| Operators |
dev_get_window — Return the handle of the active graphics window.
dev_get_window( : : : WindowHandle)
dev_get_window returns the window handle of the active graphics window. If currently no graphics window is open, the return value is -1.
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.
Window handle.
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)
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.
Foundation
| Operators |