public boolean onTouchEvent()

in drawee/src/main/java/com/facebook/drawee/gestures/GestureDetector.java [84:122]


  public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        mIsCapturingGesture = true;
        mIsClickCandidate = true;
        mActionDownTime = event.getEventTime();
        mActionDownX = event.getX();
        mActionDownY = event.getY();
        break;
      case MotionEvent.ACTION_MOVE:
        if (Math.abs(event.getX() - mActionDownX) > mSingleTapSlopPx
            || Math.abs(event.getY() - mActionDownY) > mSingleTapSlopPx) {
          mIsClickCandidate = false;
        }
        break;
      case MotionEvent.ACTION_CANCEL:
        mIsCapturingGesture = false;
        mIsClickCandidate = false;
        break;
      case MotionEvent.ACTION_UP:
        mIsCapturingGesture = false;
        if (Math.abs(event.getX() - mActionDownX) > mSingleTapSlopPx
            || Math.abs(event.getY() - mActionDownY) > mSingleTapSlopPx) {
          mIsClickCandidate = false;
        }
        if (mIsClickCandidate) {
          if (event.getEventTime() - mActionDownTime <= ViewConfiguration.getLongPressTimeout()) {
            if (mClickListener != null) {
              mClickListener.onClick();
            }
          } else {
            // long click, not handled
          }
        }
        mIsClickCandidate = false;
        break;
    }
    return true;
  }