UI: b/piano-ctrl.js: support resizing multiple notes in a selection

tim-janik / anklang

MIDI and Audio Synthesizer and Composer

https://anklang.testbit.eu/

Mozilla Public License 2.0

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Closed swesterfeld closed 11 months ago

swesterfeld commented 11 months ago

Improve Piano Roll:

if multiple notes are selected, allow drag-resizing all of them at the same time with the mouse, preserving their relative length difference
if a note is drag-resized with the mouse that was not previously selected, automatically select the drag-resized note and unselect all other notes