GpiQueryMarker
This function returns the current value of the marker symbol attribute, as set by the GpiSetMarker function.
Syntax
GpiQueryMarker(hps)
Parameters
- hps (HPS) - input
- Presentation-space handle.
Return Value
- lSymbol (LONG) - returns
- Marker symbol.
- MARKSYM_DEFAULT (0L)
- Default
- MARKSYM_CROSS (1L)
- Cross symbol
- MARKSYM_PLUS (2L)
- Plus symbol
- MARKSYM_DIAMOND (3L)
- Diamond symbol
- MARKSYM_SQUARE (4L)
- Square symbol
- MARKSYM_SIXPOINTSTAR (5L)
- Six-point star symbol
- MARKSYM_EIGHTPOINTSTAR (6L)
- Eight-point star symbol
- MARKSYM_SOLIDDIAMOND (7L)
- Solid diamond symbol
- MARKSYM_SOLIDSQUARE (8L)
- Solid square symbol
- MARKERSYM_DOT (9L)
- Dot symbol
- MARKSYM_SMALLCIRLCE (10L)
- Small Circle symbol
- MARKSYM_BLANK (64L)
- Blank symbol
- MARKSYM_ERROR (-1L)
- Error
Remarks
This function is invalid when the drawing mode (see GpiSetDrawingMode) is set to retain.
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_IN_RETAIN_MODE (0x208C)
- An attempt was made to issue a function (for example, query) that is invalid when the actual drawing mode is not draw or draw-and-retain.
- PMERR_INV_DC_TYPE (0x2060)
- An invalid type parameter was specified with DevOpenDC, or a function was issued that is invalid for a OD_METAFILE_NOQUERY device context.
Example Code
#define INCL_GPIPRIMITIVES /* Or use INCL_GPI, INCL_PM, */ #include <os2.h> HPS hps; /* Presentation-space handle. */ LONG lSymbol; /* Marker symbol. */ lSymbol = GpiQueryMarker(hps);
This example uses GpiQueryMarker to return the current marker symbol attribute after setting the draw mode to DRAW.
#define INCL_GPIPRIMITIVES /* Primitive functions */ #define INCL_GPICONTROL /* Control functions */ #include <os2.h> HPS hps; /* Presentation-space handle */ LONG lSymbol; /* marker symbol */ if (GpiSetDrawingMode(hps, DM_DRAW) == TRUE) lSymbol = GpiQueryMarker(hps);