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Fixed a stack overflow exception when a panel's scroll bar auto-hiding causes elements to gain height

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Ell 2023-10-14 15:02:58 +02:00
parent 6c07a7e900
commit 0571e8a4e1
2 changed files with 14 additions and 2 deletions
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1
CHANGELOG.md
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@ -34,6 +34,7 @@ Improvements
Fixes Fixes
- Fixed panels updating their relevant children too much when the scroll bar is hidden - Fixed panels updating their relevant children too much when the scroll bar is hidden
- Fixed a stack overflow exception when a panel's scroll bar auto-hiding causes elements to gain height
### MLEM.Data ### MLEM.Data
Fixes Fixes

15
MLEM.Ui/Elements/Panel.cs
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@ -56,6 +56,7 @@ namespace MLEM.Ui.Elements {
private readonly List<Element> relevantChildren = new List<Element>(); private readonly List<Element> relevantChildren = new List<Element>();
private readonly HashSet<Element> scrolledChildren = new HashSet<Element>(); private readonly HashSet<Element> scrolledChildren = new HashSet<Element>();
private readonly float[] scrollBarMaxHistory = new float[3];
private readonly bool scrollOverflow; private readonly bool scrollOverflow;
private RenderTarget2D renderTarget; private RenderTarget2D renderTarget;
@ -110,7 +111,10 @@ namespace MLEM.Ui.Elements {
throw new NotSupportedException($"A panel that handles overflow can't contain non-automatic anchors ({child})"); throw new NotSupportedException($"A panel that handles overflow can't contain non-automatic anchors ({child})");
} }
} }
base.ForceUpdateArea(); base.ForceUpdateArea();
Array.Clear(this.scrollBarMaxHistory, 0, this.scrollBarMaxHistory.Length);
this.SetScrollBarStyle(); this.SetScrollBarStyle();
} }
@ -273,8 +277,15 @@ namespace MLEM.Ui.Elements {
// the max value of the scroll bar is the amount of non-scaled pixels taken up by overflowing components // the max value of the scroll bar is the amount of non-scaled pixels taken up by overflowing components
var scrollBarMax = Math.Max(0, (childrenHeight - this.ChildPaddedArea.Height) / this.Scale); var scrollBarMax = Math.Max(0, (childrenHeight - this.ChildPaddedArea.Height) / this.Scale);
if (!this.ScrollBar.MaxValue.Equals(scrollBarMax, Element.Epsilon)) { if (!this.ScrollBar.MaxValue.Equals(scrollBarMax, Element.Epsilon)) {
this.ScrollBar.MaxValue = scrollBarMax; // avoid a show/hide oscillation that occurs while updating our area with children that can lose height when the scroll bar is shown (like long paragraphs)
this.relevantChildrenDirty = true; if (!this.scrollBarMaxHistory[0].Equals(this.scrollBarMaxHistory[2], Element.Epsilon) || !this.scrollBarMaxHistory[1].Equals(scrollBarMax, Element.Epsilon)) {
this.scrollBarMaxHistory[0] = this.scrollBarMaxHistory[1];
this.scrollBarMaxHistory[1] = this.scrollBarMaxHistory[2];
this.scrollBarMaxHistory[2] = scrollBarMax;
this.ScrollBar.MaxValue = scrollBarMax;
this.relevantChildrenDirty = true;
}
} }
// update child padding based on whether the scroll bar is visible // update child padding based on whether the scroll bar is visible