wxWidgets/include/wx/msw/evtloop.h
2007-05-14 23:43:39 +00:00

102 lines
2.7 KiB
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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/evtloop.h
// Purpose: wxEventLoop class for MSW
// Author: Vadim Zeitlin
// Modified by:
// Created: 2004-07-31
// RCS-ID: $Id$
// Copyright: (c) 2003-2004 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_EVTLOOP_H_
#define _WX_MSW_EVTLOOP_H_
#if wxUSE_GUI
#include "wx/window.h"
#endif
// ----------------------------------------------------------------------------
// wxEventLoop
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxMSWEventLoopBase : public wxEventLoopManual
{
public:
wxMSWEventLoopBase();
// implement base class pure virtuals
virtual bool Pending() const;
protected:
// get the next message from queue and return true or return false if we
// got WM_QUIT or an error occurred
bool GetNextMessage(WXMSG *msg);
};
#if wxUSE_GUI
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 void WakeUp();
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);
// critical window or NULL
static wxWindowMSW *ms_winCritical;
};
#else // !wxUSE_GUI
class WXDLLIMPEXP_BASE wxConsoleEventLoop : public wxMSWEventLoopBase
{
public:
wxConsoleEventLoop() { }
// override/implement base class virtuals
virtual bool Dispatch();
virtual void WakeUp();
protected:
virtual void OnNextIteration();
};
#endif // wxUSE_GUI/!wxUSE_GUI
#endif // _WX_MSW_EVTLOOP_H_