| Operators |
dev_set_part — Modify the displayed image part.
dev_set_part is used to set the part of the image that is displayed in the graphics window. The parameters Row1 and Column1 specify the upper left corner, Row2 and Column2 the lower right corner of the image part to display.
For more information see the description of the operator set_part. In addition, if Row1 is larger than Row2 or Column1 larger than Column2, the zooming in the particular dimension will be reset to show the complete height and/or width of the image. Please note that this is not possible with the operator set_part outside HDevelop.
In addition, note that the part is automatically reset, if a new program is loaded, a program reset is performed, or a new image with a different image size is displayed.
Using the code export feature of HDevelop, the code that is generated for this operator may have a different behavior than the related HALCON operator. For a detailed description of the code export of HDevelop graphics operators into the different programming languages see in the “HDevelop User's Guide” the chapter Code Export -> General Aspects of Code Generation -> Graphics Windows.
Row of the upper left corner of the chosen image part.
Default value: 0
Column of the upper left corner of the chosen image part.
Default value: 0
Row of the lower right corner of the chosen image part.
Default value: 128
Column of the lower right corner of the chosen image part.
Default value: 128
read_image (Image, 'fabrik') for i := 1 to 240 by 10 dev_set_part (i, i, 511-i, 511-i) dev_display (Image) endfor dev_set_part (1, 1, -1, -1) dev_display (Image)
If the values of the specified parameters are correct, dev_set_part returns 2 (H_MSG_TRUE). Otherwise an exception is raised and an error code returned.
Foundation
| Operators |