VScrollImage

 
Name
  VScrollImage - scrolls an image in two dimension. 
 
Synopsis
  VScrollImage(win, image, x1, y1, delta_x, delta_y)
  Window win;
  XImage *image;
  int x1, y1;
  int delta_x, delta_y;
 
Description
  VScrollImage scrolls an image in two dimensions in the image window or
one of its subwindows according to delta_x and delta_y.
 
Return Value
  0 - work successfully.
  6 - invalid window ID.
 
Parameters
  win - the image window or one of its subwindows.
  ximage - specifies the image to be scrolled (already displayed with 
	VPutImage).
  x1, y1 - specifies x and y coordinates of the upper left corner of the
        image, relative to the origin of the specified window before 
	scrolling.
  delta_x, delta_y - the offset between the old image position and the new
        image position.
 
Side Effects
  Any other graphics on top of the image in the window will move with the
image but will be lost if hidden.
 
Entry Conditions
  If VCreateColormap is not called earlier, or the image to be scrolled is
totally out of the specified window boundary, VScrollImage prints an error
message to the standard error stream, produces a core dump file and exits
from the current ptocess.
 
Related Functions