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// Copyright (c) 2011 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_GLIB_X_DISPATCH_H
#define BASE_MESSAGE_PUMP_GLIB_X_DISPATCH_H
#include "base/base_api.h"
#include "base/message_pump.h"
#include "base/message_pump_glib.h"
typedef union _XEvent XEvent;
namespace base {
// The message pump used for TOUCH_UI on linux is MessagePumpGlibX, which can
// dispatch both GdkEvents* and XEvents* captured directly from X.
// MessagePumpForUI::Dispatcher provides the mechanism for dispatching
// GdkEvents. This class provides additional mechanism for dispatching XEvents.
class MessagePumpGlibXDispatcher : public MessagePumpForUI::Dispatcher {
public:
enum DispatchStatus {
EVENT_IGNORED, // The event was not processed.
EVENT_PROCESSED, // The event has been processed.
EVENT_QUIT // The event was processed and the message-loop should
// terminate.
};
// Dispatches the event. EVENT_IGNORED is returned if the event was ignored
// (i.e. not processed). EVENT_PROCESSED is returned if the event was
// processed. The nested loop exits immediately if EVENT_QUIT is returned.
virtual DispatchStatus DispatchX(XEvent* xevent) = 0;
};
class BASE_API MessagePumpXObserver : public MessagePumpForUI::Observer {
public:
// This method is called before processing an XEvent. If the method returns
// true, it indicates the event has already been handled, so the event is not
// processed any farther. If the method returns false, the event dispatching
// proceeds as normal.
virtual bool WillProcessXEvent(XEvent* xevent);
};
} // namespace base
#endif // BASE_MESSAGE_PUMP_GLIB_X_DISPATCH_H
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