+// ----------------------------------------------------------------------------
+// typedefs
+// ----------------------------------------------------------------------------
+
+// the type of the function used to create a wxApp object on program start up
+typedef wxAppConsole* (*wxAppInitializerFunction)();
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+enum
+{
+ wxPRINT_WINDOWS = 1,
+ wxPRINT_POSTSCRIPT = 2
+};
+
+// ----------------------------------------------------------------------------
+// wxAppConsole: wxApp for non-GUI applications
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxAppConsole : public wxEvtHandler
+{
+public:
+ // ctor and dtor
+ wxAppConsole();
+ virtual ~wxAppConsole();
+
+
+ // the virtual functions which may/must be overridden in the derived class
+ // -----------------------------------------------------------------------
+
+ // This is the very first function called for a newly created wxApp object,
+ // it is used by the library to do the global initialization. If, for some
+ // reason, you must override it (instead of just overriding OnInit(), as
+ // usual, for app-specific initializations), do not forget to call the base
+ // class version!
+ virtual bool Initialize(int& argc, wxChar **argv);
+
+ // This gives wxCocoa a chance to call OnInit() with a memory pool in place
+ virtual bool CallOnInit() { return OnInit(); }
+
+ // Called before OnRun(), this is a good place to do initialization -- if
+ // anything fails, return false from here to prevent the program from
+ // continuing. The command line is normally parsed here, call the base
+ // class OnInit() to do it.
+ virtual bool OnInit();
+
+ // this is here only temporary hopefully (FIXME)
+ virtual bool OnInitGui() { return true; }
+
+ // This is the replacement for the normal main(): all program work should
+ // be done here. When OnRun() returns, the programs starts shutting down.
+ virtual int OnRun() = 0;
+
+ // This is only called if OnInit() returned true so it's a good place to do
+ // any cleanup matching the initializations done there.
+ virtual int OnExit();
+
+ // This is the very last function called on wxApp object before it is
+ // destroyed. If you override it (instead of overriding OnExit() as usual)
+ // do not forget to call the base class version!
+ virtual void CleanUp();
+
+ // Called when a fatal exception occurs, this function should take care not
+ // to do anything which might provoke a nested exception! It may be
+ // overridden if you wish to react somehow in non-default way (core dump
+ // under Unix, application crash under Windows) to fatal program errors,
+ // however extreme care should be taken if you don't want this function to
+ // crash.
+ virtual void OnFatalException() { }
+
+ // Called from wxExit() function, should terminate the application a.s.a.p.
+ virtual void Exit();
+
+
+ // application info: name, description, vendor
+ // -------------------------------------------
+
+ // NB: all these should be set by the application itself, there are no
+ // reasonable default except for the application name which is taken to
+ // be argv[0]
+
+ // set/get the application name
+ wxString GetAppName() const
+ {
+ return m_appName.empty() ? m_className : m_appName;
+ }
+ void SetAppName(const wxString& name) { m_appName = name; }
+
+ // set/get the app class name
+ wxString GetClassName() const { return m_className; }
+ void SetClassName(const wxString& name) { m_className = name; }
+
+ // set/get the vendor name
+ const wxString& GetVendorName() const { return m_vendorName; }
+ void SetVendorName(const wxString& name) { m_vendorName = name; }
+
+
+ // cmd line parsing stuff
+ // ----------------------
+
+ // all of these methods may be overridden in the derived class to
+ // customize the command line parsing (by default only a few standard
+ // options are handled)
+ //
+ // you also need to call wxApp::OnInit() from YourApp::OnInit() for all
+ // this to work
+
+#if wxUSE_CMDLINE_PARSER
+ // this one is called from OnInit() to add all supported options
+ // to the given parser (don't forget to call the base class version if you
+ // override it!)
+ virtual void OnInitCmdLine(wxCmdLineParser& parser);
+
+ // called after successfully parsing the command line, return true
+ // to continue and false to exit (don't forget to call the base class
+ // version if you override it!)
+ virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
+
+ // called if "--help" option was specified, return true to continue
+ // and false to exit
+ virtual bool OnCmdLineHelp(wxCmdLineParser& parser);
+
+ // called if incorrect command line options were given, return
+ // false to abort and true to continue
+ virtual bool OnCmdLineError(wxCmdLineParser& parser);
+#endif // wxUSE_CMDLINE_PARSER
+
+
+ // miscellaneous customization functions
+ // -------------------------------------
+
+ // create the app traits object to which we delegate for everything which
+ // either should be configurable by the user (then he can change the
+ // default behaviour simply by overriding CreateTraits() and returning his
+ // own traits object) or which is GUI/console dependent as then wxAppTraits
+ // allows us to abstract the differences behind the common façade
+ wxAppTraits *GetTraits();
+
+
+ // event processing functions
+ // --------------------------
+
+ // this method allows to filter all the events processed by the program, so
+ // you should try to return quickly from it to avoid slowing down the
+ // program to the crawl
+ //
+ // return value should be -1 to continue with the normal event processing,
+ // or TRUE or FALSE to stop further processing and pretend that the event
+ // had been already processed or won't be processed at all, respectively
+ virtual int FilterEvent(wxEvent& event);
+
+#if wxUSE_EXCEPTIONS
+ // call the specified handler on the given object with the given event
+ //
+ // this method only exists to allow catching the exceptions thrown by any
+ // event handler, it would lead to an extra (useless) virtual function call
+ // if the exceptions were not used, so it doesn't even exist in that case
+ virtual void HandleEvent(wxEvtHandler *handler,
+ wxEventFunction func,
+ wxEvent& event) const;
+
+ // Called when an unhandled C++ exception occurs inside OnRun(): note that
+ // the exception type is lost by now, so if you really want to handle the
+ // exception you should override OnRun() and put a try/catch around
+ // MainLoop() call there or use OnExceptionInMainLoop()
+ virtual void OnUnhandledException() { }
+#endif // wxUSE_EXCEPTIONS
+
+ // process all events in the wxPendingEvents list -- it is necessary to
+ // call this function to process posted events. This happens during each
+ // event loop iteration in GUI mode but if there is no main loop, it may be
+ // also called directly.
+ virtual void ProcessPendingEvents();
+
+ // doesn't do anything in this class, just a hook for GUI wxApp
+ virtual bool Yield(bool WXUNUSED(onlyIfNeeded) = false) { return true; }
+
+ // make sure that idle events are sent again
+ virtual void WakeUpIdle() { }
+
+ // this is just a convenience: by providing its implementation here we
+ // avoid #ifdefs in the code using it
+ static bool IsMainLoopRunning() { return false; }
+
+
+ // debugging support
+ // -----------------
+
+#ifdef __WXDEBUG__
+ // this function is called when an assert failure occurs, the base class
+ // version does the normal processing (i.e. shows the usual assert failure
+ // dialog box)
+ //
+ // the arguments are the location of the failed assert (func may be empty
+ // if the compiler doesn't support C99 __FUNCTION__), the text of the
+ // assert itself and the user-specified message
+ virtual void OnAssertFailure(const wxChar *file,
+ int line,
+ const wxChar *func,
+ const wxChar *cond,
+ const wxChar *msg);
+
+ // old version of the function without func parameter, for compatibility
+ // only, override OnAssertFailure() in the new code
+ virtual void OnAssert(const wxChar *file,
+ int line,
+ const wxChar *cond,
+ const wxChar *msg);
+#endif // __WXDEBUG__
+
+ // check that the wxBuildOptions object (constructed in the application
+ // itself, usually the one from IMPLEMENT_APP() macro) matches the build
+ // options of the library and abort if it doesn't
+ static bool CheckBuildOptions(const char *optionsSignature,
+ const char *componentName);
+
+ // implementation only from now on
+ // -------------------------------
+
+ // helpers for dynamic wxApp construction
+ static void SetInitializerFunction(wxAppInitializerFunction fn)
+ { ms_appInitFn = fn; }
+ static wxAppInitializerFunction GetInitializerFunction()
+ { return ms_appInitFn; }
+
+ // accessors for ms_appInstance field (external code might wish to modify
+ // it, this is why we provide a setter here as well, but you should really
+ // know what you're doing if you call it), wxTheApp is usually used instead
+ // of GetInstance()
+ static wxAppConsole *GetInstance() { return ms_appInstance; }
+ static void SetInstance(wxAppConsole *app) { ms_appInstance = app; }
+
+
+ // command line arguments (public for backwards compatibility)
+ int argc;
+ wxChar **argv;
+
+protected:
+ // the function which creates the traits object when GetTraits() needs it
+ // for the first time
+ virtual wxAppTraits *CreateTraits();
+
+
+ // function used for dynamic wxApp creation
+ static wxAppInitializerFunction ms_appInitFn;
+
+ // the one and only global application object
+ static wxAppConsole *ms_appInstance;
+
+
+ // application info (must be set from the user code)
+ wxString m_vendorName, // vendor name (ACME Inc)
+ m_appName, // app name
+ m_className; // class name
+
+ // the class defining the application behaviour, NULL initially and created
+ // by GetTraits() when first needed
+ wxAppTraits *m_traits;
+
+
+ // the application object is a singleton anyhow, there is no sense in
+ // copying it
+ DECLARE_NO_COPY_CLASS(wxAppConsole)
+};
+
+// ----------------------------------------------------------------------------
+// wxAppBase: the common part of wxApp implementations for all platforms
+// ----------------------------------------------------------------------------
+
+#if wxUSE_GUI
+
+class WXDLLIMPEXP_CORE wxAppBase : public wxAppConsole
+{
+public:
+ wxAppBase();
+ virtual ~wxAppBase();
+
+ // the virtual functions which may/must be overridden in the derived class
+ // -----------------------------------------------------------------------
+
+ // very first initialization function
+ //
+ // Override: very rarely
+ virtual bool Initialize(int& argc, wxChar **argv);
+
+ // a platform-dependent version of OnInit(): the code here is likely to
+ // depend on the toolkit. default version does nothing.
+ //
+ // Override: rarely.
+ virtual bool OnInitGui();
+
+ // called to start program execution - the default version just enters
+ // the main GUI loop in which events are received and processed until
+ // the last window is not deleted (if GetExitOnFrameDelete) or
+ // ExitMainLoop() is called. In console mode programs, the execution
+ // of the program really starts here
+ //
+ // Override: rarely in GUI applications, always in console ones.
+ virtual int OnRun();
+
+ // a matching function for OnInit()
+ virtual int OnExit();
+
+ // very last clean up function
+ //
+ // Override: very rarely
+ virtual void CleanUp();
+
+
+ // the worker functions - usually not used directly by the user code
+ // -----------------------------------------------------------------
+
+ // return true if we're running main loop, i.e. if the events can
+ // (already) be dispatched
+ static bool IsMainLoopRunning()
+ {
+ wxAppBase *app = wx_static_cast(wxAppBase *, GetInstance());
+ return app && app->m_mainLoop != NULL;
+ }
+
+ // execute the main GUI loop, the function returns when the loop ends
+ virtual int MainLoop();
+
+ // exit the main loop thus terminating the application
+ virtual void Exit();
+
+ // exit the main GUI loop during the next iteration (i.e. it does not
+ // stop the program immediately!)
+ virtual void ExitMainLoop();
+
+ // returns true if there are unprocessed events in the event queue
+ virtual bool Pending();
+
+ // process the first event in the event queue (blocks until an event
+ // appears if there are none currently, use Pending() if this is not
+ // wanted), returns false if the event loop should stop and true
+ // otherwise
+ virtual bool Dispatch();
+
+ // process all currently pending events right now
+ //
+ // it is an error to call Yield() recursively unless the value of
+ // onlyIfNeeded is true
+ //
+ // WARNING: this function is dangerous as it can lead to unexpected
+ // reentrancies (i.e. when called from an event handler it
+ // may result in calling the same event handler again), use
+ // with _extreme_ care or, better, don't use at all!
+ virtual bool Yield(bool onlyIfNeeded = false) = 0;
+
+ // this virtual function is called in the GUI mode when the application
+ // becomes idle and normally just sends wxIdleEvent to all interested
+ // parties
+ //
+ // it should return true if more idle events are needed, false if not
+ virtual bool ProcessIdle();
+
+ // Send idle event to window and all subwindows
+ // Returns true if more idle time is requested.
+ virtual bool SendIdleEvents(wxWindow* win, wxIdleEvent& event);
+
+
+#if wxUSE_EXCEPTIONS
+ // Function called if an uncaught exception is caught inside the main
+ // event loop: it may return true to continue running the event loop or
+ // false to stop it (in the latter case it may rethrow the exception as
+ // well)
+ virtual bool OnExceptionInMainLoop();
+#endif // wxUSE_EXCEPTIONS
+
+
+ // top level window functions
+ // --------------------------
+
+ // return true if our app has focus
+ virtual bool IsActive() const { return m_isActive; }
+
+ // set the "main" top level window
+ void SetTopWindow(wxWindow *win) { m_topWindow = win; }
+
+ // return the "main" top level window (if it hadn't been set previously
+ // with SetTopWindow(), will return just some top level window and, if
+ // there are none, will return NULL)
+ virtual wxWindow *GetTopWindow() const;
+
+ // control the exit behaviour: by default, the program will exit the
+ // main loop (and so, usually, terminate) when the last top-level
+ // program window is deleted. Beware that if you disable this behaviour
+ // (with SetExitOnFrameDelete(false)), you'll have to call
+ // ExitMainLoop() explicitly from somewhere.
+ void SetExitOnFrameDelete(bool flag)
+ { m_exitOnFrameDelete = flag ? Yes : No; }
+ bool GetExitOnFrameDelete() const
+ { return m_exitOnFrameDelete == Yes; }
+
+
+ // display mode, visual, printing mode, ...
+ // ------------------------------------------------------------------------
+
+ // Get display mode that is used use. This is only used in framebuffer
+ // wxWin ports (such as wxMGL or wxDFB).
+ virtual wxVideoMode GetDisplayMode() const;
+ // Set display mode to use. This is only used in framebuffer wxWin
+ // ports (such as wxMGL or wxDFB). This method should be called from
+ // wxApp::OnInitGui
+ virtual bool SetDisplayMode(const wxVideoMode& WXUNUSED(info)) { return true; }
+
+ // set use of best visual flag (see below)
+ void SetUseBestVisual( bool flag, bool forceTrueColour = false )
+ { m_useBestVisual = flag; m_forceTrueColour = forceTrueColour; }
+ bool GetUseBestVisual() const { return m_useBestVisual; }
+
+ // set/get printing mode: see wxPRINT_XXX constants.
+ //
+ // default behaviour is the normal one for Unix: always use PostScript
+ // printing.
+ virtual void SetPrintMode(int WXUNUSED(mode)) { }
+ int GetPrintMode() const { return wxPRINT_POSTSCRIPT; }
+
+ // Return the layout direction for the current locale or wxLayout_Default
+ // if it's unknown
+ virtual wxLayoutDirection GetLayoutDirection() const;
+
+
+ // command line parsing (GUI-specific)
+ // ------------------------------------------------------------------------
+
+#if wxUSE_CMDLINE_PARSER
+ virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
+ virtual void OnInitCmdLine(wxCmdLineParser& parser);
projects / wxWidgets.git / blobdiff