TypeScript dnd-core.IDragDropMonitor类代码示例

		public isDragging(globalMonitor: IDragDropMonitor, sourceId: string) {
			if (!spec.isDragging) {
				return sourceId === globalMonitor.getSourceId()
			}

			return spec.isDragging(this.props, this.monitor)
		}

	public isDragging() {
		invariant(
			!isCallingIsDragging,
			'You may not call monitor.isDragging() inside your isDragging() implementation. ' +
				'Read more: http://react-dnd.github.io/react-dnd/docs-drag-source-monitor.html',
		)

		try {
			isCallingIsDragging = true
			return this.internalMonitor.isDraggingSource(this.sourceId as string)
		} finally {
			isCallingIsDragging = false
		}
	}

	public canDrop() {
		invariant(
			!isCallingCanDrop,
			'You may not call monitor.canDrop() inside your canDrop() implementation. ' +
				'Read more: http://react-dnd.github.io/react-dnd/docs-drop-target-monitor.html',
		)

		try {
			isCallingCanDrop = true
			return this.internalMonitor.canDropOnTarget(this.targetId as string)
		} finally {
			isCallingCanDrop = false
		}
	}

	public getInitialSourceClientOffset() {
		return this.internalMonitor.getInitialSourceClientOffset()
	}

	public didDrop() {
		return this.internalMonitor.didDrop()
	}

	public getDropResult() {
		return this.internalMonitor.getDropResult()
	}

	public getItem() {
		return this.internalMonitor.getItem()
	}

	public isOver(options: { shallow?: boolean }) {
		return this.internalMonitor.isOverTarget(this.targetId as string, options)
	}

	public isOverTarget(
		targetId: string,
		options?: { shallow: boolean },
	): boolean {
		return this.internalMonitor.isOverTarget(targetId, options)
	}

	public canDropOnTarget(targetId: string): boolean {
		return this.internalMonitor.canDropOnTarget(targetId)
	}