X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/750b78ba359e7d30c7d3ad49d268923e986268cb..1fb4de3138151a34ea2653107c08386e3a1236bf:/include/wx/app.h diff --git a/include/wx/app.h b/include/wx/app.h index 64b479d1f0..5341e7d2b1 100644 --- a/include/wx/app.h +++ b/include/wx/app.h @@ -1,98 +1,403 @@ ///////////////////////////////////////////////////////////////////////////// // Name: app.h -// Purpose: wxApp inclusion +// Purpose: wxAppBase class and macros used for declaration of wxApp +// derived class in the user code // Author: Julian Smart // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_APP_H_BASE_ #define _WX_APP_H_BASE_ -#ifdef __WXMSW__ -class WXDLLEXPORT wxApp; -typedef wxApp* (*wxAppInitializerFunction) (void); +#ifdef __GNUG__ + #pragma interface "appbase.h" #endif -#include "wx/object.h" +// ---------------------------------------------------------------------------- +// typedefs +// ---------------------------------------------------------------------------- -#ifndef __WXMSW__ -typedef wxObject* (*wxAppInitializerFunction) (void); // returning wxApp* won't work with gcc +#ifdef __WXMSW__ + class WXDLLEXPORT wxApp; + typedef wxApp* (*wxAppInitializerFunction)(); +#else + // returning wxApp* won't work with gcc + #include "wx/object.h" + + typedef wxObject* (*wxAppInitializerFunction)(); #endif -#if defined(__WXMSW__) -#include "wx/msw/app.h" -#elif defined(__WXMOTIF__) -#include "wx/motif/app.h" -#elif defined(__WXQT__) -#include "wx/qt/app.h" -#elif defined(__WXGTK__) -#include "wx/gtk/app.h" -#elif defined(__WXMAC__) -#include "wx/mac/app.h" -#elif defined(__WXSTUBS__) -#include "wx/stubs/app.h" +// ---------------------------------------------------------------------------- +// headers we have to include here +// ---------------------------------------------------------------------------- + +#include "wx/event.h" // for the base class + +#if wxUSE_GUI + #include "wx/window.h" // for wxTopLevelWindows +#endif // wxUSE_GUI + +#if wxUSE_LOG + #include "wx/log.h" #endif -// 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. +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- -class WXDLLEXPORT wxAppInitializer +static const int wxPRINT_WINDOWS = 1; +static const int wxPRINT_POSTSCRIPT = 2; + +// ---------------------------------------------------------------------------- +// the common part of wxApp implementations for all platforms +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxAppBase : public wxEvtHandler { public: - wxAppInitializer(wxAppInitializerFunction fn) - { - wxApp::SetInitializerFunction(fn); - } + // the virtual functions which may/must be overridden in the derived class + // ----------------------------------------------------------------------- + + // called during the program initialization, returning FALSE from here + // prevents the program from continuing - it's a good place to create + // the top level program window and return TRUE. + // + // Override: always in GUI application, rarely in console ones. +#if wxUSE_GUI + virtual bool OnInit() { return FALSE; }; +#else // !GUI + virtual bool OnInit() { return TRUE; }; +#endif // wxUSE_GUI + +#if wxUSE_GUI + // 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() { return TRUE; } +#endif // wxUSE_GUI + + // 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. +#if wxUSE_GUI + virtual int OnRun() { return MainLoop(); }; +#else // !GUI + virtual int OnRun() = 0; +#endif // wxUSE_GUI + + // called after the main loop termination. This is a good place for + // cleaning up (it may be too late in dtor) and is also useful if you + // want to return some non-default exit code - this is just the return + // value of this method. + // + // Override: often. + virtual int OnExit(); + + // 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. + // + // Override: rarely. + virtual void OnFatalException() { } + + // the worker functions - usually not used directly by the user code + // ----------------------------------------------------------------- + +#if wxUSE_GUI + // execute the main GUI loop, the function returns when the loop ends + virtual int MainLoop() = 0; + + // exit the main GUI loop during the next iteration (i.e. it does not + // stop the program immediately!) + virtual void ExitMainLoop() = 0; + + // returns TRUE if the program is initialized + virtual bool Initialized() = 0; + + // returns TRUE if there are unprocessed events in the event queue + virtual bool Pending() = 0; + + // process the first event in the event queue (blocks until an event + // apperas if there are none currently) + virtual void Dispatch() = 0; +#endif // wxUSE_GUI + + // 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 + { + if ( !m_appName ) + return m_className; + else + return 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; } + +#if wxUSE_GUI + // top level window functions + // -------------------------- + + // 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) + wxWindow *GetTopWindow() const + { + if (m_topWindow) + return m_topWindow; + else if (wxTopLevelWindows.GetCount() > 0) + return wxTopLevelWindows.GetFirst()->GetData(); + else + return (wxWindow *)NULL; + } + + // 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 disabel this (with + // SetExitOnFrameDelete(FALSE)), you'll have to call ExitMainLoop() + // explicitly from somewhere. + void SetExitOnFrameDelete(bool flag) { m_exitOnFrameDelete = flag; } + bool GetExitOnFrameDelete() const { return m_exitOnFrameDelete; } + +#endif // wxUSE_GUI + + // miscellaneous customization functions + // ------------------------------------- + +#if wxUSE_LOG + // override this function to create default log target of arbitrary + // user-defined class (default implementation creates a wxLogGui + // object) - this log object is used by default by all wxLogXXX() + // functions. + virtual wxLog *CreateLogTarget() +#if wxUSE_GUI + { return new wxLogGui; } +#else // !GUI + { return new wxLogStderr; } +#endif // wxUSE_GUI +#endif // wxUSE_LOG + +#if wxUSE_GUI + // get the standard icon used by wxWin dialogs - this allows the user + // to customize the standard dialogs. The 'which' parameter is one of + // wxICON_XXX values + virtual wxIcon GetStdIcon(int which) const = 0; + + // VZ: what does this do exactly? + void SetWantDebugOutput( bool flag ) { m_wantDebugOutput = flag; } + bool GetWantDebugOutput() const { return m_wantDebugOutput; } + + // 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; } +#endif // wxUSE_GUI + + // implementation only from now on + // ------------------------------- + + // helpers for dynamic wxApp construction + static void SetInitializerFunction(wxAppInitializerFunction fn) + { m_appInitFn = fn; } + static wxAppInitializerFunction GetInitializerFunction() + { return m_appInitFn; } + + // process all events in the wxPendingEvents list + virtual void ProcessPendingEvents(); + + // access to the command line arguments + int argc; + wxChar **argv; + +//private: +protected: + // function used for dynamic wxApp creation + static wxAppInitializerFunction m_appInitFn; + + // application info (must be set from the user code) + wxString m_vendorName, // vendor name (ACME Inc) + m_appName, // app name + m_className; // class name + + // if TRUE, exit the main loop when the last top level window is deleted + bool m_exitOnFrameDelete; + + // TRUE if the application wants to get debug output + bool m_wantDebugOutput; + +#if wxUSE_GUI + // the main top level window - may be NULL + wxWindow *m_topWindow; +#endif // wxUSE_GUI }; -// Here's a macro you can use if your compiler -// really, really wants main() to be in your main program -// (e.g. hello.cpp). -// Now IMPLEMENT_APP should add this code if required. +// ---------------------------------------------------------------------------- +// now include the declaration of the real class +// ---------------------------------------------------------------------------- -#if defined(__AIX__) || defined(__HPUX__) -#define IMPLEMENT_WXWIN_MAIN \ -extern int wxEntry( int argc, char *argv[] ); \ -int main(int argc, char *argv[]) { return wxEntry(argc, argv); } +#if wxUSE_GUI + #if defined(__WXMSW__) + #include "wx/msw/app.h" + #elif defined(__WXMOTIF__) + #include "wx/motif/app.h" + #elif defined(__WXQT__) + #include "wx/qt/app.h" + #elif defined(__WXGTK__) + #include "wx/gtk/app.h" + #elif defined(__WXMAC__) + #include "wx/mac/app.h" + #elif defined(__WXPM__) + #include "wx/os2/app.h" + #elif defined(__WXSTUBS__) + #include "wx/stubs/app.h" + #endif +#else // !GUI + // can't use typedef because wxApp forward declared as a class + class WXDLLEXPORT wxApp : public wxAppBase + { + }; +#endif // GUI/!GUI -#elif defined(__WXMSW__) && defined(WXUSINGDLL) +// ---------------------------------------------------------------------------- +// the global data +// ---------------------------------------------------------------------------- -// NT defines APIENTRY, 3.x not -#if !defined(WXAPIENTRY) -# ifdef __WATCOMC__ -# define WXAPIENTRY PASCAL -# else -# define WXAPIENTRY FAR PASCAL -# endif -#endif +// the one and only application object - use of wxTheApp in application code +// is discouraged, consider using DECLARE_APP() after which you may call +// wxGetApp() which will return the object of the correct type (i.e. MyApp and +// not wxApp) +WXDLLEXPORT_DATA(extern wxApp*) wxTheApp; + +// ---------------------------------------------------------------------------- +// global functions +// ---------------------------------------------------------------------------- + +// event loop related functions only work in GUI programs +// ------------------------------------------------------ + +// Force an exit from main loop +extern void WXDLLEXPORT wxExit(); + +// Yield to other apps/messages +extern bool WXDLLEXPORT wxYield(); + +// Yield to other apps/messages +extern void WXDLLEXPORT wxWakeUpIdle(); + +#if wxUSE_GUI + +// Post a message to the given eventhandler which will be processed during the +// next event loop iteration +inline void WXDLLEXPORT wxPostEvent(wxEvtHandler *dest, wxEvent& event) +{ + wxCHECK_RET( dest, wxT("need an object to post event to in wxPostEvent") ); -#define IMPLEMENT_WXWIN_MAIN \ -int WXAPIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,\ - LPSTR m_lpCmdLine, int nCmdShow )\ -{\ - return wxEntry((WXHINSTANCE) hInstance, (WXHINSTANCE) hPrevInstance,\ - m_lpCmdLine, nCmdShow);\ + dest->AddPendingEvent(event); } +#endif // wxUSE_GUI + +// console applications may avoid using DECLARE_APP and IMPLEMENT_APP macros +// and call these functions instead at the program startup and termination +// ------------------------------------------------------------------------- + +#if !wxUSE_GUI + +// initialize the library (may be called as many times as needed, but each +// call to wxInitialize() must be matched by wxUninitialize()) +extern bool WXDLLEXPORT wxInitialize(); + +// clean up - the library can't be used any more after the last call to +// wxUninitialize() +extern void WXDLLEXPORT wxUninitialize(); + +#endif // !wxUSE_GUI + +// ---------------------------------------------------------------------------- +// 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 WXDLLEXPORT wxAppInitializer +{ +public: + wxAppInitializer(wxAppInitializerFunction fn) + { wxApp::SetInitializerFunction(fn); } +}; + +// Here's a macro you can use if your compiler really, really wants main() to +// be in your main program (e.g. hello.cpp). Now IMPLEMENT_APP should add this +// code if required. + +#if defined(__AIX__) || defined(__HPUX__) || defined( __VMS__ ) || defined(__WXPM__) + #define IMPLEMENT_WXWIN_MAIN \ + extern int wxEntry( int argc, char *argv[] ); \ + int main(int argc, char *argv[]) { return wxEntry(argc, argv); } +#elif defined(__WXMSW__) && defined(WXUSINGDLL) + // NT defines APIENTRY, 3.x not + #if !defined(WXAPIENTRY) + #ifdef __WATCOMC__ + #define WXAPIENTRY PASCAL + #else + #define WXAPIENTRY FAR PASCAL + #endif + #endif + + #define IMPLEMENT_WXWIN_MAIN \ + int WXAPIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,\ + LPSTR m_lpCmdLine, int nCmdShow )\ + {\ + return wxEntry((WXHINSTANCE) hInstance, \ + (WXHINSTANCE) hPrevInstance,\ + m_lpCmdLine, nCmdShow);\ + } + #else -#define IMPLEMENT_WXWIN_MAIN + #define IMPLEMENT_WXWIN_MAIN #endif +// use this macro exactly once, the argument is the name of the wxApp-derived +// class which is the class of your application #define IMPLEMENT_APP(appname) \ - wxApp *wxCreateApp(void) { return new appname; } \ - wxAppInitializer wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \ - appname& wxGetApp(void) { return *(appname *)wxTheApp; } \ - IMPLEMENT_WXWIN_MAIN - -#define DECLARE_APP(appname) \ - extern appname& wxGetApp(void) ; + wxApp *wxCreateApp() { return new appname; } \ + wxAppInitializer wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \ + appname& wxGetApp() { return *(appname *)wxTheApp; } \ + IMPLEMENT_WXWIN_MAIN +#define DECLARE_APP(appname) extern appname& wxGetApp(); #endif // _WX_APP_H_BASE_