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Added a fail-safe for elements with conflicting auto-sizing settings so that they don't cause a cryptic stack overflow

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Ell 2020-09-23 00:41:24 +02:00
parent eeedb0ae5c
commit 333b4b033e
2 changed files with 22 additions and 5 deletions
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19
MLEM.Ui/Elements/Element.cs
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@ -175,6 +175,7 @@ namespace MLEM.Ui.Elements {
}
}
private bool areaDirty;
private int areaUpdateRecursionCount;
/// <summary>
/// The <see cref="UnscrolledArea"/> of this element, but with <see cref="ScaledScrollOffset"/> applied.
/// </summary>
@ -612,14 +613,14 @@ namespace MLEM.Ui.Elements {
child.ForceUpdateArea();
if (this.Children.Count > 0) {
var changed = false;
Element foundChild = null;
if (this.SetHeightBasedOnChildren) {
var lowest = this.GetLowestChild(e => !e.IsHidden);
if (lowest != null) {
var newHeight = (lowest.UnscrolledArea.Bottom - pos.Y + this.ScaledChildPadding.Bottom) / this.Scale;
if (!newHeight.Equals(this.size.Y, 0.01F)) {
this.size.Y = newHeight;
changed = true;
foundChild = lowest;
}
}
}
@ -629,12 +630,20 @@ namespace MLEM.Ui.Elements {
var newWidth = (rightmost.UnscrolledArea.Right - pos.X + this.ScaledChildPadding.Right) / this.Scale;
if (!newWidth.Equals(this.size.X, 0.01F)) {
this.size.X = newWidth;
changed = true;
foundChild = rightmost;
}
}
}
if (changed)
this.ForceUpdateArea();
if (foundChild != null) {
this.areaUpdateRecursionCount++;
if (this.areaUpdateRecursionCount >= 16) {
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?");
} else {
this.ForceUpdateArea();
}
} else {
this.areaUpdateRecursionCount = 0;
}
}
}

8
Sandbox/GameImpl.cs
View file

@ -191,6 +191,14 @@ namespace Sandbox {
testPanel.AddChild(new Button(Anchor.AutoLeft, new Vector2(0.25F, -1)));
testPanel.AddChild(new Button(Anchor.AutoLeft, new Vector2(2500, 1)) {PreventParentSpill = true});
this.UiSystem.Add("Test", testPanel);
var invalidPanel = new Panel(Anchor.Center, Vector2.Zero, Vector2.Zero) {
SetWidthBasedOnChildren = true,
SetHeightBasedOnChildren = true
};
invalidPanel.AddChild(new Paragraph(Anchor.AutoRight, 1, "This is some test text!", true));
invalidPanel.AddChild(new VerticalSpace(1));
this.UiSystem.Add("Invalid", invalidPanel);
}
protected override void DoUpdate(GameTime gameTime) {