Paul Davis
5097af6a13
git-svn-id: svn://localhost/ardour2/branches/3.0@11911 d708f5d6-7413-0410-9779-e7cbd77b26cf
103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
#ifndef mackie_jog_wheel
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#define mackie_jog_wheel
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#include "timer.h"
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#include <stack>
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#include <deque>
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#include <queue>
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class MackieControlProtocol;
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namespace Mackie
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{
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class SurfacePort;
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class Control;
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class ControlState;
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/**
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A jog wheel can be used to control many things. This
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handles all of the states and state transitions.
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Mainly it exists to avoid putting a bunch of messy
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stuff in MackieControlProtocol.
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But it doesn't really know who it is, with stacks, queues and various
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boolean state variables.
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*/
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class JogWheel
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{
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public:
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enum State { scroll, zoom, speed, scrub, shuttle, select };
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JogWheel (MackieControlProtocol & mcp);
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/// As the wheel turns...
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void jog_event (SurfacePort & port, Control & control, float delta);
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// These are for incoming button presses that change the internal state
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// but they're not actually used at the moment.
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void zoom_event (SurfacePort & port, Control & control, const ControlState & state);
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void scrub_event (SurfacePort & port, Control & control, const ControlState & state);
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void speed_event (SurfacePort & port, Control & control, const ControlState & state);
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void scroll_event (SurfacePort & port, Control & control, const ControlState & state);
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/// Return the current jog wheel mode, which defaults to Scroll
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State jog_wheel_state() const;
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/// The current transport speed for ffwd and rew. Can be
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/// set by wheel when they're pressed.
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float transport_speed() const { return _transport_speed; }
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/// one of -1,0,1
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int transport_direction() const { return _transport_direction; }
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void transport_direction (int rhs) { _transport_direction = rhs; }
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void push (State state);
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void pop();
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/// Turn zoom mode on and off
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void zoom_state_toggle();
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/**
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Cycle scrub -> shuttle -> previous
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*/
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State scrub_state_cycle();
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/// Check to see when the last scrub event was
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/// And stop scrubbing if it was too long ago.
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/// Intended to be called from a periodic timer of
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/// some kind.
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void check_scrubbing();
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protected:
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void add_scrub_interval (unsigned long elapsed);
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float average_scrub_interval();
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float std_dev_scrub_interval();
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private:
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MackieControlProtocol & _mcp;
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/// transport speed for ffwd and rew, controller by jog
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float _transport_speed;
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int _transport_direction;
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/// Speed for shuttle
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float _shuttle_speed;
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/// a stack for keeping track of states
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std::stack<State> _jog_wheel_states;
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/// So we know how fast to set the transport speed while scrubbing
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Timer _scrub_timer;
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/// to keep track of what the current scrub rate is
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/// so we can calculate a moving average
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std::deque<unsigned long> _scrub_intervals;
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};
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}
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#endif
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