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 = NULL;
  43 wxTheme *wxTheme::ms_theme = NULL;
  44
  45 // ----------------------------------------------------------------------------
  46 // "dynamic" theme creation
  47 // ----------------------------------------------------------------------------
  48
  49 wxThemeInfo::wxThemeInfo(Constructor c,
  50                          const wxString& n,
  51                          const wxString& 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 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 #ifdef wxUNIV_DEFAULT_THEME
  97     else // use native theme by default
  98     {
  99         nameDefTheme = wxSTRINGIZE_T(wxUNIV_DEFAULT_THEME);
 100     }
 101 #endif // wxUNIV_DEFAULT_THEME
 102
 103     wxTheme *theme = Create(nameDefTheme);
 104
 105     // fallback to the first one in the list
 106     if ( !theme && ms_allThemes )
 107     {
 108         theme = ms_allThemes->ctor();
 109     }
 110
 111     // abort if still nothing
 112     if ( !theme )
 113     {
 114         wxLogError(_("Failed to initialize GUI: no built-in themes found."));
 115
 116         return false;
 117     }
 118
 119     // Set the theme as current.
 120     wxTheme::Set(theme);
 121
 122     return true;
 123 }
 124
 125 /* static */ wxTheme *wxTheme::Set(wxTheme *theme)
 126 {
 127     wxTheme *themeOld = ms_theme;
 128     ms_theme = theme;
 129
 130     if ( ms_theme )
 131     {
 132         // automatically start using the art provider of the new theme if it
 133         // has one
 134         wxArtProvider *art = ms_theme->GetArtProvider();
 135         if ( art )
 136             wxArtProvider::Push(art);
 137     }
 138
 139     return themeOld;
 140 }
 141
 142 // ----------------------------------------------------------------------------
 143 // assorted trivial dtors
 144 // ----------------------------------------------------------------------------
 145
 146 wxTheme::~wxTheme()
 147 {
 148 }
 149
 150
 151 // ----------------------------------------------------------------------------
 152 // wxDelegateTheme
 153 // ----------------------------------------------------------------------------
 154
 155 wxDelegateTheme::wxDelegateTheme(const wxString& theme)
 156 {
 157     m_themeName = theme;
 158     m_theme = NULL;
 159 }
 160
 161 wxDelegateTheme::~wxDelegateTheme()
 162 {
 163     delete m_theme;
 164 }
 165
 166 bool wxDelegateTheme::GetOrCreateTheme()
 167 {
 168     if ( !m_theme )
 169         m_theme = wxTheme::Create(m_themeName);
 170     return m_theme != NULL;
 171 }
 172
 173 wxRenderer *wxDelegateTheme::GetRenderer()
 174 {
 175     if ( !GetOrCreateTheme() )
 176         return NULL;
 177
 178     return m_theme->GetRenderer();
 179 }
 180
 181 wxArtProvider *wxDelegateTheme::GetArtProvider()
 182 {
 183     if ( !GetOrCreateTheme() )
 184         return NULL;
 185
 186     return m_theme->GetArtProvider();
 187 }
 188
 189 wxInputHandler *wxDelegateTheme::GetInputHandler(const wxString& control,
 190                                                  wxInputConsumer *consumer)
 191 {
 192     if ( !GetOrCreateTheme() )
 193         return NULL;
 194
 195     return m_theme->GetInputHandler(control, consumer);
 196 }
 197
 198 wxColourScheme *wxDelegateTheme::GetColourScheme()
 199 {
 200     if ( !GetOrCreateTheme() )
 201         return NULL;
 202
 203     return m_theme->GetColourScheme();
 204 }