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     // managing "pending delete" list: in GUI mode we can't immediately delete
 103     // some objects because there may be unprocessed events for them and so we
 104     // only do it during the next idle loop iteration while this is, of course,
 105     // unnecessary in wxBase, so we have a few functions to abstract these
 106     // operations
 107
 108     // add the object to the pending delete list in GUI, delete it immediately
 109     // in wxBase
 110     virtual void ScheduleForDestroy(wxObject *object) = 0;
 111
 112     // remove this object from the pending delete list in GUI, do nothing in
 113     // wxBase
 114     virtual void RemoveFromPendingDelete(wxObject *object) = 0;
 115
 116 #if wxUSE_SOCKETS
 117     // this function is used by wxNet library to set the default socket manager
 118     // to use: doing it like this allows us to keep all socket-related code in
 119     // wxNet instead of having to pull it in wxBase itself as we'd have to do
 120     // if we really implemented wxSocketManager here
 121     //
 122     // we don't take ownership of this pointer, it should have a lifetime
 123     // greater than that of any socket (e.g. be a pointer to a static object)
 124     static void SetDefaultSocketManager(wxSocketManager *manager)
 125     {
 126         ms_manager = manager;
 127     }
 128
 129     // return socket manager: this is usually different for console and GUI
 130     // applications (although some ports use the same implementation for both)
 131     virtual wxSocketManager *GetSocketManager() { return ms_manager; }
 132 #endif
 133
 134     // create a new, port specific, instance of the event loop used by wxApp
 135     virtual wxEventLoopBase *CreateEventLoop() = 0;
 136
 137 #if wxUSE_TIMER
 138     // return platform and toolkit dependent wxTimer implementation
 139     virtual wxTimerImpl *CreateTimerImpl(wxTimer *timer) = 0;
 140 #endif
 141
 142 #if wxUSE_THREADS
 143     virtual void MutexGuiEnter();
 144     virtual void MutexGuiLeave();
 145 #endif
 146
 147     // functions returning port-specific information
 148     // ------------------------------------------------------------------------
 149
 150     // return information about the (native) toolkit currently used and its
 151     // runtime (not compile-time) version.
 152     // returns wxPORT_BASE for console applications and one of the remaining
 153     // wxPORT_* values for GUI applications.
 154     virtual wxPortId GetToolkitVersion(int *majVer = NULL, int *minVer = NULL) const = 0;
 155
 156     // return true if the port is using wxUniversal for the GUI, false if not
 157     virtual bool IsUsingUniversalWidgets() const = 0;
 158
 159     // return the name of the Desktop Environment such as
 160     // "KDE" or "GNOME". May return an empty string.
 161     virtual wxString GetDesktopEnvironment() const = 0;
 162
 163     // returns a short string to identify the block of the standard command
 164     // line options parsed automatically by current port: if this string is
 165     // empty, there are no such options, otherwise the function also fills
 166     // passed arrays with the names and the descriptions of those options.
 167     virtual wxString GetStandardCmdLineOptions(wxArrayString& names,
 168                                                wxArrayString& desc) const
 169     {
 170         wxUnusedVar(names);
 171         wxUnusedVar(desc);
 172
 173         return wxEmptyString;
 174     }
 175
 176
 177 protected:
 178 #if wxUSE_STACKWALKER
 179     // utility function: returns the stack frame as a plain wxString
 180     virtual wxString GetAssertStackTrace();
 181 #endif
 182
 183 private:
 184     static wxSocketManager *ms_manager;
 185 };
 186
 187 // ----------------------------------------------------------------------------
 188 // include the platform-specific version of the class
 189 // ----------------------------------------------------------------------------
 190
 191 // NB:  test for __UNIX__ before __WXMAC__ as under Darwin we want to use the
 192 //      Unix code (and otherwise __UNIX__ wouldn't be defined)
 193 // ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port
 194 #if defined(__WXPALMOS__)
 195     #include "wx/palmos/apptbase.h"
 196 #elif defined(__WIN32__)
 197     #include "wx/msw/apptbase.h"
 198 #elif defined(__UNIX__) && !defined(__EMX__)
 199     #include "wx/unix/apptbase.h"
 200 #elif defined(__OS2__)
 201     #include "wx/os2/apptbase.h"
 202 #else // no platform-specific methods to add to wxAppTraits
 203     // wxAppTraits must be a class because it was forward declared as class
 204     class WXDLLIMPEXP_BASE wxAppTraits : public wxAppTraitsBase
 205     {
 206     };
 207 #endif // platform
 208
 209 // ============================================================================
 210 // standard traits for console and GUI applications
 211 // ============================================================================
 212
 213 // ----------------------------------------------------------------------------
 214 // wxConsoleAppTraitsBase: wxAppTraits implementation for the console apps
 215 // ----------------------------------------------------------------------------
 216
 217 class WXDLLIMPEXP_BASE wxConsoleAppTraitsBase : public wxAppTraits
 218 {
 219 public:
 220 #if !wxUSE_CONSOLE_EVENTLOOP
 221     virtual wxEventLoopBase *CreateEventLoop() { return NULL; }
 222 #endif // !wxUSE_CONSOLE_EVENTLOOP
 223
 224 #if wxUSE_LOG
 225     virtual wxLog *CreateLogTarget();
 226 #endif // wxUSE_LOG
 227     virtual wxMessageOutput *CreateMessageOutput();
 228 #if wxUSE_FONTMAP
 229     virtual wxFontMapper *CreateFontMapper();
 230 #endif // wxUSE_FONTMAP
 231     virtual wxRendererNative *CreateRenderer();
 232
 233     virtual bool ShowAssertDialog(const wxString& msg);
 234     virtual bool HasStderr();
 235
 236     virtual void ScheduleForDestroy(wxObject *object);
 237     virtual void RemoveFromPendingDelete(wxObject *object);
 238
 239     // the GetToolkitVersion for console application is always the same
 240     virtual wxPortId GetToolkitVersion(int *verMaj = NULL, int *verMin = NULL) const
 241     {
 242         // no toolkits (wxBase is for console applications without GUI support)
 243         // NB: zero means "no toolkit", -1 means "not initialized yet"
 244         //     so we must use zero here!
 245         if (verMaj) *verMaj = 0;
 246         if (verMin) *verMin = 0;
 247         return wxPORT_BASE;
 248     }
 249
 250     virtual bool IsUsingUniversalWidgets() const { return false; }
 251     virtual wxString GetDesktopEnvironment() const { return wxEmptyString; }
 252 };
 253
 254 // ----------------------------------------------------------------------------
 255 // wxGUIAppTraitsBase: wxAppTraits implementation for the GUI apps
 256 // ----------------------------------------------------------------------------
 257
 258 #if wxUSE_GUI
 259
 260 class WXDLLIMPEXP_CORE wxGUIAppTraitsBase : public wxAppTraits
 261 {
 262 public:
 263 #if wxUSE_LOG
 264     virtual wxLog *CreateLogTarget();
 265 #endif // wxUSE_LOG
 266     virtual wxMessageOutput *CreateMessageOutput();
 267 #if wxUSE_FONTMAP
 268     virtual wxFontMapper *CreateFontMapper();
 269 #endif // wxUSE_FONTMAP
 270     virtual wxRendererNative *CreateRenderer();
 271
 272     virtual bool ShowAssertDialog(const wxString& msg);
 273     virtual bool HasStderr();
 274
 275     virtual void ScheduleForDestroy(wxObject *object);
 276     virtual void RemoveFromPendingDelete(wxObject *object);
 277
 278     virtual bool IsUsingUniversalWidgets() const
 279     {
 280     #ifdef __WXUNIVERSAL__
 281         return true;
 282     #else
 283         return false;
 284     #endif
 285     }
 286
 287     virtual wxString GetDesktopEnvironment() const { return wxEmptyString; }
 288 };
 289
 290 #endif // wxUSE_GUI
 291
 292 // ----------------------------------------------------------------------------
 293 // include the platform-specific version of the classes above
 294 // ----------------------------------------------------------------------------
 295
 296 // ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port
 297 #if defined(__WXPALMOS__)
 298     #include "wx/palmos/apptrait.h"
 299 #elif defined(__WIN32__)
 300     #include "wx/msw/apptrait.h"
 301 #elif defined(__OS2__)
 302     #include "wx/os2/apptrait.h"
 303 #elif defined(__UNIX__)
 304     #include "wx/unix/apptrait.h"
 305 #elif defined(__DOS__)
 306     #include "wx/msdos/apptrait.h"
 307 #else
 308     #if wxUSE_GUI
 309         class wxGUIAppTraits : public wxGUIAppTraitsBase
 310         {
 311         };
 312     #endif // wxUSE_GUI
 313     class wxConsoleAppTraits: public wxConsoleAppTraitsBase
 314     {
 315     };
 316 #endif // platform
 317
 318 #endif // _WX_APPTRAIT_H_
 319