/
measureFlow.ts
82 lines (71 loc) · 1.92 KB
/
measureFlow.ts
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/**
@module viw-webgl-viewer/gizmos/measure
*/
import { InputScheme } from '../../inputs/input'
import { InputAction } from '../../raycaster'
import { Measure } from './measure'
export type MeasureStage = 'ready' | 'active' | 'done' | 'failed'
/**
* Inputs scheme for measuring as a small state machine.
*/
export class MeasureFlow implements InputScheme {
private readonly _gizmoMeasure: Measure
private _stage: MeasureStage | undefined
private removeMouseListener: (() => void) | undefined
constructor (gizmoMeasure: Measure) {
this._gizmoMeasure = gizmoMeasure
this._stage = 'ready'
}
onProgress: ((stage: MeasureStage) => void) | undefined
onComplete: ((success: boolean) => void) | undefined
get stage () {
return this._stage
}
private unregister () {
this.removeMouseListener?.()
this.removeMouseListener = undefined
}
/**
* Cancels current measuring flow.
*/
abort () {
if (this.stage === 'active' || this.stage === 'ready') {
this._stage = undefined
this.onComplete?.(false)
this.unregister()
}
}
/**
* Implementation for InputScheme onMainAction
*/
onMainAction (action: InputAction) {
switch (this._stage) {
case 'ready':
if (!action.object) return
this._gizmoMeasure.onFirstClick(action)
this._stage = 'active'
this.onProgress?.(this._stage)
break
case 'active':
this._stage = this._gizmoMeasure.onSecondClick(action)
? 'done'
: 'failed'
this.onProgress?.(this._stage)
this.onComplete?.(this._stage === 'done')
this.unregister()
break
}
}
/**
* Implementation for InputScheme onIdleAction
*/
onIdleAction (action: InputAction) {
if (this._stage === 'active') this._gizmoMeasure.onMouseIdle(action)
}
/**
* Implementation for InputScheme onKeyAction
*/
onKeyAction (key: number) {
return false
}
}