public override Size ArrangeOverride(IPanelAdapter adapter, Size finalSize)
{
double usedHeight = 0;
var colWidth = finalSize.Width / Columns;
foreach (var row in measurements)
{
for (int i = 0; i < row.Items.Count; i++)
{
adapter.Arrange(row.Items[i], i * colWidth, usedHeight, colWidth, row.RowHeight);
}
usedHeight += row.RowHeight;
}
return(new Size(finalSize.Width, usedHeight));
}
public override Size MeasureOverride(IPanelAdapter adapter, Size availaibleSize)
{
if (adapter.ChildrenCount < 1)
{
return(new Size(1, 1));
}
// measure the first Child
adapter.Measure(0, availaibleSize);
var firstSize = adapter.GetDesiredSize(0);
for (int i = 1; i < adapter.ChildrenCount; i++)
{
adapter.Measure(i, firstSize);
}
return(firstSize);
}
public override Size MeasureOverride(IPanelAdapter adapter, Size availaibleSize)
{
measurements.Clear();
var cellSize = new Size();
for (int i = 0; i < adapter.ChildrenCount; i++)
{
if (i % Columns == 0)
{
cellSize = new Size(availaibleSize.Width / Columns,
availaibleSize.Height - measurements.Sum(j => j.RowHeight));
measurements.Add(new MeasurementRowHeight());
}
adapter.Measure(i, cellSize);
measurements.Last().AddItem(i, adapter.GetDesiredSize(i).Height);
}
return(new Size(availaibleSize.Width, measurements.Sum(i => i.RowHeight)));
}
public override Size ArrangeOverride(IPanelAdapter adapter, Size finalSize)
{
if (adapter.ChildrenCount < 1)
{
return(finalSize);
}
var desiredSize = adapter.GetDesiredSize(0);
var finalRect = new Rect(
new Point((finalSize.Width - desiredSize.Width) / 2, (finalSize.Height - desiredSize.Height) / 2), desiredSize);
var adjustedRect = ApplyOffset ? new Rect(OffsetPoint(finalRect, Offset.Left, Offset.Top),
OffsetPoint(finalRect, Offset.Right, Offset.Bottom)) : finalRect;
for (int i = 0; i < adapter.ChildrenCount; i++)
{
adapter.Arrange(i, i == 0 ? finalRect : adjustedRect);
}
return(finalSize);
}
public abstract Size ArrangeOverride(IPanelAdapter adapter, Size finalSize);
public abstract Size MeasureOverride(IPanelAdapter adapter, Size availaibleSize);
public static void Arrange(this IPanelAdapter adapter, int child, double left, double top, double width,
double height) =>
adapter.Arrange(child, new Rect(left, top, width, height));
public static void Measure(this IPanelAdapter adapter, int child, double width, double height) => adapter.Measure(child, new Size(width, height));