render method

@override void render(Buffer buffer, Rect area)

Renders the widget onto the provided buffer within the specified area.

Implementation

@override
void render(Buffer buffer, Rect area) {
  if (area.width <= 0 || area.height <= 0 || itemCount <= 0) return;

  scrollOffset = scrollOffset.clamp(0, itemCount - 1);

  for (var i = 0; i < area.height; i++) {
    final index = scrollOffset + i;
    if (index >= itemCount) break;

    final childWidget = itemBuilder(index);
    final childArea = Rect(0, i, area.width, 1);
    final vp = Viewport(buffer, childArea);
    childWidget.render(vp, Rect(0, 0, area.width, 1));
  }
}