private static void TryCalculatePreferredSizeDockedControl(IArrangedElement element, Rectangle newElementBounds, bool measureOnly, ref Size preferredSize, ref Rectangle remainingBounds)
{
if (measureOnly)
{
Size neededSize = new Size(
Math.Max(0, newElementBounds.Width - remainingBounds.Width),
Math.Max(0, newElementBounds.Height - remainingBounds.Height));
DockStyle dockStyle = GetDock(element);
if ((dockStyle == DockStyle.Top) || (dockStyle == DockStyle.Bottom))
{
neededSize.Width = 0;
}
if ((dockStyle == DockStyle.Left) || (dockStyle == DockStyle.Right))
{
neededSize.Height = 0;
}
if (dockStyle != DockStyle.Fill)
{
preferredSize += neededSize;
remainingBounds.Size += neededSize;
}
else if (dockStyle == DockStyle.Fill && CommonProperties.GetAutoSize(element))
{
Size elementPrefSize = element.GetPreferredSize(neededSize);
remainingBounds.Size += elementPrefSize;
preferredSize += elementPrefSize;
}
}
else
{
element.SetBounds(newElementBounds, BoundsSpecified.None);
#if DEBUG
Control control = element as Control;
newElementBounds.Size = control.ApplySizeConstraints(newElementBounds.Size);
// This usually happens when a Control overrides its SetBoundsCore or sets size during OnResize
// to enforce constraints like AutoSize. Generally you can just move this code to Control.GetAdjustedSize
// and then PreferredSize will also pick up these constraints. See ComboBox as an example.
if (CommonProperties.GetAutoSize(element) && !CommonProperties.GetSelfAutoSizeInDefaultLayout(element))
{
Debug.Assert(
(newElementBounds.Width < 0 || element.Bounds.Width == newElementBounds.Width) &&
(newElementBounds.Height < 0 || element.Bounds.Height == newElementBounds.Height),
"Element modified its bounds during docking -- PreferredSize will be wrong. See comment near this assert.");
}
#endif
}
}