@foblex/flow
Version:
An Angular library designed to simplify the creation and manipulation of dynamic flow. Provides components for flows, nodes, and connections, automating node manipulation and inter-node connections.
71 lines • 12.1 kB
JavaScript
import { PointExtensions } from '@foblex/2d';
import { FDraggableDataContext } from '../f-draggable-data-context';
import { FComponentsStore } from '../../f-storage';
import { calculateDifferenceAfterRotation, } from './calculate-difference-after-rotation';
import { GetNormalizedElementRectRequest } from '../../domain';
import { FMediator } from '@foblex/mediator';
export class FNodeRotateDragHandler {
_fNode;
_fSourceHandlers;
_fTargetHandlers;
_fComponentsStore;
_fMediator;
_fDraggableDataContext;
fEventType = 'node-rotate';
fData;
_initialRotationToX = 0;
_startRotation = 0;
_onDownPoint;
_fNodeRect;
get _transform() {
return this._fComponentsStore.fCanvas.transform;
}
constructor(_injector, _fNode, _fSourceHandlers, _fTargetHandlers) {
this._fNode = _fNode;
this._fSourceHandlers = _fSourceHandlers;
this._fTargetHandlers = _fTargetHandlers;
this._startRotation = this._fNode.rotate;
this.fData = {
fNodeId: _fNode.fId,
};
this._fComponentsStore = _injector.get(FComponentsStore);
this._fMediator = _injector.get(FMediator);
this._fDraggableDataContext = _injector.get(FDraggableDataContext);
}
prepareDragSequence() {
this._fNodeRect = this._getOriginalNodeRect();
this._onDownPoint = this._calculateDownPoint();
this._initialRotationToX = this._calculateAngleBetweenVectors(this._onDownPoint) - this._startRotation;
}
_getOriginalNodeRect() {
return this._fMediator.execute(new GetNormalizedElementRectRequest(this._fNode.hostElement));
}
_calculateDownPoint() {
return PointExtensions.sub(this._fDraggableDataContext.onPointerDownPosition, PointExtensions.sum(this._transform.position, this._transform.scaledPosition));
}
_calculateAngleBetweenVectors(position) {
return Math.atan2(position.y - this._fNodeRect.gravityCenter.y, position.x - this._fNodeRect.gravityCenter.x) * (180 / Math.PI);
}
onPointerMove(difference) {
const position = PointExtensions.sum(this._onDownPoint, difference);
const rotation = this._calculateAngleBetweenVectors(position) - this._initialRotationToX;
this._updateNodeRendering(rotation);
this._fSourceHandlers.forEach((x) => {
x.connection.setSourceDifference(this._calculateDifferenceAfterRotation(x.connector, rotation));
});
this._fTargetHandlers.forEach((x) => {
x.connection.setTargetDifference(this._calculateDifferenceAfterRotation(x.connector, rotation));
});
}
_updateNodeRendering(rotation) {
this._fNode.updateRotate(rotation);
this._fNode.redraw();
}
_calculateDifferenceAfterRotation(position, rotation) {
return calculateDifferenceAfterRotation(position, rotation - this._startRotation, this._fNodeRect.gravityCenter);
}
onPointerUp() {
this._fNode.rotateChange.emit(this._fNode.rotate);
}
}
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{ IPoint, IRect, ITransformModel, PointExtensions } from '@foblex/2d';\nimport { IFDragHandler } from '../f-drag-handler';\nimport { FNodeBase } from '../../f-node';\nimport { FDraggableDataContext } from '../f-draggable-data-context';\nimport { FComponentsStore } from '../../f-storage';\nimport { BaseConnectionDragHandler } from '../f-node-move';\nimport {\n  calculateDifferenceAfterRotation,\n} from './calculate-difference-after-rotation';\nimport { GetNormalizedElementRectRequest } from '../../domain';\nimport { FMediator } from '@foblex/mediator';\nimport { Injector } from '@angular/core';\n\nexport class FNodeRotateDragHandler implements IFDragHandler {\n\n  private readonly _fComponentsStore: FComponentsStore;\n  private readonly _fMediator: FMediator;\n  private readonly _fDraggableDataContext: FDraggableDataContext;\n\n  public fEventType = 'node-rotate';\n  public fData: any;\n\n  private _initialRotationToX: number = 0;\n  private readonly _startRotation: number = 0;\n\n  private _onDownPoint!: IPoint;\n  private _fNodeRect!: IRect;\n\n  private get _transform(): ITransformModel {\n    return this._fComponentsStore.fCanvas!.transform;\n  }\n\n  constructor(\n    _injector: Injector,\n    private _fNode: FNodeBase,\n    private _fSourceHandlers: {\n      connection: BaseConnectionDragHandler,\n      connector: IPoint,\n    }[],\n    private _fTargetHandlers: {\n      connection: BaseConnectionDragHandler,\n      connector: IPoint,\n    }[],\n  ) {\n    this._startRotation = this._fNode.rotate;\n    this.fData = {\n      fNodeId: _fNode.fId,\n    };\n\n    this._fComponentsStore = _injector.get(FComponentsStore);\n    this._fMediator = _injector.get(FMediator);\n    this._fDraggableDataContext = _injector.get(FDraggableDataContext);\n  }\n\n  public prepareDragSequence(): void {\n    this._fNodeRect = this._getOriginalNodeRect();\n    this._onDownPoint = this._calculateDownPoint();\n    this._initialRotationToX = this._calculateAngleBetweenVectors(this._onDownPoint) - this._startRotation;\n  }\n\n  private _getOriginalNodeRect(): IRect {\n    return this._fMediator.execute<IRect>(new GetNormalizedElementRectRequest(this._fNode!.hostElement));\n  }\n\n  private _calculateDownPoint(): IPoint {\n    return PointExtensions.sub(\n      this._fDraggableDataContext.onPointerDownPosition,\n      PointExtensions.sum(this._transform.position, this._transform.scaledPosition)\n    );\n  }\n\n  private _calculateAngleBetweenVectors(position: IPoint): number {\n    return Math.atan2(\n      position.y - this._fNodeRect.gravityCenter.y,\n      position.x - this._fNodeRect.gravityCenter.x\n    ) * (180 / Math.PI);\n  }\n\n  public onPointerMove(difference: IPoint): void {\n    const position = PointExtensions.sum(this._onDownPoint, difference);\n    const rotation = this._calculateAngleBetweenVectors(position) - this._initialRotationToX;\n    this._updateNodeRendering(rotation);\n\n    this._fSourceHandlers.forEach((x) => {\n      x.connection.setSourceDifference(\n        this._calculateDifferenceAfterRotation(x.connector, rotation)\n      )\n    });\n    this._fTargetHandlers.forEach((x) => {\n      x.connection.setTargetDifference(\n        this._calculateDifferenceAfterRotation(x.connector, rotation)\n      );\n    });\n  }\n\n  private _updateNodeRendering(rotation: number): void {\n    this._fNode.updateRotate(rotation);\n    this._fNode.redraw();\n  }\n\n  private _calculateDifferenceAfterRotation(position: IPoint, rotation: number): IPoint {\n    return calculateDifferenceAfterRotation(\n      position,\n      rotation - this._startRotation,\n      this._fNodeRect.gravityCenter\n    )\n  }\n\n  public onPointerUp(): void {\n    this._fNode.rotateChange.emit(this._fNode.rotate);\n  }\n}\n"]}