nsEventStatus AsyncPanZoomController::OnTouchMove(const MultiTouchEvent& event) {
SingleTouchData& touch = GetTouchFromEvent(event);
nsIntPoint point = touch.mScreenPoint;
PRInt32 xPos = point.x, yPos = point.y;
switch (mState) {
case FLING:
case BOUNCE:
case WAITING_LISTENERS:
// Should never happen.
NS_WARNING("Received impossible touch in OnTouchMove");
// Fall through.
case ANIMATED_ZOOM:
case NOTHING:
// May happen if the user double-taps and drags without lifting after the
// second tap. Ignore the move if this happens.
return nsEventStatus_eIgnore;
case TOUCHING:
if (PanDistance(event) < mPanThreshold) {
return nsEventStatus_eIgnore;
}
mLastRepaint = event.mTime;
mX.StartTouch(xPos);
mY.StartTouch(yPos);
mState = PANNING;
return nsEventStatus_eConsumeNoDefault;
case PANNING_HOLD_LOCKED:
mState = PANNING_LOCKED;
// Fall through.
case PANNING_LOCKED:
TrackTouch(event);
return nsEventStatus_eConsumeNoDefault;
case PANNING_HOLD:
mState = PANNING;
// Fall through.
case PANNING:
TrackTouch(event);
return nsEventStatus_eConsumeNoDefault;
case PINCHING:
// The scale gesture listener should have handled this.
NS_WARNING("Gesture listener should have handled pinching in OnTouchMove.");
return nsEventStatus_eIgnore;
}
return nsEventStatus_eConsumeNoDefault;
}
nsEventStatus AsyncPanZoomController::OnTouchMove(const MultiTouchInput& aEvent) {
switch (mState) {
case FLING:
case NOTHING:
// May happen if the user double-taps and drags without lifting after the
// second tap. Ignore the move if this happens.
return nsEventStatus_eIgnore;
case TOUCHING: {
float panThreshold = 1.0f/2.0f * mDPI;
UpdateWithTouchAtDevicePoint(aEvent);
if (PanDistance() < panThreshold) {
return nsEventStatus_eIgnore;
}
StartPanning(aEvent);
return nsEventStatus_eConsumeNoDefault;
}
case PANNING:
TrackTouch(aEvent);
return nsEventStatus_eConsumeNoDefault;
case PINCHING:
// The scale gesture listener should have handled this.
NS_WARNING("Gesture listener should have handled pinching in OnTouchMove.");
return nsEventStatus_eIgnore;
}
return nsEventStatus_eConsumeNoDefault;
}