Ключевое слово $tagTEXTMETRIC

Описание ключевого слова


$tagTEXTMETRIC

Contains basic information about a physical font.

Global Const $tagTEXTMETRIC = "long tmHeight;long tmAscent;long tmDescent;long tmInternalLeading;long tmExternalLeading;" & _
        "long tmAveCharWidth;long tmMaxCharWidth;long tmWeight;long tmOverhang;long tmDigitizedAspectX;long tmDigitizedAspectY;" & _
        "wchar tmFirstChar;wchar tmLastChar;wchar tmDefaultChar;wchar tmBreakChar;byte tmItalic;byte tmUnderlined;byte tmStruckOut;" & _
        "byte tmPitchAndFamily;byte tmCharSet"

Параметры

tmHeight Specifies the height (ascent + descent) of characters.
tmAscent Specifies the ascent (units above the base line) of characters.
tmDescent Specifies the descent (units below the base line) of characters.
tmInternalLeading Specifies the amount of leading (space) inside the bounds set by the tmHeight member.
Accent marks and other diacritical characters may occur in this area. The designer may set this member to zero.
tmExternalLeading Specifies the amount of extra leading (space) that the application adds between rows.
Since this area is outside the font, it contains no marks and is not altered by text output calls in either OPAQUE or TRANSPARENT mode.
The designer may set this member to zero.
tmAveCharWidth Specifies the average width of characters in the font (generally defined as the width of the letter x).
This value does not include the overhang required for bold or italic characters.
tmMaxCharWidth Specifies the width of the widest character in the font.
tmWeight Specifies the weight of the font.
Application defined value associated with the button
tmOverhang Specifies the extra width per string that may be added to some synthesized fonts.
When synthesizing some attributes, such as bold or italic, graphics device interface (GDI) or a device may have to add width to a string on both a per-character and per-string basis.
For example, GDI makes a string bold by expanding the spacing of each character and overstriking by an offset value it italicizes a font by shearing the string. In either case, there is an overhang past the basic string.
For bold strings, the overhang is the distance by which the overstrike is offset. For italic strings, the overhang is the amount the top of the font is sheared past the bottom of the font.
The tmOverhang member enables the application to determine how much of the character width returned by a GetTextExtentPoint32 function call on a single character is the actual character width and how much is the per-string extra width.
The actual width is the extent minus the overhang.
tmDigitizedAspectX Specifies the horizontal aspect of the device for which the font was designed.
tmDigitizedAspectY Specifies the vertical aspect of the device for which the font was designed.
The ratio of the tmDigitizedAspectX and tmDigitizedAspectY members is the aspect ratio of the device for which the font was designed.
tmFirstChar Specifies the value of the first character defined in the font.
tmLastChar Specifies the value of the last character defined in the font.
tmDefaultChar Specifies the value of the character to be substituted for characters not in the font.
tmBreakChar Specifies the value of the character that will be used to define word breaks for text justification.
tmItalic Specifies an italic font if it is nonzero.
tmUnderlined Specifies an underlined font if it is nonzero.
tmStruckOut Specifies a strikeout font if it is nonzero.
tmPitchAndFamily Specifies information about the pitch, the technology, and the family of a physical font.
The four low-order bits of this member specify information about the pitch and the technology of the font. A constant is defined for each of the four bits.
$TMPF_FIXED_PITCH If this bit is set the font is a variable pitch font. If this bit is clear the font is a fixed pitch font. Note very carefully that those meanings are the opposite of what the constant name implies.
$TMPF_VECTOR If this bit is set the font is a vector font.
$TMPF_TRUETYPE If this bit is set the font is a TrueType font.
$TMPF_DEVICE If this bit is set the font is a device font.
tmCharSet Specifies the character set of the font. The character set can be one of the following values.
ANSI_CHARSET
BALTIC_CHARSET
CHINESEBIG5_CHARSET
DEFAULT_CHARSET
EASTEUROPE_CHARSET
GB2312_CHARSET
GREEK_CHARSET
HANGUL_CHARSET
MAC_CHARSET
OEM_CHARSET
RUSSIAN_CHARSET
SHIFTJIS_CHARSET
SYMBOL_CHARSET
TURKISH_CHARSET
VIETNAMESE_CHARSET

Примечания

All sizes are specified in logical units, that is, they depend on the current mapping mode of the display context.