include/wx/apptrait.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/apptrait.h
   3 // Purpose:     declaration of wxAppTraits and derived classes
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.06.2003
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_APPTRAIT_H_
  13 #define _WX_APPTRAIT_H_
  14
  15 #include "wx/string.h"
  16 #include "wx/platinfo.h"
  17
  18 class WXDLLIMPEXP_FWD_BASE wxArrayString;
  19 class WXDLLIMPEXP_FWD_BASE wxConfigBase;
  20 class WXDLLIMPEXP_FWD_BASE wxEventLoopBase;
  21 #if wxUSE_FONTMAP
  22     class WXDLLIMPEXP_FWD_CORE wxFontMapper;
  23 #endif // wxUSE_FONTMAP
  24 class WXDLLIMPEXP_FWD_BASE wxLog;
  25 class WXDLLIMPEXP_FWD_BASE wxMessageOutput;
  26 class WXDLLIMPEXP_FWD_BASE wxObject;
  27 class WXDLLIMPEXP_FWD_CORE wxRendererNative;
  28 class WXDLLIMPEXP_FWD_BASE wxStandardPaths;
  29 class WXDLLIMPEXP_FWD_BASE wxString;
  30 class WXDLLIMPEXP_FWD_BASE wxTimer;
  31 class WXDLLIMPEXP_FWD_BASE wxTimerImpl;
  32
  33 class wxSocketManager;
  34
  35
  36 // ----------------------------------------------------------------------------
  37 // wxAppTraits: this class defines various configurable aspects of wxApp
  38 // ----------------------------------------------------------------------------
  39
  40 class WXDLLIMPEXP_BASE wxAppTraitsBase
  41 {
  42 public:
  43     // needed since this class declares virtual members
  44     virtual ~wxAppTraitsBase() { }
  45
  46     // hooks for working with the global objects, may be overridden by the user
  47     // ------------------------------------------------------------------------
  48
  49 #if wxUSE_CONFIG
  50     // create the default configuration object (base class version is
  51     // implemented in config.cpp and creates wxRegConfig for wxMSW and
  52     // wxFileConfig for all the other platforms)
  53     virtual wxConfigBase *CreateConfig();
  54 #endif // wxUSE_CONFIG
  55
  56 #if wxUSE_LOG
  57     // create the default log target
  58     virtual wxLog *CreateLogTarget() = 0;
  59 #endif // wxUSE_LOG
  60
  61     // create the global object used for printing out messages
  62     virtual wxMessageOutput *CreateMessageOutput() = 0;
  63
  64 #if wxUSE_FONTMAP
  65     // create the global font mapper object used for encodings/charset mapping
  66     virtual wxFontMapper *CreateFontMapper() = 0;
  67 #endif // wxUSE_FONTMAP
  68
  69     // get the renderer to use for drawing the generic controls (return value
  70     // may be NULL in which case the default renderer for the current platform
  71     // is used); this is used in GUI only and always returns NULL in console
  72     //
  73     // NB: returned pointer will be deleted by the caller
  74     virtual wxRendererNative *CreateRenderer() = 0;
  75
  76     // wxStandardPaths object is normally the same for wxBase and wxGUI
  77     // except in the case of wxMac and wxCocoa
  78     virtual wxStandardPaths& GetStandardPaths();
  79
  80 #if wxUSE_INTL
  81     // called during wxApp initialization to set the locale to correspond to
  82     // the user default (i.e. system locale under Windows, LC_ALL under Unix)
  83     virtual void SetLocale();
  84 #endif // wxUSE_INTL
  85
  86
  87     // functions abstracting differences between GUI and console modes
  88     // ------------------------------------------------------------------------
  89
  90     // show the assert dialog with the specified message in GUI or just print
  91     // the string to stderr in console mode
  92     //
  93     // base class version has an implementation (in spite of being pure
  94     // virtual) in base/appbase.cpp which can be called as last resort.
  95     //
  96     // return true to suppress subsequent asserts, false to continue as before
  97     virtual bool ShowAssertDialog(const wxString& msg) = 0;
  98
  99     // return true if fprintf(stderr) goes somewhere, false otherwise
 100     virtual bool HasStderr() = 0;
 101
 102 #if wxUSE_SOCKETS
 103     // this function is used by wxNet library to set the default socket manager
 104     // to use: doing it like this allows us to keep all socket-related code in
 105     // wxNet instead of having to pull it in wxBase itself as we'd have to do
 106     // if we really implemented wxSocketManager here
 107     //
 108     // we don't take ownership of this pointer, it should have a lifetime
 109     // greater than that of any socket (e.g. be a pointer to a static object)
 110     static void SetDefaultSocketManager(wxSocketManager *manager)
 111     {
 112         ms_manager = manager;
 113     }
 114
 115     // return socket manager: this is usually different for console and GUI
 116     // applications (although some ports use the same implementation for both)
 117     virtual wxSocketManager *GetSocketManager() { return ms_manager; }
 118 #endif
 119
 120     // create a new, port specific, instance of the event loop used by wxApp
 121     virtual wxEventLoopBase *CreateEventLoop() = 0;
 122
 123 #if wxUSE_TIMER
 124     // return platform and toolkit dependent wxTimer implementation
 125     virtual wxTimerImpl *CreateTimerImpl(wxTimer *timer) = 0;
 126 #endif
 127
 128 #if wxUSE_THREADS
 129     virtual void MutexGuiEnter();
 130     virtual void MutexGuiLeave();
 131 #endif
 132
 133     // functions returning port-specific information
 134     // ------------------------------------------------------------------------
 135
 136     // return information about the (native) toolkit currently used and its
 137     // runtime (not compile-time) version.
 138     // returns wxPORT_BASE for console applications and one of the remaining
 139     // wxPORT_* values for GUI applications.
 140     virtual wxPortId GetToolkitVersion(int *majVer = NULL, int *minVer = NULL) const = 0;
 141
 142     // return true if the port is using wxUniversal for the GUI, false if not
 143     virtual bool IsUsingUniversalWidgets() const = 0;
 144
 145     // return the name of the Desktop Environment such as
 146     // "KDE" or "GNOME". May return an empty string.
 147     virtual wxString GetDesktopEnvironment() const = 0;
 148
 149     // returns a short string to identify the block of the standard command
 150     // line options parsed automatically by current port: if this string is
 151     // empty, there are no such options, otherwise the function also fills
 152     // passed arrays with the names and the descriptions of those options.
 153     virtual wxString GetStandardCmdLineOptions(wxArrayString& names,
 154                                                wxArrayString& desc) const
 155     {
 156         wxUnusedVar(names);
 157         wxUnusedVar(desc);
 158
 159         return wxEmptyString;
 160     }
 161
 162
 163 protected:
 164 #if wxUSE_STACKWALKER
 165     // utility function: returns the stack frame as a plain wxString
 166     virtual wxString GetAssertStackTrace();
 167 #endif
 168
 169 private:
 170     static wxSocketManager *ms_manager;
 171 };
 172
 173 // ----------------------------------------------------------------------------
 174 // include the platform-specific version of the class
 175 // ----------------------------------------------------------------------------
 176
 177 // NB:  test for __UNIX__ before __WXMAC__ as under Darwin we want to use the
 178 //      Unix code (and otherwise __UNIX__ wouldn't be defined)
 179 // ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port
 180 #if defined(__WIN32__)
 181     #include "wx/msw/apptbase.h"
 182 #elif defined(__UNIX__) && !defined(__EMX__)
 183     #include "wx/unix/apptbase.h"
 184 #elif defined(__OS2__)
 185     #include "wx/os2/apptbase.h"
 186 #else // no platform-specific methods to add to wxAppTraits
 187     // wxAppTraits must be a class because it was forward declared as class
 188     class WXDLLIMPEXP_BASE wxAppTraits : public wxAppTraitsBase
 189     {
 190     };
 191 #endif // platform
 192
 193 // ============================================================================
 194 // standard traits for console and GUI applications
 195 // ============================================================================
 196
 197 // ----------------------------------------------------------------------------
 198 // wxConsoleAppTraitsBase: wxAppTraits implementation for the console apps
 199 // ----------------------------------------------------------------------------
 200
 201 class WXDLLIMPEXP_BASE wxConsoleAppTraitsBase : public wxAppTraits
 202 {
 203 public:
 204 #if !wxUSE_CONSOLE_EVENTLOOP
 205     virtual wxEventLoopBase *CreateEventLoop() { return NULL; }
 206 #endif // !wxUSE_CONSOLE_EVENTLOOP
 207
 208 #if wxUSE_LOG
 209     virtual wxLog *CreateLogTarget();
 210 #endif // wxUSE_LOG
 211     virtual wxMessageOutput *CreateMessageOutput();
 212 #if wxUSE_FONTMAP
 213     virtual wxFontMapper *CreateFontMapper();
 214 #endif // wxUSE_FONTMAP
 215     virtual wxRendererNative *CreateRenderer();
 216
 217     virtual bool ShowAssertDialog(const wxString& msg);
 218     virtual bool HasStderr();
 219
 220     // the GetToolkitVersion for console application is always the same
 221     virtual wxPortId GetToolkitVersion(int *verMaj = NULL, int *verMin = NULL) const
 222     {
 223         // no toolkits (wxBase is for console applications without GUI support)
 224         // NB: zero means "no toolkit", -1 means "not initialized yet"
 225         //     so we must use zero here!
 226         if (verMaj) *verMaj = 0;
 227         if (verMin) *verMin = 0;
 228         return wxPORT_BASE;
 229     }
 230
 231     virtual bool IsUsingUniversalWidgets() const { return false; }
 232     virtual wxString GetDesktopEnvironment() const { return wxEmptyString; }
 233 };
 234
 235 // ----------------------------------------------------------------------------
 236 // wxGUIAppTraitsBase: wxAppTraits implementation for the GUI apps
 237 // ----------------------------------------------------------------------------
 238
 239 #if wxUSE_GUI
 240
 241 class WXDLLIMPEXP_CORE wxGUIAppTraitsBase : public wxAppTraits
 242 {
 243 public:
 244 #if wxUSE_LOG
 245     virtual wxLog *CreateLogTarget();
 246 #endif // wxUSE_LOG
 247     virtual wxMessageOutput *CreateMessageOutput();
 248 #if wxUSE_FONTMAP
 249     virtual wxFontMapper *CreateFontMapper();
 250 #endif // wxUSE_FONTMAP
 251     virtual wxRendererNative *CreateRenderer();
 252
 253     virtual bool ShowAssertDialog(const wxString& msg);
 254     virtual bool HasStderr();
 255
 256     virtual bool IsUsingUniversalWidgets() const
 257     {
 258     #ifdef __WXUNIVERSAL__
 259         return true;
 260     #else
 261         return false;
 262     #endif
 263     }
 264
 265     virtual wxString GetDesktopEnvironment() const { return wxEmptyString; }
 266 };
 267
 268 #endif // wxUSE_GUI
 269
 270 // ----------------------------------------------------------------------------
 271 // include the platform-specific version of the classes above
 272 // ----------------------------------------------------------------------------
 273
 274 // ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port
 275 #if defined(__WIN32__)
 276     #include "wx/msw/apptrait.h"
 277 #elif defined(__OS2__)
 278     #include "wx/os2/apptrait.h"
 279 #elif defined(__UNIX__)
 280     #include "wx/unix/apptrait.h"
 281 #elif defined(__DOS__)
 282     #include "wx/msdos/apptrait.h"
 283 #else
 284     #if wxUSE_GUI
 285         class wxGUIAppTraits : public wxGUIAppTraitsBase
 286         {
 287         };
 288     #endif // wxUSE_GUI
 289     class wxConsoleAppTraits: public wxConsoleAppTraitsBase
 290     {
 291     };
 292 #endif // platform
 293
 294 #endif // _WX_APPTRAIT_H_
 295