float _pointerSignalEventDelta(PointerScrollEvent evt)
{
float delta = widget.axis == Axis.horizontal
? evt.scrollDelta.dx
: evt.scrollDelta.dy;
if (AxisUtils.axisDirectionIsReversed(widget.axisDirection))
{
delta *= -1;
}
return(delta);
}
float _targetScrollOffsetForPointerScroll(PointerScrollEvent e)
{
float delta = widget.axis == Axis.horizontal
? e.scrollDelta.dx
: e.scrollDelta.dy;
if (AxisUtils.axisDirectionIsReversed(widget.axisDirection))
{
delta *= -1;
}
return(Mathf.Min(Mathf.Max(position.pixels + delta, position.minScrollExtent),
position.maxScrollExtent));
}
public override SliverGridLayout getLayout(SliverConstraints constraints)
{
float tileWidth =
(constraints.crossAxisExtent -
(material_._yearPickerColumnCount - 1) * material_._yearPickerRowSpacing) /
material_._yearPickerColumnCount;
return(new SliverGridRegularTileLayout(
childCrossAxisExtent: tileWidth,
childMainAxisExtent: material_._yearPickerRowHeight,
crossAxisCount: material_._yearPickerColumnCount,
crossAxisStride: tileWidth + material_._yearPickerRowSpacing,
mainAxisStride: material_._yearPickerRowHeight,
reverseCrossAxis: AxisUtils.axisDirectionIsReversed(constraints.crossAxisDirection)
));
}
public override SliverGridLayout getLayout(SliverConstraints constraints)
{
const int columnCount = daysPerWeek;
float tileWidth = constraints.crossAxisExtent / columnCount;
float tileHeight = Mathf.Min(material_._dayPickerRowHeight,
constraints.viewportMainAxisExtent / material_._maxDayPickerRowCount);
return(new SliverGridRegularTileLayout(
childCrossAxisExtent: tileWidth,
childMainAxisExtent: tileHeight,
crossAxisCount: columnCount,
crossAxisStride: tileWidth,
mainAxisStride: tileHeight,
reverseCrossAxis: AxisUtils.axisDirectionIsReversed(constraints.crossAxisDirection)
));
}
public override SliverGridLayout getLayout(SliverConstraints constraints)
{
D.assert(this._debugAssertIsValid());
float usableCrossAxisExtent =
constraints.crossAxisExtent - this.crossAxisSpacing * (this.crossAxisCount - 1);
float childCrossAxisExtent = usableCrossAxisExtent / this.crossAxisCount;
float childMainAxisExtent = childCrossAxisExtent / this.childAspectRatio;
return(new SliverGridRegularTileLayout(
crossAxisCount: this.crossAxisCount,
mainAxisStride: childMainAxisExtent + this.mainAxisSpacing,
crossAxisStride: childCrossAxisExtent + this.crossAxisSpacing,
childMainAxisExtent: childMainAxisExtent,
childCrossAxisExtent: childCrossAxisExtent,
reverseCrossAxis: AxisUtils.axisDirectionIsReversed(constraints.crossAxisDirection)
));
}
public override SliverGridLayout getLayout(SliverConstraints constraints)
{
const int columnCount = 7; // DateTime.daysPerWeek = 7
float tileWidth = constraints.crossAxisExtent / columnCount;
float tileHeight = Mathf.Min(
DatePickerUtils._kDayPickerRowHeight,
constraints.viewportMainAxisExtent / (DatePickerUtils._kMaxDayPickerRowCount + 1)
);
return(new SliverGridRegularTileLayout(
crossAxisCount: columnCount,
mainAxisStride: tileHeight,
crossAxisStride: tileWidth,
childMainAxisExtent: tileHeight,
childCrossAxisExtent: tileWidth,
reverseCrossAxis: AxisUtils.axisDirectionIsReversed(constraints.crossAxisDirection)
));
}