You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
178 lines
5.6 KiB
178 lines
5.6 KiB
/**********************************************************************/
|
|
/** Microsoft Windows/NT **/
|
|
/** Copyright(c) Microsoft Corp., 1991 **/
|
|
/**********************************************************************/
|
|
|
|
/*
|
|
bltfont.hxx
|
|
This file contains the definition for the BLT FONT class.
|
|
|
|
|
|
FILE HISTORY:
|
|
Johnl 03-Apr-1991 Created
|
|
beng 14-May-1991 Made depend on blt.hxx for clients
|
|
terryk 26-Nov-1991 Added FONT_DEFAULT_FIXED_PITCH
|
|
|
|
*/
|
|
|
|
#ifndef _BLT_HXX_
|
|
#error "Don't include this file directly; instead, include it through blt.hxx"
|
|
#endif // _BLT_HXX_
|
|
|
|
#ifndef _BLTFONT_HXX_
|
|
#define _BLTFONT_HXX_
|
|
|
|
/* Default fonts (will currently resolve to Helv. 8).
|
|
*/
|
|
enum FontType { FONT_DEFAULT,
|
|
FONT_DEFAULT_FIXED_PITCH,
|
|
FONT_DEFAULT_BOLD,
|
|
FONT_DEFAULT_ITALIC,
|
|
FONT_DEFAULT_BOLD_ITALIC
|
|
};
|
|
|
|
/* Font attributes. Note that FONT_ATT_DEFAULT is mututally exclusive
|
|
* from all other attributes.
|
|
*/
|
|
enum FontAttributes { FONT_ATT_DEFAULT = 0x0000, // Use default attributes
|
|
FONT_ATT_ITALIC = 0x0001,
|
|
FONT_ATT_BOLD = 0x0002,
|
|
FONT_ATT_UNDERLINE = 0x0004,
|
|
FONT_ATT_STRIKEOUT = 0x0008
|
|
};
|
|
|
|
/*************************************************************************
|
|
|
|
NAME: FONT
|
|
|
|
SYNOPSIS: The FONT class is a wrapper for the Windows font creation
|
|
and deletion process. It can be very complex so it is
|
|
worth wrapping in a class.
|
|
|
|
INTERFACE:
|
|
FONT( )
|
|
Constructor, where FontType is one of the default fonts
|
|
(FONT_DEFAULT, FONT_DEFAULT_BOLD, FONT_DEFAULT_ITALIC,
|
|
or FONT_DEFAULT_BOLD_ITALIC).
|
|
|
|
FONT()
|
|
Constructor, where LOGFONT is a filled in LOGFONT structure
|
|
|
|
FONT()
|
|
Constructor, where:
|
|
pchFaceName is the name of the font ("Helv", TmsRmn" etc.)
|
|
lfPitchAndFamily is the as in the LOGFONT documentation
|
|
nPointSize is the point size of the font.
|
|
FontAttributes is a combination of the FontAttributes
|
|
enum, "|"ed together.
|
|
|
|
~FONT()
|
|
Destructor, deletes the font
|
|
|
|
HFONT QueryFontHandle()
|
|
Retrieves the handle to the requested font. Will assert out
|
|
under debug if an error has occurred.
|
|
|
|
SetFont()
|
|
Takes a handle to a new font. Must already created be created.
|
|
Can use this method to prevent deleting of the font if you
|
|
the set the HFONT to NULL.
|
|
|
|
SetFont()
|
|
Takes a LOGFONT. Will delete the old font (if there is one)
|
|
and creates a new font based on the LOGFONT structure.
|
|
|
|
QueryError()
|
|
Returns NERR_Success if construction was successful
|
|
|
|
CAVEATS:
|
|
|
|
NOTES: SetXxx methods should be avoided because they require the FONT
|
|
class to regenerate the font. It is generally better to
|
|
simply declare a new FONT object with the desired attributes.
|
|
|
|
HISTORY:
|
|
Johnl 03-Apr-1991 Created
|
|
beng 04-Oct-1991 Correct data types
|
|
|
|
**************************************************************************/
|
|
|
|
DLL_CLASS FONT : public BASE
|
|
{
|
|
private:
|
|
HFONT _hFont;
|
|
|
|
public:
|
|
FONT( enum FontType );
|
|
FONT( const LOGFONT & logfont );
|
|
FONT( const TCHAR * pchFaceName, BYTE lfPitchAndFamily,
|
|
INT nPointSize, enum FontAttributes fontatt );
|
|
|
|
~FONT();
|
|
|
|
HFONT QueryHandle() const
|
|
{ return _hFont; }
|
|
APIERR SetFont( HFONT hNewFont );
|
|
APIERR SetFont( const LOGFONT & logFont );
|
|
};
|
|
|
|
|
|
/*******************************************************************
|
|
|
|
NAME: BLTLogUnits2Points
|
|
|
|
SYNOPSIS: Converts a number of logical units to the corresponding
|
|
Point size
|
|
|
|
ENTRY: nLogUnits - Count of logical units to convert to points
|
|
|
|
EXIT: Returns the number of points
|
|
|
|
NOTES: We are assuming that the default mapping mode (MM_TEXT) is
|
|
used. In this mapping mode, one logical unit is one
|
|
pixel. We grab the desktop's pixels per logical inch.
|
|
|
|
A point is 1/72 of an inch.
|
|
|
|
See Petzold's chapter on fonts for a discussion of fonts.
|
|
|
|
|
|
|
|
HISTORY:
|
|
Johnl 05-Apr-1991 Created
|
|
|
|
********************************************************************/
|
|
|
|
inline INT BLTLogUnits2Points( INT nLogUnits )
|
|
{
|
|
SCREEN_DC dcScreen;
|
|
INT nLogUnitsPerInch = GetDeviceCaps( dcScreen.QueryHdc(), LOGPIXELSY );
|
|
return ( (72 * nLogUnits)/nLogUnitsPerInch );
|
|
}
|
|
|
|
|
|
/*******************************************************************
|
|
|
|
NAME: BLTPoints2LogUnits
|
|
|
|
SYNOPSIS: Converts a point size to a count of logical units.
|
|
|
|
ENTRY: nPoints is the font point size
|
|
|
|
EXIT: Returns the logical units
|
|
|
|
NOTES: See BLTLogUnits2Points for a discussion
|
|
|
|
HISTORY:
|
|
Johnl 05-Apr-1991 Created
|
|
|
|
********************************************************************/
|
|
|
|
inline INT BLTPoints2LogUnits( INT nPoints )
|
|
{
|
|
SCREEN_DC dcScreen;
|
|
INT nLogUnitsPerInch = GetDeviceCaps( dcScreen.QueryHdc(), LOGPIXELSY );
|
|
return ( (nPoints * nLogUnitsPerInch)/72 );
|
|
}
|
|
|
|
#endif // _BLTFONT_HXX_ - end of file
|