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///////////////////////////////////////////////////////////////////////////////
// Name: wx/evtloopsrc.h
// Purpose: declaration of wxEventLoopSource class
// Author: Vadim Zeitlin
// Created: 2009-10-21
// Copyright: (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_EVTLOOPSRC_H_
#define _WX_EVTLOOPSRC_H_
// Include the header to get wxUSE_EVENTLOOP_SOURCE definition from it.
#include "wx/evtloop.h"
// ----------------------------------------------------------------------------
// wxEventLoopSource: a source of events which may be added to wxEventLoop
// ----------------------------------------------------------------------------
// TODO: refactor wxSocket under Unix to reuse wxEventLoopSource instead of
// duplicating much of its logic
//
// TODO: freeze the API and document it
#if wxUSE_EVENTLOOP_SOURCE
#define wxTRACE_EVT_SOURCE "EventSource"
// handler used to process events on event loop sources
class wxEventLoopSourceHandler
{
public:
// called when descriptor is available for non-blocking read
virtual void OnReadWaiting() = 0;
// called when descriptor is available for non-blocking write
virtual void OnWriteWaiting() = 0;
// called when there is exception on descriptor
virtual void OnExceptionWaiting() = 0;
// virtual dtor for the base class
virtual ~wxEventLoopSourceHandler() { }
};
// flags describing which kind of IO events we're interested in
enum
{
wxEVENT_SOURCE_INPUT = 0x01,
wxEVENT_SOURCE_OUTPUT = 0x02,
wxEVENT_SOURCE_EXCEPTION = 0x04,
wxEVENT_SOURCE_ALL = wxEVENT_SOURCE_INPUT |
wxEVENT_SOURCE_OUTPUT |
wxEVENT_SOURCE_EXCEPTION
};
// wxEventLoopSource itself is an ABC and can't be created directly, currently
// the only way to create it is by using wxEventLoop::AddSourceForFD().
class wxEventLoopSource
{
public:
// dtor is pure virtual because it must be overridden to remove the source
// from the event loop monitoring it
virtual ~wxEventLoopSource() = 0;
void SetHandler(wxEventLoopSourceHandler* handler) { m_handler = handler; }
wxEventLoopSourceHandler* GetHandler() const { return m_handler; }
void SetFlags(int flags) { m_flags = flags; }
int GetFlags() const { return m_flags; }
protected:
// ctor is only used by the derived classes
wxEventLoopSource(wxEventLoopSourceHandler *handler, int flags)
: m_handler(handler),
m_flags(flags)
{
}
wxEventLoopSourceHandler* m_handler;
int m_flags;
wxDECLARE_NO_COPY_CLASS(wxEventLoopSource);
};
inline wxEventLoopSource::~wxEventLoopSource() { }
#if defined(__UNIX__)
#include "wx/unix/evtloopsrc.h"
#endif // __UNIX__
#if defined(__WXGTK20__)
#include "wx/gtk/evtloopsrc.h"
#endif
#if defined(__DARWIN__)
#include "wx/osx/evtloopsrc.h"
#endif
#endif // wxUSE_EVENTLOOP_SOURCE
#endif // _WX_EVTLOOPSRC_H_
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