mi32/scrnunit.h File Reference

<mi32/scrnunit.h> More...

#include <mi32/stddefns.h>

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Enumerations
enum	SCREENUNIT {   SCREENUNIT_Inches = 0, SCREENUNIT_Millimeters = 1, SCREENUNIT_mm = SCREENUNIT_Millimeters, SCREENUNIT_Points = 2,   SCREENUNIT_Pixels = 3, SCREENUNIT_1OverInches = 4, SCREENUNIT_MetersAtCurrentScale = 5, SCREENUNIT_Arbitrary = 6,   SCREENUNIT_Object = 7, SCREENUNIT_COUNT = 8 }
Functions
double	ConvertScreenUnits (double val, int iunit, int ounit, double MapScale=1.0)
double	ConvertScreenUnits (double val, double mmPerPixel, double MapScale, int iunit, int ounit)
double	GetScreenPixelSizeMM ()
double	MwinGetPixelSizeMM (void *hdc)

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Detailed Description

<mi32/scrnunit.h>

Definitions for SCREENUNIT constants and functions

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Enumeration Type Documentation

enum SCREENUNIT

Screen unit enumeration values.

These values are stored in files and thus must not change.

Enumerator:

SCREENUNIT_Inches
SCREENUNIT_Millimeters
SCREENUNIT_mm
SCREENUNIT_Points
SCREENUNIT_Pixels
SCREENUNIT_1OverInches
SCREENUNIT_MetersAtCurrentScale
SCREENUNIT_Arbitrary
SCREENUNIT_Object
SCREENUNIT_COUNT

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Function Documentation

double ConvertScreenUnits	(	double	val,
		int	iunit,
		int	ounit,
		double	MapScale = 1.0
	)

Convert SCREENUNIT value using pixel size determined from screen.

Returns:

Converted value

Parameters:

	val	Input value
	iunit	Input units (SCREENUNIT_...)
	ounit	Output units (SCREENUNIT_...)
	MapScale	Map scale

double ConvertScreenUnits	(	double	val,
		double	mmPerPixel,
		double	MapScale,
		int	iunit,
		int	ounit
	)

Convert SCREENUNIT value using given "pixel size".

Returns:

Converted value

Parameters:

	val	Input value
	mmPerPixel	Millimeters per pixel
	MapScale	Map scale
	iunit	Input units (SCREENUNIT_...)
	ounit	Output units (SCREENUNIT_...)

double GetScreenPixelSizeMM

(

)

Get screen pixel size in millimeters.

double MwinGetPixelSizeMM

(

void *

hdc

)

Get screen pixel size in millimeters using device context (WIN32_NATIVE only).

Parameters:

hdc

Windows device context, 0 for default