diff options
Diffstat (limited to 'src/server/Event.hpp')
| -rw-r--r-- | src/server/Event.hpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/server/Event.hpp b/src/server/Event.hpp index 77249262..15ce386b 100644 --- a/src/server/Event.hpp +++ b/src/server/Event.hpp @@ -1,6 +1,6 @@ /* This file is part of Ingen. - Copyright 2007-2015 David Robillard <http://drobilla.net/> + Copyright 2007-2016 David Robillard <http://drobilla.net/> Ingen is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free @@ -53,6 +53,9 @@ class Event : public Raul::Deletable, public Raul::Noncopyable public: virtual ~Event() {} + /** Event mode to distinguish normal events from undo events. */ + enum class Mode { NORMAL, UNDO, REDO }; + /** Pre-process event before execution (non-realtime). */ virtual bool pre_process() = 0; @@ -62,6 +65,9 @@ public: /** Post-process event after execution (non-realtime). */ virtual void post_process() = 0; + /** Write the inverse of this event to `sink`. */ + virtual void undo(Interface& target) {} + /** Return true iff this event has been pre-processed. */ inline bool is_prepared() const { return _status != Status::NOT_PREPARED; } @@ -80,6 +86,14 @@ public: /** Return the status (success or error code) of this event. */ Status status() const { return _status; } + /** Return true iff this is a generated undo event. */ + Mode get_mode() const { return _mode; } + + /** Flag this event as a generated undo event. */ + void set_mode(Mode mode) { _mode = mode; } + + inline Engine& engine() { return _engine; } + protected: Event(Engine& engine, SPtr<Interface> client, int32_t id, FrameTime time) : _engine(engine) @@ -88,6 +102,7 @@ protected: , _request_id(id) , _time(time) , _status(Status::NOT_PREPARED) + , _mode(Mode::NORMAL) {} /** Constructor for internal events only */ @@ -97,6 +112,7 @@ protected: , _request_id(0) , _time(0) , _status(Status::NOT_PREPARED) + , _mode(Mode::NORMAL) {} inline bool pre_process_done(Status st) { @@ -128,6 +144,7 @@ protected: FrameTime _time; Status _status; std::string _err_subject; + Mode _mode; }; } // namespace Server |