src/univ/theme.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/univ/theme.cpp
   3 // Purpose:     implementation of wxTheme
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.08.00
   7 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ===========================================================================
  12 // declarations
  13 // ===========================================================================
  14
  15 // ---------------------------------------------------------------------------
  16 // headers
  17 // ---------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/intl.h"
  28     #include "wx/log.h"
  29 #endif // WX_PRECOMP
  30
  31 #include "wx/artprov.h"
  32
  33 #include "wx/univ/renderer.h"
  34 #include "wx/univ/inphand.h"
  35 #include "wx/univ/theme.h"
  36
  37 // ============================================================================
  38 // implementation
  39 // ============================================================================
  40
  41 wxThemeInfo *wxTheme::ms_allThemes = NULL;
  42 wxTheme *wxTheme::ms_theme = NULL;
  43
  44 // ----------------------------------------------------------------------------
  45 // "dynamic" theme creation
  46 // ----------------------------------------------------------------------------
  47
  48 wxThemeInfo::wxThemeInfo(Constructor c,
  49                          const wxString& n,
  50                          const wxString& d)
  51            : name(n), desc(d), ctor(c)
  52 {
  53     // insert us (in the head of) the linked list
  54     next = wxTheme::ms_allThemes;
  55     wxTheme::ms_allThemes = this;
  56 }
  57
  58 /* static */ wxTheme *wxTheme::Create(const wxString& name)
  59 {
  60     // find the theme in the list by name
  61     wxThemeInfo *info = ms_allThemes;
  62     while ( info )
  63     {
  64         if ( name.CmpNoCase(info->name) == 0 )
  65         {
  66             return info->ctor();
  67         }
  68
  69         info = info->next;
  70     }
  71
  72     return NULL;
  73 }
  74
  75 // ----------------------------------------------------------------------------
  76 // the default theme (called by wxApp::OnInitGui)
  77 // ----------------------------------------------------------------------------
  78
  79 /* static */ bool wxTheme::CreateDefault()
  80 {
  81     if ( ms_theme )
  82     {
  83         // we already have a theme
  84         return true;
  85     }
  86
  87     wxString nameDefTheme;
  88
  89     // use the environment variable first
  90     const wxChar *p = wxGetenv(wxT("WXTHEME"));
  91     if ( p )
  92     {
  93         nameDefTheme = p;
  94     }
  95 #ifdef wxUNIV_DEFAULT_THEME
  96     else // use native theme by default
  97     {
  98         nameDefTheme = wxSTRINGIZE_T(wxUNIV_DEFAULT_THEME);
  99     }
 100 #endif // wxUNIV_DEFAULT_THEME
 101
 102     wxTheme *theme = Create(nameDefTheme);
 103
 104     // fallback to the first one in the list
 105     if ( !theme && ms_allThemes )
 106     {
 107         theme = ms_allThemes->ctor();
 108     }
 109
 110     // abort if still nothing
 111     if ( !theme )
 112     {
 113         wxLogError(_("Failed to initialize GUI: no built-in themes found."));
 114
 115         return false;
 116     }
 117
 118     // Set the theme as current.
 119     wxTheme::Set(theme);
 120
 121     return true;
 122 }
 123
 124 /* static */ wxTheme *wxTheme::Set(wxTheme *theme)
 125 {
 126     wxTheme *themeOld = ms_theme;
 127     ms_theme = theme;
 128
 129     if ( ms_theme )
 130     {
 131         // automatically start using the art provider of the new theme if it
 132         // has one
 133         wxArtProvider *art = ms_theme->GetArtProvider();
 134         if ( art )
 135             wxArtProvider::Push(art);
 136     }
 137
 138     return themeOld;
 139 }
 140
 141 // ----------------------------------------------------------------------------
 142 // assorted trivial dtors
 143 // ----------------------------------------------------------------------------
 144
 145 wxTheme::~wxTheme()
 146 {
 147 }
 148
 149
 150 // ----------------------------------------------------------------------------
 151 // wxDelegateTheme
 152 // ----------------------------------------------------------------------------
 153
 154 wxDelegateTheme::wxDelegateTheme(const wxString& theme)
 155 {
 156     m_themeName = theme;
 157     m_theme = NULL;
 158 }
 159
 160 wxDelegateTheme::~wxDelegateTheme()
 161 {
 162     delete m_theme;
 163 }
 164
 165 bool wxDelegateTheme::GetOrCreateTheme()
 166 {
 167     if ( !m_theme )
 168         m_theme = wxTheme::Create(m_themeName);
 169     return m_theme != NULL;
 170 }
 171
 172 wxRenderer *wxDelegateTheme::GetRenderer()
 173 {
 174     if ( !GetOrCreateTheme() )
 175         return NULL;
 176
 177     return m_theme->GetRenderer();
 178 }
 179
 180 wxArtProvider *wxDelegateTheme::GetArtProvider()
 181 {
 182     if ( !GetOrCreateTheme() )
 183         return NULL;
 184
 185     return m_theme->GetArtProvider();
 186 }
 187
 188 wxInputHandler *wxDelegateTheme::GetInputHandler(const wxString& control,
 189                                                  wxInputConsumer *consumer)
 190 {
 191     if ( !GetOrCreateTheme() )
 192         return NULL;
 193
 194     return m_theme->GetInputHandler(control, consumer);
 195 }
 196
 197 wxColourScheme *wxDelegateTheme::GetColourScheme()
 198 {
 199     if ( !GetOrCreateTheme() )
 200         return NULL;
 201
 202     return m_theme->GetColourScheme();
 203 }