Class TargetMonitor

packages/react-dnd/src/createTargetMonitor.js:5–68

let isCallingCanDrop = false;

class TargetMonitor {
  constructor(manager) {
    this.internalMonitor = manager.getMonitor();
  }

  receiveHandlerId(targetId) {
    this.targetId = targetId;
  }

  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);
    } finally {
      isCallingCanDrop = false;
    }
  }

  isOver(options) {
    return this.internalMonitor.isOverTarget(this.targetId, options);
  }

  getItemType() {
    return this.internalMonitor.getItemType();
  }

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

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

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

  getInitialClientOffset() {
    return this.internalMonitor.getInitialClientOffset();
  }

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

  getSourceClientOffset() {
    return this.internalMonitor.getSourceClientOffset();
  }

  getClientOffset() {
    return this.internalMonitor.getClientOffset();