Syntax

[C/C++:]
void gMarkSeg(int nseg, int mark);

[F90:]
subroutine gMarkSeg(nseg, mark)
integer, intent(in) :: nseg,mark

Arguments

nseg
Picture segment or segment group number

> 0,	Change 'marked' status of picture segment specified by nseg

= GALL,

Change 'marked' status of all picture segments

< -1,

Change 'marked' status of all segments except those specified by nseg

mark
'Marked' status

= GUNMARK,

Stop marking (default)

= GMARK,

Mark the segment

Description

The routine gMarkSeg() controls the highlighting of the specified picture segment.

When using hardware segments, highlighting or marking may be achieved by a brightening up or flashing of a picture segment. When using software emulation, marking is achieved by redrawing the selected segment or group with the 'marking colour' index as set by gSetSegMarkColour(). When switching marking off, the segment or group is redrawn in its defined colours.

When the software emulation of picture segments is used and nseg does not exist an error message is generated. When using this routine in the default hardware segmentation mode, gSetSegMode(GHARDWARE), no error message is generated. However, the device may output a local error message.

Some displays do not permit this segment operation on the currently opened segment.

See Also

gMarkSeg Usage
gSetSegMarkColour

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