Resets scroll position on load

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

diff --git a/src/msw/evtloop.cpp b/src/msw/evtloop.cpp
index 27877fa3f2fc3b17e7622dcdda256044673a8814..54ac1c55cd8ca13371e600d1223a0e46221b9069 100644 (file)
--- a/src/msw/evtloop.cpp
+++ b/src/msw/evtloop.cpp
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "evtloop.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -49,7 +45,7 @@
 
     #include "wx/listimpl.cpp"
 
-    WX_DEFINE_LIST(wxMsgList);
+    WX_DEFINE_LIST(wxMsgList)
 #endif // wxUSE_THREADS
 
 // ----------------------------------------------------------------------------
@@ -85,6 +81,7 @@ private:
 // ============================================================================
 
 wxEventLoop *wxEventLoopBase::ms_activeLoop = NULL;
+wxWindowMSW *wxEventLoop::ms_winCritical = NULL;
 
 // ----------------------------------------------------------------------------
 // ctor/dtor
@@ -111,10 +108,24 @@ void wxEventLoop::ProcessMessage(WXMSG *msg)
     }
 }
 
+bool wxEventLoop::IsChildOfCriticalWindow(wxWindowMSW *win)
+{
+    while ( win )
+    {
+        if ( win == ms_winCritical )
+            return true;
+
+        win = win->GetParent();
+    }
+
+    return false;
+}
+
 bool wxEventLoop::PreProcessMessage(WXMSG *msg)
 {
     HWND hwnd = msg->hwnd;
-    wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
+    wxWindow * const wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
+    wxWindow *wnd;
 
     // this may happen if the event occurred in a standard modeless dialog (the
     // only example of which I know of is the find/replace dialog) - then call
@@ -132,6 +143,17 @@ bool wxEventLoop::PreProcessMessage(WXMSG *msg)
         return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
     }
 
+    if ( !AllowProcessing(wndThis) )
+    {
+        // not a child of critical window, so we eat the event but take care to
+        // stop an endless stream of WM_PAINTs which would have resulted if we
+        // didn't validate the invalidated part of the window
+        if ( msg->message == WM_PAINT )
+            ::ValidateRect(hwnd, NULL);
+
+        return true;
+    }
+
 #if wxUSE_TOOLTIPS
     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
     // popup the tooltip bubbles
@@ -154,8 +176,6 @@ bool wxEventLoop::PreProcessMessage(WXMSG *msg)
     }
 
     // try translations first: the accelerators override everything
-    wxWindow *wnd;
-
     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
     {
         if ( wnd->MSWTranslateMessage((WXMSG *)msg))
@@ -207,48 +227,74 @@ int wxEventLoop::Run()
     // should undo
     wxEventLoopActivator activate(&ms_activeLoop, this);
 
+    // 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
-    try
+    for ( ;; )
     {
-#endif
-        // this is the event loop itself
-        for ( ;; )
+        try
         {
-            #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() && (wxTheApp && wxTheApp->ProcessIdle()) )
-                ;
-
-            // 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_shouldExit )
-            {
-                while ( Pending() )
-                    Dispatch();
+#endif // wxUSE_EXCEPTIONS
 
-                break;
+            // 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() && (wxTheApp && wxTheApp->ProcessIdle()) )
+                    ;
+
+                // 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_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() )
+#if wxUSE_EXCEPTIONS
+            // exit the outer loop as well
+            break;
+        }
+        catch ( ... )
+        {
+            try
+            {
+                if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() )
+                {
+                    OnExit();
+                    break;
+                }
+                //else: continue running the event loop
+            }
+            catch ( ... )
             {
-                // we got WM_QUIT
-                break;
+                // OnException() throwed, possibly rethrowing the same
+                // exception again: very good, but we still need OnExit() to
+                // be called
+                OnExit();
+                throw;
             }
         }
-#if wxUSE_EXCEPTIONS
-    }
-    catch ( ... )
-    {
-        // we need OnExit() to be called before the event loop stops
-        OnExit();
-        throw;
     }
 #endif // wxUSE_EXCEPTIONS