better native font support for wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13642 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/font.h

@@ -36,7 +36,10 @@ class WXDLLEXPORT wxFont;
 // font constants
 // ----------------------------------------------------------------------------
 
-// standard font families
+// 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
 enum wxFontFamily
 {
     wxFONTFAMILY_DEFAULT = wxDEFAULT,
@@ -46,7 +49,8 @@ enum wxFontFamily
     wxFONTFAMILY_SWISS = wxSWISS,
     wxFONTFAMILY_MODERN = wxMODERN,
     wxFONTFAMILY_TELETYPE = wxTELETYPE,
-    wxFONTFAMILY_MAX
+    wxFONTFAMILY_MAX,
+    wxFONTFAMILY_UNKNOWN = wxFONTFAMILY_MAX
 };
 
 // font styles

include/wx/fontutil.h

@@ -34,6 +34,9 @@
 #if defined(_WX_X_FONTLIKE)
 
 // the symbolic names for the XLFD fields (with examples for their value)
+//
+// NB: we suppose that the font always starts with the empty token (font name
+//     registry field) as we never use nor generate it anyhow
 enum wxXLFDField
 {
     wxXLFD_FOUNDRY,     // adobe
@@ -70,24 +73,39 @@ enum wxXLFDField
 struct WXDLLEXPORT wxNativeFontInfo
 {
 #if defined(_WX_X_FONTLIKE)
-    // the fonts array can't be accessed directly as we only parse the
-    // xFontName when needed
+    // the members can't be accessed directly as we only parse the
+    // xFontName on demand
 private:
     // the components of the XLFD
     wxString     fontElements[wxXLFD_MAX];
 
-public:
     // the full XLFD
     wxString     xFontName;
 
+    // true until SetXFontName() is called
+    bool         m_isDefault;
+
+    // return true if we have already initialized fontElements
+    inline bool HasElements() const;
+
+public:
     // init the elements from an XLFD, return TRUE if ok
     bool FromXFontName(const wxString& xFontName);
 
-    // generate an XLFD using the fontElements
+    // return false if we were never initialized with a valid XLFD
+    bool IsDefault() const { return m_isDefault; }
+
+    // return the XLFD (using the fontElements if necessary)
     wxString GetXFontName() const;
 
     // get the given XFLD component
     wxString GetXFontComponent(wxXLFDField field) const;
+
+    // change the font component
+    void SetXFontComponent(wxXLFDField field, const wxString& value);
+
+    // set the XFLD
+    void SetXFontName(const wxString& xFontName);
 #elif defined(__WXMSW__)
     LOGFONT      lf;
 #elif defined(__WXPM__)

include/wx/gtk/font.h

@@ -36,12 +36,13 @@ public:
     // ctors and such
     wxFont() { Init(); }
     wxFont(const wxFont& font) : wxFontBase() { Init(); Ref(font); }
-    wxFont(const wxString& fontname,
-           wxFontEncoding fontenc = wxFONTENCODING_DEFAULT)
+
+    // wxGTK-specific
+    wxFont(const wxString& fontname)
     {
         Init();
 
-        Create(fontname, fontenc);
+        Create(fontname);
     }
 
     wxFont(const wxNativeFontInfo& info);
@@ -68,9 +69,7 @@ public:
                 wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
 
     // wxGTK-specific
-    bool Create(const wxString& fontname,
-                wxFontEncoding fontenc = wxFONTENCODING_DEFAULT);
-    bool Create(const wxNativeFontInfo& fontinfo);
+    bool Create(const wxString& fontname);
 
     ~wxFont();
 
@@ -108,9 +107,6 @@ protected:
     // common part of all ctors
     void Init();
 
-    // do we have the XFLD for this font (or just wxWin description)?
-    inline bool HasNativeFont() const;
-
 private:
     DECLARE_DYNAMIC_CLASS(wxFont)
 };

include/wx/gtk1/font.h

@@ -36,12 +36,13 @@ public:
     // ctors and such
     wxFont() { Init(); }
     wxFont(const wxFont& font) : wxFontBase() { Init(); Ref(font); }
-    wxFont(const wxString& fontname,
-           wxFontEncoding fontenc = wxFONTENCODING_DEFAULT)
+
+    // wxGTK-specific
+    wxFont(const wxString& fontname)
     {
         Init();
 
-        Create(fontname, fontenc);
+        Create(fontname);
     }
 
     wxFont(const wxNativeFontInfo& info);
@@ -68,9 +69,7 @@ public:
                 wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
 
     // wxGTK-specific
-    bool Create(const wxString& fontname,
-                wxFontEncoding fontenc = wxFONTENCODING_DEFAULT);
-    bool Create(const wxNativeFontInfo& fontinfo);
+    bool Create(const wxString& fontname);
 
     ~wxFont();
 
@@ -108,9 +107,6 @@ protected:
     // common part of all ctors
     void Init();
 
-    // do we have the XFLD for this font (or just wxWin description)?
-    inline bool HasNativeFont() const;
-
 private:
     DECLARE_DYNAMIC_CLASS(wxFont)
 };

include/wx/unix/fontutil.h

@@ -31,4 +31,7 @@ wxLoadQueryNearestFont(int pointSize,
                        wxFontEncoding encoding,
                        wxString* xFontName = (wxString *)NULL);
 
+// returns the font specified by the given XLFD
+extern inline wxNativeFont wxLoadFont(const wxString& fontSpec);
+
 #endif // _WX_UNIX_FONTUTIL_H_