/// <summary>
/// Replaces a cell view with another in the collection.
/// </summary>
/// <param name="oldCellView">The cell view to replace.</param>
/// <param name="newCellView">The new cell view.</param>
public virtual void Replace(IFrameCellView oldCellView, IFrameCellView newCellView)
{
Debug.Assert(CellViewList.Contains(oldCellView));
Debug.Assert(!CellViewList.Contains(newCellView));
int Index = CellViewList.IndexOf(oldCellView);
Replace(Index, newCellView);
}
/// <summary>
/// Measures the cell.
/// </summary>
/// <param name="collectionWithSeparator">A collection that can draw separators around the cell.</param>
/// <param name="referenceContainer">The cell view in <paramref name="collectionWithSeparator"/> that contains this cell.</param>
/// <param name="separatorLength">The length of the separator in <paramref name="collectionWithSeparator"/>.</param>
public virtual void Measure(ILayoutCellViewCollection collectionWithSeparator, ILayoutCellView referenceContainer, Measure separatorLength)
{
CollectionWithSeparator = collectionWithSeparator;
ReferenceContainer = referenceContainer;
SeparatorLength = separatorLength;
Debug.Assert(StateView != null);
Debug.Assert(StateView.ControllerView != null);
ILayoutMeasureContext MeasureContext = StateView.ControllerView.MeasureContext;
Debug.Assert(MeasureContext != null);
ILayoutFrameWithHorizontalSeparator AsFrameWithHorizontalSeparator = Frame as ILayoutFrameWithHorizontalSeparator;
Debug.Assert(AsFrameWithHorizontalSeparator != null);
bool OverrideReferenceContainer = false;
// Ensures arguments of Arrange() are valid. This only happens for the root cell view, where there is no separator.
if (collectionWithSeparator == null && referenceContainer == null)
{
collectionWithSeparator = this;
OverrideReferenceContainer = true;
separatorLength = Controller.Measure.Zero;
}
Measure Width = Controller.Measure.Zero;
Measure Height = Controller.Measure.Floating;
for (int i = 0; i < CellViewList.Count; i++)
{
ILayoutCellView CellView = CellViewList[i];
if (i > 0)
{
// Starting with the second cell, we use the separator of our frame.
if (i == 1)
{
collectionWithSeparator = this;
OverrideReferenceContainer = true;
separatorLength = MeasureContext.GetHorizontalSeparatorWidth(AsFrameWithHorizontalSeparator.Separator);
}
Width += separatorLength;
}
if (OverrideReferenceContainer)
{
referenceContainer = CellView;
}
Debug.Assert(collectionWithSeparator != this || CellViewList.IndexOf(referenceContainer) == i);
CellView.Measure(collectionWithSeparator, referenceContainer, separatorLength);
Size NestedCellSize = CellView.CellSize;
Debug.Assert(RegionHelper.IsValid(NestedCellSize));
bool IsFixed = RegionHelper.IsFixed(NestedCellSize);
bool IsStretched = RegionHelper.IsStretchedVertically(NestedCellSize);
Debug.Assert(IsFixed || IsStretched);
Debug.Assert(!NestedCellSize.Width.IsFloating);
Width += NestedCellSize.Width;
if (IsFixed)
{
Debug.Assert(!NestedCellSize.Height.IsFloating);
if (Height.IsFloating || Height.Draw < NestedCellSize.Height.Draw)
{
Height = NestedCellSize.Height;
}
}
}
Size AccumulatedSize = Size.Empty;
if (!Width.IsZero)
{
AccumulatedSize = new Size(Width, Height + (HasBlockGeometry ? MeasureContext.BlockGeometryHeight : Controller.Measure.Zero));
}
CellSize = AccumulatedSize;
ActualCellSize = RegionHelper.InvalidSize;
Debug.Assert(RegionHelper.IsValid(CellSize));
}