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Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>
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Peter Siegmund
2025-10-31 23:37:30 +01:00
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/////////////////////////////////////////////////////////////////////////////
// Name: wx/app.h
// Purpose: wxAppBase class and macros used for declaration of wxApp
// derived class in the user code
// Author: Julian Smart
// Created: 01/02/97
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_APP_H_BASE_
#define _WX_APP_H_BASE_
// ----------------------------------------------------------------------------
// headers we have to include here
// ----------------------------------------------------------------------------
#include "wx/event.h" // for the base class
#include "wx/eventfilter.h" // (and another one)
#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
#include "wx/log.h" // for wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
class WXDLLIMPEXP_FWD_BASE wxAppConsole;
class WXDLLIMPEXP_FWD_BASE wxAppTraits;
class WXDLLIMPEXP_FWD_BASE wxCmdLineParser;
class WXDLLIMPEXP_FWD_BASE wxEventLoopBase;
class WXDLLIMPEXP_FWD_BASE wxMessageOutput;
#if wxUSE_GUI
struct WXDLLIMPEXP_FWD_CORE wxVideoMode;
class WXDLLIMPEXP_FWD_CORE wxWindow;
#endif
// this macro should be used in any main() or equivalent functions defined in wx
#define wxDISABLE_DEBUG_SUPPORT() \
wxDISABLE_ASSERTS_IN_RELEASE_BUILD(); \
wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
// ----------------------------------------------------------------------------
// 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
};
// ----------------------------------------------------------------------------
// 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 WXDLLIMPEXP_BASE wxAppConsoleBase : public wxEvtHandler,
public wxEventFilter
{
public:
// ctor and dtor
wxAppConsoleBase();
virtual ~wxAppConsoleBase();
// 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 the replacement for the normal main(): all program work should
// be done here. When OnRun() returns, the programs starts shutting down.
virtual int OnRun();
// Called before the first events are handled, called from within MainLoop()
virtual void OnLaunched();
// 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!
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();
// Allows to set a custom process exit code if a fatal error happens.
// This code is 255 by default, but can be changed if necessary, notably
// set to -1 (which still maps to 255 under most systems, but to 127 when
// using MSVC) if compatibility with the previous wx versions is important.
static void SetFatalErrorExitCode(int code) { ms_fatalErrorExitCode = code; }
static int GetFatalErrorExitCode() { return ms_fatalErrorExitCode; }
// Allows to set a custom process exit code if OnInit() returns false.
// By default, this exit code is 255, as for the fatal errors.
virtual void SetErrorExitCode(int code) { m_exitCode = code; }
int GetErrorExitCode() const { return m_exitCode; }
// 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;
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
//
// by default the display name is the same as app name or a capitalized
// version of the program if app name was not set either but it's
// usually better to set it explicitly to something nicer
wxString GetAppDisplayName() const;
void SetAppDisplayName(const wxString& name) { m_appDisplayName = 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; }
// 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
// ----------------------
// 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 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 nullptr in this case and the caller must check
// for it
static wxAppTraits *GetTraitsIfExists();
// Return some valid traits object.
//
// This method checks if we have wxTheApp and returns its traits if it does
// exist and the traits are non-null, similarly to GetTraitsIfExists(), but
// falls back to wxConsoleAppTraits to ensure that it always returns
// something valid.
static wxAppTraits& GetValidTraits();
// 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; }
// This function sets the C locale to the default locale for the current
// environment. It is advised to call this to ensure that the underlying
// toolkit uses the locale in which the numbers and monetary amounts are
// shown in the format expected by user and so on.
//
// Notice that this does _not_ change the global C++ locale, you need to do
// it explicitly if you want.
//
// Finally, notice that while this function is virtual, it is not supposed
// to be overridden outside of the library itself.
virtual void SetCLocale();
// event processing functions
// --------------------------
// Implement the inherited wxEventFilter method but just return -1 from it
// to indicate that default processing should take place.
virtual int FilterEvent(wxEvent& event) override;
// 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
// 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 main event loop has already terminated by now and the program will
// exit, if you need to really handle the exceptions you need to override
// OnExceptionInMainLoop()
virtual void OnUnhandledException();
// Call OnUnhandledException() on the current wxTheApp object if it exists.
static void CallOnUnhandledException();
// 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. If this function rethrows the exception, as it does by
// default, simply because there is no general way to handle exceptions,
// StoreCurrentException() will be called to store it because in any case
// the exception can't be allowed to escape.
virtual bool OnExceptionInMainLoop();
// This function can be overridden to store the current exception, in view
// of rethrowing it later when RethrowStoredException() is called. If the
// exception was stored, return true. If the exception can't be stored,
// i.e. if this function returns false, the program will abort after
// calling OnUnhandledException().
//
// The default implementation of this function when using C++98 compiler
// just returns false, as there is no generic way to store an arbitrary
// exception in C++98 and each application must do it on its own for the
// exceptions it uses in its overridden version. When using C++11, the
// default implementation uses std::current_exception() and returns true,
// so it's normally not necessary to override this method when using C++11.
virtual bool StoreCurrentException();
// If StoreCurrentException() is overridden, this function should be
// overridden as well to rethrow the exceptions stored by it when the
// control gets back to our code, i.e. when it's safe to do it.
//
// The default version does nothing when using C++98 and uses
// std::rethrow_exception() in C++11.
virtual void RethrowStoredException();
#else // !wxUSE_EXCEPTIONS
// For convenience, still define this to allow the code using it to avoid
// checking for wxUSE_EXCEPTIONS.
static void CallOnUnhandledException() { }
#endif // wxUSE_EXCEPTIONS/!wxUSE_EXCEPTIONS
// 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 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();
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();
// 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
// -----------------
// 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, 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);
// check that the wxBuildOptions object (constructed in the application
// itself, usually the one from wxIMPLEMENT_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; }
// returns true for GUI wxApp subclasses
virtual bool IsGUI() const { return false; }
// command line arguments (public for backwards compatibility)
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
wxCmdLineArgsArray argv;
protected:
// This function must be called at the end of wxApp ctor to indicate that
// wx part of the object is fully constructed.
void WXAppConstructed();
// 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;
// the one and only global application object
static wxAppConsole *ms_appInstance;
// create main loop from AppTraits or return nullptr if
// there is no main loop implementation
wxEventLoopBase *CreateMainLoop();
// application info (must be set from the user code)
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
// allows customizing the application behaviour, created by GetTraits()
// when first needed
wxAppTraits *m_traits = nullptr;
// the main event loop of the application (may be null if the loop hasn't
// been started yet or has already terminated)
wxEventLoopBase *m_mainLoop = nullptr;
// 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 = true;
private:
// flag set to true at the end of wxApp ctor, call WXAppConstructed() to
// set it
bool m_fullyConstructed = false;
// Exit code to use if a fatal error occurs when the application object
// doesn't exist yet or is already destroyed.
static int ms_fatalErrorExitCode;
// Exit code to use if OnInit() returns false.
int m_exitCode = ms_fatalErrorExitCode;
friend class WXDLLIMPEXP_FWD_BASE wxEvtHandler;
// the application object is a singleton anyhow, there is no sense in
// copying it
wxDECLARE_NO_COPY_CLASS(wxAppConsoleBase);
};
#if defined(__UNIX__) && !defined(__WINDOWS__)
#include "wx/unix/app.h"
#else
// this has to be a class and not a typedef as we forward declare it
class wxAppConsole : public wxAppConsoleBase { };
#endif
// ----------------------------------------------------------------------------
// 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) override;
// 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() override;
// a matching function for OnInit()
virtual int OnExit() override;
// very last clean up function
//
// Override: very rarely
virtual void CleanUp() override;
// the worker functions - usually not used directly by the user code
// -----------------------------------------------------------------
// 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
// parties
//
// it should return true if more idle events are needed, false if not
virtual bool ProcessIdle() override;
// override base class version: GUI apps always use an event loop
virtual bool UsesEventLoop() const override { return true; }
// 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 nullptr)
virtual wxWindow *GetTopWindow() const;
// convenient helper which is safe to use even if there is no wxApp at
// all, it will just return nullptr in this case
static wxWindow *GetMainTopWindow();
// 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 wxDFB.
virtual wxVideoMode GetDisplayMode() const;
// Set display mode to use. This is only used in framebuffer wxWin
// ports such as 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;
// Change the theme used by the application, return true on success.
virtual bool SetNativeTheme(const wxString& WXUNUSED(theme)) { return false; }
// Request using system appearance (which is automatic for most platforms
// but not MSW) or explicitly request dark or light appearance for this
// application.
enum class Appearance
{
System,
Light,
Dark
};
enum class AppearanceResult
{
Failure,
Ok,
CannotChange
};
virtual AppearanceResult SetAppearance(Appearance WXUNUSED(appearance))
{ return AppearanceResult::Failure; }
// command line parsing (GUI-specific)
// ------------------------------------------------------------------------
#if wxUSE_CMDLINE_PARSER
virtual bool OnCmdLineParsed(wxCmdLineParser& parser) override;
virtual void OnInitCmdLine(wxCmdLineParser& parser) override;
#endif
// miscellaneous other stuff
// ------------------------------------------------------------------------
// called by toolkit-specific code to set the app status: active (we have
// focus) or not and also the last window which had focus before we were
// deactivated
virtual void SetActive(bool isActive, wxWindow *lastFocus);
virtual bool IsGUI() const override { return true; }
// returns non-null pointer only if we have a GUI application object: this
// is only useful in the rare cases when the same code can be used in both
// console and GUI applications, but needs to use GUI-specific functions if
// the GUI is available
static wxAppBase *GetGUIInstance()
{
return ms_appInstance && ms_appInstance->IsGUI()
? static_cast<wxAppBase*>(ms_appInstance)
: nullptr;
}
protected:
// override base class method to use GUI traits
virtual wxAppTraits *CreateTraits() override;
// Helper method deleting all existing top level windows: this is used
// during the application shutdown.
void DeleteAllTLWs();
// the main top level window (may be null)
wxWindow *m_topWindow;
// if Yes, exit the main loop when the last top level window is deleted, if
// No don't do it and if Later -- only do it once we reach our OnRun()
//
// the explanation for using this strange scheme is given in appcmn.cpp
enum
{
Later = -1,
No,
Yes
} m_exitOnFrameDelete;
// true if the app wants to use the best visual on systems where
// more than one are available (Sun, SGI, XFree86 4.0 ?)
bool m_useBestVisual;
// force TrueColour just in case "best" isn't TrueColour
bool m_forceTrueColour;
// does any of our windows have focus?
bool m_isActive;
wxDECLARE_NO_COPY_CLASS(wxAppBase);
};
// ----------------------------------------------------------------------------
// now include the declaration of the real class
// ----------------------------------------------------------------------------
#if defined(__WXMSW__)
#include "wx/msw/app.h"
#elif defined(__WXDFB__)
#include "wx/dfb/app.h"
#elif defined(__WXGTK__)
#include "wx/gtk/app.h"
#elif defined(__WXX11__)
#include "wx/x11/app.h"
#elif defined(__WXMAC__)
#include "wx/osx/app.h"
#elif defined(__WXQT__)
#include "wx/qt/app.h"
#endif
#else // !GUI
// wxApp is defined in core and we cannot define another one in wxBase,
// so use the preprocessor to allow using wxApp in console programs too
#define wxApp wxAppConsole
#endif // GUI/!GUI
// ----------------------------------------------------------------------------
// the global data
// ----------------------------------------------------------------------------
// for compatibility, we define this macro to access the global application
// object of type wxApp
//
// note that instead of using of wxTheApp in application code you should
// consider using wxDECLARE_APP() after which you may call wxGetApp() which will
// return the object of the correct type (i.e. MyApp and not wxApp)
//
// the cast is safe as in GUI build we only use wxApp, not wxAppConsole, and in
// console mode it does nothing at all (but see also wxApp::GetGUIInstance())
#define wxTheApp static_cast<wxApp*>(wxApp::GetInstance())
// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------
// event loop related functions only work in GUI programs
// ------------------------------------------------------
// Force an exit from main loop
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
WXDLLIMPEXP_CORE bool wxYield();
#endif // wx_YIELD_DECLARED
// Yield to other apps/messages
WXDLLIMPEXP_BASE void wxWakeUpIdle();
// ----------------------------------------------------------------------------
// macros for dynamic creation of the application object
// ----------------------------------------------------------------------------
// Having a global instance of this class allows wxApp to be aware of the app
// creator function. wxApp can then call this function to create a new app
// object. Convoluted, but necessary.
class WXDLLIMPEXP_BASE wxAppInitializer
{
public:
wxAppInitializer(wxAppInitializerFunction fn)
{ wxApp::SetInitializerFunction(fn); }
};
// the code below defines a wxIMPLEMENT_WXWIN_MAIN macro which you can use if
// your compiler really, really wants main() to be in your main program (e.g.
// hello.cpp). Now wxIMPLEMENT_APP should add this code if required.
// For compilers that support it, prefer to use wmain() and let the CRT parse
// the command line for us, for the others parse it ourselves under Windows to
// ensure that wxWidgets console applications accept arbitrary Unicode strings
// as command line parameters and not just those representable in the current
// locale (under Unix UTF-8, capable of representing any Unicode string, is
// almost always used and there is no way to retrieve the Unicode command line
// anyhow).
#if defined(__WINDOWS__)
#ifdef __VISUALC__
#define wxIMPLEMENT_WXWIN_MAIN_CONSOLE \
int wmain(int argc, wchar_t **argv) \
{ \
wxDISABLE_DEBUG_SUPPORT(); \
\
return wxEntry(argc, argv); \
}
#else // No wmain(), use main() but don't trust its arguments.
#define wxIMPLEMENT_WXWIN_MAIN_CONSOLE \
int main(int, char **) \
{ \
wxDISABLE_DEBUG_SUPPORT(); \
\
return wxEntry(); \
}
#endif
#else // Use standard main()
#define wxIMPLEMENT_WXWIN_MAIN_CONSOLE \
int main(int argc, char **argv) \
{ \
wxDISABLE_DEBUG_SUPPORT(); \
\
return wxEntry(argc, argv); \
}
#endif
// port-specific header could have defined it already in some special way
#ifndef wxIMPLEMENT_WXWIN_MAIN
#define wxIMPLEMENT_WXWIN_MAIN wxIMPLEMENT_WXWIN_MAIN_CONSOLE
#endif // defined(wxIMPLEMENT_WXWIN_MAIN)
#if defined(__WXUNIVERSAL__) && wxUSE_GUI
#include "wx/univ/theme.h"
#ifdef wxUNIV_DEFAULT_THEME
#define wxIMPLEMENT_WX_THEME_SUPPORT \
WX_USE_THEME(wxUNIV_DEFAULT_THEME);
#else
#define wxIMPLEMENT_WX_THEME_SUPPORT
#endif
#else
#define wxIMPLEMENT_WX_THEME_SUPPORT
#endif
// Use this macro if you want to define your own main() or WinMain() function
// and call wxEntry() from there.
#define wxIMPLEMENT_APP_NO_MAIN(appname) \
appname& wxGetApp() { return *static_cast<appname*>(wxApp::GetInstance()); } \
wxAppConsole *wxCreateApp() \
{ \
wxAppConsole::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, \
"your program"); \
return new appname; \
} \
wxAppInitializer \
wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp)
// Same as wxIMPLEMENT_APP() normally but doesn't include themes support in
// wxUniversal builds
#define wxIMPLEMENT_APP_NO_THEMES(appname) \
wxIMPLEMENT_WXWIN_MAIN \
wxIMPLEMENT_APP_NO_MAIN(appname)
// Use this macro exactly once, the argument is the name of the wxApp-derived
// class which is the class of your application.
#define wxIMPLEMENT_APP(appname) \
wxIMPLEMENT_WX_THEME_SUPPORT \
wxIMPLEMENT_APP_NO_THEMES(appname)
// Same as wxIMPLEMENT_APP(), but for console applications.
#define wxIMPLEMENT_APP_CONSOLE(appname) \
wxIMPLEMENT_WXWIN_MAIN_CONSOLE \
wxIMPLEMENT_APP_NO_MAIN(appname)
// this macro can be used multiple times and just allows you to use wxGetApp()
// function
#define wxDECLARE_APP(appname) \
extern appname& wxGetApp()
// declare the stuff defined by wxIMPLEMENT_APP() macro, it's not really needed
// anywhere else but at the very least it suppresses icc warnings about
// defining extern symbols without prior declaration, and it shouldn't do any
// harm
extern wxAppConsole *wxCreateApp();
extern wxAppInitializer wxTheAppInitializer;
// ----------------------------------------------------------------------------
// Compatibility macro aliases
// ----------------------------------------------------------------------------
// deprecated variants _not_ requiring a semicolon after them
// (note that also some wx-prefixed macro do _not_ require a semicolon because
// it's not always possible to force the compiler to require it)
#define IMPLEMENT_WXWIN_MAIN_CONSOLE wxIMPLEMENT_WXWIN_MAIN_CONSOLE
#define IMPLEMENT_WXWIN_MAIN wxIMPLEMENT_WXWIN_MAIN
#define IMPLEMENT_WX_THEME_SUPPORT wxIMPLEMENT_WX_THEME_SUPPORT
#define IMPLEMENT_APP_NO_MAIN(app) wxIMPLEMENT_APP_NO_MAIN(app);
#define IMPLEMENT_APP_NO_THEMES(app) wxIMPLEMENT_APP_NO_THEMES(app);
#define IMPLEMENT_APP(app) wxIMPLEMENT_APP(app);
#define IMPLEMENT_APP_CONSOLE(app) wxIMPLEMENT_APP_CONSOLE(app);
#define DECLARE_APP(app) wxDECLARE_APP(app);
#endif // _WX_APP_H_BASE_