/// <summary>
/// Performs layout changes based on the element given as a paramater.
/// Sizes and places are determined by the concrete layout panel that is used.
/// Since all layout panels update their layout automatically through events,
/// this function is rarely used directly.
/// </summary>
/// <param name="affectedElement"></param>
public override void PerformLayoutCore(RadElement affectedElement)
{
int nextLeftTop = 0, nextRightBottom = 0;
Rectangle bounds = this.Bounds;
bounds.Size = TelerikLayoutEngine.CheckSize(this.Size, this.MaxSize, this.MinSize);
List <PreferredSizeData> prefSizelist = new List <PreferredSizeData>();
FillPrefSizeList(prefSizelist, bounds);
if (!this.ShouldIgnoreChildSizes())
{
bounds.Size = GetChildrenListSize(prefSizelist);
}
foreach (PreferredSizeData data in prefSizelist)
{
if (data.Element.Visibility != ElementVisibility.Collapsed)
{
StripPosition pos = GetInvariantPosition(data.Element.Alignment);
switch (pos)
{
case StripPosition.First:
SetElementBoundsAuto(bounds, data, nextLeftTop);
nextLeftTop += GetInvariantLength(data.Element.BoundingRectangle.Size, data.Element.Margin);
break;
case StripPosition.Middle:
SetElementBoundsAuto(bounds, data, 0);
break;
case StripPosition.Last:
SetElementBoundsAuto(bounds, data, nextRightBottom);
nextRightBottom -= GetInvariantLength(data.Element.BoundingRectangle.Size, data.Element.Margin);
break;
}
}
}
}
protected virtual void SetElementBoundsAuto(Rectangle bounds, PreferredSizeData data, int offset)
{
Point location = ItemsOffset;
if (this.Orientation == Orientation.Horizontal)
{
location.X += offset;
}
else
{
location.Y += offset;
}
if (data.Element.AutoSize && data.Element.ElementState == ElementState.Loaded)
{
Size prefSize = this.GetElementPreferredSize(bounds, data);
if (this.IsFitInSize())
{
Size availableSize = Size.Subtract(bounds.Size, this.LayoutEngine.GetBorderSize());
availableSize = Size.Subtract(availableSize, data.Element.Margin.Size);
prefSize = TelerikLayoutEngine.CheckSize(prefSize, availableSize, Size.Empty);
}
Size tempSize = Size.Subtract(this.Size, data.Element.Margin.Size);
if (this.ForceElementsWidth && prefSize.Width < tempSize.Width)
{
prefSize.Width = tempSize.Width;
}
if (this.ForceElementsHeight && prefSize.Height < tempSize.Height)
{
prefSize.Height = tempSize.Height;
}
data.Element.SetBounds(new Rectangle(location, prefSize));
}
else
{
data.Element.Location = location;
}
}