fix for opening files with VC++ 8 (closes bug 994337)

[wxWidgets.git] / src / msw / evtloop.cpp

diff --git a/src/msw/evtloop.cpp b/src/msw/evtloop.cpp
index dca66aba583c6d2cdbbd0789ae69f67dfef167c8..80be76737198dd2bc4e493380afc1164ff3aeecc 100644 (file)
--- a/src/msw/evtloop.cpp
+++ b/src/msw/evtloop.cpp
@@ -6,7 +6,7 @@
 // Created:     01.06.01
 // RCS-ID:      $Id$
 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Created:     01.06.01
 // RCS-ID:      $Id$
 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// License:     wxWindows license
+// License:     wxWindows licence

 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================


@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

     #pragma implementation "evtloop.h"
 #endif
 
     #pragma implementation "evtloop.h"
 #endif
 


@@ -34,17 +34,23 @@
 #endif //WX_PRECOMP
 
 #include "wx/evtloop.h"
 #endif //WX_PRECOMP
 
 #include "wx/evtloop.h"

+

 #include "wx/tooltip.h"
 #include "wx/tooltip.h"

+#include "wx/except.h"
+#include "wx/ptr_scpd.h"

 
 #include "wx/msw/private.h"
 
 #if wxUSE_THREADS
 
 #include "wx/msw/private.h"
 
 #if wxUSE_THREADS

+    #include "wx/thread.h"
+

     // define the array of MSG strutures
     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
     // define the array of MSG strutures
     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);

-    // VS: this is a bit dirty - it duplicates same declaration in app.cpp
-    //     (and there's no WX_DEFINE_OBJARRAY for that reason - it is already
-    //     defined in app.cpp).
-#endif
+
+    #include "wx/arrimpl.cpp"
+
+    WX_DEFINE_OBJARRAY(wxMsgArray);
+#endif // wxUSE_THREADS

 
 // ----------------------------------------------------------------------------
 // wxEventLoopImpl
 
 // ----------------------------------------------------------------------------
 // wxEventLoopImpl


@@ -54,7 +60,7 @@ class WXDLLEXPORT wxEventLoopImpl
 {
 public:
     // ctor
 {
 public:
     // ctor

-    wxEventLoopImpl() { SetExitCode(0); }
+    wxEventLoopImpl() { m_exitcode = 0; m_shouldExit = false; }

 
     // process a message
     void ProcessMessage(MSG *msg);
 
     // process a message
     void ProcessMessage(MSG *msg);


@@ -63,8 +69,9 @@ public:
     bool SendIdleMessage();
 
     // set/get the exit code
     bool SendIdleMessage();
 
     // set/get the exit code

-    void SetExitCode(int exitcode) { m_exitcode = exitcode; }
+    void Exit(int exitcode) { m_exitcode = exitcode; m_shouldExit = true; }

     int GetExitCode() const { return m_exitcode; }
     int GetExitCode() const { return m_exitcode; }

+    bool ShouldExit() const { return m_shouldExit; }

 
 private:
     // preprocess a message, return TRUE if processed (i.e. no further
 
 private:
     // preprocess a message, return TRUE if processed (i.e. no further


@@ -73,6 +80,39 @@ private:
 
     // the exit code of the event loop
     int m_exitcode;
 
     // the exit code of the event loop
     int m_exitcode;

+
+    // true if we were asked to terminate
+    bool m_shouldExit;
+};
+
+// ----------------------------------------------------------------------------
+// helper class
+// ----------------------------------------------------------------------------
+
+wxDEFINE_TIED_SCOPED_PTR_TYPE(wxEventLoopImpl);
+
+// this object sets the wxEventLoop given to the ctor as the currently active
+// one and unsets it in its dtor
+class wxEventLoopActivator
+{
+public:
+    wxEventLoopActivator(wxEventLoop **pActive,
+                         wxEventLoop *evtLoop)
+    {
+        m_pActive = pActive;
+        m_evtLoopOld = *pActive;
+        *pActive = evtLoop;
+    }
+
+    ~wxEventLoopActivator()
+    {
+        // restore the previously active event loop
+        *m_pActive = m_evtLoopOld;
+    }
+
+private:
+    wxEventLoop *m_evtLoopOld;
+    wxEventLoop **m_pActive;

 };
 
 // ============================================================================
 };
 
 // ============================================================================


@@ -96,13 +136,29 @@ void wxEventLoopImpl::ProcessMessage(MSG *msg)
 
 bool wxEventLoopImpl::PreProcessMessage(MSG *msg)
 {
 
 bool wxEventLoopImpl::PreProcessMessage(MSG *msg)
 {

-    HWND hWnd = msg->hwnd;
-    wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hWnd);
+    HWND hwnd = msg->hwnd;
+    wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
+
+    // this may happen if the event occured in a standard modeless dialog (the
+    // only example of which I know of is the find/replace dialog) - then call
+    // IsDialogMessage() to make TAB navigation in it work
+    if ( !wndThis )
+    {
+        // we need to find the dialog containing this control as
+        // IsDialogMessage() just eats all the messages (i.e. returns TRUE for
+        // them) if we call it for the control itself
+        while ( hwnd && ::GetWindowLong(hwnd, GWL_STYLE) & WS_CHILD )
+        {
+            hwnd = ::GetParent(hwnd);
+        }
+
+        return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
+    }

 
 #if wxUSE_TOOLTIPS
     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
     // popup the tooltip bubbles
 
 #if wxUSE_TOOLTIPS
     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
     // popup the tooltip bubbles

-    if ( wndThis && (msg->message == WM_MOUSEMOVE) )
+    if ( msg->message == WM_MOUSEMOVE )

     {
         wxToolTip *tt = wndThis->GetToolTip();
         if ( tt )
     {
         wxToolTip *tt = wndThis->GetToolTip();
         if ( tt )


@@ -112,22 +168,39 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg)
     }
 #endif // wxUSE_TOOLTIPS
 
     }
 #endif // wxUSE_TOOLTIPS
 

-    // try translations first; find the youngest window with a translation
-    // table.
+    // allow the window to prevent certain messages from being
+    // translated/processed (this is currently used by wxTextCtrl to always
+    // grab Ctrl-C/V/X, even if they are also accelerators in some parent)
+    if ( !wndThis->MSWShouldPreProcessMessage((WXMSG *)msg) )
+    {
+        return FALSE;
+    }
+
+    // try translations first: the accelerators override everything

     wxWindow *wnd;
     wxWindow *wnd;

+

     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
     {
     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
     {

-        if ( wnd->MSWTranslateMessage((WXMSG *)msg) )
+        if ( wnd->MSWTranslateMessage((WXMSG *)msg))

             return TRUE;
             return TRUE;

+
+        // stop at first top level window, i.e. don't try to process the key
+        // strokes originating in a dialog using the accelerators of the parent
+        // frame - this doesn't make much sense
+        if ( wnd->IsTopLevel() )
+            break;

     }
 
     }
 

-    // Anyone for a non-translation message? Try youngest descendants first.
-    for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
+    // now try the other hooks (kbd navigation is handled here): we start from
+    // wndThis->GetParent() because wndThis->MSWProcessMessage() was already
+    // called above
+    for ( wnd = wndThis->GetParent(); wnd; wnd = wnd->GetParent() )

     {
         if ( wnd->MSWProcessMessage((WXMSG *)msg) )
             return TRUE;
     }
 
     {
         if ( wnd->MSWProcessMessage((WXMSG *)msg) )
             return TRUE;
     }
 

+    // no special preprocessing for this message, dispatch it normally

     return FALSE;
 }
 
     return FALSE;
 }
 


@@ -137,9 +210,7 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg)
 
 bool wxEventLoopImpl::SendIdleMessage()
 {
 
 bool wxEventLoopImpl::SendIdleMessage()
 {

-    wxIdleEvent event;
-
-    return wxTheApp->ProcessEvent(event) && event.MoreRequested();
+    return wxTheApp && wxTheApp->ProcessIdle();

 }
 
 // ============================================================================
 }
 
 // ============================================================================


@@ -167,47 +238,102 @@ int wxEventLoop::Run()
     // event loops are not recursive, you need to create another loop!
     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
 
     // event loops are not recursive, you need to create another loop!
     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
 

-    m_impl = new wxEventLoopImpl;
-    
-    wxEventLoop *oldLoop = ms_activeLoop;
-    ms_activeLoop = this;
-
+    // SendIdleMessage() and Dispatch() below may throw so the code here should
+    // be exception-safe, hence we must use local objects for all actions we
+    // should undo
+    wxEventLoopActivator activate(&ms_activeLoop, this);
+    wxEventLoopImplTiedPtr impl(&m_impl, new wxEventLoopImpl);
+
+    // we must ensure that OnExit() is called even if an exception is thrown
+    // from inside Dispatch() but we must call it from Exit() in normal
+    // situations because it is supposed to be called synchronously,
+    // wxModalEventLoop depends on this (so we can't just use ON_BLOCK_EXIT or
+    // something similar here)
+#if wxUSE_EXCEPTIONS

     for ( ;; )
     {
     for ( ;; )
     {

-#if wxUSE_THREADS
-        wxMutexGuiLeaveOrEnter();
-#endif // wxUSE_THREADS
+        try
+        {
+#endif // wxUSE_EXCEPTIONS

 
 

-        // generate and process idle events for as long as we don't have
-        // anything else to do
-        while ( !Pending() && m_impl->SendIdleMessage() )
-            ;
+            // this is the event loop itself
+            for ( ;; )
+            {
+                #if wxUSE_THREADS
+                    wxMutexGuiLeaveOrEnter();
+                #endif // wxUSE_THREADS
+
+                // generate and process idle events for as long as we don't
+                // have anything else to do
+                while ( !Pending() && m_impl->SendIdleMessage() )
+                    ;
+
+                // if the "should exit" flag is set, the loop should terminate
+                // but not before processing any remaining messages so while
+                // Pending() returns true, do process them
+                if ( m_impl->ShouldExit() )
+                {
+                    while ( Pending() )
+                        Dispatch();
+
+                    break;
+                }
+
+                // a message came or no more idle processing to do, sit in
+                // Dispatch() waiting for the next message
+                if ( !Dispatch() )
+                {
+                    // we got WM_QUIT
+                    break;
+                }
+            }

 
 

-        // a message came or no more idle processing to do, sit in Dispatch()
-        // waiting for the next message
-        if ( !Dispatch() )
-        {
-            // we got WM_QUIT
+#if wxUSE_EXCEPTIONS
+            // exit the outer loop as well

             break;
         }
             break;
         }

+        catch ( ... )
+        {
+            try
+            {
+                if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() )
+                {
+                    OnExit();
+                    break;
+                }
+                //else: continue running the event loop
+            }
+            catch ( ... )
+            {
+                // OnException() throwed, possibly rethrowing the same
+                // exception again: very good, but we still need OnExit() to
+                // be called
+                OnExit();
+                throw;
+            }
+        }

     }
     }

+#endif // wxUSE_EXCEPTIONS

 
 

-    int exitcode = m_impl->GetExitCode();
-    delete m_impl;
-    m_impl = NULL;
-
-    ms_activeLoop = oldLoop;
-
-    return exitcode;
+    return m_impl->GetExitCode();

 }
 
 void wxEventLoop::Exit(int rc)
 {
     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
 
 }
 
 void wxEventLoop::Exit(int rc)
 {
     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
 

-    m_impl->SetExitCode(rc);
+    m_impl->Exit(rc);
+
+    OnExit();

 
 

-    ::PostQuitMessage(rc);
+    // all we have to do to exit from the loop is to (maybe) wake it up so that
+    // it can notice that Exit() had been called
+    //
+    // in particular, we do *not* use PostQuitMessage() here because we're not
+    // sure that WM_QUIT is going to be processed by the correct event loop: it
+    // is possible that another one is started before this one has a chance to
+    // process WM_QUIT
+    ::PostMessage(NULL, WM_NULL, 0, 0);

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------