36c9828f70
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51911 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/////////////////////////////////////////////////////////////////////////////
|
|
// Name: font
|
|
// Purpose: topic overview
|
|
// Author: wxWidgets team
|
|
// RCS-ID: $Id$
|
|
// Licence: wxWindows license
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*!
|
|
|
|
@page font_overview wxFont overview
|
|
|
|
Class: #wxFont, #wxFontDialog
|
|
A font is an object which determines the appearance of text, primarily
|
|
when drawing text to a window or device context. A font is determined by
|
|
the following parameters (not all of them have to be specified, of course):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Point size
|
|
|
|
|
|
|
|
|
|
This is the standard way of referring to text size.
|
|
|
|
|
|
|
|
|
|
|
|
Family
|
|
|
|
|
|
|
|
|
|
Supported families are:
|
|
@b wxDEFAULT, wxDECORATIVE, wxROMAN, wxSCRIPT, wxSWISS, wxMODERN.
|
|
@b wxMODERN is a fixed pitch font; the others are either fixed or variable pitch.
|
|
|
|
|
|
|
|
|
|
|
|
Style
|
|
|
|
|
|
|
|
|
|
The value can be @b wxNORMAL, wxSLANT or @b wxITALIC.
|
|
|
|
|
|
|
|
|
|
|
|
Weight
|
|
|
|
|
|
|
|
|
|
The value can be @b wxNORMAL, wxLIGHT or @b wxBOLD.
|
|
|
|
|
|
|
|
|
|
|
|
Underlining
|
|
|
|
|
|
|
|
|
|
The value can be @true or @false.
|
|
|
|
|
|
|
|
|
|
|
|
Face name
|
|
|
|
|
|
|
|
|
|
An optional string specifying the actual typeface to be used. If @NULL,
|
|
a default typeface will chosen based on the family.
|
|
|
|
|
|
|
|
|
|
|
|
Encoding
|
|
|
|
|
|
|
|
|
|
The font encoding (see @b wxFONTENCODING_XXX
|
|
constants and the @ref fontencoding_overview for more
|
|
details)
|
|
|
|
|
|
|
|
|
|
|
|
Specifying a family, rather than a specific typeface name, ensures a degree of
|
|
portability across platforms because a suitable font will be chosen for the
|
|
given font family, however it doesn't allow to choose a font precisely as the
|
|
parameters above don't suffice, in general, to identify all the available fonts
|
|
and this is where using the native font descriptions may be helpful - see
|
|
below.
|
|
Under Windows, the face name can be one of the installed fonts on the user's
|
|
system. Since the choice of fonts differs from system to system, either choose
|
|
standard Windows fonts, or if allowing the user to specify a face name, store
|
|
the family name with any file that might be transported to a different Windows
|
|
machine or other platform.
|
|
|
|
@b Note: There is currently a difference between the appearance
|
|
of fonts on the two platforms, if the mapping mode is anything other than
|
|
wxMM_TEXT. Under X, font size is always specified in points. Under MS
|
|
Windows, the unit for text is points but the text is scaled according to the
|
|
current mapping mode. However, user scaling on a device context will also
|
|
scale fonts under both environments.
|
|
|
|
@ref nativefontinformation_overview
|
|
|
|
|
|
@section nativefontinformation Native font information
|
|
|
|
An alternative way of choosing fonts is to use the native font description.
|
|
This is the only acceptable solution if the user is allowed to choose the font
|
|
using the #wxFontDialog because the selected font cannot
|
|
be described using only the family name and so, if only family name is stored
|
|
permanently, the user would almost surely see a different font in the program
|
|
later.
|
|
Instead, you should store the value returned by
|
|
wxFont::GetNativeFontInfoDesc and pass
|
|
it to wxFont::SetNativeFontInfo later to
|
|
recreate exactly the same font.
|
|
Note that the contents of this string depends on the platform and shouldn't be
|
|
used for any other purpose (in particular, it is not meant to be shown to the
|
|
user). Also please note that although the native font information is currently
|
|
implemented for Windows and Unix (GTK+ and Motif) ports only, all the methods
|
|
are available for all the ports and should be used to make your program work
|
|
correctly when they are implemented later.
|
|
|
|
*/
|
|
|
|
|