haiku/src/servers/app/EventDispatcher.h

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/*
* Copyright 2005, Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*
* Authors:
* Axel Dörfler, axeld@pinc-software.de
*/
#ifndef EVENT_DISPATCHER_H
#define EVENT_DISPATCHER_H
#include <Locker.h>
#include <Messenger.h>
#include <ObjectList.h>
class BMessageFilter;
class EventStream;
class HWInterface;
class EventDispatcher : public BLocker {
public:
EventDispatcher();
~EventDispatcher();
status_t SetTo(EventStream* stream);
status_t InitCheck();
void SetFocus(const BMessenger* messenger);
bool AddListener(const BMessenger& messenger, int32 token,
uint32 eventMask, uint32 options);
bool AddTemporaryListener(const BMessenger& messenger,
int32 token, uint32 eventMask, uint32 options);
void RemoveListener(const BMessenger& messenger, int32 token);
void RemoveTemporaryListener(const BMessenger& messenger, int32 token);
void SetMouseFilter(BMessageFilter* filter);
void SetKeyboardFilter(BMessageFilter* filter);
bool HasCursorThread();
void SetHWInterface(HWInterface* interface);
private:
struct event_target;
status_t _Run();
void _Unset();
bool _SendMessage(BMessenger& messenger, BMessage* message, float importance);
void _SetTransit(BMessage* message, int32 transit);
void _UnsetTransit(BMessage* message);
bool _AddTokens(BMessage* message, BList& tokens);
void _RemoveTokens(BMessage* message);
void _SetToken(BMessage* message, int32 token);
void _SetFeedFocus(BMessage* message);
void _UnsetFeedFocus(BMessage* message);
event_target* _FindListener(const BMessenger& messenger, int32 token,
int32* _index = NULL);
bool _AddListener(const BMessenger& messenger, int32 token,
uint32 eventMask, uint32 options, bool temporary);
void _RemoveTemporaryListener(event_target* target, int32 index);
void _RemoveTemporaryListeners();
void _EventLoop();
void _CursorLoop();
static status_t _event_looper(void* dispatcher);
static status_t _cursor_looper(void* dispatcher);
private:
EventStream* fStream;
thread_id fThread;
thread_id fCursorThread;
BMessenger fFocus;
BMessenger fLastFocus;
bool fHasFocus;
bool fHasLastFocus;
bool fTransit;
BList fLastFocusTokens;
BList fFocusTokens;
bool fSuspendFocus;
BMessageFilter* fMouseFilter;
BMessageFilter* fKeyboardFilter;
BObjectList<event_target> fListeners;
BLocker fCursorLock;
HWInterface* fHWInterface;
};
#endif /* EVENT_DISPATCHER_H */