public void AddChild(TreeItem item)
{
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (item.Parent != null)
{
throw new InvalidOperationException();
}
_items.Add(item);
item.Parent = this;
}
/// <summary>
/// The draw tree item.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="layout">
/// The layout.
/// </param>
/// <param name="treeItem">
/// The tree item.
/// </param>
public void DrawTreeItem(IRenderContext context, Rectangle layout, TreeItem treeItem)
{
if (treeItem.Parent is TreeView)
{
var view = treeItem.Parent as TreeView;
if (view.SelectedItem == treeItem)
{
this.DrawRaised(context, layout);
}
}
this.m_RenderUtilities.RenderText(
context,
new Vector2(layout.X + 5, layout.Center.Y),
treeItem.Text,
this.m_AssetManager.Get<FontAsset>("font.Default"),
verticalAlignment: VerticalAlignment.Center);
}
/// <summary>
/// The find parent for item.
/// </summary>
/// <param name="current">
/// The current.
/// </param>
/// <param name="item">
/// The item.
/// </param>
/// <returns>
/// The <see cref="TreeEntry"/>.
/// </returns>
private TreeEntry FindParentForItem(TreeEntry current, TreeItem item)
{
var segments = item.Text == null ? -1 : item.Text.Split('.').Length;
if (current.SegmentCount == segments - 1 && item.Text.StartsWith(current.FullName))
{
return current;
}
foreach (var child in current.Children)
{
var result = this.FindParentForItem(child, item);
if (result != null)
{
return result;
}
}
return null;
}
/// <summary>
/// The backfill parents for item.
/// </summary>
/// <param name="root">
/// The root.
/// </param>
/// <param name="item">
/// The item.
/// </param>
private void BackfillParentsForItem(TreeEntry root, TreeItem item)
{
var segments = item.Text.Split('.').Reverse().Where((x, id) => id >= 1).Reverse().ToArray();
var current = root;
var i = 1;
var built = string.Empty;
foreach (var segment in segments)
{
built += "." + segment;
built = built.Trim('.');
var next = current.Children.FirstOrDefault(x => x.Name == segment);
if (next == null)
{
var newItem = new TreeItem { Text = built, Parent = this };
this.m_Items.Add(newItem);
var created = new TreeEntry
{
Item = newItem,
Layout = null,
Name = segment,
FullName = built,
Children = new List<TreeEntry>(),
SegmentCount = i
};
current.Children.Add(created);
current = created;
}
else
{
current = next;
}
i++;
}
}
/// <summary>
/// The remove child.
/// </summary>
/// <param name="item">
/// The item.
/// </param>
public void RemoveChild(TreeItem item)
{
this.m_Items.Remove(item);
item.Parent = null;
}
/// <summary>
/// Requests that the UI container handle the specified event or return false.
/// </summary>
/// <param name="skin">
/// The UI skin.
/// </param>
/// <param name="layout">
/// The layout for the element.
/// </param>
/// <param name="context">
/// The current game context.
/// </param>
/// <param name="event">
/// The event that was raised.
/// </param>
/// <returns>
/// Whether or not this UI element handled the event.
/// </returns>
public bool HandleEvent(ISkin skin, Rectangle layout, IGameContext context, Event @event)
{
foreach (var kv in this.GetChildrenWithLayouts(skin, layout))
{
if (kv.Item.HandleEvent(skin, kv.Layout.Value, context, @event))
{
return true;
}
}
var keyPressEvent = @event as KeyPressEvent;
if (keyPressEvent != null)
{
var upPressed = keyPressEvent.Key == Keys.Up;
var downPressed = keyPressEvent.Key == Keys.Down;
if (this.SelectedItem != null && (upPressed || downPressed))
{
var tree = this.BuildEntryGraph(layout);
var list = this.NormalizeTree(tree, true);
var current = list.IndexOf(list.First(x => this.SelectedItem == x.Item));
if (upPressed)
{
current -= 1;
}
else if (downPressed)
{
current += 1;
}
if (current >= 0 && current < list.Count)
{
this.SelectedItem = list[current].Item;
return true;
}
}
}
return false;
}
public void DrawTreeItem(IRenderContext context, Rectangle layout, TreeItem treeItem)
{
this.m_BasicSkin.DrawTreeItem(context, layout, treeItem);
}