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ensure that relevant panel children are updated when children are changed

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This commit is contained in:
Ell 2021-11-05 23:22:39 +01:00
parent cf48fc372e
commit 543201d178
1 changed files with 21 additions and 19 deletions
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40
MLEM.Ui/Elements/Panel.cs
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@ -128,7 +128,7 @@ namespace MLEM.Ui.Elements {
public override void ForceUpdateSortedChildren() { public override void ForceUpdateSortedChildren() {
base.ForceUpdateSortedChildren(); base.ForceUpdateSortedChildren();
if (this.scrollOverflow) if (this.scrollOverflow)
this.relevantChildrenDirty = true; this.ForceUpdateRelevantChildren();
} }
/// <inheritdoc /> /// <inheritdoc />
@ -147,24 +147,8 @@ namespace MLEM.Ui.Elements {
protected override IList<Element> GetRelevantChildren() { protected override IList<Element> GetRelevantChildren() {
var relevant = base.GetRelevantChildren(); var relevant = base.GetRelevantChildren();
if (this.scrollOverflow) { if (this.scrollOverflow) {
if (this.relevantChildrenDirty) { if (this.relevantChildrenDirty)
this.relevantChildrenDirty = false; this.ForceUpdateRelevantChildren();
var visible = this.GetRenderTargetArea();
this.relevantChildren.Clear();
foreach (var child in this.SortedChildren) {
if (child.Area.Intersects(visible)) {
this.relevantChildren.Add(child);
} else {
foreach (var c in child.GetChildren(regardGrandchildren: true)) {
if (c.Area.Intersects(visible)) {
this.relevantChildren.Add(child);
break;
}
}
}
}
}
relevant = this.relevantChildren; relevant = this.relevantChildren;
} }
return relevant; return relevant;
@ -272,5 +256,23 @@ namespace MLEM.Ui.Elements {
this.ScrollBar.PositionOffset = new Vector2(-this.ScrollerSize.Value.X - 1, 0); this.ScrollBar.PositionOffset = new Vector2(-this.ScrollerSize.Value.X - 1, 0);
} }
private void ForceUpdateRelevantChildren() {
this.relevantChildrenDirty = false;
this.relevantChildren.Clear();
var visible = this.GetRenderTargetArea();
foreach (var child in this.SortedChildren) {
if (child.Area.Intersects(visible)) {
this.relevantChildren.Add(child);
} else {
foreach (var c in child.GetChildren(regardGrandchildren: true)) {
if (c.Area.Intersects(visible)) {
this.relevantChildren.Add(child);
break;
}
}
}
}
}
} }
} }