include/wx/univ/theme.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/univ/theme.h
   3 // Purpose:     wxTheme class manages all configurable aspects of the
   4 //              application including the look (wxRenderer), feel
   5 //              (wxInputHandler) and the colours (wxColourScheme)
   6 // Author:      Vadim Zeitlin
   7 // Modified by:
   8 // Created:     06.08.00
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
  11 // Licence:     wxWindows licence
  12 ///////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef _WX_UNIV_THEME_H_
  15 #define _WX_UNIV_THEME_H_
  16
  17 #include "wx/string.h"
  18
  19 // ----------------------------------------------------------------------------
  20 // wxTheme
  21 // ----------------------------------------------------------------------------
  22
  23 class WXDLLEXPORT wxArtProvider;
  24 class WXDLLEXPORT wxColourScheme;
  25 class WXDLLEXPORT wxInputConsumer;
  26 class WXDLLEXPORT wxInputHandler;
  27 class WXDLLEXPORT wxRenderer;
  28 struct WXDLLEXPORT wxThemeInfo;
  29
  30 class WXDLLEXPORT wxTheme
  31 {
  32 public:
  33     // static methods
  34     // --------------
  35
  36     // create the default theme
  37     static bool CreateDefault();
  38
  39     // create the theme by name (will return NULL if not found)
  40     static wxTheme *Create(const wxString& name);
  41
  42     // change the current scheme
  43     static wxTheme *Set(wxTheme *theme);
  44
  45     // get the current theme (never NULL)
  46     static wxTheme *Get() { return ms_theme; }
  47
  48     // the theme methods
  49     // -----------------
  50
  51     // get the renderer implementing all the control-drawing operations in
  52     // this theme
  53     virtual wxRenderer *GetRenderer() = 0;
  54
  55     // get the art provider to be used together with this theme
  56     virtual wxArtProvider *GetArtProvider() = 0;
  57
  58     // get the input handler of the given type, forward to the standard one
  59     virtual wxInputHandler *GetInputHandler(const wxString& handlerType,
  60                                             wxInputConsumer *consumer) = 0;
  61
  62     // get the colour scheme for the control with this name
  63     virtual wxColourScheme *GetColourScheme() = 0;
  64
  65     // implementation only from now on
  66     // -------------------------------
  67
  68     virtual ~wxTheme();
  69
  70 private:
  71     // the list of descriptions of all known themes
  72     static wxThemeInfo *ms_allThemes;
  73
  74     // the current theme
  75     static wxTheme *ms_theme;
  76     friend struct WXDLLEXPORT wxThemeInfo;
  77 };
  78
  79 // ----------------------------------------------------------------------------
  80 // wxDelegateTheme: it is impossible to inherit from any of standard
  81 // themes as their declarations are in private code, but you can use this
  82 // class to override only some of their functions - all the other ones
  83 // will be left to the original theme
  84 // ----------------------------------------------------------------------------
  85
  86 class wxDelegateTheme : public wxTheme
  87 {
  88 public:
  89     wxDelegateTheme(const wxChar *theme);
  90     virtual ~wxDelegateTheme();
  91
  92     virtual wxRenderer *GetRenderer();
  93     virtual wxArtProvider *GetArtProvider();
  94     virtual wxInputHandler *GetInputHandler(const wxString& control,
  95                                             wxInputConsumer *consumer);
  96     virtual wxColourScheme *GetColourScheme();
  97
  98 protected:
  99     // gets or creates theme and sets m_theme to point to it,
 100     // returns true on success
 101     bool GetOrCreateTheme();
 102
 103     wxString    m_themeName;
 104     wxTheme    *m_theme;
 105 };
 106
 107 // ----------------------------------------------------------------------------
 108 // dynamic theme creation helpers
 109 // ----------------------------------------------------------------------------
 110
 111 struct WXDLLEXPORT wxThemeInfo
 112 {
 113     typedef wxTheme *(*Constructor)();
 114
 115     // theme name and (user readable) description
 116     wxString name, desc;
 117
 118     // the function to create a theme object
 119     Constructor ctor;
 120
 121     // next node in the linked list or NULL
 122     wxThemeInfo *next;
 123
 124     // constructor for the struct itself
 125     wxThemeInfo(Constructor ctor, const wxChar *name, const wxChar *desc);
 126 };
 127
 128 // ----------------------------------------------------------------------------
 129 // macros
 130 // ----------------------------------------------------------------------------
 131
 132 // to use a standard theme insert this macro into one of the application files:
 133 // without it, an over optimizing linker may discard the object module
 134 // containing the theme implementation entirely
 135 #define WX_USE_THEME(themename)                                             \
 136     /* this indirection makes it possible to pass macro as the argument */  \
 137     WX_USE_THEME_IMPL(themename)
 138
 139 #define WX_USE_THEME_IMPL(themename)                                        \
 140     extern WXDLLEXPORT_DATA(bool) wxThemeUse##themename;                    \
 141     static struct wxThemeUserFor##themename                                 \
 142     {                                                                       \
 143         wxThemeUserFor##themename() { wxThemeUse##themename = true; }       \
 144     } wxThemeDoUse##themename
 145
 146 // to declare a new theme, this macro must be used in the class declaration
 147 #define WX_DECLARE_THEME(themename)                                         \
 148     private:                                                                \
 149         static wxThemeInfo ms_info##themename;                              \
 150     public:                                                                 \
 151         const wxThemeInfo *GetThemeInfo() const                             \
 152             { return &ms_info##themename; }
 153
 154 // and this one must be inserted in the source file
 155 #define WX_IMPLEMENT_THEME(classname, themename, themedesc)                 \
 156     WXDLLEXPORT_DATA(bool) wxThemeUse##themename = true;                    \
 157     wxTheme *wxCtorFor##themename() { return new classname; }               \
 158     wxThemeInfo classname::ms_info##themename(wxCtorFor##themename,         \
 159                                               wxT( #themename ), themedesc)
 160
 161 // ----------------------------------------------------------------------------
 162 // determine default theme
 163 // ----------------------------------------------------------------------------
 164
 165 #if wxUSE_ALL_THEMES
 166     #undef  wxUSE_THEME_WIN32
 167     #define wxUSE_THEME_WIN32  1
 168     #undef  wxUSE_THEME_GTK
 169     #define wxUSE_THEME_GTK    1
 170     #undef  wxUSE_THEME_MONO
 171     #define wxUSE_THEME_MONO   1
 172     #undef  wxUSE_THEME_METAL
 173     #define wxUSE_THEME_METAL  1
 174 #endif // wxUSE_ALL_THEMES
 175
 176 // determine the default theme to use:
 177 #if defined(__WXGTK__) && wxUSE_THEME_GTK
 178     #define wxUNIV_DEFAULT_THEME gtk
 179 #elif defined(__WXDFB__) && wxUSE_THEME_MONO
 180     // use mono theme for DirectFB port because it cannot correctly
 181     // render neither win32 nor gtk themes yet:
 182     #define wxUNIV_DEFAULT_THEME mono
 183 #endif
 184
 185 // if no theme was picked, get any theme compiled in (sorted by
 186 // quality/completeness of the theme):
 187 #ifndef wxUNIV_DEFAULT_THEME
 188     #if wxUSE_THEME_WIN32
 189         #define wxUNIV_DEFAULT_THEME win32
 190     #elif wxUSE_THEME_GTK
 191         #define wxUNIV_DEFAULT_THEME gtk
 192     #elif wxUSE_THEME_MONO
 193         #define wxUNIV_DEFAULT_THEME mono
 194     #endif
 195     // If nothing matches, no themes are compiled and the app must provide
 196     // some theme itself
 197     // (note that wxUSE_THEME_METAL depends on win32 theme, so we don't have to
 198     // try it)
 199     //
 200 #endif // !wxUNIV_DEFAULT_THEME
 201
 202 #endif // _WX_UNIV_THEME_H_