private static Rectangle GetGrowthBounds(IArrangedElement element, Size newSize)
{
GrowthDirection direction = GetGrowthDirection(element);
Rectangle oldBounds = GetCachedBounds(element);
Point location = oldBounds.Location;
Debug.Assert((CommonProperties.GetAutoSizeMode(element) == AutoSizeMode.GrowAndShrink || (newSize.Height >= oldBounds.Height && newSize.Width >= oldBounds.Width)),
"newSize expected to be >= current size.");
if ((direction & GrowthDirection.Left) != GrowthDirection.None)
{
// We are growing towards the left, translate X
location.X -= newSize.Width - oldBounds.Width;
}
if ((direction & GrowthDirection.Upward) != GrowthDirection.None)
{
// We are growing towards the top, translate Y
location.Y -= newSize.Height - oldBounds.Height;
}
Rectangle newBounds = new Rectangle(location, newSize);
Debug.Assert((CommonProperties.GetAutoSizeMode(element) == AutoSizeMode.GrowAndShrink || newBounds.Contains(oldBounds)), "How did we resize in such a way we no longer contain our old bounds?");
return(newBounds);
}
private static void LayoutAutoSizedControls(IArrangedElement container)
{
ArrangedElementCollection children = container.Children;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = children[i];
if (CommonProperties.xGetAutoSizedAndAnchored(element))
{
Rectangle bounds = GetCachedBounds(element);
AnchorStyles anchor = GetAnchor(element);
Size proposedConstraints = LayoutUtils.MaxSize;
if ((anchor & (AnchorStyles.Left | AnchorStyles.Right)) == (AnchorStyles.Left | AnchorStyles.Right))
{
proposedConstraints.Width = bounds.Width;
}
if ((anchor & (AnchorStyles.Top | AnchorStyles.Bottom)) == (AnchorStyles.Top | AnchorStyles.Bottom))
{
proposedConstraints.Height = bounds.Height;
}
Size prefSize = element.GetPreferredSize(proposedConstraints);
Rectangle newBounds = bounds;
if (CommonProperties.GetAutoSizeMode(element) == AutoSizeMode.GrowAndShrink)
{
// this is the case for simple things like radio button, checkbox, etc.
newBounds = GetGrowthBounds(element, prefSize);
}
else
{
// we had whacked this check, but it turns out it causes undesirable
// behavior in things like panel. a panel with no elements sizes to 0,0.
if (bounds.Width < prefSize.Width || bounds.Height < prefSize.Height)
{
Size newSize = LayoutUtils.UnionSizes(bounds.Size, prefSize);
newBounds = GetGrowthBounds(element, newSize);
}
}
if (newBounds != bounds)
{
SetCachedBounds(element, newBounds);
}
}
}
}
private static void LayoutAutoSizedControls(IArrangedElement container)
{
ArrangedElementCollection children = container.Children;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = children[i];
if (CommonProperties.xGetAutoSizedAndAnchored(element))
{
Rectangle cachedBounds = GetCachedBounds(element);
AnchorStyles anchor = GetAnchor(element);
Size preferredSize = element.DisplayRectangle.Size;
//Size maxSize = cachedBounds.Size;
if ((anchor & (AnchorStyles.Right | AnchorStyles.Left)) == (AnchorStyles.Right | AnchorStyles.Left))
{
preferredSize.Width = cachedBounds.Width;
}
if ((anchor & (AnchorStyles.Bottom | AnchorStyles.Top)) == (AnchorStyles.Bottom | AnchorStyles.Top))
{
preferredSize.Height = cachedBounds.Height;
}
Rectangle bounds = cachedBounds;
if (CommonProperties.GetAutoSizeMode(element) == AutoSizeMode.GrowAndShrink)
{
bounds = GetGrowthBounds(element, preferredSize);
}
else if ((cachedBounds.Width < preferredSize.Width) || (cachedBounds.Height < preferredSize.Height))
{
Size newSize = LayoutUtils.UnionSizes(cachedBounds.Size, preferredSize);
bounds = GetGrowthBounds(element, newSize);
}
if (bounds != cachedBounds)
{
SetCachedBounds(element, bounds);
}
}
}
}