X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3808e191421b1337b3c688cf6d75efa43582547a..e4ffab299a1a214fbdd9e3941909323875b32e28:/src/msw/evtloop.cpp diff --git a/src/msw/evtloop.cpp b/src/msw/evtloop.cpp index 8f45f1e05f..c2540c8ee9 100644 --- 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 -// License: wxWindows license +// License: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -17,7 +17,7 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "evtloop.h" #endif @@ -29,12 +29,30 @@ #endif #ifndef WX_PRECOMP + #include "wx/window.h" + #include "wx/app.h" #endif //WX_PRECOMP #include "wx/evtloop.h" +#include "wx/tooltip.h" +#include "wx/except.h" +#include "wx/ptr_scpd.h" +#include "wx/scopeguard.h" + #include "wx/msw/private.h" +#if wxUSE_THREADS + #include "wx/thread.h" + + // define the array of MSG strutures + WX_DECLARE_OBJARRAY(MSG, wxMsgArray); + + #include "wx/arrimpl.cpp" + + WX_DEFINE_OBJARRAY(wxMsgArray); +#endif // wxUSE_THREADS + // ---------------------------------------------------------------------------- // wxEventLoopImpl // ---------------------------------------------------------------------------- @@ -64,6 +82,36 @@ private: int m_exitcode; }; +// ---------------------------------------------------------------------------- +// 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; +}; + // ============================================================================ // wxEventLoopImpl implementation // ============================================================================ @@ -85,13 +133,29 @@ void wxEventLoopImpl::ProcessMessage(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 ( wndThis && (msg->message == WM_MOUSEMOVE) ) + if ( msg->message == WM_MOUSEMOVE ) { wxToolTip *tt = wndThis->GetToolTip(); if ( tt ) @@ -101,22 +165,39 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg) } #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; + for ( wnd = wndThis; wnd; wnd = wnd->GetParent() ) { - if ( wnd->MSWTranslateMessage((WXMSG *)msg) ) + if ( wnd->MSWTranslateMessage((WXMSG *)msg)) 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; } + // no special preprocessing for this message, dispatch it normally return FALSE; } @@ -126,15 +207,15 @@ bool wxEventLoopImpl::PreProcessMessage(MSG *msg) bool wxEventLoopImpl::SendIdleMessage() { - wxIdleEvent event; - - return wxTheApp->ProcessEvent(event) && event.MoreRequested(); + return wxTheApp->ProcessIdle(); } // ============================================================================ // wxEventLoop implementation // ============================================================================ +wxEventLoop *wxEventLoop::ms_activeLoop = NULL; + // ---------------------------------------------------------------------------- // wxEventLoop running and exiting // ---------------------------------------------------------------------------- @@ -154,7 +235,13 @@ 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") ); - m_impl = new wxEventLoopImpl; + // 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); + + wxON_BLOCK_EXIT_OBJ0(*this, &wxEventLoop::OnExit); for ( ;; ) { @@ -167,8 +254,8 @@ int wxEventLoop::Run() while ( !Pending() && m_impl->SendIdleMessage() ) ; - // a message came or no more idle processing to do, sit in Dispatch() - // waiting for the next message + // a message came or no more idle processing to do, sit in + // Dispatch() waiting for the next message if ( !Dispatch() ) { // we got WM_QUIT @@ -176,11 +263,7 @@ int wxEventLoop::Run() } } - int exitcode = m_impl->GetExitCode(); - delete m_impl; - m_impl = NULL; - - return exitcode; + return m_impl->GetExitCode(); } void wxEventLoop::Exit(int rc) @@ -240,10 +323,9 @@ bool wxEventLoop::Dispatch() // leave out WM_COMMAND messages: too dangerous, sometimes // the message will be processed twice - if ( !wxIsWaitingForThread() || - s_currentMsg.message != WM_COMMAND ) + if ( !wxIsWaitingForThread() || msg.message != WM_COMMAND ) { - s_aSavedMessages.Add(s_currentMsg); + s_aSavedMessages.Add(msg); } return TRUE;