query_insert ( : : : Mode )

Query of possible graphic modes.

query_insert returns the possible modes pixels can be displayed in the output window. New pixels may e.g. overwrite old ones. In most of the cases there is a functional relationship between old and new values.

Possible display functions: 'copy' overwrite displayed pixels 'xor' display old "xor" new pixels 'not' complement displayed pixels

"copy" is always available.


Parameters

Mode (output_control)
string-array -> string
display function name.


Result

query_insert returns TRUE, if a window is active. Otherwise an exception is raised.


Possible Successors

set_insert, disp_region


See also

set_insert, get_insert



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