X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9475f9e7e14d1353d4a2b16615f3d0d4457a0526..0bd2681966523df88ad5cf8e505b532843e58d74:/docs/latex/wx/font.tex diff --git a/docs/latex/wx/font.tex b/docs/latex/wx/font.tex index e76f024b30..f456343766 100644 --- a/docs/latex/wx/font.tex +++ b/docs/latex/wx/font.tex @@ -4,6 +4,13 @@ A font is an object which determines the appearance of text. Fonts are used for drawing text to a device context, and setting the appearance of a window's text. +This class uses \helpref{reference counting and copy-on-write}{trefcount} +internally so that assignments between two instances of this class are very +cheap. You can therefore use actual objects instead of pointers without +efficiency problems. If an instance of this class is changed it will create +its own data internally so that other instances, which previously shared the +data using the reference counting, are not affected. + You can retrieve the current system font settings with \helpref{wxSystemSettings}{wxsystemsettings}. \helpref{wxSystemSettings}{wxsystemsettings} @@ -17,6 +24,10 @@ You can retrieve the current system font settings with \helpref{wxSystemSettings +\wxheading{Library} + +\helpref{wxCore}{librarieslist} + \wxheading{Constants} The possible values for the \arg{family} parameter of \helpref{wxFont @@ -165,6 +176,10 @@ wxSWISS\_FONT} Default constructor. +\func{}{wxFont}{\param{const wxFont\&}{ font}} + +Copy constructor, uses \helpref{reference counting}{trefcount}. + \func{}{wxFont}{\param{int}{ pointSize}, \param{wxFontFamily}{ family}, \param{int}{ style}, \param{wxFontWeight}{ weight}, \param{const bool}{ underline = false}, \param{const wxString\& }{faceName = ""}, \param{wxFontEncoding }{encoding = wxFONTENCODING\_DEFAULT}} @@ -244,12 +259,10 @@ and \helpref{wxDC::GetTextExtent}{wxdcgettextextent}. \func{}{\destruct{wxFont}}{\void} Destructor. +See \helpref{reference-counted object destruction}{refcountdestruct} for more info. \wxheading{Remarks} -The destructor may not delete the underlying font object of the native windowing -system, since wxFont uses a reference counting system for efficiency. - Although all remaining fonts are deleted when the application exits, the application should try to clean up all fonts itself. This is because wxWidgets cannot know if a pointer to the font object is stored in an @@ -304,12 +317,26 @@ family identifiers. \constfunc{wxString}{GetNativeFontInfoDesc}{\void} -Returns the platform-dependent string completely describing this font or an -empty string if the font wasn't constructed using the native font description. +Returns the platform-dependent string completely describing this font. +Returned string is always non-empty. +Note that the returned string is not meant to be shown or edited by the user: a typical +use of this function is for serializing in string-form a wxFont object. \wxheading{See also} -\helpref{wxFont::SetNativeFontInfo}{wxfontsetnativefontinfo} +\helpref{wxFont::SetNativeFontInfo}{wxfontsetnativefontinfo},\helpref{wxFont::GetNativeFontInfoUserDesc}{wxfontgetnativefontinfouserdesc} + + +\membersection{wxFont::GetNativeFontInfoUserDesc}\label{wxfontgetnativefontinfouserdesc} + +\func{wxString}{GetNativeFontInfoUserDesc}{\void} + +Returns a user-friendly string for this font object. Returned string is always non-empty. +Some examples of the formats of returned strings (which are platform-dependent) are in \helpref{SetNativeFontInfoUserDesc}{wxfontsetnativefontinfouserdesc}. + +\wxheading{See also} + +\helpref{wxFont::GetNativeFontInfoDesc}{wxfontgetnativefontinfodesc} \membersection{wxFont::GetPointSize}\label{wxfontgetpointsize} @@ -383,9 +410,9 @@ Using \texttt{New()} is currently the only way to directly create a font with the given size in pixels on platforms other than wxMSW. -\membersection{wxFont::Ok}\label{wxfontok} +\membersection{wxFont::IsOk}\label{wxfontisok} -\constfunc{bool}{Ok}{\void} +\constfunc{bool}{IsOk}{\void} Returns {\tt true} if this object is a valid font, {\tt false} otherwise. @@ -404,9 +431,10 @@ Sets the default font encoding. \membersection{wxFont::SetFaceName}\label{wxfontsetfacename} -\func{void}{SetFaceName}{\param{const wxString\& }{faceName}} +\func{bool}{SetFaceName}{\param{const wxString\& }{faceName}} Sets the facename for the font. +Returns \true if the given face name exists; \false otherwise. \wxheading{Parameters} @@ -452,12 +480,44 @@ Sets the font family. \membersection{wxFont::SetNativeFontInfo}\label{wxfontsetnativefontinfo} -\func{void}{SetNativeFontInfo}{\param{const wxString\& }{info}} +\func{bool}{SetNativeFontInfo}{\param{const wxString\& }{info}} -Creates the font corresponding to the given native font description string +Creates the font corresponding to the given native font description string and returns \true if +the creation was successful. which must have been previously returned by \helpref{GetNativeFontInfoDesc}{wxfontgetnativefontinfodesc}. If the string is -invalid, font is unchanged. +invalid, font is unchanged. This function is typically used for de-serializing a wxFont +object previously saved in a string-form. + +\wxheading{See also} + +\helpref{wxFont::SetNativeFontInfoUserDesc}{wxfontsetnativefontinfouserdesc} + + +\membersection{wxFont::SetNativeFontInfoUserDesc}\label{wxfontsetnativefontinfouserdesc} + +\func{bool}{SetNativeFontInfoUserDesc}{\param{const wxString\& }{info}} + +Creates the font corresponding to the given native font description string and returns \true if +the creation was successful. +Unlike \helpref{SetNativeFontInfo}{wxfontsetnativefontinfo}, this function accepts +strings which are user-friendly. +Examples of accepted string formats are: + +\twocolwidtha{15cm} +\begin{twocollist}\itemsep=0pt +\twocolitem{Generic syntax}{Example} +\twocolitem{on {\bf wxGTK2}: {\tt $[FACE-NAME]$ $[bold]$ $[oblique|italic]$ $[POINTSIZE]$}}{Monospace bold 10} +\twocolitem{on {\bf wxMSW}: {\tt $[light|bold]$ $[italic]$ $[FACE-NAME]$ $[POINTSIZE]$ $[ENCODING]$}}{Tahoma 10 WINDOWS-1252} +\twocolitem{on {\bf wxMac}: FIXME}{FIXME} +\end{twocollist} + +For more detailed information about the allowed syntaxes you can look at the documentation of the native API used for font-rendering (e.g. \urlref{pango\_font\_description\_from\_string}{http://developer.gnome.org/doc/API/2.0/pango/pango-Fonts.html\#pango-font-description-from-string}). + +\wxheading{See also} + +\helpref{wxFont::SetNativeFontInfo}{wxfontsetnativefontinfo} + \membersection{wxFont::SetPointSize}\label{wxfontsetpointsize} @@ -531,24 +591,21 @@ Sets the font weight. \func{wxFont\&}{operator $=$}{\param{const wxFont\& }{font}} -Assignment operator, using reference counting. Returns a reference -to `this'. +Assignment operator, using \helpref{reference counting}{trefcount}. \membersection{wxFont::operator $==$}\label{wxfontequals} \func{bool}{operator $==$}{\param{const wxFont\& }{font}} -Equality operator. Two fonts are equal if they contain pointers -to the same underlying font data. It does not compare each attribute, -so two independently-created fonts using the same parameters will -fail the test. +Equality operator. +See \helpref{reference-counted object comparison}{refcountequality} for more info. \membersection{wxFont::operator $!=$}\label{wxfontnotequals} \func{bool}{operator $!=$}{\param{const wxFont\& }{font}} -Inequality operator. Two fonts are not equal if they contain pointers -to different underlying font data. It does not compare each attribute. +Inequality operator. +See \helpref{reference-counted object comparison}{refcountequality} for more info.