/// <summary>
/// Called when the control is removed from a logical tree.
/// </summary>
/// <param name="e">The event args.</param>
/// <remarks>
/// It is vital that if you override this method you call the base implementation;
/// failing to do so will cause numerous features to not work as expected.
/// </remarks>
protected virtual void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
{
if (Name != null)
{
_nameScope?.Unregister(Name);
}
_isAttachedToLogicalTree = false;
_styleDetach.OnNext(Unit.Default);
this.TemplatedParent = null;
DetachedFromLogicalTree?.Invoke(this, e);
foreach (var child in LogicalChildren.OfType <Control>())
{
child.OnDetachedFromLogicalTree(e);
}
}
/// <summary>
/// Sets the control's logical parent.
/// </summary>
/// <param name="parent">The parent.</param>
void ISetLogicalParent.SetParent(ILogical parent)
{
var old = Parent;
if (parent != old)
{
if (old != null && parent != null)
{
throw new InvalidOperationException("The Control already has a parent.");
}
if (_isAttachedToLogicalTree)
{
var oldRoot = FindStyleRoot(old);
if (oldRoot == null)
{
throw new PerspexInternalException("Was attached to logical tree but cannot find root.");
}
var e = new LogicalTreeAttachmentEventArgs(oldRoot);
OnDetachedFromLogicalTreeCore(e);
}
InheritanceParent = parent as PerspexObject;
_parent = (IControl)parent;
if (_parent is IStyleRoot || _parent?.IsAttachedToLogicalTree == true)
{
var newRoot = FindStyleRoot(this);
if (newRoot == null)
{
throw new PerspexInternalException("Parent is atttached to logical tree but cannot find root.");
}
var e = new LogicalTreeAttachmentEventArgs(newRoot);
OnAttachedToLogicalTreeCore(e);
}
RaisePropertyChanged(ParentProperty, old, _parent, BindingPriority.LocalValue);
}
}
/// <summary>
/// Called when the control is added to a logical tree.
/// </summary>
/// <param name="e">The event args.</param>
/// <remarks>
/// It is vital that if you override this method you call the base implementation;
/// failing to do so will cause numerous features to not work as expected.
/// </remarks>
protected virtual void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
if (_nameScope == null)
{
_nameScope = NameScope.GetNameScope(this) ?? ((Control)Parent)?._nameScope;
}
if (Name != null)
{
_nameScope?.Register(Name, this);
}
_isAttachedToLogicalTree = true;
PerspexLocator.Current.GetService <IStyler>()?.ApplyStyles(this);
AttachedToLogicalTree?.Invoke(this, e);
foreach (var child in LogicalChildren.OfType <Control>())
{
child.OnAttachedToLogicalTree(e);
}
}
protected override void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnDetachedFromLogicalTree(e);
ItemContainerGenerator.Clear();
}
/// <inheritdoc/>
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
_treeView = this.GetLogicalAncestors().OfType <TreeView>().FirstOrDefault();
}
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
InvalidateFormattedText();
}
protected override void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnDetachedFromLogicalTree(e);
ItemContainerGenerator.Clear();
}
/// <inheritdoc/>
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
_treeView = this.GetLogicalAncestors().OfType<TreeView>().FirstOrDefault();
}
/// <summary>
/// Called when the control is removed from a rooted logical tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
{
DetachedFromLogicalTree?.Invoke(this, e);
}
/// <summary>
/// Called when the control is added to a rooted logical tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
AttachedToLogicalTree?.Invoke(this, e);
}
/// <inheritdoc/>
void ILogical.NotifyDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
{
this.OnDetachedFromLogicalTreeCore(e);
}
/// <inheritdoc/>
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
this.UpdateSelectionBoxItem(this.SelectedItem);
}
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
InvalidateFormattedText();
}
/// <inheritdoc/>
protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
{
base.OnAttachedToLogicalTree(e);
this.UpdateSelectionBoxItem(this.SelectedItem);
}
