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
// ----------------------------------------------------------------------------
// 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!
// be argv[0]
// set/get the application name
- wxString GetAppName() const
- {
- return m_appName.empty() ? m_className : m_appName;
- }
+ wxString GetAppName() const;
void SetAppName(const wxString& name) { m_appName = name; }
// set/get the application display name: the display name is the name
// shown to the user in titles, reports, etc while the app name is
// used for paths, config, and other places the user doesn't see
//
- // so the app name could be myapp while display name could be "My App"
- wxString GetAppDisplayName() const
- {
- return m_appDisplayName.empty() ? GetAppName().Capitalize()
- : m_appDisplayName;
- }
+ // by default the display name is the same as app name or a capitalized
+ // version of the program if app name was not set neither but it's
+ // usually better to set it explicitly to something nicer
+ wxString GetAppDisplayName() const;
void SetAppDisplayName(const wxString& name) { m_appDisplayName = name; }
// 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
// --------------------------
#endif // wxUSE_EXCEPTIONS
- // wxEventLoop redirections
- // ------------------------
+ // 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
- virtual void SuspendProcessingOfPendingEvents();
- virtual void ResumeProcessingOfPendingEvents();
+ // 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();
+
+ // check if there are pending events on global pending event list
bool HasPendingEvents() const;
+ // temporary suspends processing of the pending events
+ void SuspendProcessingOfPendingEvents();
+
+ // resume processing of the pending events previously stopped because of a
+ // call to SuspendProcessingOfPendingEvents()
+ void ResumeProcessingOfPendingEvents();
+
+ // called by ~wxEvtHandler to (eventually) remove the handler from the list of
+ // the handlers with pending events
+ void RemovePendingEventHandler(wxEvtHandler* toRemove);
+
+ // adds an event handler to the list of the handlers with pending events
+ void AppendPendingEventHandler(wxEvtHandler* toAppend);
+
+ // 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
+ // ---------------------------
+
+ // 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();
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();
+ // 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)
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
#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();
// 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
// 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
// --------------------------
#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();
projects / wxWidgets.git / blobdiff