dev_get_window🔗
Short description🔗
dev_get_window — Return the handle of the active graphics window.
Signature🔗
dev_get_window( out window WindowHandle )
Description🔗
dev_get_window returns the window handle of the active graphics
window.
If currently no graphics window is open, the return value is -1.
Attention🔗
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.
Parameters🔗
WindowHandle (output_control) window → (handle)
Window handle.
Example🔗
(HDevelop)
read_image (Image,'mreut')
threshold (Image, Region, 100, 200)
dev_open_window (1, 1, 200, 200, 'black', WindowID1)
dev_open_window (1, 220, 200, 200, 'black', WindowID2)
dev_get_window (CurrentWindowID)
dev_set_window (WindowID1)
dev_set_color ('blue')
dev_display (Image)
dev_display (Region)
dev_set_window(CurrentWindowID)
Result🔗
If the values of the specified parameters are correct,
dev_get_window returns 2 (H_MSG_TRUE). Otherwise, an
exception is raised and an error code returned.
Combinations with other operators🔗
Module🔗
Foundation