Event emitted when the split sizes change.
Sizes are expressed as a [first, second] tuple where each value is the percentage of the container occupied by that panel.
[first, second]
The orientation of the split at the time of the event.
Panel sizes as percentages (0–100).
Event emitted when the split sizes change.
Sizes are expressed as a
[first, second]tuple where each value is the percentage of the container occupied by that panel.