public static bool hitTestBoxChild(this RenderSliver it, HitTestResult result, RenderBox child,
float mainAxisPosition = 0.0f, float crossAxisPosition = 0.0f)
{
bool rightWayUp = _getRightWayUp(it.constraints);
float absolutePosition = mainAxisPosition - it.childMainAxisPosition(child);
float absoluteCrossAxisPosition = crossAxisPosition - it.childCrossAxisPosition(child);
switch (it.constraints.axis)
{
case Axis.horizontal:
if (!rightWayUp)
{
absolutePosition = child.size.width - absolutePosition;
}
return(child.hitTest(result,
position: new Offset(absolutePosition, absoluteCrossAxisPosition)));
case Axis.vertical:
if (!rightWayUp)
{
absolutePosition = child.size.height - absolutePosition;
}
return(child.hitTest(result,
position: new Offset(absoluteCrossAxisPosition, absolutePosition)));
}
return(false);
}
public static void applyPaintTransformForBoxChild(this RenderSliver it, RenderBox child,
Matrix3 transform)
{
bool rightWayUp = _getRightWayUp(it.constraints);
float delta = it.childMainAxisPosition(child);
float crossAxisDelta = it.childCrossAxisPosition(child);
switch (it.constraints.axis)
{
case Axis.horizontal:
if (!rightWayUp)
{
delta = it.geometry.paintExtent - child.size.width - delta;
}
transform.preTranslate(delta, crossAxisDelta);
break;
case Axis.vertical:
if (!rightWayUp)
{
delta = it.geometry.paintExtent - child.size.height - delta;
}
transform.preTranslate(crossAxisDelta, delta);
break;
}
}
public RenderSliverIgnorePointer(
RenderSliver sliver = null,
bool ignoring = true
)
{
_ignoring = ignoring;
child = sliver;
}
public SliverHitTestEntry(RenderSliver target,
float mainAxisPosition = 0.0f,
float crossAxisPosition = 0.0f
) : base(target)
{
this.mainAxisPosition = mainAxisPosition;
this.crossAxisPosition = crossAxisPosition;
}
public SliverHitTestEntry(RenderSliver target,
double mainAxisPosition = 0.0,
double crossAxisPosition = 0.0
) : base(target)
{
this.mainAxisPosition = mainAxisPosition;
this.crossAxisPosition = crossAxisPosition;
}
public RenderSliverOpacity(
RenderSliver sliver = null,
float opacity = 1.0f
) : base(child: sliver)
{
D.assert(opacity >= 0.0 && opacity <= 1.0);
_opacity = opacity;
_alpha = ui.Color.getAlphaFromOpacity(opacity);
}
public RenderSliverPadding(
EdgeInsetsGeometry padding = null,
TextDirection?textDirection = null,
RenderSliver child = null
)
{
D.assert(padding != null);
D.assert(padding.isNonNegative);
_padding = padding;
_textDirection = textDirection ?? TextDirection.ltr;
this.child = child;
}
public static bool hitTestBoxChild(
this RenderSliver it,
BoxHitTestResult result,
RenderBox child,
float mainAxisPosition = 0.0f,
float crossAxisPosition = 0.0f)
{
bool rightWayUp = _getRightWayUp(it.constraints);
float? delta = it.childMainAxisPosition(child);
float? crossAxisDelta = it.childCrossAxisPosition(child);
float? absolutePosition = mainAxisPosition - delta;
float? absoluteCrossAxisPosition = crossAxisPosition - crossAxisDelta;
Offset paintOffset = null;
Offset transformedPosition = null;
switch (it.constraints.axis)
{
case Axis.horizontal:
if (!rightWayUp)
{
absolutePosition = child.size.width - absolutePosition;
delta = it.geometry.paintExtent - child.size.width - delta;
}
paintOffset = new Offset(delta ?? 0.0f, crossAxisDelta ?? 0.0f);
transformedPosition = new Offset(absolutePosition ?? 0.0f, absoluteCrossAxisPosition ?? 0.0f);
break;
case Axis.vertical:
if (!rightWayUp)
{
absolutePosition = child.size.height - absolutePosition;
delta = it.geometry.paintExtent - child.size.height - delta;
}
paintOffset = new Offset(crossAxisDelta ?? 0.0f, delta ?? 0.0f);
transformedPosition = new Offset(absoluteCrossAxisPosition ?? 0.0f, absolutePosition ?? 0.0f);
break;
}
D.assert(paintOffset != null);
D.assert(transformedPosition != null);
return(result.addWithPaintOffset(
offset: paintOffset,
position: null, // Manually adapting from sliver to box position above.
hitTest: (BoxHitTestResult boxHitTestResult, Offset _) => {
return child.hitTest(boxHitTestResult, position: transformedPosition);
}
));
}
public RenderSliverOffstage(
RenderSliver sliver = null,
bool offstage = true) : base(child: sliver)
{
_offstage = offstage;
}