X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/676d655065f5736d20034e124a9381a9cac8000b..1ac76609146a74466b88e53b551e9ea01c5c8801:/src/msw/evtloop.cpp diff --git a/src/msw/evtloop.cpp b/src/msw/evtloop.cpp index 2a4da8b446..805fb95ef4 100644 --- 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" @@ -41,101 +37,38 @@ #include "wx/msw/private.h" -// For MB_TASKMODAL -#ifdef __WXWINCE__ -#include "wx/msw/wince/missing.h" -#endif - #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; } - - enum wxCatchAllResponse { - catch_continue, - catch_exit, - catch_rethrow - }; - wxCatchAllResponse OnCatchAll(); - -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) ) @@ -146,25 +79,61 @@ void wxEventLoopImpl::ProcessMessage(MSG *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 @@ -185,16 +154,14 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg) // 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 @@ -203,161 +170,43 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg) 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; + if (wnd != wndThis) // Skip the first since wndThis->MSWProcessMessage() was called above + { + if ( wnd->MSWProcessMessage((WXMSG *)msg) ) + return true; + } + + // Stop at first top level window (as per comment above). + // 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->ProcessIdle(); -} - // ---------------------------------------------------------------------------- -// wxEventLoopImpl exception handling +// wxEventLoopManual customization // ---------------------------------------------------------------------------- -wxEventLoopImpl::wxCatchAllResponse wxEventLoopImpl::OnCatchAll() -{ - switch (::MessageBox(NULL, - _T("An unhandled exception occurred. 'Abort' will terminate the program,\r\n\ -'Retry' will close the current dialog, 'Ignore' will try to continue."), - _T("Unhandled exception"), - MB_ABORTRETRYIGNORE|MB_ICONERROR|MB_TASKMODAL)) - { - case IDABORT: return catch_rethrow; - case IDRETRY: return catch_exit; - case IDIGNORE: return catch_continue; - } - return catch_rethrow; -} - -// ============================================================================ -// wxEventLoop implementation -// ============================================================================ - -wxEventLoop *wxEventLoop::ms_activeLoop = NULL; - -// ---------------------------------------------------------------------------- -// wxEventLoop running and exiting -// ---------------------------------------------------------------------------- - -wxEventLoop::~wxEventLoop() -{ - wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") ); -} - -bool wxEventLoop::IsRunning() const -{ - return m_impl != NULL; -} - -int wxEventLoop::Run() +void wxEventLoop::OnNextIteration() { - // 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 - bool retryAfterException; - do { - retryAfterException=false; -#endif - wxTRY - { - 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; - } - } - } - wxCATCH_ALL( - switch (m_impl->OnCatchAll()) { - case wxEventLoopImpl::catch_continue: - retryAfterException=true; - break; - case wxEventLoopImpl::catch_exit: - OnExit(); - break; - case wxEventLoopImpl::catch_rethrow: - OnExit(); - // should be replaced with wx macro, but - // there is none yet. OTOH, wxCATCH_ALL isn't - // expanded unless wxUSE_EXCEPTIONS, so its - // safe to use throw here. - throw; - break; - } - ) -#if wxUSE_EXCEPTIONS - } while (retryAfterException); -#endif - - 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); } @@ -373,7 +222,7 @@ bool wxEventLoop::Pending() const 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); @@ -381,7 +230,7 @@ bool wxEventLoop::Dispatch() if ( rc == 0 ) { // got WM_QUIT - return FALSE; + return false; } if ( rc == -1 ) @@ -390,31 +239,32 @@ bool wxEventLoop::Dispatch() 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 { @@ -425,22 +275,25 @@ bool wxEventLoop::Dispatch() // 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); + + ProcessMessage(pMsg); + delete pMsg; - s_aSavedMessages.Empty(); + node = s_aSavedMessages.GetFirst(); + } } } #endif // wxUSE_THREADS - m_impl->ProcessMessage(&msg); + ProcessMessage(&msg); - return TRUE; + return true; }