computeAbsolutePaintOffset method
- RenderSliver child,
- double layoutOffset,
- GrowthDirection growthDirection
The offset at which the given child
should be painted.
The returned offset is from the top left corner of the inside of the
viewport to the top left corner of the paint coordinate system of the
child
.
See also:
- paintOffsetOf, which uses the layout offset and growth direction computed for the child during layout.
Implementation
@protected
Offset computeAbsolutePaintOffset(RenderSliver child, double layoutOffset, GrowthDirection growthDirection) {
assert(hasSize); // this is only usable once we have a size
assert(child.geometry != null);
return switch (applyGrowthDirectionToAxisDirection(axisDirection, growthDirection)) {
AxisDirection.up => Offset(0.0, size.height - layoutOffset - child.geometry!.paintExtent),
AxisDirection.left => Offset(size.width - layoutOffset - child.geometry!.paintExtent, 0.0),
AxisDirection.right => Offset(layoutOffset, 0.0),
AxisDirection.down => Offset(0.0, layoutOffset),
};
}