X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8f1337ed68fb7b8ce177e83718afa9c13cb21eb6..2028c33ab5a39a12bd410ac953731a56ad6377ba:/interface/wx/font.h

diff --git a/interface/wx/font.h b/interface/wx/font.h
index 6b600a95f7..a4283059b0 100644
--- a/interface/wx/font.h
+++ b/interface/wx/font.h
@@ -8,22 +8,39 @@
 
 
 /**
-    Standard font families: these may be used only for the font creation, it
-    doesn't make sense to query an existing font for its font family as,
-    especially if the font had been created from a native font description, it
-    may be unknown.
+    Standard font families: these are used mainly during wxFont creation to specify
+    the generic properties of the font without hardcoding in the sources a specific
+    face name.
+
+    wxFontFamily thus allows to group the font face names of fonts with similar
+    properties. Most wxWidgets ports use lists of fonts for each font family
+    inspired by the data taken from http://www.codestyle.org/css/font-family.
 */
 enum wxFontFamily
 {
     wxFONTFAMILY_DEFAULT = wxDEFAULT,           //!< Chooses a default font.
+
     wxFONTFAMILY_DECORATIVE = wxDECORATIVE,     //!< A decorative font.
     wxFONTFAMILY_ROMAN = wxROMAN,               //!< A formal, serif font.
     wxFONTFAMILY_SCRIPT = wxSCRIPT,             //!< A handwriting font.
     wxFONTFAMILY_SWISS = wxSWISS,               //!< A sans-serif font.
-    wxFONTFAMILY_MODERN = wxMODERN,             //!< A fixed pitch font.
-    wxFONTFAMILY_TELETYPE = wxTELETYPE,         //!< A teletype font.
-    wxFONTFAMILY_MAX,
-    wxFONTFAMILY_UNKNOWN = wxFONTFAMILY_MAX
+
+    /// A fixed pitch font. Note that wxFont currently does not make distinctions
+    /// between @c wxFONTFAMILY_MODERN and @c wxFONTFAMILY_TELETYPE.
+    wxFONTFAMILY_MODERN = wxMODERN,
+
+    /// A teletype (i.e. monospaced) font.
+    /// Monospace fonts have a fixed width like typewriters and often have strong angular
+    /// or block serifs. Monospace font faces are often used code samples and have a simple,
+    /// functional font style.
+    /// See also wxFont::IsFixedWidth() for an easy way to test for monospace property.
+    wxFONTFAMILY_TELETYPE = wxTELETYPE,
+
+    /// Returned by wxFont::GetFamily() when the face name of the font cannot
+    /// be classified into one of the previous wxFontFamily values.
+    wxFONTFAMILY_UNKNOWN = wxFONTFAMILY_MAX,
+
+    wxFONTFAMILY_MAX
 };
 
 /**
@@ -31,9 +48,16 @@ enum wxFontFamily
 */
 enum wxFontStyle
 {
+    /// The font is drawn without slant.
     wxFONTSTYLE_NORMAL = wxNORMAL,
+
+    /// The font is slanted in an italic style.
     wxFONTSTYLE_ITALIC = wxITALIC,
+
+    /// The font is slanted, but in a roman style.
+    /// Note that under wxMSW this style is the same as @c wxFONTSTYLE_ITALIC.
     wxFONTSTYLE_SLANT = wxSLANT,
+
     wxFONTSTYLE_MAX
 };
 
@@ -87,6 +111,8 @@ enum wxFontFlag
 
 /**
     Font encodings.
+
+    See wxFont::SetEncoding().
 */
 enum wxFontEncoding
 {
@@ -266,19 +292,20 @@ public:
         @param pointSize
             Size in points. See SetPointSize() for more info.
         @param family
-            Font family, a generic way of referring to fonts without specifying actual
-            facename. One of the ::wxFontFamily enumeration values.
+            The font family: a generic portable way of referring to fonts without specifying a
+            facename. This parameter must be one of the ::wxFontFamily enumeration values.
+            If the @a faceName argument is provided, then it overrides the font family.
         @param style
             One of @c wxFONTSTYLE_NORMAL, @c wxFONTSTYLE_SLANT and @c wxFONTSTYLE_ITALIC.
         @param weight
-            Font weight, sometimes also referred to as font boldness. 
+            Font weight, sometimes also referred to as font boldness.
             One of the ::wxFontWeight enumeration values.
         @param underline
             The value can be @true or @false.
             At present this has an effect on Windows and Motif 2.x only.
         @param faceName
-            An optional string specifying the actual typeface to be used.
-            If it is an empty string, a default typeface will be chosen based on the family.
+            An optional string specifying the face name to be used.
+            If it is an empty string, a default face name will be chosen based on the family.
         @param encoding
             An encoding which may be one of the enumeration values of ::wxFontEncoding.
             Briefly these can be summed up as:
@@ -286,8 +313,8 @@ public:
                 <TR><TD>@c wxFONTENCODING_SYSTEM</TD><TD>Default system encoding.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_DEFAULT</TD><TD>
                     Default application encoding: this is the encoding set by calls to
-                    SetDefaultEncoding() and which may be set to, say, KOI8 to create all 
-                    fonts by default with KOI8 encoding. Initially, the default application 
+                    SetDefaultEncoding() and which may be set to, say, KOI8 to create all
+                    fonts by default with KOI8 encoding. Initially, the default application
                     encoding is the same as default system encoding.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_ISO8859_1...15</TD><TD>ISO8859 encodings.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_KOI8</TD><TD>The standard Russian encoding for Internet.</TD></TR>
@@ -311,8 +338,9 @@ public:
         @param pixelSize
             Size in pixels. See SetPixelSize() for more info.
         @param family
-            Font family, a generic way of referring to fonts without specifying actual
-            facename. One of ::wxFontFamily enumeration values.
+            The font family: a generic portable way of referring to fonts without specifying a
+            facename. This parameter must be one of the ::wxFontFamily enumeration values.
+            If the @a faceName argument is provided, then it overrides the font family.
         @param style
             One of @c wxFONTSTYLE_NORMAL, @c wxFONTSTYLE_SLANT and @c wxFONTSTYLE_ITALIC.
         @param weight
@@ -322,8 +350,8 @@ public:
             The value can be @true or @false.
             At present this has an effect on Windows and Motif 2.x only.
         @param faceName
-            An optional string specifying the actual typeface to be used.
-            If it is an empty string, a default typeface will be chosen based on the family.
+            An optional string specifying the face name to be used.
+            If it is an empty string, a default face name will be chosen based on the family.
         @param encoding
             An encoding which may be one of the enumeration values of ::wxFontEncoding.
             Briefly these can be summed up as:
@@ -331,8 +359,8 @@ public:
                 <TR><TD>@c wxFONTENCODING_SYSTEM</TD><TD>Default system encoding.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_DEFAULT</TD><TD>
                     Default application encoding: this is the encoding set by calls to
-                    SetDefaultEncoding() and which may be set to, say, KOI8 to create all 
-                    fonts by default with KOI8 encoding. Initially, the default application 
+                    SetDefaultEncoding() and which may be set to, say, KOI8 to create all
+                    fonts by default with KOI8 encoding. Initially, the default application
                     encoding is the same as default system encoding.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_ISO8859_1...15</TD><TD>ISO8859 encodings.</TD></TR>
                 <TR><TD>@c wxFONTENCODING_KOI8</TD><TD>The standard Russian encoding for Internet.</TD></TR>
@@ -350,6 +378,15 @@ public:
            const wxString& faceName = wxEmptyString,
            wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
 
+    /**
+        Constructor from font description string.
+
+        This constructor uses SetNativeFontInfo() to initialize the font.
+        If @a fontdesc is invalid the font remains uninitialized, i.e. its IsOk() method
+        will return @false.
+     */
+    wxFont(const wxString& fontdesc);
+
     /**
         Destructor.
 
@@ -364,24 +401,40 @@ public:
     */
     virtual ~wxFont();
 
+
     /**
-        Returns the current application's default encoding.
+        @name Getters
+    */
+    //@{
 
-        @see @ref overview_fontencoding, SetDefaultEncoding()
+    /**
+        Returns the encoding of this font.
+
+        Note that under wxGTK the returned value is always @c wxFONTENCODING_UTF8.
+
+        @see SetEncoding()
     */
-    static wxFontEncoding GetDefaultEncoding();
+    virtual wxFontEncoding GetEncoding() const;
 
     /**
-        Returns the typeface name associated with the font, or the empty string if
-        there is no typeface information.
+        Returns the face name associated with the font, or the empty string if
+        there is no face information.
 
         @see SetFaceName()
     */
     virtual wxString GetFaceName() const;
 
     /**
-        Gets the font family. See SetFamily() for a list of valid
-        family identifiers.
+        Gets the font family.
+        As described in ::wxFontFamily docs the returned value acts as a rough,
+        basic classification of the main font properties (look, spacing).
+
+        If the current font face name is not recognized by wxFont or by the
+        underlying system, @c wxFONTFAMILY_UNKNOWN is returned.
+
+        Note that currently this function is rather unreliable (@c wxFONTFAMILY_UNKNOWN
+        is returned in too many cases) and not particularly useful.
+        Font families mostly make sense only for font creation; see SetFamily().
 
         @see SetFamily()
     */
@@ -389,23 +442,30 @@ public:
 
     /**
         Returns the platform-dependent string completely describing this font.
-        Returned string is always non-empty.
+
+        Returned string is always non-empty unless the font is invalid (in
+        which case an assert is triggered).
 
         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.
 
-        @see SetNativeFontInfo(),GetNativeFontInfoUserDesc()
+        @see SetNativeFontInfo(), GetNativeFontInfoUserDesc()
     */
     wxString GetNativeFontInfoDesc() const;
 
     /**
         Returns a user-friendly string for this font object.
-        Returned string is always non-empty.
+
+        Returned string is always non-empty unless the font is invalid (in
+        which case an assert is triggered).
+
+        The string does not encode all wxFont infos under all platforms;
+        e.g. under wxMSW the font family is not present in the returned string.
 
         Some examples of the formats of returned strings (which are platform-dependent)
         are in SetNativeFontInfoUserDesc().
 
-        @see GetNativeFontInfoDesc()
+        @see SetNativeFontInfoUserDesc(), GetNativeFontInfoDesc()
     */
     wxString GetNativeFontInfoUserDesc() const;
 
@@ -418,7 +478,7 @@ public:
 
     /**
         Gets the pixel size.
-        
+
         Note that under wxMSW if you passed to SetPixelSize() (or to the ctor)
         a wxSize object with a null width value, you'll get a null width in
         the returned object.
@@ -426,7 +486,7 @@ public:
         @see SetPixelSize()
     */
     virtual wxSize GetPixelSize() const;
-    
+
     /**
         Gets the font style. See ::wxFontStyle for a list of valid styles.
 
@@ -451,6 +511,11 @@ public:
     /**
         Returns @true if the font is a fixed width (or monospaced) font,
         @false if it is a proportional one or font is invalid.
+
+        Note that this function under some platforms is different than just testing
+        for the font family being equal to @c wxFONTFAMILY_TELETYPE because native
+        platform-specific functions are used for the check (resulting in a more
+        accurate return value).
     */
     virtual bool IsFixedWidth() const;
 
@@ -459,55 +524,158 @@ public:
     */
     virtual bool IsOk() const;
 
+    //@}
+
+
+    /**
+        @name Similar fonts creation
+
+        The functions in this section either modify the font in place or create
+        a new font similar to the given one but with its weight, style or size
+        changed.
+     */
     //@{
+
     /**
-        This function takes the same parameters as the relative
-        @ref wxFont::wxFont "wxFont constructor" and returns a new font
-        object allocated on the heap.
-    */
-    static wxFont* New(int pointSize, wxFontFamily family, wxFontStyle style,
-                       wxFontWeight weight,
-                       bool underline = false,
-                       const wxString& faceName = wxEmptyString,
-                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
-    static wxFont* New(int pointSize, wxFontFamily family,
-                       int flags = wxFONTFLAG_DEFAULT,
-                       const wxString& faceName = wxEmptyString,
-                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
-    static wxFont* New(const wxSize& pixelSize,
-                       wxFontFamily family,
-                       wxFontStyle style,
-                       wxFontWeight weight,
-                       bool underline = false,
-                       const wxString& faceName = wxEmptyString,
-                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
-    static wxFont* New(const wxSize& pixelSize,
-                       wxFontFamily family,
-                       int flags = wxFONTFLAG_DEFAULT,
-                       const wxString& faceName = wxEmptyString,
-                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
+        Return a bold version of this font.
+
+        @see MakeBold()
+
+        @since 2.9.1
+     */
+    wxFont Bold() const;
+
+    /**
+        Return an italic version of this font.
+
+        @see MakeItalic()
+
+        @since 2.9.1
+     */
+    wxFont Italic() const;
+
+    /**
+        Return a larger version of this font.
+
+        The font size is multiplied by CSS specification inspired factor of @c
+        1.2.
+
+        @see Larger(), MakeSmaller(), Scale()
+
+        @since 2.9.1
+     */
+    wxFont Larger() const;
+
+    /**
+        Changes this font to be bold.
+
+        @see Bold()
+
+        @since 2.9.1
+     */
+    wxFont& MakeBold();
+
+    /**
+        Changes this font to be italic.
+
+        @see Italic()
+
+        @since 2.9.1
+     */
+    wxFont& MakeItalic();
+
+    /**
+        Changes this font to be larger.
+
+        The font size is multiplied by CSS specification inspired factor of @c
+        1.2.
+
+        @see Larger(), MakeSmaller(), Scale()
+
+        @since 2.9.1
+     */
+    wxFont& MakeLarger();
+
+    /**
+        Return a smaller version of this font.
+
+        The font size is divided by CSS specification inspired factor of @c
+        1.2.
+
+        @see MakeLarger(), Scale(), Smaller()
+
+        @since 2.9.1
+     */
+    wxFont& MakeSmaller();
+
+    /**
+        Changes the size of this font.
+
+        The font size is multiplied by the given factor (which may be less than
+        1 to create a smaller version of the font).
+
+        @see Scaled(), MakeLarger(), MakeSmaller()
+
+        @since 2.9.1
+     */
+    wxFont& Scale(float x);
+
+    /**
+        Return a scaled version of this font.
+
+        The font size is multiplied by the given factor (which may be less than
+        1 to create a smaller version of the font).
+
+        @see Scale(), Larger(), Smaller()
+
+        @since 2.9.1
+     */
+    wxFont Scaled(float x) const;
+
+    /**
+        Return a smaller version of this font.
+
+        The font size is divided by CSS specification inspired factor of @c
+        1.2.
+
+        @see Larger(), MakeSmaller(), Scaled()
+
+        @since 2.9.1
+     */
+    wxFont Smaller() const;
+
     //@}
 
     /**
-        Sets the default font encoding.
+        @name Setters
 
-        @see @ref overview_fontencoding, GetDefaultEncoding()
+        These functions internally recreate the native font object with the new
+        specified property.
     */
-    static void SetDefaultEncoding(wxFontEncoding encoding);
+    //@{
+
+    /**
+        Sets the encoding for this font.
+
+        Note that under wxGTK this function has no effect (because the underlying
+        Pango library always uses @c wxFONTENCODING_UTF8).
+
+        @see GetEncoding()
+    */
+    virtual void SetEncoding(wxFontEncoding encoding);
 
     /**
         Sets the facename for the font.
-        Returns @true if the given face name exists; @false otherwise.
 
         @param faceName
             A valid facename, which should be on the end-user's system.
 
         @remarks To avoid portability problems, don't rely on a specific face,
-                 but specify the font family instead or as well.
-                 A suitable font will be found on the end-user's system.
-                 If both the family and the facename are specified,
-                 wxWidgets will first search for the specific face, and
-                 then for a font belonging to the same family.
+                 but specify the font family instead (see ::wxFontFamily and SetFamily()).
+
+        @return @true if the given face name exists; if the face name doesn't exist
+                in the user's system then the font is invalidated (so that IsOk() will
+                return @false) and @false is returned.
 
         @see GetFaceName(), SetFamily()
     */
@@ -516,6 +684,11 @@ public:
     /**
         Sets the font family.
 
+        As described in ::wxFontFamily docs the given @a family value acts as a rough,
+        basic indication of the main font properties (look, spacing).
+
+        Note that changing the font family results in changing the font face name.
+
         @param family
             One of the ::wxFontFamily values.
 
@@ -556,15 +729,21 @@ public:
         documentation of the native API used for font-rendering
         (e.g. @c pango_font_description_from_string on GTK).
 
+        Note that unlike SetNativeFontInfo(), this function doesn't always restore all
+        attributes of the wxFont object under all platforms; e.g. on wxMSW the font family
+        is not restored (because GetNativeFontInfoUserDesc doesn't return it on wxMSW).
+        If you want to serialize/deserialize a font in string form, you should use
+        GetNativeFontInfoDesc() and SetNativeFontInfo() instead.
+
         @see SetNativeFontInfo()
     */
     bool SetNativeFontInfoUserDesc(const wxString& info);
 
     /**
         Sets the point size.
-        
-        The <em>point size</em> is defined as 1/72 of the anglo-Saxon inch 
-        (25.4 mm): it is approximately 0.0139 inch or 352.8 um. 
+
+        The <em>point size</em> is defined as 1/72 of the anglo-Saxon inch
+        (25.4 mm): it is approximately 0.0139 inch or 352.8 um.
 
         @param pointSize
             Size in points.
@@ -575,19 +754,19 @@ public:
 
     /**
         Sets the pixel size.
-        
+
         The height parameter of @a pixelSize must be positive while the width
         parameter may also be zero (to indicate that you're not interested in the
         width of the characters: a suitable width will be chosen for best rendering).
-        
-        This feature (specifying the font pixel size) is directly supported only 
-        under wxMSW and wxGTK currently; under other platforms a font with the 
+
+        This feature (specifying the font pixel size) is directly supported only
+        under wxMSW and wxGTK currently; under other platforms a font with the
         closest size to the given one is found using binary search (this maybe slower).
 
         @see GetPixelSize()
     */
     virtual void SetPixelSize(const wxSize& pixelSize);
-    
+
     /**
         Sets the font style.
 
@@ -618,6 +797,9 @@ public:
     */
     virtual void SetWeight(wxFontWeight weight);
 
+    //@}
+
+
     /**
         Inequality operator.
 
@@ -638,6 +820,52 @@ public:
         Assignment operator, using @ref overview_refcount "reference counting".
     */
     wxFont& operator =(const wxFont& font);
+
+
+    // statics
+
+    /**
+        Returns the current application's default encoding.
+
+        @see @ref overview_fontencoding, SetDefaultEncoding()
+    */
+    static wxFontEncoding GetDefaultEncoding();
+
+    /**
+        Sets the default font encoding.
+
+        @see @ref overview_fontencoding, GetDefaultEncoding()
+    */
+    static void SetDefaultEncoding(wxFontEncoding encoding);
+
+    //@{
+    /**
+        This function takes the same parameters as the relative
+        @ref wxFont::wxFont "wxFont constructor" and returns a new font
+        object allocated on the heap.
+    */
+    static wxFont* New(int pointSize, wxFontFamily family, wxFontStyle style,
+                       wxFontWeight weight,
+                       bool underline = false,
+                       const wxString& faceName = wxEmptyString,
+                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
+    static wxFont* New(int pointSize, wxFontFamily family,
+                       int flags = wxFONTFLAG_DEFAULT,
+                       const wxString& faceName = wxEmptyString,
+                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
+    static wxFont* New(const wxSize& pixelSize,
+                       wxFontFamily family,
+                       wxFontStyle style,
+                       wxFontWeight weight,
+                       bool underline = false,
+                       const wxString& faceName = wxEmptyString,
+                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
+    static wxFont* New(const wxSize& pixelSize,
+                       wxFontFamily family,
+                       int flags = wxFONTFLAG_DEFAULT,
+                       const wxString& faceName = wxEmptyString,
+                       wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
+    //@}
 };
 
 
@@ -648,7 +876,7 @@ wxFont wxNullFont;
 
 /**
     Equivalent to wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).
-    
+
     @see wxSystemSettings
 */
 wxFont wxNORMAL_FONT;