// Created: 01.06.01
// RCS-ID: $Id$
// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// License: wxWidgets licence
+// License: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// 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"
#if wxUSE_THREADS
#include "wx/thread.h"
- // define the array of MSG strutures
- WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
+ // define the list of MSG strutures
+ WX_DECLARE_LIST(MSG, wxMsgList);
- #include "wx/arrimpl.cpp"
+ #include "wx/listimpl.cpp"
- WX_DEFINE_OBJARRAY(wxMsgArray);
+ WX_DEFINE_LIST(wxMsgList)
#endif // wxUSE_THREADS
-// ----------------------------------------------------------------------------
-// wxEventLoopImpl
-// ----------------------------------------------------------------------------
-
-class WXDLLEXPORT wxEventLoopImpl
-{
-public:
- // ctor
- wxEventLoopImpl() { m_exitcode = 0; m_shouldExit = false; }
-
- // process a message
- void ProcessMessage(MSG *msg);
-
- // generate an idle message, return TRUE if more idle time requested
- bool SendIdleMessage();
-
- // set/get the exit code
- void Exit(int exitcode) { m_exitcode = exitcode; m_shouldExit = true; }
- int GetExitCode() const { return m_exitcode; }
- bool ShouldExit() const { return m_shouldExit; }
-
-private:
- // preprocess a message, return TRUE if processed (i.e. no further
- // dispatching required)
- bool PreProcessMessage(MSG *msg);
-
- // the exit code of the event loop
- int m_exitcode;
+// ============================================================================
+// wxEventLoop implementation
+// ============================================================================
- // true if we were asked to terminate
- bool m_shouldExit;
-};
+wxWindowMSW *wxEventLoop::ms_winCritical = NULL;
// ----------------------------------------------------------------------------
-// helper class
+// ctor/dtor
// ----------------------------------------------------------------------------
-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
+wxEventLoop::wxEventLoop()
{
-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;
-};
-
-// ============================================================================
-// wxEventLoopImpl implementation
-// ============================================================================
+ m_shouldExit = false;
+ m_exitcode = 0;
+}
// ----------------------------------------------------------------------------
-// wxEventLoopImpl message processing
+// wxEventLoop message processing
// ----------------------------------------------------------------------------
-void wxEventLoopImpl::ProcessMessage(MSG *msg)
+void wxEventLoop::ProcessMessage(WXMSG *msg)
{
// give us the chance to preprocess the message first
if ( !PreProcessMessage(msg) )
}
}
-bool wxEventLoopImpl::PreProcessMessage(MSG *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 *wnd;
- // 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
+ // this might happen if we're in a modeless dialog, or if a wx control has
+ // children which themselves were not created by wx (i.e. wxActiveX control children)
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 )
+ while ( hwnd && (::GetWindowLong(hwnd, GWL_STYLE) & WS_CHILD ))
{
hwnd = ::GetParent(hwnd);
+
+ // If the control has a wx parent, break and give the parent a chance
+ // to process the window message
+ wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
+ if (wndThis != NULL)
+ break;
}
- return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
+ if ( !wndThis )
+ {
+ // 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
+ // IsDialogMessage() to make TAB navigation in it work
+
+ // NOTE: IsDialogMessage() just eats all the messages (i.e. returns true for
+ // them) if we call it for the control itself
+ 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
// popup the tooltip bubbles
if ( msg->message == WM_MOUSEMOVE )
{
- wxToolTip *tt = wndThis->GetToolTip();
- if ( tt )
- {
- tt->RelayEvent((WXMSG *)msg);
- }
+ // we should do it if one of window children has an associated tooltip
+ // (and not just if the window has a tooltip itself)
+ if ( wndThis->HasToolTips() )
+ wxToolTip::RelayEvent((WXMSG *)msg);
}
#endif // wxUSE_TOOLTIPS
// grab Ctrl-C/V/X, even if they are also accelerators in some parent)
if ( !wndThis->MSWShouldPreProcessMessage((WXMSG *)msg) )
{
- return FALSE;
+ return false;
}
// try translations first: the accelerators override everything
- wxWindow *wnd;
-
for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
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
break;
}
- // 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() )
+ // now try the other hooks (kbd navigation is handled here)
+ for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
if ( wnd->MSWProcessMessage((WXMSG *)msg) )
- return TRUE;
+ return true;
+
+ // also stop at first top level window here, just as above because
+ // if we don't do this, pressing ESC on a modal dialog shown as child
+ // of a modal dialog with wxID_CANCEL will cause the parent dialog to
+ // be closed, for example
+ if ( wnd->IsTopLevel() )
+ break;
}
// no special preprocessing for this message, dispatch it normally
- return FALSE;
+ return false;
}
// ----------------------------------------------------------------------------
-// wxEventLoopImpl idle event processing
+// wxEventLoop running and exiting
// ----------------------------------------------------------------------------
-bool wxEventLoopImpl::SendIdleMessage()
-{
- return wxTheApp && wxTheApp->ProcessIdle();
-}
-
-// ============================================================================
-// wxEventLoop implementation
-// ============================================================================
-
-wxEventLoop *wxEventLoop::ms_activeLoop = NULL;
-
// ----------------------------------------------------------------------------
-// wxEventLoop running and exiting
+// wxEventLoopManual customization
// ----------------------------------------------------------------------------
-wxEventLoop::~wxEventLoop()
-{
- wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
-}
-
-bool wxEventLoop::IsRunning() const
+void wxEventLoop::OnNextIteration()
{
- return m_impl != NULL;
-}
-
-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") );
-
- // 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 ( ;; )
- {
- try
- {
-#endif // wxUSE_EXCEPTIONS
-
- // 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;
- }
- }
-
-#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 ( ... )
- {
- // OnException() throwed, possibly rethrowing the same
- // exception again: very good, but we still need OnExit() to
- // be called
- OnExit();
- throw;
- }
- }
- }
-#endif // wxUSE_EXCEPTIONS
-
- return m_impl->GetExitCode();
+#if wxUSE_THREADS
+ wxMutexGuiLeaveOrEnter();
+#endif // wxUSE_THREADS
}
-void wxEventLoop::Exit(int rc)
+void wxEventLoop::WakeUp()
{
- wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
-
- m_impl->Exit(rc);
-
- OnExit();
-
- // 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);
}
bool wxEventLoop::Dispatch()
{
- wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") );
+ wxCHECK_MSG( IsRunning(), false, _T("can't call Dispatch() if not running") );
MSG msg;
BOOL rc = ::GetMessage(&msg, (HWND) NULL, 0, 0);
if ( rc == 0 )
{
// got WM_QUIT
- return FALSE;
+ return false;
}
if ( rc == -1 )
wxLogLastError(wxT("GetMessage"));
// still break from the loop
- return FALSE;
+ return false;
}
#if wxUSE_THREADS
wxASSERT_MSG( wxThread::IsMain(),
wxT("only the main thread can process Windows messages") );
- static bool s_hadGuiLock = TRUE;
- static wxMsgArray s_aSavedMessages;
+ static bool s_hadGuiLock = true;
+ static wxMsgList s_aSavedMessages;
// if a secondary thread owning the mutex is doing GUI calls, save all
// messages for later processing - we can't process them right now because
// it will lead to recursive library calls (and we're not reentrant)
if ( !wxGuiOwnedByMainThread() )
{
- s_hadGuiLock = FALSE;
+ s_hadGuiLock = false;
// leave out WM_COMMAND messages: too dangerous, sometimes
// the message will be processed twice
if ( !wxIsWaitingForThread() || msg.message != WM_COMMAND )
{
- s_aSavedMessages.Add(msg);
+ MSG* pMsg = new MSG(msg);
+ s_aSavedMessages.Append(pMsg);
}
- return TRUE;
+ return true;
}
else
{
// messages normally - expect some things to break...
if ( !s_hadGuiLock )
{
- s_hadGuiLock = TRUE;
+ s_hadGuiLock = true;
- size_t count = s_aSavedMessages.Count();
- for ( size_t n = 0; n < count; n++ )
+ wxMsgList::compatibility_iterator node = s_aSavedMessages.GetFirst();
+ while (node)
{
- MSG& msg = s_aSavedMessages[n];
- m_impl->ProcessMessage(&msg);
- }
+ MSG* pMsg = node->GetData();
+ s_aSavedMessages.Erase(node);
- s_aSavedMessages.Empty();
+ ProcessMessage(pMsg);
+ delete pMsg;
+
+ node = s_aSavedMessages.GetFirst();
+ }
}
}
#endif // wxUSE_THREADS
- m_impl->ProcessMessage(&msg);
+ ProcessMessage(&msg);
- return TRUE;
+ return true;
}
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