revert r73185, it should no longer be needed after r73231

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

diff --git a/src/msw/button.cpp b/src/msw/button.cpp
index e87917bd6420e870c91974721c93c80c28490916..324803e4d8f724f0e2fcaa7d0ecf36e06fafc3aa 100644 (file)
--- a/src/msw/button.cpp
+++ b/src/msw/button.cpp
@@ -62,6 +62,10 @@
 // macros
 // ----------------------------------------------------------------------------
 
+BEGIN_EVENT_TABLE(wxButton, wxButtonBase)
+    EVT_CHAR_HOOK(wxButton::OnCharHook)
+END_EVENT_TABLE()
+
 // ============================================================================
 // implementation
 // ============================================================================
@@ -188,16 +192,25 @@ wxSize wxButtonBase::GetDefaultSize()
 // ----------------------------------------------------------------------------
 
 /*
-   The comment below and all this code is probably due to not using WM_NEXTDLGCTL
-   message when changing focus (but just SetFocus() which is not enough), see
-   http://blogs.msdn.com/oldnewthing/archive/2004/08/02/205624.aspx for the
-   full explanation.
-
-   TODO: Do use WM_NEXTDLGCTL and get rid of all this code.
-
+   In normal Windows programs there is no need to handle default button
+   manually because this is taken care by the system provided you use
+   WM_NEXTDLGCTL and not just SetFocus() to switch focus betweeh the controls
+   (see http://blogs.msdn.com/oldnewthing/archive/2004/08/02/205624.aspx for
+   the full explanation why just calling SetFocus() is not enough).
+
+   However this only works if the window is a dialog, i.e. uses DefDlgProc(),
+   but not with plain windows using DefWindowProc() and we do want to have
+   default buttons inside frames as well, so we're forced to reimplement all
+   this logic ourselves. It would be great to avoid having to do this but using
+   DefDlgProc() for all the windows would almost certainly result in more
+   problems, we'd need to carefully filter messages and pass some of them to
+   DefWindowProc() and some of them to DefDlgProc() which looks dangerous (what
+   if the handling of some message changes in some Windows version?), so doing
+   this ourselves is probably a lesser evil.
+
+   Read the rest to learn everything you ever wanted to know about the default
+   buttons but were afraid to ask.
 
-   "Everything you ever wanted to know about the default buttons" or "Why do we
-   have to do all this?"
 
    In MSW the default button should be activated when the user presses Enter
    and the current control doesn't process Enter itself somehow. This is
@@ -219,14 +232,6 @@ wxSize wxButtonBase::GetDefaultSize()
    to it. When the button loses focus, it unsets the temporary default and so
    the default item will be the permanent default -- that is the default button
    if any had been set or none otherwise, which is just what we want.
-
-   NB: all this is quite complicated by now and the worst is that normally
-       it shouldn't be necessary at all as for the normal Windows programs
-       DefWindowProc() and IsDialogMessage() take care of all this
-       automatically -- however in wxWidgets programs this doesn't work for
-       nested hierarchies (i.e. a notebook inside a notebook) for unknown
-       reason and so we have to reproduce all this code ourselves. It would be
-       very nice if we could avoid doing it.
  */
 
 // set this button as the (permanently) default one in its panel
@@ -273,7 +278,7 @@ static wxTopLevelWindow *GetTLWParentIfNotBeingDeleted(wxWindow *win)
 // set this button as being currently default
 void wxButton::SetTmpDefault()
 {
-    wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
+    wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(this);
     if ( !tlw )
         return;
 
@@ -287,7 +292,7 @@ void wxButton::SetTmpDefault()
 // unset this button as currently default, it may still stay permanent default
 void wxButton::UnsetTmpDefault()
 {
-    wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
+    wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(this);
     if ( !tlw )
         return;
 
@@ -370,6 +375,25 @@ void wxButton::Command(wxCommandEvent & event)
 // event/message handlers
 // ----------------------------------------------------------------------------
 
+void wxButton::OnCharHook(wxKeyEvent& event)
+{
+    // We want to ensure that the button always processes Enter key events
+    // itself, even if it's inside some control that normally takes over them
+    // (this happens when the button is part of an in-place editor control for
+    // example).
+    if ( event.GetKeyCode() == WXK_RETURN )
+    {
+        // We should ensure that subsequent key events are still generated even
+        // if we did handle EVT_CHAR_HOOK (normally this would suppress their
+        // generation).
+        event.DoAllowNextEvent();
+    }
+    else
+    {
+        event.Skip();
+    }
+}
+
 bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 {
     bool processed = false;