public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
MC.ShellItem itemToAdd = child switch
{
MC.TemplatedPage childAsTemplatedPage => childAsTemplatedPage, // Implicit conversion
MC.ShellContent childAsShellContent => childAsShellContent, // Implicit conversion
MC.ShellSection childAsShellSection => childAsShellSection, // Implicit conversion
MC.MenuItem childAsMenuItem => childAsMenuItem, // Implicit conversion
MC.ShellItem childAsShellItem => childAsShellItem,
_ => throw new NotSupportedException($"Handler of type '{GetType().FullName}' representing element type '{TargetElement?.GetType().FullName ?? "<null>"}' doesn't support adding a child (child type is '{child.GetType().FullName}').")
};
if (ShellControl.Items.Count >= physicalSiblingIndex)
{
ShellControl.Items.Insert(physicalSiblingIndex, itemToAdd);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but ShellControl.Items.Count={ShellControl.Items.Count}");
ShellControl.Items.Add(itemToAdd);
}
}
private MC.ShellItem GetItemForElement(MC.Element child)
{
return(child switch
{
MC.TemplatedPage childAsTemplatedPage => GetItemForTemplatedPage(childAsTemplatedPage),
MC.ShellContent childAsShellContent => GetItemForContent(childAsShellContent),
MC.ShellSection childAsShellSection => GetItemForSection(childAsShellSection),
MC.MenuItem childAsMenuItem => GetItemForMenuItem(childAsMenuItem),
MC.ShellItem childAsShellItem => childAsShellItem,
_ => null
});