Logical tree helpers

Extension methods for the logical tree (conceptual parent-child as defined in XAML).

using Avalonia.HeadlessTestingFramework;

// Find in logical tree
Button? button = root.FindFirstLogical<Button>();
IEnumerable<TextBox> textBoxes = root.FindAllLogical<TextBox>();

// Find by name in logical tree
Control? ctrl = root.FindLogicalByName("myControl");
Button? btn = root.FindLogicalByName<Button>("submitBtn");

// Find logical parent
StackPanel? parent = button.FindLogicalAncestor<StackPanel>();

// Get logical path
string path = control.GetLogicalPathString();

// Check logical ancestry
bool isLogicalChild = control.GetLogicalAncestors<Control>().Contains(parent);

// Get logical children count
int childCount = panel.GetLogicalChildCount();

// Iterate logical children
foreach (var child in panel.GetLogicalChildren<Control>())
{
    // Process child
}