private bool SelectBy(int delta)
{
var list = GetSelectionList();
var selection = GetSelectedElement(list);
if (selection != null)
{
var index = list.IndexOf(selection);
var nextIndex = index + delta;
if (nextIndex >= list.Count)
{
return(false);
}
if (nextIndex < 0)
{
return(false);
}
var nextElement = list.ElementAt(nextIndex);
Selection.SetSelection(nextElement.TargetVersion);
foreach (var scrollView in UIUtils.GetParentsOfType <ScrollView>(nextElement.Element))
{
UIUtils.ScrollIfNeeded(scrollView, nextElement.Element);
}
}
return(true);
}
private void ScrollIfNeeded(ScrollView container = null, VisualElement target = null)
{
container = container ?? scrollView;
target = target ?? GetSelectedItem()?.element;
if (container == null || target == null)
{
return;
}
if (float.IsNaN(target.layout.height))
{
EditorApplication.delayCall += () => ScrollIfNeeded(container, target);
return;
}
IPackage package;
IPackageVersion version;
PageManager.instance.GetSelectedPackageAndVersion(out package, out version);
var packageSelectionObject = PageManager.instance.CreatePackageSelectionObject(package, version);
if (packageSelectionObject != null && Selection.activeObject != packageSelectionObject)
{
Selection.activeObject = packageSelectionObject;
}
var scrollViews = UIUtils.GetParentsOfType <ScrollView>(target);
foreach (var sv in scrollViews)
{
UIUtils.ScrollIfNeeded(sv, target);
target = sv;
}
}
private void ScrollIfNeeded(ScrollView container = null, VisualElement target = null)
{
container = container ?? scrollView;
target = target ?? GetSelectedItem()?.element;
if (container == null || target == null)
{
return;
}
if (float.IsNaN(target.layout.height))
{
EditorApplication.delayCall += () => ScrollIfNeeded(container, target);
return;
}
UIUtils.ScrollIfNeeded(container, target);
}
private void ScrollIfNeeded(ScrollView container = null, VisualElement target = null)
{
container = container ?? scrollView;
target = target ?? GetSelectedItem()?.element;
if (container == null || target == null)
{
return;
}
if (float.IsNaN(target.layout.height))
{
EditorApplication.delayCall += () => ScrollIfNeeded(container, target);
return;
}
var scrollViews = UIUtils.GetParentsOfType <ScrollView>(target);
foreach (var scrollview in scrollViews)
{
UIUtils.ScrollIfNeeded(scrollview, target);
}
}
private void ScrollIfNeeded(VisualElement target = null)
{
EditorApplication.delayCall -= ScrollIfNeededDelayed;
UIUtils.ScrollIfNeeded(List, target);
}
