- override
Override this method to check whether any children are located at the given position.
Typically children should be hit-tested in reverse paint order so that hit tests at locations where children overlap hit the child that is visually "on top" (i.e., paints later).
Used by hitTest. If you override hitTest and do not call this
function, then you don't need to implement this function.
Source
@override
bool hitTestChildren(HitTestResult result, { Point position }) {
assert(_children.length == rows * columns);
for (int index = _children.length - 1; index >= 0; index -= 1) {
RenderBox child = _children[index];
if (child != null) {
final BoxParentData childParentData = child.parentData;
Point transformed = new Point(position.x - childParentData.offset.dx,
position.y - childParentData.offset.dy);
if (child.hitTest(result, position: transformed))
return true;
}
}
return false;
}