\end{itemize}
You should use the macro IMPLEMENT\_APP(appClass) in your application implementation
-file to tell wxWindows how to create an instance of your application class.
+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.
\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxApp::wxApp}
+
+\membersection{wxApp::wxApp}\label{wxappctor}
\func{void}{wxApp}{\void}
Constructor. Called implicitly with a definition of a wxApp object.
-\membersection{wxApp::\destruct{wxApp}}
+\membersection{wxApp::\destruct{wxApp}}\label{wxappdtor}
\func{void}{\destruct{wxApp}}{\void}
\membersection{wxApp::Dispatch}\label{wxappdispatch}
-\func{void}{Dispatch}{\void}
+\func{virtual void}{Dispatch}{\void}
Dispatches the next event in the windowing system event queue.
going to be processed at all (for the latter one).
+\membersection{wxApp::ExitMainLoop}\label{wxappexitmainloop}
+
+\func{virtual void}{ExitMainLoop}{\void}
+
+Call this to explicitly exit the main message (event) loop.
+You should normally exit the main loop (and the application) by deleting
+the top window.
+
+
\membersection{wxApp::GetAppName}\label{wxappgetappname}
\constfunc{wxString}{GetAppName}{\void}
\wxheading{Remarks}
-wxWindows sets this to a reasonable default before
+wxWidgets sets this to a reasonable default before
calling \helpref{wxApp::OnInit}{wxapponinit}, but the application can reset it at will.
Returns the application's vendor name.
-\membersection{wxApp::ExitMainLoop}\label{wxappexitmainloop}
+\membersection{wxApp::IsActive}\label{wxappisactive}
-\func{void}{ExitMainLoop}{\void}
+\constfunc{bool}{IsActive}{\void}
-Call this to explicitly exit the main message (event) loop.
-You should normally exit the main loop (and the application) by deleting
-the top window.
+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
+\helpref{wxTopLevelWindow::RequestUserAttention}{wxtoplevelwindowrequestuserattention}
+to do it.
+
+
+\membersection{wxApp::IsMainLoopRunning}\label{wxappismainlooprunning}
+
+\func{static bool}{IsMainLoopRunning}{\void}
+
+Returns \true if the main event loop is currently running, i.e. if the
+application is inside \helpref{OnRun}{wxapponrun}.
+
+This can be useful to test whether the 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.
\membersection{wxApp::MainLoop}\label{wxappmainloop}
-\func{int}{MainLoop}{\void}
+\func{virtual int}{MainLoop}{\void}
-Called by wxWindows on creation of the application. Override this if you wish
+Called by wxWidgets on creation of the application. Override this if you wish
to provide your own (environment-dependent) main loop.
\wxheading{Return value}
\helpref{OnInitCmdLine}{wxapponinitcmdline}
+\membersection{wxApp::OnExceptionInMainLoop}\label{wxapponexceptioninmainloop}
+
+\func{virtual bool}{OnExceptionInMainLoop}{\void}
+
+This function is called if an unhandled exception occurs inside the main
+application event loop. It can return \true to ignore the exception and to
+continue running the loop or \false to exit the loop and terminate the
+program. In the latter case it can also use C++ \texttt{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
+\helpref{OnUnhandledException}{wxapponunhandledexception}.
+
+
\membersection{wxApp::OnExit}\label{wxapponexit}
-\func{int}{OnExit}{\void}
+\func{virtual int}{OnExit}{\void}
-Provide this member function for any processing which needs to be
+Override this member function for any processing which needs to be
done as the application is about to exit. OnExit is called after
destroying all application windows and controls, but before
-wxWindows cleanup.
+wxWidgets cleanup. Note that it is not called at all if
+\helpref{OnInit}{wxapponinit} 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.
\membersection{wxApp::OnFatalException}\label{wxapponfatalexception}
%%since this forwards OnIdle events to windows and also performs garbage collection for
%%windows whose destruction has been delayed.
%%
-%%wxWindows' strategy for OnIdle processing is as follows. After pending user interface events for an
-%%application have all been processed, wxWindows sends an OnIdle event to the application object. wxApp::OnIdle itself
+%%wxWidgets' strategy for OnIdle processing is as follows. After pending user interface events for an
+%%application have all been processed, wxWidgets sends an OnIdle event to the application object. wxApp::OnIdle itself
%%sends an OnIdle event to each application window, allowing windows to do idle processing such as updating
%%their appearance. If either wxApp::OnIdle or a window OnIdle function requested more time, by
-%%calling \helpref{wxIdleEvent::RequestMore}{wxidleeventrequestmore}, wxWindows will send another OnIdle
+%%calling \helpref{wxIdleEvent::RequestMore}{wxidleeventrequestmore}, wxWidgets will send another OnIdle
%%event to the application object. This will occur in a loop until either a user event is found to be
%%pending, or OnIdle requests no more time. Then all pending user events are processed until the system
%%goes idle again, when OnIdle is called, and so on.
This must be provided by the application, and will usually create the
application's main window, optionally calling
-\helpref{wxApp::SetTopWindow}{wxappsettopwindow}.
+\helpref{wxApp::SetTopWindow}{wxappsettopwindow}. You may use
+\helpref{OnExit}{wxapponexit} 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
-wxWindows you have to call the base class version in the derived class
+wxWidgets you have to call the base class version in the derived class
OnInit().
-Return true to continue processing, false to exit the application.
+Return \true to continue processing, \false to exit the application
+immediately.
\membersection{wxApp::OnInitCmdLine}\label{wxapponinitcmdline}
\helpref{wxWindow::Close}{wxwindowclose},\rtfsp
\helpref{wxCloseEvent}{wxcloseevent}\rtfsp
+
\membersection{wxApp::OnRun}\label{wxapponrun}
\func{virtual int}{OnRun}{\void}
-This virtual function is where the execution of a program written in wxWindows
+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
\helpref{ExitMainLoop}{wxappexitmainloop} has been explicitly called or because
\helpref{GetExitOnFrameDelete}{wxappgetexitonframedelete} 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.
+
+
\membersection{wxApp::OnUnhandledException}\label{wxapponunhandledexception}
\func{virtual void}{OnUnhandledException}{\void}
the exception you should override \helpref{OnRun()}{wxapponrun} and put a
try/catch clause around the call to the base class version there.
+
\membersection{wxApp::ProcessMessage}\label{wxappprocessmessage}
\func{bool}{ProcessMessage}{\param{WXMSG *}{msg}}
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 wxWindows with another class
+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 wxWindows to receive messages. For example,
+function is called to allow wxWidgets to receive messages. For example,
to allow co-existence with the Microsoft Foundation Classes, override
the PreTranslateMessage function:
\begin{verbatim}
-// Provide wxWindows message loop compatibility
+// Provide wxWidgets message loop compatibility
BOOL CTheApp::PreTranslateMessage(MSG *msg)
{
if (wxTheApp && wxTheApp->ProcessMessage((WXMSW *)msg))
\membersection{wxApp::Pending}\label{wxapppending}
-\func{bool}{Pending}{\void}
+\func{virtual bool}{Pending}{\void}
Returns true if unprocessed events are in the window system event queue.
Sends idle events to a window and its children.
-Please note that this function is internal to wxWindows and shouldn't be used
+Please note that this function is internal to wxWidgets and shouldn't be used
by user code.
\wxheading{Remarks}
Sets the name of the application. The name may be used in dialogs
(for example by the document/view framework). A default name is set by
-wxWindows.
+wxWidgets.
\wxheading{See also}
\func{void}{SetTopWindow}{\param{wxWindow* }{window}}
Sets the `top' window. You can call this from within \helpref{wxApp::OnInit}{wxapponinit} to
-let wxWindows know which is the main window. You don't have to set the top window;
+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,
-wxWindows just uses the first frame or dialog in its top-level window list, when it
+wxWidgets just uses the first frame or dialog in its top-level window list, when it
needs to use the top window.
\wxheading{Parameters}
Sets the name of application's vendor. The name will be used
in registry access. A default name is set by
-wxWindows.
+wxWidgets.
\wxheading{See also}
projects / wxWidgets.git / blobdiff