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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/evtloop.h
// Purpose: wxEventLoop class for wxMSW port
// Author: Vadim Zeitlin
// Modified by:
// Created: 2004-07-31
// Copyright: (c) 2003-2004 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_EVTLOOP_H_
#define _WX_MSW_EVTLOOP_H_
#include "wx/dynarray.h"
#include "wx/msw/wrapwin.h"
#include "wx/window.h"
#include "wx/msw/evtloopconsole.h" // for wxMSWEventLoopBase
// ----------------------------------------------------------------------------
// wxEventLoop
// ----------------------------------------------------------------------------
WX_DECLARE_EXPORTED_OBJARRAY(MSG, wxMSGArray);
class WXDLLIMPEXP_CORE wxGUIEventLoop : public wxMSWEventLoopBase
{
public:
wxGUIEventLoop() { }
// process a single message: calls PreProcessMessage() before dispatching
// it
virtual void ProcessMessage(WXMSG *msg);
// preprocess a message, return true if processed (i.e. no further
// dispatching required)
virtual bool PreProcessMessage(WXMSG *msg);
// set the critical window: this is the window such that all the events
// except those to this window (and its children) stop to be processed
// (typical examples: assert or crash report dialog)
//
// calling this function with NULL argument restores the normal event
// handling
static void SetCriticalWindow(wxWindowMSW *win) { ms_winCritical = win; }
// return true if there is no critical window or if this window is [a child
// of] the critical one
static bool AllowProcessing(wxWindowMSW *win)
{
return !ms_winCritical || IsChildOfCriticalWindow(win);
}
// override/implement base class virtuals
virtual bool Dispatch();
virtual int DispatchTimeout(unsigned long timeout);
virtual void WakeUp();
virtual bool YieldFor(long eventsToProcess);
protected:
virtual void OnNextIteration();
private:
// check if the given window is a child of ms_winCritical (which must be
// non NULL)
static bool IsChildOfCriticalWindow(wxWindowMSW *win);
// array of messages used for temporary storage by YieldFor()
wxMSGArray m_arrMSG;
// critical window or NULL
static wxWindowMSW *ms_winCritical;
};
#endif // _WX_MSW_EVTLOOP_H_
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