on Drag
Callback for when the photo is experiencing a drag event. This cannot be invoked when the user is scaling.
Parameters
dx
The change of the coordinates in the x-direction
dy
The change of the coordinates in the y-direction
Callback for when the photo is experiencing a drag event. This cannot be invoked when the user is scaling.
The change of the coordinates in the x-direction
The change of the coordinates in the y-direction