class column {
    enum { pt_note, pt_trigger, pt_byte, pt_word, pt_float } type;
    float min, max, default_value;
    void *column_user_data;
};

interface IPatternEditor {
    void set_pattern(int rows, int tracks, column[] globals, column []locals, void *user_data);
    void set_sample(int sample);
};

interface IPatternEditorHost {
    float get_value(int row, int track, int param, void *user_data, void *column_user_data);
    void set_value(int row, int track, int param, float value, bool skip_playing, void *user_data, void *column_user_data);
};