private Rect[] CalculateItemRects(Size availableSize)
{
var itemRects = new Rect[this.InternalChildren.Count];
double offset = 0;
for (int i = 0; i < this.childrenLengths.Length; i++)
{
SplitPanelLength length = this.childrenLengths[i];
if (this.Orientation == Orientation.Horizontal)
{
double width = length.IsAbsolute
? length.Value
: Math.Max(0, (availableSize.Width - this.childrenLenghtFixed) * length.Value);
itemRects[i] = new Rect(offset, 0, width, availableSize.Height);
offset += width;
}
else if (this.Orientation == Orientation.Vertical)
{
double height = length.IsAbsolute
? length.Value
: Math.Max(0, (availableSize.Height - this.childrenLenghtFixed) * length.Value);
itemRects[i] = new Rect(0, offset, availableSize.Width, height);
offset += height;
}
}
return(itemRects);
}
private SplitPanelLength GeOffsetLength(UIElement element, double offestDelta)
{
SplitPanelLength elementLength = GetLength(element);
if (elementLength.IsStar)
{
double elementRenderLength = this.GetRenderLength(element);
if (elementRenderLength <= 0 || elementLength.Value <= 0)
{
UIElement foundChild = (from UIElement child in this.InternalChildren
let length = GetLength(child)
where length.IsStar && length.Value > 0
select child).FirstOrDefault();
if (foundChild == null)
{
return(new SplitPanelLength(1.0, SplitPanelUnitType.Star));
}
elementRenderLength = this.GetRenderLength(foundChild);
elementLength = GetLength(foundChild);
}
return(new SplitPanelLength(Math.Max(0, (elementLength.Value / elementRenderLength) * (elementRenderLength + offestDelta)), SplitPanelUnitType.Star));
}
if (elementLength.IsAbsolute)
{
return(new SplitPanelLength(elementLength.Value + offestDelta));
}
throw new NotImplementedException("SplitPanelUnitType.Auto is not supported");
}
/// <summary>
/// Returns a <see cref="String"/> that represents this instance.
/// </summary>
/// <param name="length">
/// The length.
/// </param>
/// <param name="cultureInfo">
/// The culture info.
/// </param>
/// <returns>
/// A <see cref="String"/> that represents this instance.
/// </returns>
internal static string ToString(SplitPanelLength length, CultureInfo cultureInfo)
{
switch (length.UnitType)
{
case SplitPanelUnitType.Auto:
return("Auto");
case SplitPanelUnitType.Star:
if (length.Value == 1.0d)
{
return("*");
}
return(Convert.ToString(length.Value, cultureInfo) + "*");
}
return(Convert.ToString(length.Value, cultureInfo));
}
/// <summary>
/// Sets the value of the Length attached property to a given <see cref="UIElement"/>.
/// </summary>
/// <param name="element">
/// The element on which to set the Length attached property.
/// </param>
/// <param name="value">
/// The property value to set.
/// </param>
public static void SetLength(UIElement element, SplitPanelLength value)
{
element.SetValue(LengthProperty, value);
}