X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6163f5d8b0685c728cd657694a640f8fc29b0212..461573cc244a194f804e2bf0c8ba6a365e77c95c:/include/wx/app.h diff --git a/include/wx/app.h b/include/wx/app.h index e4fd186486..f9474bed5b 100644 --- a/include/wx/app.h +++ b/include/wx/app.h @@ -1,73 +1,600 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: app.h -// Purpose: wxApp inclusion +// Name: wx/app.h +// 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 __APPH_BASE__ -#define __APPH_BASE__ +#ifndef _WX_APP_H_BASE_ +#define _WX_APP_H_BASE_ -#ifndef __GTK__ -class WXDLLEXPORT wxApp; -typedef wxApp* (*wxAppInitializerFunction) (void); +#if defined(__GNUG__) && !defined(__APPLE__) + #pragma interface "appbase.h" #endif -#include "wx/object.h" +// ---------------------------------------------------------------------------- +// headers we have to include here +// ---------------------------------------------------------------------------- + +#include "wx/event.h" // for the base class -#ifdef __GTK__ -typedef wxObject* (*wxAppInitializerFunction) (void); // returning wxApp* won't work with gcc +#if wxUSE_GUI + #include "wx/window.h" // for wxTopLevelWindows +#endif // wxUSE_GUI + +#if WXWIN_COMPATIBILITY_2_2 + #include "wx/icon.h" #endif -#if defined(__WINDOWS__) -#include "wx/msw/app.h" -#elif defined(__MOTIF__) -#include "wx/xt/app.h" -#elif defined(__GTK__) -#include "wx/gtk/app.h" +#include "wx/build.h" + +class WXDLLEXPORT wxApp; +class WXDLLEXPORT wxCmdLineParser; +class WXDLLEXPORT wxLog; +class WXDLLEXPORT wxMessageOutput; + +// ---------------------------------------------------------------------------- +// typedefs +// ---------------------------------------------------------------------------- + +// the type of the function used to create a wxApp object on program start up +typedef wxApp* (*wxAppInitializerFunction)(); + +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- + +static const int wxPRINT_WINDOWS = 1; +static const int wxPRINT_POSTSCRIPT = 2; + +// ---------------------------------------------------------------------------- +// support for framebuffer ports +// ---------------------------------------------------------------------------- + +#if wxUSE_GUI +// VS: Fullscreen/framebuffer application needs to choose display mode prior +// to wxWindows initialization. This class holds information about display +// mode. It is used by wxApp::Set/GetDisplayMode. +class WXDLLEXPORT wxDisplayModeInfo +{ +public: + wxDisplayModeInfo() : m_ok(FALSE) {} + wxDisplayModeInfo(unsigned width, unsigned height, unsigned depth) + : m_width(width), m_height(height), m_depth(depth), m_ok(TRUE) {} + + unsigned GetWidth() const { return m_width; } + unsigned GetHeight() const { return m_height; } + unsigned GetDepth() const { return m_depth; } + bool IsOk() const { return m_ok; } + +private: + unsigned m_width, m_height, m_depth; + bool m_ok; +}; #endif +// ---------------------------------------------------------------------------- +// the common part of wxApp implementations for all platforms +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxAppBase : public wxEvtHandler +{ + DECLARE_NO_COPY_CLASS(wxAppBase) + +public: + wxAppBase(); + virtual ~wxAppBase(); + + // 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. + virtual bool OnInit(); + +#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(); +#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(); +#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; + + // 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() = 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 + // -------------------------- + + // 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 + { + 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 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; } + +#endif // wxUSE_GUI + + // 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 + virtual void OnInitCmdLine(wxCmdLineParser& parser); + + // called after successfully parsing the command line, return TRUE + // to continue and FALSE to exit + 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 + // ------------------------------------- + +#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(); +#endif // wxUSE_LOG + + // similar to CreateLogTarget() but for the global wxMessageOutput + // object + virtual wxMessageOutput *CreateMessageOutput(); + +#if wxUSE_GUI + +#if WXWIN_COMPATIBILITY_2_2 + // 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 WXUNUSED(which)) const { return wxNullIcon; } +#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. + // Get display mode that is used use. This is only used in framebuffer wxWin ports + // (such as wxMGL). + virtual wxDisplayModeInfo GetDisplayMode() const { return wxDisplayModeInfo(); } + // Set display mode to use. This is only used in framebuffer wxWin ports + // (such as wxMGL). This method should be called from wxApp:OnInitGui + virtual bool SetDisplayMode(const wxDisplayModeInfo& WXUNUSED(info)) { return TRUE; } + + // set use of best visual flag (see below) + void SetUseBestVisual( bool flag ) { m_useBestVisual = flag; } + 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; } + + // 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); +#endif // wxUSE_GUI + + // 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); + + // 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 place where the assert occured, the text of the + // assert itself and the user-specified message +#ifdef __WXDEBUG__ + 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 wxBuildOptions& buildOptions); + + // deprecated functions, please updae your code to not use them! + // ------------------------------------------------------------- + +#if WXWIN_COMPATIBILITY_2_2 + // used by obsolete wxDebugMsg only + void SetWantDebugOutput( bool flag ) { m_wantDebugOutput = flag; } + bool GetWantDebugOutput() const { return m_wantDebugOutput; } + + // TRUE if the application wants to get debug output + bool m_wantDebugOutput; +#endif // WXWIN_COMPATIBILITY_2_2 + + // 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; + +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 wxUSE_GUI + // 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 apps whats to use the best visual on systems where + // more than one are available (Sun, SGI, XFree86 4.0 ?) + bool m_useBestVisual; + + // does any of our windows has focus? + bool m_isActive; +#endif // wxUSE_GUI +}; + +// ---------------------------------------------------------------------------- +// now include the declaration of the real class +// ---------------------------------------------------------------------------- + +#if wxUSE_GUI + #if defined(__WXMSW__) + #include "wx/msw/app.h" + #elif defined(__WXMOTIF__) + #include "wx/motif/app.h" + #elif defined(__WXMGL__) + #include "wx/mgl/app.h" + #elif defined(__WXGTK__) + #include "wx/gtk/app.h" + #elif defined(__WXX11__) + #include "wx/x11/app.h" + #elif defined(__WXMAC__) + #include "wx/mac/app.h" + #elif defined(__WXPM__) + #include "wx/os2/app.h" + #endif +#else // !GUI + // can't use typedef because wxApp forward declared as a class + class WXDLLEXPORT wxApp : public wxAppBase + { + }; +#endif // GUI/!GUI + +// ---------------------------------------------------------------------------- +// the global data +// ---------------------------------------------------------------------------- + +// 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(); + +// Post a message to the given eventhandler which will be processed during the +// next event loop iteration +inline void wxPostEvent(wxEvtHandler *dest, wxEvent& event) +{ + wxCHECK_RET( dest, wxT("need an object to post event to in wxPostEvent") ); + +#if wxUSE_GUI + dest->AddPendingEvent(event); +#else + dest->ProcessEvent(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(); + +// create an object of this class on stack to initialize/cleanup thel ibrary +// automatically +class WXDLLEXPORT wxInitializer +{ +public: + // initialize the library + wxInitializer() { m_ok = wxInitialize(); } + + // has the initialization been successful? (explicit test) + bool IsOk() const { return m_ok; } + + // has the initialization been successful? (implicit test) + operator bool() const { return m_ok; } + + // dtor only does clean up if we initialized the library properly + ~wxInitializer() { if ( m_ok ) wxUninitialize(); } + +private: + bool m_ok; +}; + +#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); - } + 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. +// 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__) -#define IMPLEMENT_WXWIN_MAIN \ -extern int wxEntry( int argc, char *argv[] ); \ -int main(int argc, char *argv[]) { return wxEntry(argc, argv); } +#if !wxUSE_GUI || defined(__WXMOTIF__) || defined(__WXGTK__) || defined(__WXPM__) || defined(__WXMGL__) + #define IMPLEMENT_WXWIN_MAIN \ + extern int wxEntry( int argc, char **argv ); \ + int main(int argc, char **argv) { return wxEntry(argc, argv); } +#elif defined(__WXMAC__) && defined(__UNIX__) + // wxMac seems to have a specific wxEntry prototype + #define IMPLEMENT_WXWIN_MAIN \ + extern int wxEntry( int argc, char **argv, bool enterLoop = TRUE ); \ + int main(int argc, char **argv) { return wxEntry(argc, argv); } +#elif defined(__WXMSW__) && defined(WXUSINGDLL) + // NT defines APIENTRY, 3.x not + #if !defined(WXAPIENTRY) + #define WXAPIENTRY WXFAR wxSTDCALL + #endif + + #include + #include "wx/msw/winundef.h" + + #define IMPLEMENT_WXWIN_MAIN \ + extern "C" 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 -#define IMPLEMENT_APP(appname) \ - wxApp *wxCreateApp(void) { return new appname; } \ - wxAppInitializer wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \ - appname& wxGetApp(void) { return *(appname *)wxTheApp; } \ - IMPLEMENT_WXWIN_MAIN +#ifdef __WXUNIVERSAL__ + #include "wx/univ/theme.h" + + #define IMPLEMENT_WX_THEME_SUPPORT \ + WX_USE_THEME(win32); \ + WX_USE_THEME(gtk); +#else + #define IMPLEMENT_WX_THEME_SUPPORT +#endif + +// Use this macro if you want to define your own main() or WinMain() function +// and call wxEntry() from there. +#define IMPLEMENT_APP_NO_MAIN(appname) \ + wxApp *wxCreateApp() \ + { \ + wxApp::CheckBuildOptions(wxBuildOptions()); \ + return new appname; \ + } \ + wxAppInitializer wxTheAppInitializer((wxAppInitializerFunction) wxCreateApp); \ + appname& wxGetApp() { return *(appname *)wxTheApp; } + +// Same as IMPLEMENT_APP() normally but doesn't include themes support in +// wxUniversal builds +#define IMPLEMENT_APP_NO_THEMES(appname) \ + IMPLEMENT_APP_NO_MAIN(appname) \ + IMPLEMENT_WXWIN_MAIN -#define DECLARE_APP(appname) \ - extern appname& wxGetApp(void) ; +// 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) \ + IMPLEMENT_APP_NO_THEMES(appname) \ + IMPLEMENT_WX_THEME_SUPPORT +// this macro can be used multiple times and just allows you to use wxGetApp() +// function +#define DECLARE_APP(appname) extern appname& wxGetApp(); #endif - // __APPH_BASE__ + // _WX_APP_H_BASE_