ViewportState.initial constructor
ViewportState.initial()
Implementation
factory ViewportState.initial() => const ViewportState(
scrollOffsetX: 0,
scrollOffsetY: 0,
viewportWidth: 0,
viewportHeight: 0,
firstVisibleRow: 0,
lastVisibleRow: 0,
firstVisibleColumn: 0,
lastVisibleColumn: 0,
);