Modify the displayed image part.
::set_part modifies the image part that is displayed in the window. (Row1,Column1) denotes the upper left corner and (Row2,Column2) the lower right corner of the image part to display. The changed values are used by grayvalue output operators (::disp_image, ::disp_color) as well as region output operators (::disp_region)).
If only part of an image is displayed, it will be zoomed to full window size. The zooming interpolation method can be set with ::set_part_style. ::get_part returns the values of the image part to display.
After a call of ::set_part, some operators like ::draw_region, ::draw_ellipse, etc. can no longer be used.
|
WindowHandle (input_control) |
window -> HTuple.long |
| Window_id. | |
|
Row1 (input_control) |
rectangle.origin.y -> HTuple.long |
| Row of the upper left corner of the chosen image part. | |
| Default value: 0 | |
|
Column1 (input_control) |
rectangle.origin.x -> HTuple.long |
| Column of the upper left corner of the chosen image part. | |
| Default value: 0 | |
|
Row2 (input_control) |
rectangle.corner.y -> HTuple.long |
| Row of the lower right corner of the chosen image part. | |
| Default value: 512 | |
| Restriction: Row2 >= Row1 | |
|
Column2 (input_control) |
rectangle.corner.x -> HTuple.long |
| Column of the lower right corner of the chosen image part. | |
| Default value: 512 | |
| Restriction: Column2 >= Column1 | |
get_system("width",Width) ;
get_system("height",Height) ;
set_part(WindowHandle,0,0,Height-1,Width-1) ;
disp_image(Image,WindowHandle) ;
draw_rectangle1(WindowHandle,&Row1,&Column1,&Row2,&Column2) ;
set_part(WindowHandle,Row1,Column1,Row2,Column2) ;
disp_image(Image,WindowHandle) ;
::set_part returns H_MSG_TRUE if the window is valid. Otherwise an exception handling is raised.
::set_part_style, ::disp_image, ::disp_region
::get_part, ::set_part_style, ::disp_region, ::disp_image, ::disp_color
System
