src/apps/mediaplayer/interface/TransportControlGroup.h

   1 /*
   2  * Copyright 2006-2010 Stephan Aßmus <superstippi@gmx.de>
   3  * All rights reserved. Distributed under the terms of the MIT License.
   4  */
   5 #ifndef TRANSPORT_CONTROL_GROUP_H
   6 #define TRANSPORT_CONTROL_GROUP_H
   7
   8
   9 // NOTE: Based on my code in the BeOS interface for the VLC media player
  10 // that I did during the VLC 0.4.3 - 0.4.6 times. Code not written by me
  11 // removed. -Stephan Aßmus
  12
  13
  14 #include <GroupView.h>
  15
  16
  17 class BShape;
  18 class DurationView;
  19 class PeakView;
  20 class PlayPauseButton;
  21 class PositionToolTip;
  22 class SeekSlider;
  23 class SymbolButton;
  24 class VolumeSlider;
  25
  26 enum {
  27         SKIP_BACK_ENABLED               = 1 << 0,
  28         SEEK_BACK_ENABLED               = 1 << 1,
  29         PLAYBACK_ENABLED                = 1 << 2,
  30         SEEK_FORWARD_ENABLED    = 1 << 3,
  31         SKIP_FORWARD_ENABLED    = 1 << 4,
  32         VOLUME_ENABLED                  = 1 << 5,
  33         SEEK_ENABLED                    = 1 << 6,
  34 };
  35
  36
  37 class TransportControlGroup : public BGroupView {
  38 public:
  39                                                                 TransportControlGroup(BRect frame,
  40                                                                         bool useSkipButtons, bool usePeakView,
  41                                                                         bool useWindButtons);
  42         virtual                                         ~TransportControlGroup();
  43
  44         // BView interface
  45         virtual void                            AttachedToWindow();
  46         virtual void                            GetPreferredSize(float* width, float* height);
  47         virtual void                            MessageReceived(BMessage* message);
  48
  49         // TransportControlGroup
  50         virtual uint32                          EnabledButtons();
  51         virtual void                            TogglePlaying();
  52         virtual void                            Stop();
  53         virtual void                            Rewind();
  54         virtual void                            Forward();
  55         virtual void                            SkipBackward();
  56         virtual void                            SkipForward();
  57         virtual void                            VolumeChanged(float value);
  58         virtual void                            ToggleMute();
  59         virtual void                            PositionChanged(float value);
  60
  61                         void                            SetEnabled(uint32 whichButtons);
  62
  63                         void                            SetPlaybackState(uint32 state);
  64                         void                            SetSkippable(bool backward, bool forward);
  65
  66                         void                            SetAudioEnabled(bool enable);
  67                         void                            SetMuted(bool mute);
  68
  69                         void                            SetVolume(float value);
  70                         void                            SetAudioChannelCount(int32 count);
  71                         void                            SetPosition(float value, bigtime_t position,
  72                                                                         bigtime_t duration);
  73                         float                           Position() const;
  74
  75                         PeakView*                       GetPeakView() const
  76                                                                         { return fPeakView; }
  77
  78                         void                            SetDisabledString(const char* string);
  79                         void                            SetSymbolScale(float scale);
  80
  81 private:
  82                         void                            _TogglePlaying();
  83                         void                            _Stop();
  84                         void                            _Rewind();
  85                         void                            _Forward();
  86                         void                            _SkipBackward();
  87                         void                            _SkipForward();
  88                         void                            _UpdateVolume();
  89                         void                            _ToggleMute();
  90                         void                            _UpdatePosition();
  91
  92                         float                           _LinearToExponential(float db);
  93                         float                           _ExponentialToLinear(float db);
  94                         float                           _DbToGain(float db);
  95                         float                           _GainToDb(float gain);
  96
  97                         BShape*                         _CreateSkipBackwardsShape(float height) const;
  98                         BShape*                         _CreateSkipForwardShape(float height) const;
  99                         BShape*                         _CreateRewindShape(float height) const;
 100                         BShape*                         _CreateForwardShape(float height) const;
 101                         BShape*                         _CreatePlayShape(float height) const;
 102                         BShape*                         _CreatePauseShape(float height) const;
 103                         BShape*                         _CreateStopShape(float height) const;
 104                         BShape*                         _CreateSpeakerShape(float height) const;
 105
 106 private:
 107                         SeekSlider*                     fSeekSlider;
 108                         DurationView*           fDurationView;
 109                         PositionToolTip*        fPositionToolTip;
 110                         PeakView*                       fPeakView;
 111                         VolumeSlider*           fVolumeSlider;
 112
 113                         SymbolButton*           fSkipBack;
 114                         SymbolButton*           fSkipForward;
 115                         SymbolButton*           fRewind;
 116                         SymbolButton*           fForward;
 117                         PlayPauseButton*        fPlayPause;
 118                         SymbolButton*           fStop;
 119                         SymbolButton*           fMute;
 120
 121                         BGroupLayout*           fSeekLayout;
 122                         BGroupLayout*           fControlLayout;
 123
 124                         float                           fSymbolScale;
 125                         uint32                          fLastEnabledButtons;
 126 };
 127
 128 #endif  // TRANSPORT_CONTROL_GROUP_H