Creating a Called Segment

To create a called segment, you must:

• Set the drawing mode to DM_RETAIN.

• Check to see whether the chained attribute is one of the initial segment attributes using GpiQueryInitialSegmentAttrs.

• Set the chained attribute, if necessary, with GpiSetInitialSegmentAttrs.

• Open the segment using GpiOpenSegment.

• Perform the necessary drawing operations.

• Close the segment using GpiCloseSegment.

The following figure shows an example of how to draw a box in a called segment.

#define INCL_GPISEGMENTS#define INCL_GPICONTROL
#include <os2.h>
void fncSEGS02(void){
    POINTL ptl;
    HPS hps;
    LONG idNonChained = 2;

    GpiSetDrawingMode(hps, DM_RETAIN);

    /* Creates a non-chained segment. */

    if (ATTR_ON == GpiQueryInitialSegmentAttrs(hps, ATTR_CHAINED))
        GpiSetInitialSegmentAttrs(hps, ATTR_CHAINED, ATTR_OFF);
    GpiOpenSegment(hps, idNonChained);
    ptl.x = 100;
    ptl.y = 100;
    GpiMove(hps, &ptl);
    ptl.x = 200;
    ptl.y = 200;
    GpiLine(hps, &ptl);
    GpiCloseSegment(hps);
} /* fncSEGS02 */