/// <summary>
/// This updates any internal structures needed to keep the marginal areas
/// up-to-date with the <see cref="P:Northwoods.Go.GoSheet.TopLeftMargin" /> and <see cref="P:Northwoods.Go.GoSheet.BottomRightMargin" />
/// properties.
/// </summary>
/// <param name="childchanged"></param>
/// <remarks>
/// This does nothing if <see cref="P:Northwoods.Go.GoObject.Initializing" /> is true.
/// If there is a <see cref="P:Northwoods.Go.GoSheet.BackgroundImage" />, it is positioned relative to the <see cref="P:Northwoods.Go.GoSheet.MarginBounds" />
/// according to the <see cref="P:Northwoods.Go.GoSheet.BackgroundImageSpot" />.
/// If there is a <see cref="P:Northwoods.Go.GoSheet.Grid" />, it gets the same Bounds as the <see cref="P:Northwoods.Go.GoSheet.Paper" />.
/// </remarks>
public override void LayoutChildren(GoObject childchanged)
{
if (!base.Initializing)
{
base.LayoutChildren(childchanged);
SizeF topLeftMargin = TopLeftMargin;
SizeF bottomRightMargin = BottomRightMargin;
RectangleF marginBounds = MarginBounds;
if (BackgroundImage != null)
{
BackgroundImage.SetSpotLocation(BackgroundImageSpot, GetRectangleSpotLocation(marginBounds, BackgroundImageSpot));
}
GoObject goObject = Paper;
if (goObject == null)
{
goObject = this;
}
if (Grid != null)
{
Grid.Bounds = goObject.Bounds;
}
if (topLeftMargin.Width + bottomRightMargin.Width > goObject.Width)
{
topLeftMargin.Width = goObject.Width / 2f;
bottomRightMargin.Width = goObject.Width / 2f;
}
if (topLeftMargin.Height + bottomRightMargin.Height > goObject.Height)
{
topLeftMargin.Height = goObject.Height / 2f;
bottomRightMargin.Height = goObject.Height / 2f;
}
if (myLeft != null)
{
myLeft.Bounds = new RectangleF(marginBounds.X - topLeftMargin.Width, marginBounds.Y, topLeftMargin.Width, marginBounds.Height);
}
if (myRight != null)
{
myRight.Bounds = new RectangleF(marginBounds.X + marginBounds.Width, marginBounds.Y, bottomRightMargin.Width, marginBounds.Height);
}
if (myTop != null)
{
myTop.Bounds = new RectangleF(marginBounds.X - topLeftMargin.Width, marginBounds.Y - topLeftMargin.Height, marginBounds.Width + topLeftMargin.Width + bottomRightMargin.Width, topLeftMargin.Height);
}
if (myBottom != null)
{
myBottom.Bounds = new RectangleF(marginBounds.X - topLeftMargin.Width, marginBounds.Y + marginBounds.Height, marginBounds.Width + topLeftMargin.Width + bottomRightMargin.Width, bottomRightMargin.Height);
}
}
}
