ebb3a791b9
This reverts 6c40531fb7 ("Make main thread wake
up code more efficient and less error-prone in wxMSW") as, while being more
efficient, the new code doesn't work at all when we're not running the message
loop ourselves as it happens when the user opens a menu or starts resizing a
window because in both cases Windows runs a local message loop dispatching the
messages itself and this message loop doesn't react to our event object being
signalled.
So this approach can't work and needs to be reverted, even if it reintroduces
the danger of overflowing the message queue (see #9053).
Closes #17579.
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/evtloop.h
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// Purpose: wxEventLoop class for wxMSW port
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 2004-07-31
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// Copyright: (c) 2003-2004 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_MSW_EVTLOOP_H_
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#define _WX_MSW_EVTLOOP_H_
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#include "wx/dynarray.h"
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#include "wx/msw/wrapwin.h"
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#include "wx/window.h"
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#include "wx/msw/evtloopconsole.h" // for wxMSWEventLoopBase
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// ----------------------------------------------------------------------------
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// wxEventLoop
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// ----------------------------------------------------------------------------
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WX_DECLARE_EXPORTED_OBJARRAY(MSG, wxMSGArray);
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class WXDLLIMPEXP_CORE wxGUIEventLoop : public wxMSWEventLoopBase
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{
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public:
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wxGUIEventLoop() { }
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// process a single message: calls PreProcessMessage() before dispatching
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// it
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virtual void ProcessMessage(WXMSG *msg);
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// preprocess a message, return true if processed (i.e. no further
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// dispatching required)
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virtual bool PreProcessMessage(WXMSG *msg);
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// set the critical window: this is the window such that all the events
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// except those to this window (and its children) stop to be processed
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// (typical examples: assert or crash report dialog)
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//
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// calling this function with NULL argument restores the normal event
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// handling
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static void SetCriticalWindow(wxWindowMSW *win) { ms_winCritical = win; }
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// return true if there is no critical window or if this window is [a child
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// of] the critical one
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static bool AllowProcessing(wxWindowMSW *win)
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{
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return !ms_winCritical || IsChildOfCriticalWindow(win);
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}
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// override/implement base class virtuals
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virtual bool Dispatch();
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virtual int DispatchTimeout(unsigned long timeout);
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virtual void WakeUp();
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protected:
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virtual void OnNextIteration();
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virtual void DoYieldFor(long eventsToProcess);
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private:
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// check if the given window is a child of ms_winCritical (which must be
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// non NULL)
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static bool IsChildOfCriticalWindow(wxWindowMSW *win);
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// array of messages used for temporary storage by YieldFor()
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wxMSGArray m_arrMSG;
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// critical window or NULL
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static wxWindowMSW *ms_winCritical;
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};
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#endif // _WX_MSW_EVTLOOP_H_
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