111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/*
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* Copyright 2001-2007, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Erik Jaesler (erik@cgsoftware.com)
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*/
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#ifndef _HANDLER_H
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#define _HANDLER_H
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#include <BeBuild.h>
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#include <Archivable.h>
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class BLooper;
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class BMessageFilter;
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class BMessage;
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class BMessenger;
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class BList;
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#define B_OBSERVE_WHAT_CHANGE "be:observe_change_what"
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#define B_OBSERVE_ORIGINAL_WHAT "be:observe_orig_what"
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const uint32 B_OBSERVER_OBSERVE_ALL = 0xffffffff;
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namespace BPrivate {
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class ObserverList;
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}
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class BHandler : public BArchivable {
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public:
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BHandler(const char* name = NULL);
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virtual ~BHandler();
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// Archiving
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BHandler(BMessage* data);
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static BArchivable* Instantiate(BMessage* data);
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virtual status_t Archive(BMessage* data, bool deep = true) const;
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// BHandler guts.
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virtual void MessageReceived(BMessage* message);
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BLooper* Looper() const;
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void SetName(const char* name);
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const char* Name() const;
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virtual void SetNextHandler(BHandler* handler);
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BHandler* NextHandler() const;
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// Message filtering
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virtual void AddFilter(BMessageFilter* filter);
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virtual bool RemoveFilter(BMessageFilter* filter);
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virtual void SetFilterList(BList* filters);
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BList* FilterList();
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bool LockLooper();
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status_t LockLooperWithTimeout(bigtime_t timeout);
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void UnlockLooper();
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// Scripting
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virtual BHandler* ResolveSpecifier(BMessage* msg, int32 index,
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BMessage* specifier, int32 form,
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const char* property);
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virtual status_t GetSupportedSuites(BMessage* data);
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// Observer calls, inter-looper and inter-team
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status_t StartWatching(BMessenger target, uint32 what);
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status_t StartWatchingAll(BMessenger target);
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status_t StopWatching(BMessenger target, uint32 what);
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status_t StopWatchingAll(BMessenger target);
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// Observer calls for observing targets in the local team
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status_t StartWatching(BHandler* observer, uint32 what);
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status_t StartWatchingAll(BHandler* observer);
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status_t StopWatching(BHandler* observer, uint32 what);
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status_t StopWatchingAll(BHandler* observer);
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// Reserved
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virtual status_t Perform(perform_code d, void* arg);
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// Notifier calls
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virtual void SendNotices(uint32 what, const BMessage* notice = NULL);
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bool IsWatched() const;
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private:
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typedef BArchivable _inherited;
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friend inline int32 _get_object_token_(const BHandler* );
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friend class BLooper;
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friend class BMessageFilter;
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virtual void _ReservedHandler2();
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virtual void _ReservedHandler3();
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virtual void _ReservedHandler4();
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void _InitData(const char* name);
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BPrivate::ObserverList* _ObserverList();
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BHandler(const BHandler&);
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BHandler& operator=(const BHandler&);
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void SetLooper(BLooper* looper);
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int32 fToken;
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char* fName;
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BLooper* fLooper;
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BHandler* fNextHandler;
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BList* fFilters;
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BPrivate::ObserverList* fObserverList;
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uint32 _reserved[3];
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};
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#endif // _HANDLER_H
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