A virtual piano for flutter, that renders the keys of a piano and with support for interaction and highlighting.


Keys are based on MIDI note values so middle C (4) is 63. Key callback are onNoteReleased, onNotePressed and onNotePressSlide. onNoteReleased and onNotePressSlide has two arguments, the relevant note and the vertical position of the touch/slide on the key. The latter can be used for simulating variable velocity or polyphonic aftertouch.


  noteRange: const RangeValues(21, 108),
  highlightedNoteSets: const [
    HighlightedNoteSet({44, 55, 77, 32}, Colors.green),
  onNotePressed: (note, pos) {
    // Play note