GpiSetGraphicsField

This function sets the size and position of the graphics field in presentation page units.

Syntax

GpiSetGraphicsField (hps, prclField)

Parameters

hps (HPS) - input

Presentation-space handle.

prclField (PRECTL) - input

Graphics field.

It is an error if the top coordinate is less than the bottom, or the right coordinate is less than the left.

All values are in presentation-page units.

Return Code

rc (BOOL) - returns

Success indicator.

• TRUE Successful completion
• FALSE Error occurred.

Errors

Possible returns from WinGetLastError:

PMERR_INV_HPS (0x207F)

An invalid presentation-space handle was specified.

PMERR_PS_BUSY (0x20F4)

An attempt was made to access the presentation space from more than one thread simultaneously.

PMERR_INV_GRAPHICS_FIELD (0x207A)

An invalid field parameter was specified with GpiSetGraphicsField.

PMERR_INV_COORDINATE (0x205B)

An invalid coordinate value was specified.

Remarks

The graphics field specifies a clipping boundary within the presentation page.

The boundaries are inclusive, so that points on them are not clipped (removed). By default, no clipping is performed.

Note: There are restrictions on the use of this function when creating SAA-conforming metafiles; see "MetaFile Resolutions" in the Presentation Manager Programming Reference for more information.

Example Code

This example sets the graphics field to 400x400 with the left bottom corner at (25,25).

#define INCL_GPITRANSFORMS
#include <OS2.H>

HPS hps;    /* Presentation-space */
            /* handle. */

RECTL rclField = {25, /* x coordinate of left-hand edge of */
                      /* rectangle. */
                  25, /* y coordinate of bottom edge of */
                      /* rectangle. */
                  425,/* x coordinate of right-hand edge of */
                      /* rectangle. */
                  425};/* y coordinate of top edge of rectangle. */

GpiSetGraphicsField(hps, &rclField);

Related Functions

• GpiExcludeClipRectangle
• GpiIntersectClipRectangle
• GpiOffsetClipRegion
• GpiQueryClipBox
• GpiQueryClipRegion
• GpiQueryDefViewingLimits
• GpiQueryGraphicsField
• GpiQueryViewingLimits
• GpiSetClipPath
• GpiSetClipRegion
• GpiSetDefViewingLimits
• GpiSetViewingLimits