protected virtual void MeasureChild(RecyclerView parent, RecyclerViewItem child)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (child == null)
{
throw new ArgumentNullException(nameof(child));
}
if (child.Layout == null)
{
return;
}
//FIXME: This measure can be restricted size of child to be less than parent size.
// but our parent can be not calculated yet, also some child can be bigger than it's parent size,
// so we use implicit value 9999 as restricted specification.
MeasureSpecification childWidthMeasureSpec = LayoutGroup.GetChildMeasureSpecification(
new MeasureSpecification(new LayoutLength(9999), MeasureSpecification.ModeType.Exactly),
new LayoutLength(0),
new LayoutLength(child.WidthSpecification));
MeasureSpecification childHeightMeasureSpec = LayoutGroup.GetChildMeasureSpecification(
new MeasureSpecification(new LayoutLength(9999), MeasureSpecification.ModeType.Exactly),
new LayoutLength(0),
new LayoutLength(child.HeightSpecification));
child.Layout.Measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
protected virtual void MeasureChild(RecyclerView parent, RecyclerViewItem child)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (child == null)
{
throw new ArgumentNullException(nameof(child));
}
if (child.Layout == null)
{
return;
}
//FIXME: This measure can be restricted size of child to be less than parent size.
// but in some multiple-line TextLabel can be long enough to over the it's parent size.
MeasureSpecification childWidthMeasureSpec = LayoutGroup.GetChildMeasureSpecification(
new MeasureSpecification(new LayoutLength(parent.Size.Width - parent.Padding.Start - parent.Padding.End - child.Margin.Start - child.Margin.End), MeasureSpecification.ModeType.Exactly),
new LayoutLength(0),
new LayoutLength(child.WidthSpecification));
MeasureSpecification childHeightMeasureSpec = LayoutGroup.GetChildMeasureSpecification(
new MeasureSpecification(new LayoutLength(parent.Size.Height - parent.Padding.Top - parent.Padding.Bottom - child.Margin.Top - child.Margin.Bottom), MeasureSpecification.ModeType.Exactly),
new LayoutLength(0),
new LayoutLength(child.HeightSpecification));
child.Layout.Measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
public void LayoutGroupGetChildMeasureSpecification()
{
tlog.Debug(tag, $"LayoutGroupGetChildMeasureSpecification START");
MeasureSpecification parentMeasureSpec = new MeasureSpecification(new LayoutLength(10), MeasureSpecification.ModeType.Exactly);
LayoutLength padding = new LayoutLength(0);
LayoutLength childDimension = new LayoutLength(10);
MeasureSpecification measureSpec = LayoutGroup.GetChildMeasureSpecification(parentMeasureSpec, padding, childDimension);
Assert.AreEqual((double)(measureSpec.GetSize().AsRoundedValue()), 10.0f, "Should be the value set.");
Assert.AreEqual(measureSpec.GetMode(), MeasureSpecification.ModeType.Exactly, "ModeType should match.");
tlog.Debug(tag, $"LayoutGroupGetChildMeasureSpecification END (OK)");
}
