/////////////////////////////////////////////////////////////////////////////
// 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_
projects / wxWidgets.git / blobdiff