dev_set_draw — Define the region fill mode.
dev_set_draw( : : DrawMode : )
dev_set_draw defines the fill mode for regions. If DrawMode is set to 'fill', regions are displayed filled, if set to 'margin', only contours are displayed. In the 'margin' mode, the appearance of the contours can be affected by dev_set_line_width, set_line_approx and set_line_style.
For more information see the description of the operator set_draw. However, in contrast to that operator the draw mode is also used for all new graphics windows that are opened afterwards.
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.
Fill mode for region output.
Default value: 'fill'
List of values: 'fill', 'margin'
read_image(Image,'monkey') threshold(Image,Region,128,255) dev_clear_window () dev_set_color('red') dev_set_draw('fill') dev_display(Region) dev_set_color('white') dev_set_draw('margin') dev_display(Region)
If the values of the specified parameters are correct dev_set_draw returns 2 (H_MSG_TRUE). Otherwise an exception is raised and an error code returned.