/////////////////////////////////////////////////////////////////////////////
// Name: app.h
-// Purpose: documentation for wxApp class
+// Purpose: interface of wxApp
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+
/**
- @class wxApp
+ @class wxAppConsole
@wxheader{app.h}
- The @b wxApp class represents the application itself. It is used
- to:
-
- set and get application-wide properties;
- implement the windowing system message or event loop;
- initiate application processing via wxApp::OnInit;
- allow default processing of events not handled by other
- objects in the application.
+ This class is essential for writing console-only or hybrid apps without
+ having to define wxUSE_GUI=0.
- You should use the macro IMPLEMENT_APP(appClass) in your application
- implementation
- file to tell wxWidgets how to create an instance of your application class.
-
- Use DECLARE_APP(appClass) in a header file if you want the wxGetApp function
- (which returns
- a reference to your application object) to be visible to other files.
+ @todo MORE INFO
@library{wxbase}
@category{appmanagement}
- @seealso
- @ref overview_wxappoverview "wxApp overview"
+ @see @ref overview_app
*/
-class wxApp : public wxEvtHandler
+class wxAppConsole : public wxEvtHandler
{
-public:
+protected:
/**
- Constructor. Called implicitly with a definition of a wxApp object.
- */
- wxApp();
+ Creates the wxAppTraits object when GetTraits() needs it for the first time.
- /**
- Destructor. Will be called implicitly on program exit if the wxApp
- object is created on the stack.
+ @see wxAppTraits
*/
- ~wxApp();
+ virtual wxAppTraits* CreateTraits();
- /**
- Creates a wxLog class for the application to use for logging errors. The default
- implementation returns a new wxLogGui class.
-
- @see wxLog
- */
- virtual wxLog* CreateLogTarget();
+public:
/**
- Creates the wxAppTraits object when GetTraits()
- needs it for the first time.
-
- @see wxAppTraits
+ Destructor.
*/
- virtual wxAppTraits* CreateTraits();
+ virtual ~wxAppConsole();
/**
Dispatches the next event in the windowing system event queue.
+ Blocks until an event appears if there are none currently
+ (use Pending() if this is not wanted).
+
This can be used for programming event loops, e.g.
-
+
+ @code
+ while (app.Pending())
+ Dispatch();
+ @endcode
+
+ @return @false if the event loop should stop and @true otherwise.
+
@see Pending()
*/
- virtual void Dispatch();
+ virtual bool Dispatch();
/**
Call this to explicitly exit the main message (event) loop.
/**
This function is called before processing any event and allows the application
- to preempt the processing of some events. If this method returns -1 the event
- is processed normally, otherwise either @true or @false should be
- returned and the event processing stops immediately considering that the event
- had been already processed (for the former return value) or that it is not
- going to be processed at all (for the latter one).
+ to preempt the processing of some events.
+
+ If this method returns -1 the event is processed normally, otherwise either
+ @true or @false should be returned and the event processing stops immediately
+ considering that the event had been already processed (for the former return
+ value) or that it is not going to be processed at all (for the latter one).
*/
- int FilterEvent(wxEvent& event);
+ virtual int FilterEvent(wxEvent& event);
/**
- Returns the user-readable application name. The difference between this string
- and the one returned by GetAppName() is that this one
- is meant to be shown to the user and so should be used for the window titles,
- page headers and so on while the other one should be only used internally, e.g.
- for the file names or configuration file keys.
+ Returns the user-readable application name.
+
+ The difference between this string and the one returned by GetAppName() is that
+ this one is meant to be shown to the user and so should be used for the window
+ titles, page headers and so on while the other one should be only used internally,
+ e.g. for the file names or configuration file keys.
By default, returns the same string as GetAppName().
- This function is new since wxWidgets version 2.9.0
+
+ @since 2.9.0
*/
wxString GetAppDisplayName() const;
/**
Returns the application name.
-
+
@remarks wxWidgets sets this to a reasonable default before calling
OnInit(), but the application can reset it at will.
-
+
@see GetAppDisplayName()
*/
wxString GetAppName() const;
/**
Gets the class name of the application. The class name may be used in a
- platform specific
- manner to refer to the application.
-
+ platform specific manner to refer to the application.
+
@see SetClassName()
*/
wxString GetClassName() const;
- /**
- Returns @true if the application will exit when the top-level window is deleted,
- @false
- otherwise.
-
- @see SetExitOnFrameDelete(), @ref overview_wxappshutdownoverview "wxApp
- shutdown overview"
- */
- bool GetExitOnFrameDelete() const;
-
/**
Returns the one and only global application object.
- Usually @c wxTheApp is usead instead.
-
+ Usually ::wxTheApp is usead instead.
+
@see SetInstance()
*/
static wxAppConsole* GetInstance();
- /**
- Returns a pointer to the top window.
-
- @remarks If the top window hasn't been set using SetTopWindow(),
- this function will find the first top-level window
- (frame or dialog) and return that.
-
- @see SetTopWindow()
- */
- virtual wxWindow* GetTopWindow() const;
-
/**
Returns a pointer to the wxAppTraits object for the application.
If you want to customize the wxAppTraits object, you must override the
*/
wxAppTraits* GetTraits();
- /**
- Returns @true if the application will use the best visual on systems that support
- different visuals, @false otherwise.
-
- @see SetUseBestVisual()
- */
- bool GetUseBestVisual() const;
-
/**
Returns the user-readable vendor name. The difference between this string
- and the one returned by GetVendorName() is that this one
- is meant to be shown to the user and so should be used for the window titles,
- page headers and so on while the other one should be only used internally, e.g.
- for the file names or configuration file keys.
+ and the one returned by GetVendorName() is that this one is meant to be shown
+ to the user and so should be used for the window titles, page headers and so on
+ while the other one should be only used internally, e.g. for the file names or
+ configuration file keys.
+
By default, returns the same string as GetVendorName().
- This function is new since wxWidgets version 2.9.0
+
+ @since 2.9.0
*/
- wxString GetVendorDisplayName() const;
+ const wxString& GetVendorDisplayName() const;
/**
Returns the application's vendor name.
*/
- wxString GetVendorName() const;
+ const wxString& GetVendorName() const;
/**
This function simply invokes the given method @a func of the specified
event handler @a handler with the @a event as parameter. It exists solely
to allow to catch the C++ exceptions which could be thrown by all event
- handlers in the application in one place: if you want to do this, override this
- function in your wxApp-derived class and add try/catch clause(s) to it.
+ handlers in the application in one place: if you want to do this, override
+ this function in your wxApp-derived class and add try/catch clause(s) to it.
*/
- virtual void HandleEvent(wxEvtHandler handler,
+ virtual void HandleEvent(wxEvtHandler* handler,
wxEventFunction func,
wxEvent& event) const;
- /**
- Returns @true if the application is active, i.e. if one of its windows is
- currently in the foreground. If this function returns @false and you need to
- attract users attention to the application, you may use
- wxTopLevelWindow::RequestUserAttention
- to do it.
- */
- bool IsActive() const;
-
/**
Returns @true if the main event loop is currently running, i.e. if the
application is inside OnRun().
+
This can be useful to test whether events can be dispatched. For example,
if this function returns @false, non-blocking sockets cannot be used because
the events from them would never be processed.
static bool IsMainLoopRunning();
/**
- Mac specific. Called in response of an "open-application" Apple event.
+ Called in response of an "open-application" Apple event.
Override this to create a new document in your app.
+
+ @onlyfor{wxmac}
*/
- void MacNewFile();
+ virtual void MacNewFile();
/**
- Mac specific. Called in response of an "open-document" Apple event. You need to
- override this method in order to open a document file after the
- user double clicked on it or if the document file was dropped
- on either the running application or the application icon in
- Finder.
+ Called in response of an "open-document" Apple event.
+
+ You need to override this method in order to open a document file after the
+ user double clicked on it or if the document file was dropped on either the
+ running application or the application icon in Finder.
+
+ @onlyfor{wxmac}
*/
- void MacOpenFile(const wxString& fileName);
+ virtual void MacOpenFile(const wxString& fileName);
/**
- Mac specific. Called in response of a "get-url" Apple event.
+ Called in response of a "get-url" Apple event.
+
+ @onlyfor{wxmac}
*/
- void MacOpenURL(const wxString& url);
+ virtual void MacOpenURL(const wxString& url);
/**
- Mac specific. Called in response of a "print-document" Apple event.
+ Called in response of a "print-document" Apple event.
+
+ @onlyfor{wxmac}
*/
- void MacPrintFile(const wxString& fileName);
+ virtual void MacPrintFile(const wxString& fileName);
/**
- Mac specific. Called in response of a "reopen-application" Apple event.
+ Called in response of a "reopen-application" Apple event.
+
+ @onlyfor{wxmac}
*/
- void MacReopenApp();
+ virtual void MacReopenApp();
/**
Called by wxWidgets on creation of the application. Override this if you wish
to provide your own (environment-dependent) main loop.
-
- @returns Returns 0 under X, and the wParam of the WM_QUIT message under
- Windows.
+
+ @return 0 under X, and the wParam of the WM_QUIT message under Windows.
*/
virtual int MainLoop();
/**
This function is called when an assert failure occurs, i.e. the condition
- specified in wxASSERT macro evaluated to @false.
+ specified in wxASSERT() macro evaluated to @false.
+
It is only called in debug mode (when @c __WXDEBUG__ is defined) as
asserts are not left in the release code at all.
The base class version shows the default assert failure dialog box proposing to
the user to stop the program, continue or ignore all subsequent asserts.
-
+
@param file
the name of the source file where the assert occurred
@param line
@param cond
the condition of the failed assert in text form
@param msg
- the message specified as argument to
- wxASSERT_MSG or wxFAIL_MSG, will
- be @NULL if just wxASSERT or wxFAIL
- was used
+ the message specified as argument to wxASSERT_MSG or wxFAIL_MSG, will
+ be @NULL if just wxASSERT or wxFAIL was used
*/
- void OnAssertFailure(const wxChar file, int line,
- const wxChar func,
- const wxChar cond,
- const wxChar msg);
+ virtual void OnAssertFailure(const wxChar *file,
+ int line,
+ const wxChar *func,
+ const wxChar *cond,
+ const wxChar *msg);
/**
Called when command line parsing fails (i.e. an incorrect command line option
was specified by the user). The default behaviour is to show the program usage
text and abort the program.
+
Return @true to continue normal execution or @false to return
@false from OnInit() thus terminating the program.
-
+
@see OnInitCmdLine()
*/
- bool OnCmdLineError(wxCmdLineParser& parser);
+ virtual bool OnCmdLineError(wxCmdLineParser& parser);
/**
Called when the help option (@c --help) was specified on the command line.
The default behaviour is to show the program usage text and abort the program.
+
Return @true to continue normal execution or @false to return
@false from OnInit() thus terminating the program.
-
+
@see OnInitCmdLine()
*/
- bool OnCmdLineHelp(wxCmdLineParser& parser);
+ virtual bool OnCmdLineHelp(wxCmdLineParser& parser);
/**
Called after the command line had been successfully parsed. You may override
this method to test for the values of the various parameters which could be
set from the command line.
+
Don't forget to call the base class version unless you want to suppress
processing of the standard command line options.
- Return @true to continue normal execution or @false to return
- @false from OnInit() thus terminating the program.
-
+ Return @true to continue normal execution or @false to return @false from
+ OnInit() thus terminating the program.
+
@see OnInitCmdLine()
*/
- bool OnCmdLineParsed(wxCmdLineParser& parser);
+ virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
/**
This function is called if an unhandled exception occurs inside the main
continue running the loop or @false to exit the loop and terminate the
program. In the latter case it can also use C++ @c throw keyword to
rethrow the current exception.
+
The default behaviour of this function is the latter in all ports except under
Windows where a dialog is shown to the user which allows him to choose between
the different options. You may override this function in your class to do
something more appropriate.
+
Finally note that if the exception is rethrown from here, it can be caught in
OnUnhandledException().
*/
destroying all application windows and controls, but before
wxWidgets cleanup. Note that it is not called at all if
OnInit() failed.
- The return value of this function is currently ignored, return the same value
- as returned by the base class method if you override it.
+
+ The return value of this function is currently ignored, return the same
+ value as returned by the base class method if you override it.
*/
virtual int OnExit();
This function may be called if something fatal happens: an unhandled
exception under Win32 or a a fatal signal under Unix, for example. However,
this will not happen by default: you have to explicitly call
- wxHandleFatalExceptions to enable this.
+ wxHandleFatalExceptions() to enable this.
+
Generally speaking, this function should only show a message to the user and
return. You may attempt to save unsaved data but this is not guaranteed to
work and, in fact, probably won't.
-
- @see wxHandleFatalExceptions
+
+ @see wxHandleFatalExceptions()
*/
- void OnFatalException();
+ virtual void OnFatalException();
/**
This must be provided by the application, and will usually create the
- application's main window, optionally calling
- SetTopWindow(). You may use
- OnExit() to clean up anything initialized here, provided
+ application's main window, optionally calling SetTopWindow().
+
+ You may use OnExit() to clean up anything initialized here, provided
that the function returns @true.
+
Notice that if you want to to use the command line processing provided by
wxWidgets you have to call the base class version in the derived class
OnInit().
+
Return @true to continue processing, @false to exit the application
immediately.
*/
- bool OnInit();
+ virtual bool OnInit();
/**
- Called from OnInit() and may be used to initialize the
- parser with the command line options for this application. The base class
- versions adds support for a few standard options only.
+ Called from OnInit() and may be used to initialize the parser with the
+ command line options for this application. The base class versions adds
+ support for a few standard options only.
*/
- void OnInitCmdLine(wxCmdLineParser& parser);
+ virtual void OnInitCmdLine(wxCmdLineParser& parser);
/**
This virtual function is where the execution of a program written in wxWidgets
starts. The default implementation just enters the main loop and starts
- handling the events until it terminates, either because
- ExitMainLoop() has been explicitly called or because
- the last frame has been deleted and
- GetExitOnFrameDelete() flag is @true (this
- is the default).
+ handling the events until it terminates, either because ExitMainLoop() has
+ been explicitly called or because the last frame has been deleted and
+ GetExitOnFrameDelete() flag is @true (this is the default).
+
The return value of this function becomes the exit code of the program, so it
should return 0 in case of successful termination.
*/
/**
This function is called when an unhandled C++ exception occurs inside
- OnRun() (the exceptions which occur during the program
- startup and shutdown might not be caught at all). Notice that by now the main
- event loop has been terminated and the program will exit, if you want to
- prevent this from happening (i.e. continue running after catching an exception)
- you need to override OnExceptionInMainLoop().
+ OnRun() (the exceptions which occur during the program startup and shutdown
+ might not be caught at all). Notice that by now the main event loop has been
+ terminated and the program will exit, if you want to prevent this from happening
+ (i.e. continue running after catching an exception) you need to override
+ OnExceptionInMainLoop().
+
The default implementation shows information about the exception in debug build
but does nothing in the release build.
*/
/**
Returns @true if unprocessed events are in the window system event queue.
-
+
@see Dispatch()
*/
virtual bool Pending();
- /**
- Windows-only function for processing a message. This function
- is called from the main message loop, checking for windows that
- may wish to process it. The function returns @true if the message
- was processed, @false otherwise. If you use wxWidgets with another class
- library with its own message loop, you should make sure that this
- function is called to allow wxWidgets to receive messages. For example,
- to allow co-existence with the Microsoft Foundation Classes, override
- the PreTranslateMessage function:
- */
- bool ProcessMessage(WXMSG* msg);
-
- /**
- Sends idle events to a window and its children.
- Please note that this function is internal to wxWidgets and shouldn't be used
- by user code.
-
- @remarks These functions poll the top-level windows, and their children,
- for idle event processing. If @true is returned, more
- OnIdle processing is requested by one or more window.
-
- @see wxIdleEvent
- */
- bool SendIdleEvents(wxWindow* win, wxIdleEvent& event);
-
/**
Set the application name to be used in the user-visible places such as window
- titles. See GetAppDisplayName() for more about
- the differences between the display name and name.
+ titles. See GetAppDisplayName() for more about the differences between the
+ display name and name.
*/
void SetAppDisplayName(const wxString& name);
configuration file entries and other internal strings. For the user-visible
strings, such as the window titles, the application display name set by
SetAppDisplayName() is used instead.
+
By default the application name is set to the name of its executable file.
-
+
@see GetAppName()
*/
void SetAppName(const wxString& name);
/**
Sets the class name of the application. This may be used in a platform specific
manner to refer to the application.
-
+
@see GetClassName()
*/
void SetClassName(const wxString& name);
/**
- Allows the programmer to specify whether the application will exit when the
- top-level frame is deleted.
-
- @param flag
- If @true (the default), the application will exit when the top-level frame is
- deleted. If @false, the application will continue to run.
-
- @see GetExitOnFrameDelete(), @ref overview_wxappshutdownoverview "wxApp
- shutdown overview"
- */
- void SetExitOnFrameDelete(bool flag);
-
- /**
- Allows external code to modify global @c wxTheApp, but you should really
+ Allows external code to modify global ::wxTheApp, but you should really
know what you're doing if you call it.
-
+
@param app
Replacement for the global application object.
-
+
@see GetInstance()
*/
static void SetInstance(wxAppConsole* app);
/**
- Allows runtime switching of the UI environment theme. Currently implemented for
- wxGTK2-only.
- Return @true if theme was successfully changed.
-
- @param theme
- The name of the new theme or an absolute path to a gtkrc-theme-file
- */
- bool SetNativeTheme(const wxStringamp;);
-
- /**
- Sets the 'top' window. You can call this from within OnInit() to
- let wxWidgets know which is the main window. You don't have to set the top
- window;
- it is only a convenience so that (for example) certain dialogs without parents
- can use a
- specific window as the top window. If no top window is specified by the
- application,
- wxWidgets just uses the first frame or dialog in its top-level window list,
- when it
- needs to use the top window.
-
- @param window
- The new top window.
-
- @see GetTopWindow(), OnInit()
- */
- void SetTopWindow(wxWindow* window);
-
- /**
- Allows the programmer to specify whether the application will use the best
- visual
- on systems that support several visual on the same display. This is typically
- the
- case under Solaris and IRIX, where the default visual is only 8-bit whereas
- certain
- applications are supposed to run in TrueColour mode.
- If @a forceTrueColour is @true then the application will try to force
- using a TrueColour visual and abort the app if none is found.
- Note that this function has to be called in the constructor of the @c wxApp
- instance and won't have any effect when called later on.
- This function currently only has effect under GTK.
-
- @param flag
- If @true, the app will use the best visual.
- */
- void SetUseBestVisual(bool flag, bool forceTrueColour = false);
-
- /**
- Set the vendor name to be used in the user-visible places. See
- GetVendorDisplayName() for more about
- the differences between the display name and name.
+ Set the vendor name to be used in the user-visible places.
+ See GetVendorDisplayName() for more about the differences between the
+ display name and name.
*/
void SetVendorDisplayName(const wxString& name);
/**
Sets the name of application's vendor. The name will be used
- in registry access. A default name is set by
- wxWidgets.
-
+ in registry access. A default name is set by wxWidgets.
+
@see GetVendorName()
*/
void SetVendorName(const wxString& name);
/**
- Yields control to pending messages in the windowing system. This can be useful,
- for example, when a
- time-consuming process writes to a text window. Without an occasional
- yield, the text window will not be updated properly, and on systems with
- cooperative multitasking, such as Windows 3.1 other processes will not respond.
+ Yields control to pending messages in the windowing system.
+
+ This can be useful, for example, when a time-consuming process writes to a
+ text window. Without an occasional yield, the text window will not be updated
+ properly, and on systems with cooperative multitasking, such as Windows 3.1
+ other processes will not respond.
+
Caution should be exercised, however, since yielding may allow the
user to perform actions which are not compatible with the current task.
Disabling menu items or whole menus during processing can avoid unwanted
- reentrance of code: see ::wxSafeYield for a better
- function.
+ reentrance of code: see ::wxSafeYield for a better function.
+
Note that Yield() will not flush the message logs. This is intentional as
- calling Yield() is usually done to quickly update the screen and popping up a
- message box dialog may be undesirable. If you do wish to flush the log
+ calling Yield() is usually done to quickly update the screen and popping up
+ a message box dialog may be undesirable. If you do wish to flush the log
messages immediately (otherwise it will be done during the next idle loop
iteration), call wxLog::FlushActive.
+
Calling Yield() recursively is normally an error and an assert failure is
raised in debug build if such situation is detected. However if the
@a onlyIfNeeded parameter is @true, the method will just silently
return @false instead.
*/
- bool Yield(bool onlyIfNeeded = false);
+ virtual bool Yield(bool onlyIfNeeded = false);
/**
- int argc
Number of command line arguments (after environment-specific processing).
*/
-
+ int argc;
/**
- wxChar ** argv
Command line arguments (after environment-specific processing).
+
Under Windows and Linux/Unix, you should parse the command line
arguments and check for files to be opened when starting your
application. Under OS X, you need to override MacOpenFile()
since command line arguments are used differently there.
- You may use the wxCmdLineParser to
- parse command line arguments.
+
+ You may use the wxCmdLineParser to parse command line arguments.
*/
+ wxChar** argv;
};
-// ============================================================================
-// Global functions/macros
-// ============================================================================
-//@{
-/**
- For all normal, informational messages. They also appear in a message box by
- default (but it can be changed).
-*/
-void wxLogMessage(const char* formatString, ... );
-void wxVLogMessage(const char* formatString, va_list argPtr);
-//@}
-//@{
/**
- For verbose output. Normally, it is suppressed, but
- might be activated if the user wishes to know more details about the program
- progress (another, but possibly confusing name for the same function is @b
- wxLogInfo).
-*/
-void wxLogVerbose(const char* formatString, ... );
-void wxVLogVerbose(const char* formatString, va_list argPtr);
-//@}
+ @class wxApp
+ @wxheader{app.h}
-/**
- This is used in headers to create a forward declaration of the
- wxGetApp function implemented by
- wxIMPLEMENT_APP. It creates the declaration
- @c className wxGetApp(void).
- Example:
+ The wxApp class represents the application itself. It is used to:
- @code
- wxDECLARE_APP(MyApp)
- @endcode
-*/
-#define wxDECLARE_APP() /* implementation is private */
+ @li set and get application-wide properties;
+ @li implement the windowing system message or event loop;
+ @li initiate application processing via wxApp::OnInit;
+ @li allow default processing of events not handled by other
+ objects in the application.
-/**
- Exits application after calling wxApp::OnExit.
- Should only be used in an emergency: normally the top-level frame
- should be deleted (after deleting all other frames) to terminate the
- application. See wxCloseEvent and wxApp.
-*/
-void wxExit();
+ You should use the macro IMPLEMENT_APP(appClass) in your application
+ implementation file to tell wxWidgets how to create an instance of your
+ application class.
-//@{
-/**
- For warnings - they are also normally shown to the user, but don't interrupt
- the program work.
+ Use DECLARE_APP(appClass) in a header file if you want the wxGetApp function
+ (which returns a reference to your application object) to be visible to other
+ files.
+
+ @library{wxbase}
+ @category{appmanagement}
+
+ @see @ref overview_app
*/
-void wxLogWarning(const char* formatString, ... );
-void wxVLogWarning(const char* formatString, va_list argPtr);
-//@}
+class wxApp : public wxAppConsole
+{
+public:
+ /**
+ Constructor. Called implicitly with a definition of a wxApp object.
+ */
+ wxApp();
+
+ /**
+ Destructor. Will be called implicitly on program exit if the wxApp
+ object is created on the stack.
+ */
+ virtual ~wxApp();
+
+ /**
+ Returns @true if the application will exit when the top-level frame is deleted.
+
+ @see SetExitOnFrameDelete()
+ */
+ bool GetExitOnFrameDelete() const;
+ /**
+ Returns @true if the application will use the best visual on systems that support
+ different visuals, @false otherwise.
+
+ @see SetUseBestVisual()
+ */
+ bool GetUseBestVisual() const;
+
+ /**
+ Returns a pointer to the top window.
+
+ @remarks If the top window hasn't been set using SetTopWindow(),
+ this function will find the first top-level window
+ (frame or dialog) and return that.
+
+ @see SetTopWindow()
+ */
+ virtual wxWindow* GetTopWindow() const;
+
+ /**
+ Returns @true if the application is active, i.e. if one of its windows is
+ currently in the foreground.
+
+ If this function returns @false and you need to attract users attention to
+ the application, you may use wxTopLevelWindow::RequestUserAttention to do it.
+ */
+ virtual bool IsActive() const;
+
+ /**
+ Windows-only function for processing a message. This function is called
+ from the main message loop, checking for windows that may wish to process it.
+
+ The function returns @true if the message was processed, @false otherwise.
+ If you use wxWidgets with another class library with its own message loop,
+ you should make sure that this function is called to allow wxWidgets to
+ receive messages. For example, to allow co-existence with the Microsoft
+ Foundation Classes, override the PreTranslateMessage function:
+
+ @code
+ // Provide wxWidgets message loop compatibility
+ BOOL CTheApp::PreTranslateMessage(MSG *msg)
+ {
+ if (wxTheApp && wxTheApp->ProcessMessage((WXMSW *)msg))
+ return true;
+ else
+ return CWinApp::PreTranslateMessage(msg);
+ }
+ @endcode
+
+ @onlyfor{wxmsw}
+ */
+ bool ProcessMessage(WXMSG* msg);
+
+ /**
+ Sends idle events to a window and its children.
+ Please note that this function is internal to wxWidgets and shouldn't be used
+ by user code.
+
+ @remarks These functions poll the top-level windows, and their children,
+ for idle event processing. If @true is returned, more OnIdle
+ processing is requested by one or more window.
+
+ @see wxIdleEvent
+ */
+ virtual bool SendIdleEvents(wxWindow* win, wxIdleEvent& event);
+
+ /**
+ Allows the programmer to specify whether the application will exit when the
+ top-level frame is deleted.
+
+ @param flag
+ If @true (the default), the application will exit when the top-level frame
+ is deleted. If @false, the application will continue to run.
+
+ @see GetExitOnFrameDelete(), @ref overview_app_shutdown
+ */
+ void SetExitOnFrameDelete(bool flag);
+
+ /**
+ Allows external code to modify global ::wxTheApp, but you should really
+ know what you're doing if you call it.
+
+ @param app
+ Replacement for the global application object.
+
+ @see GetInstance()
+ */
+ static void SetInstance(wxAppConsole* app);
+
+ /**
+ Allows runtime switching of the UI environment theme.
+
+ Currently implemented for wxGTK2-only.
+ Return @true if theme was successfully changed.
+
+ @param theme
+ The name of the new theme or an absolute path to a gtkrc-theme-file
+ */
+ virtual bool SetNativeTheme(const wxString& theme);
+
+ /**
+ Sets the 'top' window. You can call this from within OnInit() to let wxWidgets
+ know which is the main window. You don't have to set the top window;
+ it is only a convenience so that (for example) certain dialogs without parents
+ can use a specific window as the top window. If no top window is specified by the
+ application, wxWidgets just uses the first frame or dialog in its top-level window
+ list, when it needs to use the top window.
+
+ @param window
+ The new top window.
+
+ @see GetTopWindow(), OnInit()
+ */
+ void SetTopWindow(wxWindow* window);
+
+ /**
+ Allows the programmer to specify whether the application will use the best
+ visual on systems that support several visual on the same display. This is typically
+ the case under Solaris and IRIX, where the default visual is only 8-bit whereas
+ certain applications are supposed to run in TrueColour mode.
+
+ Note that this function has to be called in the constructor of the wxApp
+ instance and won't have any effect when called later on.
+ This function currently only has effect under GTK.
+
+ @param flag
+ If @true, the app will use the best visual.
+ @param forceTrueColour
+ If @true then the application will try to force using a TrueColour
+ visual and abort the app if none is found.
+ */
+ void SetUseBestVisual(bool flag, bool forceTrueColour = false);
+};
+
+
+
+// ============================================================================
+// Global functions/macros
+// ============================================================================
+
+
+/** @ingroup group_funcmacro_rtti */
//@{
-/**
- Like wxLogError, but also
- terminates the program with the exit code 3. Using @e abort() standard
- function also terminates the program with this exit code.
-*/
-void wxLogFatalError(const char* formatString, ... );
-void wxVLogFatalError(const char* formatString,
- va_list argPtr);
-//@}
/**
- If @a doIt is @true, the fatal exceptions (also known as general protection
- faults under Windows or segmentation violations in the Unix world) will be
- caught and passed to wxApp::OnFatalException.
- By default, i.e. before this function is called, they will be handled in the
- normal way which usually just means that the application will be terminated.
- Calling wxHandleFatalExceptions() with @a doIt equal to @false will restore
- this default behaviour.
- Notice that this function is only available if
- @c wxUSE_ON_FATAL_EXCEPTION is 1 and under Windows platform this
- requires a compiler with support for SEH (structured exception handling) which
- currently means only Microsoft Visual C++ or a recent Borland C++ version.
+ This is used in headers to create a forward declaration of the wxGetApp()
+ function implemented by IMPLEMENT_APP().
+
+ It creates the declaration <tt>className& wxGetApp()</tt>.
+
+ @header{wx/app.h}
+
+ Example:
+
+ @code
+ DECLARE_APP(MyApp)
+ @endcode
*/
-bool wxHandleFatalExceptions(bool doIt = true);
+#define DECLARE_APP( className )
/**
This is used in the application class implementation file to make the
- application class known to
- wxWidgets for dynamic construction. You use this instead of
- Old form:
+ application class known to wxWidgets for dynamic construction.
- @code
- MyApp myApp;
- @endcode
+ @header{wx/app.h}
- New form:
+ Example:
@code
IMPLEMENT_APP(MyApp)
@endcode
- See also DECLARE_APP.
+ @see DECLARE_APP().
*/
-#define IMPLEMENT_APP() /* implementation is private */
+#define IMPLEMENT_APP( className )
-/**
- Returns the error code from the last system call. This function uses
- @c errno on Unix platforms and @c GetLastError under Win32.
+//@}
- @see wxSysErrorMsg, wxLogSysError
-*/
-unsigned long wxSysErrorCode();
-/**
- In a GUI application, this function posts @a event to the specified @e dest
- object using wxEvtHandler::AddPendingEvent.
- Otherwise, it dispatches @a event immediately using
- wxEvtHandler::ProcessEvent.
- See the respective documentation for details (and caveats).
-*/
-void wxPostEvent(wxEvtHandler* dest, wxEvent& event);
-//@{
/**
- The functions to use for error messages, i.e. the messages that must be shown
- to the user. The default processing is to pop up a message box to inform the
- user about it.
-*/
-void wxLogError(const char* formatString, ... );
-void wxVLogError(const char* formatString, va_list argPtr);
-//@}
+ The global pointer to the singleton wxApp object.
-//@{
-/**
- As @b wxLogDebug, trace functions only do something in debug build and
- expand to nothing in the release one. The reason for making
- it a separate function from it is that usually there are a lot of trace
- messages, so it might make sense to separate them from other debug messages.
- The trace messages also usually can be separated into different categories and
- the second and third versions of this function only log the message if the
- @a mask which it has is currently enabled in wxLog. This
- allows to selectively trace only some operations and not others by changing
- the value of the trace mask (possible during the run-time).
- For the second function (taking a string mask), the message is logged only if
- the mask has been previously enabled by the call to
- wxLog::AddTraceMask or by setting
- @ref overview_envvars "@c WXTRACE environment variable".
- The predefined string trace masks
- used by wxWidgets are:
- wxTRACE_MemAlloc: trace memory allocation (new/delete)
- wxTRACE_Messages: trace window messages/X callbacks
- wxTRACE_ResAlloc: trace GDI resource allocation
- wxTRACE_RefCount: trace various ref counting operations
- wxTRACE_OleCalls: trace OLE method calls (Win32 only)
- @b Caveats: since both the mask and the format string are strings,
- this might lead to function signature confusion in some cases:
- if you intend to call the format string only version of wxLogTrace,
- then add a %s format string parameter and then supply a second string parameter
- for that %s, the string mask version of wxLogTrace will erroneously get called instead, since you are supplying two string parameters to the function.
- In this case you'll unfortunately have to avoid having two leading
- string parameters, e.g. by adding a bogus integer (with its %d format string).
- The third version of the function only logs the message if all the bits
- corresponding to the @a mask are set in the wxLog trace mask which can be
- set by wxLog::SetTraceMask. This version is less
- flexible than the previous one because it doesn't allow defining the user
- trace masks easily - this is why it is deprecated in favour of using string
- trace masks.
- wxTraceMemAlloc: trace memory allocation (new/delete)
- wxTraceMessages: trace window messages/X callbacks
- wxTraceResAlloc: trace GDI resource allocation
- wxTraceRefCount: trace various ref counting operations
- wxTraceOleCalls: trace OLE method calls (Win32 only)
+ @see wxApp::GetInstance()
*/
-void wxLogTrace(const char* formatString, ... );
-void wxVLogTrace(const char* formatString, va_list argPtr);
-void wxLogTrace(const char* mask, const char* formatString,
- ... );
-void wxVLogTrace(const char* mask,
- const char* formatString,
- va_list argPtr);
-void wxLogTrace(wxTraceMask mask, const char* formatString,
- ... );
-void wxVLogTrace(wxTraceMask mask, const char* formatString,
- va_list argPtr);
-//@}
-
-/**
- Returns the error message corresponding to the given system error code. If
- @a errCode is 0 (default), the last error code (as returned by
- wxSysErrorCode) is used.
+wxApp *wxTheApp;
- @see wxSysErrorCode, wxLogSysError
-*/
-const wxChar* wxSysErrorMsg(unsigned long errCode = 0);
-/**
- This function is for use in console (wxBase) programs only. It must be called
- once for each previous successful call to wxInitialize.
-*/
-void wxUninitialize();
+/** @ingroup group_funcmacro_appinitterm */
//@{
-/**
- The right functions for debug output. They only do something in debug
- mode (when the preprocessor symbol __WXDEBUG__ is defined) and expand to
- nothing in release mode (otherwise).
-*/
-void wxLogDebug(const char* formatString, ... );
-void wxVLogDebug(const char* formatString, va_list argPtr);
-//@}
/**
- This function doesn't exist in wxWidgets but it is created by using
- the IMPLEMENT_APP macro. Thus, before using it
- anywhere but in the same module where this macro is used, you must make it
- available using DECLARE_APP.
+ This function doesn't exist in wxWidgets but it is created by using the
+ IMPLEMENT_APP() macro.
+
+ Thus, before using it anywhere but in the same module where this macro is
+ used, you must make it available using DECLARE_APP().
+
The advantage of using this function compared to directly using the global
- wxTheApp pointer is that the latter is of type @c wxApp * and so wouldn't
- allow you to access the functions specific to your application class but not
- present in wxApp while wxGetApp() returns the object of the right type.
+ ::wxTheApp pointer is that the latter is of type wxApp* and so wouldn't
+ allow you to access the functions specific to your application class but
+ not present in wxApp while wxGetApp() returns the object of the right type.
+
+ @header{wx/app.h}
*/
-wxAppDerivedClass wxGetApp();
+wxAppDerivedClass& wxGetApp();
-//@{
/**
- Messages logged by these functions will appear in the statusbar of the @a frame
- or of the top level application window by default (i.e. when using
- the second version of the functions).
- If the target frame doesn't have a statusbar, the message will be lost.
+ If @a doIt is @true, the fatal exceptions (also known as general protection
+ faults under Windows or segmentation violations in the Unix world) will be
+ caught and passed to wxApp::OnFatalException.
+
+ By default, i.e. before this function is called, they will be handled in
+ the normal way which usually just means that the application will be
+ terminated. Calling wxHandleFatalExceptions() with @a doIt equal to @false
+ will restore this default behaviour.
+
+ Notice that this function is only available if @c wxUSE_ON_FATAL_EXCEPTION
+ is 1 and under Windows platform this requires a compiler with support for
+ SEH (structured exception handling) which currently means only Microsoft
+ Visual C++ or a recent Borland C++ version.
+
+ @header{wx/app.h}
*/
-void wxLogStatus(wxFrame* frame, const char* formatString,
- ... );
-void wxVLogStatus(wxFrame* frame, const char* formatString,
- va_list argPtr);
-void wxLogStatus(const char* formatString, ... );
-void wxVLogStatus(const char* formatString, va_list argPtr);
-//@}
+bool wxHandleFatalExceptions(bool doIt = true);
/**
This function is used in wxBase only and only if you don't create
wxApp object at all. In this case you must call it from your
@c main() function before calling any other wxWidgets functions.
+
If the function returns @false the initialization could not be performed,
- in this case the library cannot be used and
- wxUninitialize shouldn't be called neither.
- This function may be called several times but
- wxUninitialize must be called for each successful
- call to this function.
+ in this case the library cannot be used and wxUninitialize() shouldn't be
+ called neither.
+
+ This function may be called several times but wxUninitialize() must be
+ called for each successful call to this function.
+
+ @header{wx/app.h}
*/
bool wxInitialize();
/**
- This is used in headers to create a forward declaration of the
- wxGetApp function implemented by
- IMPLEMENT_APP. It creates the declaration
- @c className wxGetApp(void).
- Example:
+ This function is for use in console (wxBase) programs only. It must be called
+ once for each previous successful call to wxInitialize().
- @code
- DECLARE_APP(MyApp)
- @endcode
+ @header{wx/app.h}
+*/
+void wxUninitialize();
+
+/**
+ This function wakes up the (internal and platform dependent) idle system,
+ i.e. it will force the system to send an idle event even if the system
+ currently @e is idle and thus would not send any idle event until after
+ some other event would get sent. This is also useful for sending events
+ between two threads and is used by the corresponding functions
+ wxPostEvent() and wxEvtHandler::AddPendingEvent().
+
+ @header{wx/app.h}
*/
-#define DECLARE_APP() /* implementation is private */
+void wxWakeUpIdle();
/**
Calls wxApp::Yield.
+
+ @deprecated
This function is kept only for backwards compatibility. Please use
the wxApp::Yield method instead in any new code.
+
+ @header{wx/app.h}
*/
bool wxYield();
-//@{
/**
- Mostly used by wxWidgets itself, but might be handy for logging errors after
- system call (API function) failure. It logs the specified message text as well
- as the last system error code (@e errno or @e ::GetLastError() depending
- on the platform) and the corresponding error message. The second form
- of this function takes the error code explicitly as the first argument.
+ This function is similar to wxYield, except that it disables the user input to
+ all program windows before calling wxYield and re-enables it again
+ afterwards. If @a win is not @NULL, this window will remain enabled,
+ allowing the implementation of some limited user interaction.
+ Returns the result of the call to ::wxYield.
- @see wxSysErrorCode, wxSysErrorMsg
+ @header{wx/app.h}
*/
-void wxLogSysError(const char* formatString, ... );
-void wxVLogSysError(const char* formatString,
- va_list argPtr);
-//@}
+bool wxSafeYield(wxWindow* win = NULL, bool onlyIfNeeded = false);
-//@{
/**
- This initializes wxWidgets in a platform-dependent way. Use this if you are not
- using the default wxWidgets entry code (e.g. main or WinMain). For example, you
- can initialize wxWidgets from an Microsoft Foundation Classes application using
- this function.
- The following overload of wxEntry is available under all platforms:
+ This function initializes wxWidgets in a platform-dependent way. Use this if you
+ are not using the default wxWidgets entry code (e.g. main or WinMain).
- (notice that under Windows CE platform, and only there, the type of
- @a pCmdLine is @c wchar_t *, otherwise it is @c char *, even in
- Unicode build).
+ For example, you can initialize wxWidgets from an Microsoft Foundation Classes
+ (MFC) application using this function.
- @remarks To clean up wxWidgets, call wxApp::OnExit followed by the static
- function wxApp::CleanUp. For example, if exiting from
- an MFC application that also uses wxWidgets:
+ @note This overload of wxEntry is available under all platforms.
+
+ @see wxEntryStart()
- @see wxEntryStart
+ @header{wx/app.h}
*/
int wxEntry(int& argc, wxChar** argv);
+
+/**
+ See wxEntry(int&,wxChar**) for more info about this function.
+
+ Notice that under Windows CE platform, and only there, the type of @a pCmdLine
+ is @c wchar_t *, otherwise it is @c char *, even in Unicode build.
+
+ @remarks To clean up wxWidgets, call wxApp::OnExit followed by the static
+ function wxApp::CleanUp. For example, if exiting from an MFC application
+ that also uses wxWidgets:
+ @code
+ int CTheApp::ExitInstance()
+ {
+ // OnExit isn't called by CleanUp so must be called explicitly.
+ wxTheApp->OnExit();
+ wxApp::CleanUp();
+
+ return CWinApp::ExitInstance();
+ }
+ @endcode
+
+ @header{wx/app.h}
+*/
int wxEntry(HINSTANCE hInstance,
HINSTANCE hPrevInstance = NULL,
char* pCmdLine = NULL,
int nCmdShow = SW_SHOWNORMAL);
+
+//@}
+
+
+
+/** @ingroup group_funcmacro_procctrl */
+//@{
+
+/**
+ Exits application after calling wxApp::OnExit.
+
+ Should only be used in an emergency: normally the top-level frame
+ should be deleted (after deleting all other frames) to terminate the
+ application. See wxCloseEvent and wxApp.
+
+ @header{wx/app.h}
+*/
+void wxExit();
+
//@}
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