protected override void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
{
editor.EditorScrolled -= Editor_EditorScrolled;
editor.CaretChangedByPointerClick -= Editor_CaretChangedByPointerClick;
editor = null;
editorViewModel = null;
disposables.Dispose();
}
protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
editor = this.Find<TextEditor.TextEditor>("editor");
editor.CaretChangedByPointerClick += Editor_CaretChangedByPointerClick;
editor.EditorScrolled += Editor_EditorScrolled;
editorViewModel = DataContext as EditorViewModel;
if (editorViewModel != null && editor != null)
{
editorViewModel.Model.Editor = editor;
editor.Focus();
}
}
/// <summary>
/// Calls the <see cref="OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs)"/> method
/// for this control and all of its visual descendents.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromVisualTreeCore(VisualTreeAttachmentEventArgs e)
{
Logger.Verbose(LogArea.Visual, this, "Detached from visual tree");
_visualRoot = null;
if (RenderTransform != null)
{
RenderTransform.Changed -= RenderTransformChanged;
}
OnDetachedFromVisualTree(e);
e.Root?.Renderer?.AddDirty(this);
if (VisualChildren != null)
{
foreach (Visual child in VisualChildren.OfType <Visual>())
{
child.OnDetachedFromVisualTreeCore(e);
}
}
}
/// <summary>
/// Calls the <see cref="OnAttachedToVisualTree(VisualTreeAttachmentEventArgs)"/> method
/// for this control and all of its visual descendents.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnAttachedToVisualTreeCore(VisualTreeAttachmentEventArgs e)
{
Logger.Verbose(LogArea.Visual, this, "Attached to visual tree");
_visualRoot = e.Root;
if (RenderTransform != null)
{
RenderTransform.Changed += RenderTransformChanged;
}
OnAttachedToVisualTree(e);
InvalidateVisual();
if (VisualChildren != null)
{
foreach (Visual child in VisualChildren.OfType <Visual>())
{
child.OnAttachedToVisualTreeCore(e);
}
}
}
/// <summary>
/// Called when the control is removed from a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
{
}
/// <summary>
/// Called when the control is added to a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
}
/// <summary>
/// Called when the control is removed from a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
{
DetachedFromVisualTree?.Invoke(this, e);
}
/// <summary>
/// Called when the control is added to a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
AttachedToVisualTree?.Invoke(this, e);
}
/// <summary>
/// Sets the visual parent of the Visual.
/// </summary>
/// <param name="value">The visual parent.</param>
private void SetVisualParent(Visual value)
{
if (_visualParent == value)
{
return;
}
var old = _visualParent;
_visualParent = value;
if (VisualRoot != null)
{
var e = new VisualTreeAttachmentEventArgs(VisualRoot);
OnDetachedFromVisualTreeCore(e);
}
if (_visualParent is IRenderRoot || _visualParent?.IsAttachedToVisualTree == true)
{
var root = this.GetVisualAncestors().OfType<IRenderRoot>().FirstOrDefault();
var e = new VisualTreeAttachmentEventArgs(root);
OnAttachedToVisualTreeCore(e);
}
OnVisualParentChanged(old, value);
}
/// <summary>
/// Called when the control is removed from a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
{
DetachedFromVisualTree?.Invoke(this, e);
}
/// <summary>
/// Called when the control is added to a visual tree.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
AttachedToVisualTree?.Invoke(this, e);
}
/// <summary>
/// Calls the <see cref="OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs)"/> method
/// for this control and all of its visual descendents.
/// </summary>
/// <param name="e">The event args.</param>
protected virtual void OnDetachedFromVisualTreeCore(VisualTreeAttachmentEventArgs e)
{
Logger.Verbose(LogArea.Visual, this, "Detached from visual tree");
VisualRoot = null;
if (RenderTransform != null)
{
RenderTransform.Changed -= RenderTransformChanged;
}
OnDetachedFromVisualTree(e);
if (VisualChildren != null)
{
foreach (Visual child in VisualChildren.OfType<Visual>())
{
child.OnDetachedFromVisualTreeCore(e);
}
}
}
protected override void OnAttachedToVisualTree(VisualTreeAttachmentEventArgs e)
{
var canScrollHorizontally = this.GetObservable(AcceptsReturnProperty)
.Select(x => !x);
var horizontalScrollBarVisibility = this.GetObservable(AcceptsReturnProperty)
.Select(x => x ? ScrollBarVisibility.Auto : ScrollBarVisibility.Hidden);
disposables.Add(Bind(
ScrollViewer.HorizontalScrollBarVisibilityProperty,
horizontalScrollBarVisibility,
BindingPriority.Style));
disposables.Add(TextDocumentProperty.Changed.Subscribe(_ => { SelectionStart = SelectionEnd = CaretIndex = -1; }));
disposables.Add(this.GetObservable(OffsetProperty).Subscribe(_ =>
{
EditorScrolled?.Invoke(this, new EventArgs());
}));
disposables.Add(AddHandler(KeyDownEvent, OnKeyDown, RoutingStrategies.Bubble));
}
protected override void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
{
TextView = null;
TextDocument = null;
disposables.Dispose();
}