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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MESSAGE_PUMP_QT_H_
#define BASE_MESSAGE_PUMP_QT_H_
#include <qobject.h>
#include "base/message_pump.h"
#include "base/time.h"
class QTimer;
namespace base {
class MessagePumpForUI;
class MessagePumpQt : public QObject {
Q_OBJECT
public:
MessagePumpQt(MessagePumpForUI& pump);
~MessagePumpQt();
virtual bool event(QEvent* e);
void scheduleDelayedIfNeeded(const TimeTicks& delayed_work_time);
public Q_SLOTS:
void dispatchDelayed();
private:
base::MessagePumpForUI& pump;
QTimer* mTimer;
};
// This class implements a MessagePump needed for TYPE_UI MessageLoops on
// OS_LINUX platforms using QApplication event loop
class MessagePumpForUI : public MessagePump {
public:
MessagePumpForUI();
~MessagePumpForUI();
virtual void Run(Delegate* delegate);
virtual void Quit();
virtual void ScheduleWork();
virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
// Internal methods used for processing the pump callbacks. They are
// public for simplicity but should not be used directly.
// HandleDispatch is called after the poll has completed.
void HandleDispatch();
private:
// We may make recursive calls to Run, so we save state that needs to be
// separate between them in this structure type.
struct RunState {
Delegate* delegate;
// Used to flag that the current Run() invocation should return ASAP.
bool should_quit;
// Used to count how many Run() invocations are on the stack.
int run_depth;
};
RunState* state_;
// This is the time when we need to do delayed work.
TimeTicks delayed_work_time_;
// MessagePump implementation for Qt based on the GLib implement.
// On Qt we use a QObject base class and the
// default qApp in order to process events through QEventLoop.
MessagePumpQt qt_pump;
DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
};
} // namespace base
#endif // BASE_MESSAGE_PUMP_QT_H_
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