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avoid recursion in Element.ForceUpdateArea
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a477fef230
commit
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1 changed files with 101 additions and 119 deletions
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@ -174,7 +174,6 @@ namespace MLEM.Ui.Elements {
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}
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}
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private bool areaDirty;
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private int areaUpdateRecursionCount;
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/// <summary>
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/// The <see cref="UnscrolledArea"/> of this element, but with <see cref="ScaledScrollOffset"/> applied.
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/// </summary>
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@ -514,135 +513,118 @@ namespace MLEM.Ui.Elements {
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var parentArea = this.Parent != null ? this.Parent.ChildPaddedArea : (RectangleF) this.system.Viewport;
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var parentCenterX = parentArea.X + parentArea.Width / 2;
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var parentCenterY = parentArea.Y + parentArea.Height / 2;
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var actualSize = this.CalcActualSize(parentArea);
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var pos = new Vector2();
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switch (this.anchor) {
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case Anchor.TopLeft:
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case Anchor.AutoLeft:
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case Anchor.AutoInline:
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopCenter:
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case Anchor.AutoCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopRight:
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case Anchor.AutoRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.CenterLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.Center:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.CenterRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.BottomLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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}
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if (this.Anchor >= Anchor.AutoLeft) {
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Element previousChild;
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if (this.Anchor == Anchor.AutoInline || this.Anchor == Anchor.AutoInlineIgnoreOverflow) {
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previousChild = this.GetOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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} else {
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previousChild = this.GetLowestOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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}
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if (previousChild != null) {
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var prevArea = previousChild.GetAreaForAutoAnchors();
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switch (this.Anchor) {
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case Anchor.AutoLeft:
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case Anchor.AutoCenter:
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case Anchor.AutoRight:
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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break;
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case Anchor.AutoInline:
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var newX = prevArea.Right + this.ScaledOffset.X;
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if (newX + actualSize.X <= parentArea.Right) {
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pos.X = newX;
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pos.Y = prevArea.Y + this.ScaledOffset.Y;
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} else {
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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}
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break;
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = prevArea.Right + this.ScaledOffset.X;
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pos.Y = prevArea.Y + this.ScaledOffset.Y;
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break;
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}
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}
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}
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if (this.PreventParentSpill) {
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if (pos.X < parentArea.X)
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pos.X = parentArea.X;
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if (pos.Y < parentArea.Y)
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pos.Y = parentArea.Y;
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if (pos.X + actualSize.X > parentArea.Right)
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actualSize.X = parentArea.Right - pos.X;
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if (pos.Y + actualSize.Y > parentArea.Bottom)
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actualSize.Y = parentArea.Bottom - pos.Y;
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}
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this.area = new RectangleF(pos, actualSize);
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this.System.OnElementAreaUpdated?.Invoke(this);
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foreach (var child in this.Children)
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child.ForceUpdateArea();
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UpdateDisplayArea(this.CalcActualSize(parentArea));
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if (this.Children.Count > 0) {
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Element foundChild = null;
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var autoSize = this.DisplayArea.Size;
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if (this.SetHeightBasedOnChildren) {
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var lowest = this.GetLowestChild(e => !e.IsHidden);
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if (lowest != null) {
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var newHeight = (lowest.UnscrolledArea.Bottom - pos.Y + this.ScaledChildPadding.Bottom) / this.Scale;
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if (!newHeight.Equals(this.size.Y, 0.01F)) {
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this.size.Y = newHeight;
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foundChild = lowest;
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}
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}
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if (lowest != null)
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autoSize.Y = lowest.UnscrolledArea.Bottom - this.DisplayArea.Y + this.ScaledChildPadding.Bottom;
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}
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if (this.SetWidthBasedOnChildren) {
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var rightmost = this.GetRightmostChild(e => !e.IsHidden);
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if (rightmost != null) {
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var newWidth = (rightmost.UnscrolledArea.Right - pos.X + this.ScaledChildPadding.Right) / this.Scale;
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if (!newWidth.Equals(this.size.X, 0.01F)) {
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this.size.X = newWidth;
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foundChild = rightmost;
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if (rightmost != null)
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autoSize.X = rightmost.UnscrolledArea.Right - this.DisplayArea.X + this.ScaledChildPadding.Right;
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}
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if (autoSize != this.DisplayArea.Size)
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UpdateDisplayArea(autoSize);
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}
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void UpdateDisplayArea(Vector2 actualSize) {
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var pos = new Vector2();
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switch (this.anchor) {
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case Anchor.TopLeft:
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case Anchor.AutoLeft:
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case Anchor.AutoInline:
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopCenter:
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case Anchor.AutoCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.TopRight:
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case Anchor.AutoRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Y + this.ScaledOffset.Y;
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break;
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case Anchor.CenterLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.Center:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.CenterRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentCenterY - actualSize.Y / 2 + this.ScaledOffset.Y;
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break;
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case Anchor.BottomLeft:
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pos.X = parentArea.X + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomCenter:
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pos.X = parentCenterX - actualSize.X / 2 + this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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case Anchor.BottomRight:
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pos.X = parentArea.Right - actualSize.X - this.ScaledOffset.X;
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pos.Y = parentArea.Bottom - actualSize.Y - this.ScaledOffset.Y;
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break;
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}
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if (this.Anchor >= Anchor.AutoLeft) {
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Element previousChild;
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if (this.Anchor == Anchor.AutoInline || this.Anchor == Anchor.AutoInlineIgnoreOverflow) {
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previousChild = this.GetOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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} else {
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previousChild = this.GetLowestOlderSibling(e => !e.IsHidden && e.CanAutoAnchorsAttach);
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}
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if (previousChild != null) {
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var prevArea = previousChild.GetAreaForAutoAnchors();
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switch (this.Anchor) {
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case Anchor.AutoLeft:
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case Anchor.AutoCenter:
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case Anchor.AutoRight:
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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break;
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case Anchor.AutoInline:
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var newX = prevArea.Right + this.ScaledOffset.X;
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if (newX + actualSize.X <= parentArea.Right) {
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pos.X = newX;
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pos.Y = prevArea.Y + this.ScaledOffset.Y;
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} else {
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pos.Y = prevArea.Bottom + this.ScaledOffset.Y;
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}
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break;
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case Anchor.AutoInlineIgnoreOverflow:
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pos.X = prevArea.Right + this.ScaledOffset.X;
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pos.Y = prevArea.Y + this.ScaledOffset.Y;
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break;
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}
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}
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}
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if (foundChild != null) {
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this.areaUpdateRecursionCount++;
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if (this.areaUpdateRecursionCount >= 16) {
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throw new ArithmeticException($"The area of {this} with root {this.Root?.Name} has recursively updated too often. Does its child {foundChild} contain any conflicting auto-sizing settings?");
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} else {
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this.ForceUpdateArea();
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}
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} else {
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this.areaUpdateRecursionCount = 0;
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if (this.PreventParentSpill) {
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if (pos.X < parentArea.X)
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pos.X = parentArea.X;
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if (pos.Y < parentArea.Y)
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pos.Y = parentArea.Y;
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if (pos.X + actualSize.X > parentArea.Right)
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actualSize.X = parentArea.Right - pos.X;
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if (pos.Y + actualSize.Y > parentArea.Bottom)
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actualSize.Y = parentArea.Bottom - pos.Y;
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}
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this.area = new RectangleF(pos, actualSize);
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this.System.OnElementAreaUpdated?.Invoke(this);
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foreach (var child in this.Children)
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child.ForceUpdateArea();
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}
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}
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