] - points[1][xOrY]) < 50) {\n            isStraight = true;\n          }\n\n          const path = generateCurvePath(firstPCoords, lastPCoords, isStraight ? 0 : this.curvyness);\n          this.path$.set(path).emit();\n        }\n\n        const label = this.getLabel();\n        // update label position\n        if (label) {\n          label.setCoords(this.calcCenterOfPath(firstPCoords, lastPCoords));\n\n          // TODO: check whether we want the label to rotate along with the line\n          // label.setRotation(this.calcLabelIncline(firstPCoords, lastPCoords));\n        }\n\n        // TODO: handle the multiple lines in between the points\n        // https://github.com/projectstorm/react-diagrams/blob/master/src/defaults/widgets/DefaultLinkWidget.tsx#L344-L371\n\n        this.cdRef.detectChanges();\n      });\n\n    // observe link label and draw/remove accordingly\n    this.selectLabel()\n      .pipe(filter(Boolean))\n      .subscribe((label: LabelModel) => {\n        this.diagramEngine.generateWidgetForLabel(label, this.labelLayer);\n        this.cdRef.detectChanges();\n      });\n  }\n\n  calcLabelIncline(firstPoint: Coords, secondPoint: Coords): number {\n    const dy = secondPoint.y - firstPoint.y;\n    const dx = secondPoint.x - firstPoint.x;\n\n    if (dx === 0) {\n      return 0;\n    }\n\n    let inclineAngel = (Math.atan(dy / dx) * 180) / Math.PI;\n\n    if (inclineAngel < 0) {\n      inclineAngel += 180;\n    }\n\n    return inclineAngel;\n  }\n\n  calcCenterOfPath(firstPoint: Coords, secondPoint: Coords): Coords {\n    return { x: (firstPoint.x + secondPoint.x) / 2 + 20, y: (firstPoint.y + secondPoint.y) / 2 + 20 };\n  }\n\n  selectPath(): Observable<string> {\n    return this.path$.value$;\n  }\n}\n"]}