/*
 * Copyright 2006-2010 Stephan Aßmus <superstippi@gmx.de>
 * All rights reserved. Distributed under the terms of the MIT License.
 */
#ifndef TRANSPORT_CONTROL_GROUP_H
#define TRANSPORT_CONTROL_GROUP_H


// NOTE: Based on my code in the BeOS interface for the VLC media player
// that I did during the VLC 0.4.3 - 0.4.6 times. Code not written by me
// removed. -Stephan Aßmus


#include <GroupView.h>


class BShape;
class DurationView;
class PeakView;
class PlayPauseButton;
class PositionToolTip;
class SeekSlider;
class SymbolButton;
class VolumeSlider;

enum {
        SKIP_BACK_ENABLED               = 1 << 0,
        SEEK_BACK_ENABLED               = 1 << 1,
        PLAYBACK_ENABLED                = 1 << 2,
        SEEK_FORWARD_ENABLED    = 1 << 3,
        SKIP_FORWARD_ENABLED    = 1 << 4,
        VOLUME_ENABLED                  = 1 << 5,
        SEEK_ENABLED                    = 1 << 6,
};


class TransportControlGroup : public BGroupView {
public:
                                                                TransportControlGroup(BRect frame,
                                                                        bool useSkipButtons, bool usePeakView,
                                                                        bool useWindButtons);
        virtual                                         ~TransportControlGroup();

        // BView interface
        virtual void                            AttachedToWindow();
        virtual void                            GetPreferredSize(float* width, float* height);
        virtual void                            MessageReceived(BMessage* message);

        // TransportControlGroup
        virtual uint32                          EnabledButtons();
        virtual void                            TogglePlaying();
        virtual void                            Stop();
        virtual void                            Rewind();
        virtual void                            Forward();
        virtual void                            SkipBackward();
        virtual void                            SkipForward();
        virtual void                            VolumeChanged(float value);
        virtual void                            ToggleMute();
        virtual void                            PositionChanged(float value);
        virtual bigtime_t                       TimePositionFor(float value);

                        void                            SetEnabled(uint32 whichButtons);

                        void                            SetPlaybackState(uint32 state);
                        void                            SetSkippable(bool backward, bool forward);

                        void                            SetAudioEnabled(bool enable);
                        void                            SetMuted(bool mute);

                        void                            SetVolume(float value);
                        void                            SetAudioChannelCount(int32 count);
                        void                            SetPosition(float value, bigtime_t position,
                                                                        bigtime_t duration);
                        float                           Position() const;

                        PeakView*                       GetPeakView() const
                                                                        { return fPeakView; }

                        void                            SetDisabledString(const char* string);
                        void                            SetSymbolScale(float scale);

private:
                        void                            _TogglePlaying();
                        void                            _Stop();
                        void                            _Rewind();
                        void                            _Forward();
                        void                            _SkipBackward();
                        void                            _SkipForward();
                        void                            _UpdateVolume();
                        void                            _ToggleMute();
                        void                            _UpdatePosition();

                        float                           _LinearToExponential(float db);
                        float                           _ExponentialToLinear(float db);
                        float                           _DbToGain(float db);
                        float                           _GainToDb(float gain);

                        BShape*                         _CreateSkipBackwardsShape(float height) const;
                        BShape*                         _CreateSkipForwardShape(float height) const;
                        BShape*                         _CreateRewindShape(float height) const;
                        BShape*                         _CreateForwardShape(float height) const;
                        BShape*                         _CreatePlayShape(float height) const;
                        BShape*                         _CreatePauseShape(float height) const;
                        BShape*                         _CreateStopShape(float height) const;
                        BShape*                         _CreateSpeakerShape(float height) const;

private:
                        SeekSlider*                     fSeekSlider;
                        DurationView*           fDurationView;
                        PositionToolTip*        fPositionToolTip;
                        PeakView*                       fPeakView;
                        VolumeSlider*           fVolumeSlider;

                        SymbolButton*           fSkipBack;
                        SymbolButton*           fSkipForward;
                        SymbolButton*           fRewind;
                        SymbolButton*           fForward;
                        PlayPauseButton*        fPlayPause;
                        SymbolButton*           fStop;
                        SymbolButton*           fMute;

                        BGroupLayout*           fSeekLayout;
                        BGroupLayout*           fControlLayout;

                        float                           fSymbolScale;
                        uint32                          fLastEnabledButtons;
};

#endif  // TRANSPORT_CONTROL_GROUP_H