src/univ/theme.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/theme.cpp
   3 // Purpose:     implementation of wxTheme
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "theme.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif // WX_PRECOMP
  35
  36 #include "wx/univ/renderer.h"
  37 #include "wx/univ/inphand.h"
  38 #include "wx/univ/theme.h"
  39
  40 // ============================================================================
  41 // implementation
  42 // ============================================================================
  43
  44 wxThemeInfo *wxTheme::ms_allThemes = (wxThemeInfo *)NULL;
  45 wxTheme *wxTheme::ms_theme = (wxTheme *)NULL;
  46
  47 // ----------------------------------------------------------------------------
  48 // "dynamic" theme creation
  49 // ----------------------------------------------------------------------------
  50
  51 wxThemeInfo::wxThemeInfo(Constructor c,
  52                          const wxChar *n,
  53                          const wxChar *d)
  54            : name(n), desc(d), ctor(c)
  55 {
  56     // insert us (in the head of) the linked list
  57     next = wxTheme::ms_allThemes;
  58     wxTheme::ms_allThemes = this;
  59 }
  60
  61 /* static */ wxTheme *wxTheme::Create(const wxString& name)
  62 {
  63     // find the theme in the list by name
  64     wxThemeInfo *info = ms_allThemes;
  65     while ( info )
  66     {
  67         if ( name == info->name )
  68         {
  69             return info->ctor();
  70         }
  71
  72         info = info->next;
  73     }
  74
  75     return (wxTheme *)NULL;
  76 }
  77
  78 // ----------------------------------------------------------------------------
  79 // the default theme (called by wxApp::OnInitGui)
  80 // ----------------------------------------------------------------------------
  81
  82 /* static */ bool wxTheme::CreateDefault()
  83 {
  84     if ( ms_theme )
  85     {
  86         // we already have a theme
  87         return TRUE;
  88     }
  89
  90     wxString nameDefTheme;
  91
  92     // use the environment variable first
  93     const wxChar *p = wxGetenv(_T("WXTHEME"));
  94     if ( p )
  95     {
  96         nameDefTheme = p;
  97     }
  98     else // use native theme by default
  99     {
 100         #if defined(__WXMSW__)
 101             nameDefTheme = _T("win32");
 102         #elif defined(__WXGTK__)
 103             nameDefTheme = _T("gtk");
 104         #endif
 105     }
 106
 107     ms_theme = Create(nameDefTheme);
 108
 109     // fallback to the first one in the list
 110     if ( !ms_theme && ms_allThemes )
 111     {
 112         ms_theme = ms_allThemes->ctor();
 113     }
 114
 115     // abort if still nothing
 116     if ( !ms_theme )
 117     {
 118         wxLogError(_("Failed to initialize GUI: no built-in themes found."));
 119
 120         return FALSE;
 121     }
 122
 123     return TRUE;
 124 }
 125
 126 /* static */ wxTheme *wxTheme::Set(wxTheme *theme)
 127 {
 128     wxTheme *themeOld = ms_theme;
 129     ms_theme = theme;
 130     return themeOld;
 131 }
 132
 133 // ----------------------------------------------------------------------------
 134 // assorted trivial dtors
 135 // ----------------------------------------------------------------------------
 136
 137 wxTheme::~wxTheme()
 138 {
 139 }
 140