Add files necessary to run Expat configure.

[wxWidgets.git] / interface / wx / evtloop.h

diff --git a/interface/wx/evtloop.h b/interface/wx/evtloop.h
index 659a6b964e2e8aedbd6e1e3e4a2bf3c1afafadfb..c9c6e6cb42e54e782c57612ec5c627ad97c6983f 100644 (file)
--- a/interface/wx/evtloop.h
+++ b/interface/wx/evtloop.h
@@ -4,7 +4,7 @@
 // Author:      Vadim Zeitlin
 // Copyright:   (C) 2008 Vadim Zeitlin
 // RCS-ID:      $Id$
 // Author:      Vadim Zeitlin
 // Copyright:   (C) 2008 Vadim Zeitlin
 // RCS-ID:      $Id$

-// Licence:     wxWindows license
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /**
 /////////////////////////////////////////////////////////////////////////////
 
 /**


@@ -12,8 +12,29 @@
 
     Base class for all event loop implementations.
 
 
     Base class for all event loop implementations.
 

+    An event loop is a class which queries the queue of native events sent
+    to the wxWidgets application and dispatches them to the appropriate
+    wxEvtHandlers.
+

     An object of this class is created by wxAppTraits::CreateEventLoop() and
     used by wxApp to run the main application event loop.
     An object of this class is created by wxAppTraits::CreateEventLoop() and
     used by wxApp to run the main application event loop.

+    Temporary event loops are usually created by wxDialog::ShowModal().
+
+    You can create your own event loop if you need, provided that you restore
+    the main event loop once yours is destroyed (see wxEventLoopActivator).
+
+    Notice that there can be more than one event loop at any given moment, e.g.
+    an event handler called from the main loop can show a modal dialog, which
+    starts its own loop resulting in two nested loops, with the modal dialog
+    being the active one (its IsRunning() returns @true). And a handler for a
+    button inside the modal dialog can, of course, create another modal dialog
+    with its own event loop and so on. So in general event loops form a stack
+    and only the event loop at the top of the stack is considered to be active.
+    It is also the only loop that can be directly asked to terminate by calling
+    Exit() (which is done by wxDialog::EndModal()), an outer event loop can't
+    be stopped while an inner one is still running. It is however possible to
+    ask an outer event loop to terminate as soon as all its nested loops exit
+    and the control returns back to it by using ScheduleExit().

 
     @library{wxbase}
     @category{appmanagement}
 
     @library{wxbase}
     @category{appmanagement}


@@ -37,9 +58,16 @@ public:
         Called by wxEventLoopActivator, use an instance of this class instead
         of calling this method directly to ensure that the previously active
         event loop is restored.
         Called by wxEventLoopActivator, use an instance of this class instead
         of calling this method directly to ensure that the previously active
         event loop is restored.

+
+        Results in a call to wxAppConsole::OnEventLoopEnter.

      */
     static void SetActive(wxEventLoopBase* loop);
 
      */
     static void SetActive(wxEventLoopBase* loop);
 

+    /**
+        Returns @true if this is the main loop executed by wxApp::OnRun().
+    */
+    bool IsMain() const;
+

 
     /**
         @name Dispatch and processing
 
     /**
         @name Dispatch and processing


@@ -75,9 +103,32 @@ public:
     virtual bool IsOk() const;
 
     /**
     virtual bool IsOk() const;
 
     /**

-        Exit from the loop with the given exit code.
+        Exit the currently running loop with the given exit code.
+
+        The loop will exit, i.e. its Run() method will return, during the next
+        event loop iteration.
+
+        Notice that this method can only be used if this event loop is the
+        currently running one, i.e. its IsRunning() returns @true. If this is
+        not the case, an assert failure is triggered and nothing is done as
+        outer event loops can't be exited from immediately. Use ScheduleExit()
+        if you'd like to exit this loop even if it doesn't run currently.

      */
      */

-    virtual void Exit(int rc = 0) = 0;
+    virtual void Exit(int rc = 0);
+
+    /**
+        Schedule an exit from the loop with the given exit code.
+
+        This method is similar to Exit() but can be called even if this event
+        loop is not the currently running one -- and if it is the active loop,
+        then it works in exactly the same way as Exit().
+
+        The loop will exit as soon as the control flow returns to it, i.e.
+        after any nested loops terminate.
+
+        @since 2.9.5
+     */
+    virtual void ScheduleExit(int rc = 0) = 0;

 
     /**
         Return true if any events are available.
 
     /**
         Return true if any events are available.


@@ -131,41 +182,6 @@ public:
     //@}
 
 
     //@}
 
 

-    /**
-        @name Pending events
-    */
-    //@{
-
-    /**
-        Process all pending events; it is necessary to call this function to
-        process posted events.
-
-        This happens during each event loop iteration in GUI mode but
-        it may be also called directly.
-    */
-    virtual void ProcessPendingEvents();
-
-    /**
-        Returns @true if there are pending events on the internal pending event list.
-    */
-    bool HasPendingEvents() const;
-
-    /**
-        Temporary suspends processing of the pending events.
-
-        @see ResumeProcessingOfPendingEvents()
-    */
-    void SuspendProcessingOfPendingEvents();
-
-    /**
-        Resume processing of the pending events previously stopped because of a
-        call to SuspendProcessingOfPendingEvents().
-    */
-    void ResumeProcessingOfPendingEvents();
-
-    //@}
-
-

     /**
         @name Idle handling
     */
     /**
         @name Idle handling
     */


@@ -193,7 +209,7 @@ public:
     //@{
 
     /**
     //@{
 
     /**

-        Returns @true if called from inside Yield().
+        Returns @true if called from inside Yield() or from inside YieldFor().

     */
     virtual bool IsYielding() const;
 
     */
     virtual bool IsYielding() const;
 


@@ -261,7 +277,7 @@ protected:
         happens normally (because of Exit() call) or abnormally (because of an
         exception thrown from inside the loop).
 
         happens normally (because of Exit() call) or abnormally (because of an
         exception thrown from inside the loop).
 

-        Default version does nothing.
+        The default implementation calls wxAppConsole::OnEventLoopExit.

      */
     virtual void OnExit();
 };
      */
     virtual void OnExit();
 };


@@ -306,3 +322,20 @@ public:
      */
     ~wxEventLoopActivator();
 };
      */
     ~wxEventLoopActivator();
 };

+
+/**
+    @class wxGUIEventLoop
+
+    A generic implementation of the GUI event loop.
+    
+    @library{wxbase}
+    @category{appmanagement}
+*/
+class wxGUIEventLoop : public wxEventLoopBase
+{
+public:
+    wxGUIEventLoop();
+    virtual ~wxGUIEventLoop();
+};
+
+