get_mposition_sub_pix — Query the subpixel mouse position.
get_mposition_sub_pix returns the subpixel accurate image
coordinates of the mouse pointer in the output window and the mouse button
These values are returned regardless of the state of the mouse
buttons (pressed or not pressed). If at least one mouse button is pressed,
the state of the modifier keys is returned as well. If no mouse button is
get_mposition returns 0 in
Button, even if
a modifier key is pressed.
The following values are assigned to the individual buttons and keys:
The sum of the values for all pressed buttons/keys is returned in
For graphics windows the coordinates
are expressed with consideration of the current image part
If only pixel accurate image coordinates are required, you can use the
get_mposition_sub_pix fails (returns FAIL) if the mouse pointer
is not located within the window. In this case, no values
Row coordinate of the mouse cursor in the image coordinate system.
Column coordinate of the mouse cursor in the image coordinate system.
Mouse button(s) pressed or 0.
If the mouse pointer is not located within the window, 5 (H_MSG_FAIL) is returned.