dev_clear_windowdev_clear_windowdev_clear_windowDevClearWindowDevClearWindow (Operator)

Name

dev_clear_windowdev_clear_windowdev_clear_windowDevClearWindowDevClearWindow — Clear the contents of the active graphics window.

dev_clear_windowdev_clear_windowdev_clear_windowDevClearWindowDevClearWindow clears the contents of the active graphics window including the history of the displayed iconic objects. The output parameters that have been set for this window via the context menu, the visualization parameters dialog, or the appropriate operators (e.g., with dev_set_colordev_set_colordev_set_colorDevSetColorDevSetColor, dev_set_drawdev_set_drawdev_set_drawDevSetDrawDevSetDraw, etc.) remain unmodified.

The operator is equivalent to pressing the Clear button of the active graphics window.

A graphics window can be activated by calling dev_set_windowdev_set_windowdev_set_windowDevSetWindowDevSetWindow or by pressing the Activate button in the tool bar of the selected graphics window.

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.

Example (HDevelop)

read_image (Image, 'fabrik')
regiongrowing (Image, Regions, 3, 3, 6, 100)
Number := |Regions|
dev_update_window ('off')
for i := 1 to Number by 1
  RegionSelected := Regions[i]
  dev_clear_window ()
  dev_display (RegionSelected)
  * stop ()
endfor

dev_clear_windowdev_clear_windowdev_clear_windowDevClearWindowDevClearWindow (Operator)

Name

Signature

Description

Attention

Example (HDevelop)

Result

Possible Predecessors

Possible Successors

See also

Module