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further panel performance improvements

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Ell 2023-11-11 13:02:18 +01:00
parent 5fcee515e2
commit 56a4833a49
4 changed files with 17 additions and 15 deletions
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1
CHANGELOG.md
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@ -35,7 +35,6 @@ Additions
Improvements
- Allow scrolling panels to contain other scrolling panels
- Allow dropdowns to have scrolling panels
- Don't unnecessarily set areas dirty when removing a root element from the ui
- Improved Panel performance when adding and removing a lot of children
Fixes

2
MLEM.Ui/Elements/Element.cs
View file

@ -591,6 +591,7 @@ namespace MLEM.Ui.Elements {
element.AndChildren(e => e.AddedToUi(this.System, this.Root));
this.OnChildAdded?.Invoke(this, element);
this.SetSortedChildrenDirty();
element.SetAreaDirty();
return element;
}
@ -1341,7 +1342,6 @@ namespace MLEM.Ui.Elements {
protected internal virtual void AddedToUi(UiSystem system, RootElement root) {
this.Root = root;
this.System = system;
this.SetAreaDirty();
this.OnAddedToUi?.Invoke(this);
root?.InvokeOnElementAdded(this);
}

12
MLEM.Ui/Elements/Panel.cs
View file

@ -245,12 +245,11 @@ namespace MLEM.Ui.Elements {
/// <inheritdoc />
protected override void OnChildAreaDirty(Element child, bool grandchild) {
base.OnChildAreaDirty(child, grandchild);
if (grandchild && !this.AreaDirty) {
// we only need to scroll when a grandchild changes, since all of our children are forced
// to be auto-anchored and so will automatically propagate their changes up to us
if (grandchild) {
this.ScrollChildren();
// we also need to re-setup here in case the child is involved in a special GetTotalCoveredArea
if (!this.AreaDirty)
this.ScrollSetup();
}
}
@ -358,17 +357,16 @@ namespace MLEM.Ui.Elements {
if (!this.scrollOverflow)
return;
// we ignore false grandchildren so that the children of the scroll bar stay in place
var currentChildren = new HashSet<Element>(this.GetChildren(c => c != this.ScrollBar, true, true));
var currentChildren = new HashSet<Element>();
// scroll all our children (and cache newly added ones)
foreach (var child in currentChildren) {
// we ignore false grandchildren so that the children of the scroll bar stay in place
foreach (var child in this.GetChildren(c => c != this.ScrollBar, true, true)) {
// if a child was newly added later, the last scroll offset was never applied
if (this.scrolledChildren.Add(child))
child.ScrollOffset.Y -= this.lastScrollOffset;
child.ScrollOffset.Y += (this.lastScrollOffset - this.ScrollBar.CurrentValue);
currentChildren.Add(child);
}
// remove cached scrolled children that aren't our children anymore
this.scrolledChildren.IntersectWith(currentChildren);

11
MLEM.Ui/UiSystem.cs
View file

@ -351,7 +351,10 @@ namespace MLEM.Ui {
return null;
var root = new RootElement(name, element, this);
this.rootElements.Add(root);
root.Element.AndChildren(e => e.AddedToUi(this, root));
root.Element.AndChildren(e => {
e.AddedToUi(this, root);
e.SetAreaDirty();
});
this.OnRootAdded?.Invoke(root);
root.InvokeOnAddedToUi(this);
this.SortRoots();
@ -368,8 +371,10 @@ namespace MLEM.Ui {
return;
this.rootElements.Remove(root);
this.Controls.SelectElement(root, null);
// we don't need to set dirty here since re-adding to a ui will cause dirty state anyway
root.Element.AndChildren(e => e.RemovedFromUi());
root.Element.AndChildren(e => {
e.RemovedFromUi();
e.SetAreaDirty();
});
this.OnRootRemoved?.Invoke(root);
root.InvokeOnRemovedFromUi(this);
}