X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9cf3d218700ccb80a6a2a2715413816c0b2a3ad2..03647350fc7cd141953c72e0284e928847d30f44:/include/wx/app.h diff --git a/include/wx/app.h b/include/wx/app.h index 5de475c2a8..87642e3ecb 100644 --- a/include/wx/app.h +++ b/include/wx/app.h @@ -19,6 +19,7 @@ #include "wx/event.h" // for the base class #include "wx/build.h" +#include "wx/cmdargs.h" // for wxCmdLineArgsArray used by wxApp::argv #include "wx/init.h" // we must declare wxEntry() #include "wx/intl.h" // for wxLayoutDirection @@ -31,6 +32,7 @@ class WXDLLIMPEXP_FWD_BASE wxMessageOutput; #if wxUSE_GUI struct WXDLLIMPEXP_FWD_CORE wxVideoMode; + class WXDLLIMPEXP_FWD_CORE wxWindow; #endif // ---------------------------------------------------------------------------- @@ -50,6 +52,15 @@ enum wxPRINT_POSTSCRIPT = 2 }; +// ---------------------------------------------------------------------------- +// global variables +// ---------------------------------------------------------------------------- + +// use of this list is strongly deprecated, use wxApp ScheduleForDestruction() +// and IsScheduledForDestruction() methods instead of this list directly, it +// is here for compatibility purposes only +extern WXDLLIMPEXP_DATA_BASE(wxList) wxPendingDelete; + // ---------------------------------------------------------------------------- // wxAppConsoleBase: wxApp for non-GUI applications // ---------------------------------------------------------------------------- @@ -81,17 +92,25 @@ public: // 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(); + // This is called by wxEventLoopBase::SetActive(): you should put the code + // which needs an active event loop here. + // Note that this function is called whenever an event loop is activated; + // you may want to use wxEventLoopBase::IsMain() to perform initialization + // specific for the app's main event loop. + virtual void OnEventLoopEnter(wxEventLoopBase* WXUNUSED(loop)) {} + // 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 called by wxEventLoopBase::OnExit() for each event loop which + // is exited. + virtual void OnEventLoopExit(wxEventLoopBase* WXUNUSED(loop)) {} + // 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! @@ -130,8 +149,10 @@ public: // so the app name could be myapp while display name could be "My App" wxString GetAppDisplayName() const { - return m_appDisplayName.empty() ? GetAppName() : m_appDisplayName; + return m_appDisplayName.empty() ? GetAppName().Capitalize() + : m_appDisplayName; } + void SetAppDisplayName(const wxString& name) { m_appDisplayName = name; } // set/get the app class name @@ -142,6 +163,19 @@ public: const wxString& GetVendorName() const { return m_vendorName; } void SetVendorName(const wxString& name) { m_vendorName = name; } + // set/get the vendor display name: the display name is shown + // in titles/reports/dialogs to the user, while the vendor name + // is used in some areas such as wxConfig, wxStandardPaths, etc + const wxString& GetVendorDisplayName() const + { + return m_vendorDisplayName.empty() ? GetVendorName() + : m_vendorDisplayName; + } + void SetVendorDisplayName(const wxString& name) + { + m_vendorDisplayName = name; + } + // cmd line parsing stuff // ---------------------- @@ -181,9 +215,25 @@ public: // 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 fa�de + // allows us to abstract the differences behind the common facade wxAppTraits *GetTraits(); + // this function provides safer access to traits object than + // wxTheApp->GetTraits() during startup or termination when the global + // application object itself may be unavailable + // + // of course, it still returns NULL in this case and the caller must check + // for it + static wxAppTraits *GetTraitsIfExists(); + + // returns the main event loop instance, i.e. the event loop which is started + // by OnRun() and which dispatches all events sent from the native toolkit + // to the application (except when new event loops are temporarily set-up). + // The returned value maybe NULL. Put initialization code which needs a + // non-NULL main event loop into OnEventLoopEnter(). + wxEventLoopBase* GetMainLoop() const + { return m_mainLoop; } + // event processing functions // -------------------------- @@ -197,7 +247,21 @@ public: // had been already processed or won't be processed at all, respectively virtual int FilterEvent(wxEvent& event); + // return true if we're running event loop, i.e. if the events can + // (already) be dispatched + static bool IsMainLoopRunning(); + #if wxUSE_EXCEPTIONS + // execute the functor to handle the given event + // + // this is a generalization of HandleEvent() below and the base class + // implementation of CallEventHandler() still calls HandleEvent() for + // compatibility for functors which are just wxEventFunctions (i.e. methods + // of wxEvtHandler) + virtual void CallEventHandler(wxEvtHandler *handler, + wxEventFunctor& functor, + wxEvent& event) const; + // call the specified handler on the given object with the given event // // this method only exists to allow catching the exceptions thrown by any @@ -212,17 +276,27 @@ public: // exit, if you need to really handle the exceptions you need to override // OnExceptionInMainLoop() virtual void OnUnhandledException(); + + // 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 - // event processing functions - // -------------------------- - // return true if we're running event loop, i.e. if the events can - // (already) be dispatched - static bool IsMainLoopRunning(); + // pending events + // -------------- + + // IMPORTANT: all these methods conceptually belong to wxEventLoopBase + // but for many reasons we need to allow queuing of events + // even when there's no event loop (e.g. in wxApp::OnInit); + // this feature is used e.g. to queue events on secondary threads + // or in wxPython to use wx.CallAfter before the GUI is initialized - // process all events in the wxPendingEvents list -- it is necessary to - // call this function to process posted events. This happens during each + // process all events in the m_handlersWithPendingEvents 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(); @@ -230,47 +304,80 @@ public: // check if there are pending events on global pending event list bool HasPendingEvents() const; - // doesn't do anything in this class, just a hook for GUI wxApp - virtual bool Yield(bool WXUNUSED(onlyIfNeeded) = false) { return true; } + // temporary suspends processing of the pending events + void SuspendProcessingOfPendingEvents(); - // make sure that idle events are sent again - virtual void WakeUpIdle(); + // resume processing of the pending events previously stopped because of a + // call to SuspendProcessingOfPendingEvents() + void ResumeProcessingOfPendingEvents(); - // execute the main GUI loop, the function returns when the loop ends - virtual int MainLoop(); + // called by ~wxEvtHandler to (eventually) remove the handler from the list of + // the handlers with pending events + void RemovePendingEventHandler(wxEvtHandler* toRemove); - // exit the main GUI loop during the next iteration (i.e. it does not - // stop the program immediately!) - virtual void ExitMainLoop(); + // adds an event handler to the list of the handlers with pending events + void AppendPendingEventHandler(wxEvtHandler* toAppend); - // returns true if there are unprocessed events in the event queue - virtual bool Pending(); + // moves the event handler from the list of the handlers with pending events + //to the list of the handlers with _delayed_ pending events + void DelayPendingEventHandler(wxEvtHandler* toDelay); + + // deletes the current pending events + void DeletePendingEvents(); + + + // delayed destruction + // ------------------- + + // If an object may have pending events for it, it shouldn't be deleted + // immediately as this would result in a crash when trying to handle these + // events: instead, it should be scheduled for destruction and really + // destroyed only after processing all pending events. + // + // Notice that this is only possible if we have a running event loop, + // otherwise the object is just deleted directly by ScheduleForDestruction() + // and IsScheduledForDestruction() always returns false. + + // schedule the object for destruction in the near future + void ScheduleForDestruction(wxObject *object); + + // return true if the object is scheduled for destruction + bool IsScheduledForDestruction(wxObject *object) const; + + + // wxEventLoop-related methods + // --------------------------- - // 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 + // all these functions are forwarded to the corresponding methods of the + // currently active event loop -- and do nothing if there is none + virtual bool Pending(); virtual bool Dispatch(); - // this virtual function is called 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 int MainLoop(); + virtual void ExitMainLoop(); + + bool Yield(bool onlyIfNeeded = false); + + virtual void WakeUpIdle(); + + // this method is called by the active event loop when there are no events + // to process + // + // by default it generates the idle events and if you override it in your + // derived class you should call the base class version to ensure that idle + // events are still sent out virtual bool ProcessIdle(); -#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 + // this virtual function is overridden in GUI wxApp to always return true + // as GUI applications always have an event loop -- but console ones may + // have it or not, so it simply returns true if already have an event loop + // running but false otherwise + virtual bool UsesEventLoop() const; + // 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) @@ -290,7 +397,6 @@ public: 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 @@ -316,15 +422,28 @@ public: // command line arguments (public for backwards compatibility) - int argc; - wxChar **argv; + int argc; + + // this object is implicitly convertible to either "char**" (traditional + // type of argv parameter of main()) or to "wchar_t **" (for compatibility + // with Unicode build in previous wx versions and because the command line + // can, in pr +#if wxUSE_UNICODE + wxCmdLineArgsArray argv; +#else + char **argv; +#endif protected: + // delete all objects in wxPendingDelete list + // + // called from ProcessPendingEvents() + void DeletePendingObjects(); + // 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; @@ -336,7 +455,8 @@ protected: wxEventLoopBase *CreateMainLoop(); // application info (must be set from the user code) - wxString m_vendorName, // vendor name (e.g. "ACME Inc") + wxString m_vendorName, // vendor name ("acme") + m_vendorDisplayName, // vendor display name (e.g. "ACME Inc") m_appName, // app name ("myapp") m_appDisplayName, // app display name ("My Application") m_className; // class name @@ -349,9 +469,32 @@ protected: // been started yet or has already terminated) wxEventLoopBase *m_mainLoop; + + // pending events management vars: + + // the array of the handlers with pending events which needs to be processed + // inside ProcessPendingEvents() + wxEvtHandlerArray m_handlersWithPendingEvents; + + // helper array used by ProcessPendingEvents() to store the event handlers + // which have pending events but of these events none can be processed right now + // (because of a call to wxEventLoop::YieldFor() which asked to selectively process + // pending events) + wxEvtHandlerArray m_handlersWithPendingDelayedEvents; + +#if wxUSE_THREADS + // this critical section protects both the lists above + wxCriticalSection m_handlersWithPendingEventsLocker; +#endif + + // flag modified by Suspend/ResumeProcessingOfPendingEvents() + bool m_bDoPendingEventProcessing; + + friend class WXDLLIMPEXP_FWD_BASE wxEvtHandler; + // the application object is a singleton anyhow, there is no sense in // copying it - DECLARE_NO_COPY_CLASS(wxAppConsoleBase) + wxDECLARE_NO_COPY_CLASS(wxAppConsoleBase); }; #if defined(__UNIX__) @@ -408,18 +551,9 @@ public: // the worker functions - usually not used directly by the user code // ----------------------------------------------------------------- - - - // 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; + // safer alternatives to Yield(), using wxWindowDisabler + virtual bool SafeYield(wxWindow *win, bool onlyIfNeeded); + virtual bool SafeYieldFor(wxWindow *win, long eventsToProcess); // this virtual function is called in the GUI mode when the application // becomes idle and normally just sends wxIdleEvent to all interested @@ -432,6 +566,9 @@ public: // Returns true if more idle time is requested. virtual bool SendIdleEvents(wxWindow* win, wxIdleEvent& event); + // override base class version: GUI apps always use an event loop + virtual bool UsesEventLoop() const { return true; } + // top level window functions // -------------------------- @@ -485,6 +622,9 @@ public: // if it's unknown virtual wxLayoutDirection GetLayoutDirection() const; + // Change the theme used by the application, return true on success. + virtual bool SetNativeTheme(const wxString& WXUNUSED(theme)) { return false; } + // command line parsing (GUI-specific) // ------------------------------------------------------------------------ @@ -510,9 +650,6 @@ public: #endif // WXWIN_COMPATIBILITY_2_6 protected: - // delete all objects in wxPendingDelete list - void DeletePendingObjects(); - // override base class method to use GUI traits virtual wxAppTraits *CreateTraits(); @@ -540,8 +677,7 @@ protected: // does any of our windows have focus? bool m_isActive; - - DECLARE_NO_COPY_CLASS(wxAppBase) + wxDECLARE_NO_COPY_CLASS(wxAppBase); }; #if WXWIN_COMPATIBILITY_2_6 @@ -569,7 +705,7 @@ protected: #elif defined(__WXX11__) #include "wx/x11/app.h" #elif defined(__WXMAC__) - #include "wx/mac/app.h" + #include "wx/osx/app.h" #elif defined(__WXCOCOA__) #include "wx/cocoa/app.h" #elif defined(__WXPM__) @@ -597,7 +733,7 @@ protected: // // the cast is safe as in GUI build we only use wxApp, not wxAppConsole, and in // console mode it does nothing at all -#define wxTheApp wx_static_cast(wxApp*, wxApp::GetInstance()) +#define wxTheApp static_cast(wxApp::GetInstance()) // ---------------------------------------------------------------------------- // global functions @@ -607,13 +743,20 @@ protected: // ------------------------------------------------------ // Force an exit from main loop -extern void WXDLLIMPEXP_BASE wxExit(); +WXDLLIMPEXP_BASE void wxExit(); + +// avoid redeclaring this function here if it had been already declared by +// wx/utils.h, this results in warnings from g++ with -Wredundant-decls +#ifndef wx_YIELD_DECLARED +#define wx_YIELD_DECLARED // Yield to other apps/messages -extern bool WXDLLIMPEXP_BASE wxYield(); +WXDLLIMPEXP_CORE bool wxYield(); + +#endif // wx_YIELD_DECLARED // Yield to other apps/messages -extern void WXDLLIMPEXP_BASE wxWakeUpIdle(); +WXDLLIMPEXP_BASE void wxWakeUpIdle(); // ---------------------------------------------------------------------------- // macros for dynamic creation of the application object @@ -667,7 +810,7 @@ public: wxAppInitializer \ wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \ DECLARE_APP(appname) \ - appname& wxGetApp() { return *wx_static_cast(appname*, wxApp::GetInstance()); } + appname& wxGetApp() { return *static_cast(wxApp::GetInstance()); } // Same as IMPLEMENT_APP() normally but doesn't include themes support in // wxUniversal builds