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 license
  12 ///////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef _WX_UNIV_THEME_H_
  15 #define _WX_UNIV_THEME_H_
  16
  17 #ifdef __GNUG__
  18     #pragma interface "theme.h"
  19 #endif
  20
  21 // ----------------------------------------------------------------------------
  22 // wxTheme
  23 // ----------------------------------------------------------------------------
  24
  25 class WXDLLEXPORT wxRenderer;
  26 class WXDLLEXPORT wxColourScheme;
  27 class WXDLLEXPORT wxInputHandler;
  28 class WXDLLEXPORT wxArtProvider;
  29 struct WXDLLEXPORT wxThemeInfo;
  30
  31 class WXDLLEXPORT wxTheme
  32 {
  33 public:
  34     // static methods
  35     // --------------
  36
  37     // create the default theme
  38     static bool CreateDefault();
  39
  40     // create the theme by name (will return NULL if not found)
  41     static wxTheme *Create(const wxString& name);
  42
  43     // change the current scheme
  44     static wxTheme *Set(wxTheme *theme);
  45
  46     // get the current theme (never NULL)
  47     static wxTheme *Get() { return ms_theme; }
  48
  49     // the theme methods
  50     // -----------------
  51
  52     // get the renderer implementing all the control-drawing operations in
  53     // this theme
  54     virtual wxRenderer *GetRenderer() = 0;
  55
  56     // get the art provider to be used together with this theme
  57     virtual wxArtProvider *GetArtProvider() = 0;
  58
  59     // get the input handler of the given type
  60     virtual wxInputHandler *GetInputHandler(const wxString& handlerType) = 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 // dynamic theme creation helpers
  81 // ----------------------------------------------------------------------------
  82
  83 struct WXDLLEXPORT wxThemeInfo
  84 {
  85     typedef wxTheme *(*Constructor)();
  86
  87     // theme name and (user readable) description
  88     wxString name, desc;
  89
  90     // the function to create a theme object
  91     Constructor ctor;
  92
  93     // next node in the linked list or NULL
  94     wxThemeInfo *next;
  95
  96     // constructor for the struct itself
  97     wxThemeInfo(Constructor ctor, const wxChar *name, const wxChar *desc);
  98 };
  99
 100 // ----------------------------------------------------------------------------
 101 // macros
 102 // ----------------------------------------------------------------------------
 103
 104 // to use a standard theme insert this macro into one of the application files:
 105 // without it, an over optimizing linker may discard the object module
 106 // containing the theme implementation entirely
 107 #define WX_USE_THEME(themename)                                             \
 108     WXDLLEXPORT_DATA(extern bool) wxThemeUse##themename;                    \
 109     static struct wxThemeUserFor##themename                                 \
 110     {                                                                       \
 111         wxThemeUserFor##themename() { wxThemeUse##themename = TRUE; }       \
 112     } wxThemeDoUse##themename
 113
 114 // to declare a new theme, this macro must be used in the class declaration
 115 #define WX_DECLARE_THEME(themename)                                         \
 116     private:                                                                \
 117         static wxThemeInfo ms_info##themename;                              \
 118     public:                                                                 \
 119         const wxThemeInfo *GetThemeInfo() const                             \
 120             { return &ms_info##themename; }
 121
 122 // and this one must be inserted in the source file
 123 #define WX_IMPLEMENT_THEME(classname, themename, themedesc)                 \
 124     WXDLLEXPORT_DATA(bool) wxThemeUse##themename = TRUE;                    \
 125     wxTheme *wxCtorFor##themename() { return new classname; }               \
 126     wxThemeInfo classname::ms_info##themename(wxCtorFor##themename,         \
 127                                               wxT( #themename ), themedesc)
 128
 129 #endif // _WX_UNIV_THEME_H_
 130