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further improved performance of panels when removing a large amount of children

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Ell 2024-04-02 13:36:24 +02:00
parent 7f4cc773ec
commit 3bb3ae20c0
1 changed files with 12 additions and 1 deletions
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13
MLEM.Ui/Elements/Panel.cs
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@ -64,6 +64,7 @@ namespace MLEM.Ui.Elements {
private float scrollBarChildOffset;
private StyleProp<float> scrollBarOffset;
private float lastScrollOffset;
private bool childrenDirtyForScroll;
/// <summary>
/// Creates a new panel with the given settings.
@ -157,8 +158,16 @@ namespace MLEM.Ui.Elements {
// when removing children, our scroll bar might have to be hidden
// if we don't do this before adding children again, they might incorrectly assume that the scroll bar will still be visible and adjust their size accordingly
if (this.System != null)
this.childrenDirtyForScroll = true;
}
/// <inheritdoc />
public override T AddChild<T>(T element, int index = -1) {
// if children were recently removed, make sure to update the scroll bar before adding new ones so that they can't incorrectly assume the scroll bar will be visible
if (this.childrenDirtyForScroll && this.System != null)
this.ScrollSetup();
return base.AddChild(element, index);
}
/// <inheritdoc />
@ -277,6 +286,8 @@ namespace MLEM.Ui.Elements {
/// Prepares the panel for auto-scrolling, creating the render target and setting up the scroll bar's maximum value.
/// </summary>
protected virtual void ScrollSetup() {
this.childrenDirtyForScroll = false;
if (!this.scrollOverflow || this.IsHidden)
return;