Query the displayable grayvalues.
::query_gray returns all grayvalues that are used for grayvalue output (::disp_image) and that can be reproduced exactly in the window. They can be set with the ::set_gray call. The number of displayable grayvalues can be set with ::set_system('num_gray_*',...) before opening the first window.
|
WindowHandle (input_control) |
window -> HTuple.long |
| Window_id. | |
|
Grayval (output_control) |
integer-array -> HTuple.long * |
| Tuple of all displayable grayvalues. | |
::query_gray returns H_MSG_TRUE, if the window is valid. Otherwise an exception handling is raised.
System
