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 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/intl.h"
  29     #include "wx/log.h"
  30 #endif // WX_PRECOMP
  31
  32 #include "wx/artprov.h"
  33
  34 #include "wx/univ/renderer.h"
  35 #include "wx/univ/inphand.h"
  36 #include "wx/univ/theme.h"
  37
  38 // ============================================================================
  39 // implementation
  40 // ============================================================================
  41
  42 wxThemeInfo *wxTheme::ms_allThemes = (wxThemeInfo *)NULL;
  43 wxTheme *wxTheme::ms_theme = (wxTheme *)NULL;
  44
  45 // ----------------------------------------------------------------------------
  46 // "dynamic" theme creation
  47 // ----------------------------------------------------------------------------
  48
  49 wxThemeInfo::wxThemeInfo(Constructor c,
  50                          const wxChar *n,
  51                          const wxChar *d)
  52            : name(n), desc(d), ctor(c)
  53 {
  54     // insert us (in the head of) the linked list
  55     next = wxTheme::ms_allThemes;
  56     wxTheme::ms_allThemes = this;
  57 }
  58
  59 /* static */ wxTheme *wxTheme::Create(const wxString& name)
  60 {
  61     // find the theme in the list by name
  62     wxThemeInfo *info = ms_allThemes;
  63     while ( info )
  64     {
  65         if ( name.CmpNoCase(info->name) == 0 )
  66         {
  67             return info->ctor();
  68         }
  69
  70         info = info->next;
  71     }
  72
  73     return (wxTheme *)NULL;
  74 }
  75
  76 // ----------------------------------------------------------------------------
  77 // the default theme (called by wxApp::OnInitGui)
  78 // ----------------------------------------------------------------------------
  79
  80 /* static */ bool wxTheme::CreateDefault()
  81 {
  82     if ( ms_theme )
  83     {
  84         // we already have a theme
  85         return true;
  86     }
  87
  88     wxString nameDefTheme;
  89
  90     // use the environment variable first
  91     const wxChar *p = wxGetenv(_T("WXTHEME"));
  92     if ( p )
  93     {
  94         nameDefTheme = p;
  95     }
  96     else // use native theme by default
  97     {
  98         #if defined(__WXGTK__)
  99             nameDefTheme = _T("gtk");
 100         #elif defined(__WXX11__)
 101             nameDefTheme = _T("win32");
 102         #else
 103             nameDefTheme = _T("win32");
 104         #endif
 105     }
 106
 107     wxTheme *theme = Create(nameDefTheme);
 108
 109     // fallback to the first one in the list
 110     if ( !theme && ms_allThemes )
 111     {
 112         theme = ms_allThemes->ctor();
 113     }
 114
 115     // abort if still nothing
 116     if ( !theme )
 117     {
 118         wxLogError(_("Failed to initialize GUI: no built-in themes found."));
 119
 120         return false;
 121     }
 122
 123     // Set the theme as current.
 124     wxTheme::Set(theme);
 125
 126     return true;
 127 }
 128
 129 /* static */ wxTheme *wxTheme::Set(wxTheme *theme)
 130 {
 131     wxTheme *themeOld = ms_theme;
 132     ms_theme = theme;
 133
 134     if ( ms_theme )
 135     {
 136         // automatically start using the art provider of the new theme if it
 137         // has one
 138         wxArtProvider *art = ms_theme->GetArtProvider();
 139         if ( art )
 140             wxArtProvider::Push(art);
 141     }
 142
 143     return themeOld;
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // assorted trivial dtors
 148 // ----------------------------------------------------------------------------
 149
 150 wxTheme::~wxTheme()
 151 {
 152 }
 153