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Piano: Move piano roll internals to AudioEngine

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The piano roll data definitely belongs in AudioEngine along with the
note and time data. Now RollWidget only has GUI information, much like
the other widgets.

Note that this commit exacerbates issue #1158 which is caused by
RollWidget::paint_event().
This commit is contained in:
William McPherson 2020-02-06 19:13:25 +11:00 • committed by Andreas Kling
parent 82d17d2c79
commit 9a05bbaace
6 changed files with 47 additions and 38 deletions
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2
Applications/Piano/Music.h
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@ -116,6 +116,8 @@ constexpr int black_keys_per_octave = 5;
constexpr int octave_min = 1;
constexpr int octave_max = 7;
constexpr int horizontal_notes = 32;
// Equal temperament, A = 440Hz
// We calculate note frequencies relative to A4:
// 440.0 * pow(pow(2.0, 1.0 / 12.0), N)