Line data    Source code

       1              : #pragma once
       2              : 
       3              : #include <Banks/Bank.hpp>
       4              : #include <Control_Surface/Control_Surface_Class.hpp>
       5              : #include <Def/Def.hpp>
       6              : 
       7              : BEGIN_CS_NAMESPACE
       8              : 
       9              : /// Class for transposing the address of @ref NoteButton and other MIDI elements.
      10              : template <int8_t MinTransposition, int8_t MaxTransposition>
      11              : class Transposer : public Bank<MaxTransposition - MinTransposition + 1> {
      12              :   public:
      13            4 :     Transposer(int8_t step = 1)
      14            4 :         : Bank<NumBanks>(step, -MinTransposition, MinTransposition) {
      15              :         static_assert(MinTransposition <= 0,
      16              :                       "Error: the minimum transposition must be negative");
      17              :         static_assert(MaxTransposition >= 0,
      18              :                       "Error: the maximum transposition must be positive");
      19            4 :     }
      20              : 
      21              :     /// Set the transposition.
      22              :     /// @param  tp
      23              :     ///         The new transposition in the range
      24              :     ///         [ @p MinTransposition, @p MaxTransposition ].
      25              :     /// @note   The @ref Bank::select() method expects a zero-based argument,
      26              :     ///         which is cumbersome if the minimum transposition is nonzero.
      27            8 :     void setTransposition(int8_t tp) { this->select(tp - MinTransposition); }
      28              : 
      29              :     /// Get the transposition.
      30            8 :     int8_t getTransposition() const {
      31            8 :         return this->getSelection() + MinTransposition;
      32              :     }
      33              : 
      34              :     /// Get the transposition as a number of semitones.
      35            8 :     int8_t getTranspositionSemitones() const { return this->getOffset(); }
      36              : 
      37              :     static constexpr setting_t N = MaxTransposition - MinTransposition + 1;
      38              :     static constexpr setting_t NumBanks = N;
      39              : };
      40              : 
      41              : END_CS_NAMESPACE