private static bool TryCalculatePreferredSize(IArrangedElement container, bool measureOnly, out Size preferredSize)
{
ArrangedElementCollection children = container.Children;
// PreferredSize is garbage unless measureOnly is specified
preferredSize = new Size(-7103, -7105);
// Short circuit for items with no children
if (!measureOnly && children.Count == 0)
{
return(CommonProperties.GetAutoSize(container));
}
bool dock = false;
bool anchor = false;
bool autoSize = false;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = children[i];
if (CommonProperties.GetNeedsDockAndAnchorLayout(element))
{
if (!dock && CommonProperties.GetNeedsDockLayout(element))
{
dock = true;
}
if (!anchor && CommonProperties.GetNeedsAnchorLayout(element))
{
anchor = true;
}
if (!autoSize && CommonProperties.xGetAutoSizedAndAnchored(element))
{
autoSize = true;
}
}
}
Debug.WriteLineIf(CompModSwitches.RichLayout.TraceInfo, "\tanchor : " + anchor.ToString());
Debug.WriteLineIf(CompModSwitches.RichLayout.TraceInfo, "\tdock : " + dock.ToString());
Size preferredSizeForDocking = Size.Empty;
Size preferredSizeForAnchoring = Size.Empty;
if (dock)
{
preferredSizeForDocking = LayoutDockedControls(container, measureOnly);
}
if (anchor && !measureOnly)
{
// In the case of anchor, where we currently are defines the preferred size,
// so dont recalculate the positions of everything.
LayoutAnchoredControls(container);
}
if (autoSize)
{
LayoutAutoSizedControls(container);
}
if (!measureOnly)
{
// Set the anchored controls to their computed positions.
ApplyCachedBounds(container);
}
else
{
// Finish the preferredSize computation and clear cached anchored positions.
preferredSizeForAnchoring = GetAnchorPreferredSize(container);
Padding containerPadding = Padding.Empty;
if (container is Control control)
{
// Calling this will respect Control.DefaultPadding.
containerPadding = control.Padding;
}
else
{
// Not likely to happen but handle this gracefully.
containerPadding = CommonProperties.GetPadding(container, Padding.Empty);
}
preferredSizeForAnchoring.Width -= containerPadding.Left;
preferredSizeForAnchoring.Height -= containerPadding.Top;
ClearCachedBounds(container);
preferredSize = LayoutUtils.UnionSizes(preferredSizeForDocking, preferredSizeForAnchoring);
}
return(CommonProperties.GetAutoSize(container));
}
private static bool xLayout(IArrangedElement container, bool measureOnly, out Size preferredSize)
{
ArrangedElementCollection children = container.Children;
preferredSize = new Size(-7103, -7105);
if (measureOnly || (children.Count != 0))
{
bool flag = false;
bool flag2 = false;
bool flag3 = false;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = children[i];
if (CommonProperties.GetNeedsDockAndAnchorLayout(element))
{
if (!flag && CommonProperties.GetNeedsDockLayout(element))
{
flag = true;
}
if (!flag2 && CommonProperties.GetNeedsAnchorLayout(element))
{
flag2 = true;
}
if (!flag3 && CommonProperties.xGetAutoSizedAndAnchored(element))
{
flag3 = true;
}
}
}
Size empty = Size.Empty;
Size b = Size.Empty;
if (flag)
{
empty = LayoutDockedControls(container, measureOnly);
}
if (flag2 && !measureOnly)
{
LayoutAnchoredControls(container);
}
if (flag3)
{
LayoutAutoSizedControls(container);
}
if (!measureOnly)
{
ApplyCachedBounds(container);
}
else
{
b = GetAnchorPreferredSize(container);
Padding padding = Padding.Empty;
Control control = container as Control;
if (control != null)
{
padding = control.Padding;
}
else
{
padding = CommonProperties.GetPadding(container, Padding.Empty);
}
b.Width -= padding.Left;
b.Height -= padding.Top;
ClearCachedBounds(container);
preferredSize = LayoutUtils.UnionSizes(empty, b);
}
}
return(CommonProperties.GetAutoSize(container));
}