void OnPointerReleased(object sender, PointerEventArgs e)
{
if (!e.CurrentPoint.IsLeftButtonPressed)
{
AssociatedElement.ReleaseCapture();
}
}
private void Center()
{
if (content != null && AssociatedElement.ExtentWidth > 0 && AssociatedElement.ExtentHeight > 0 && AssociatedElement.ActualWidth > 0 && AssociatedElement.ActualHeight > 0)
{
AssociatedElement.CenterViewport();
}
}
/// <summary>
/// Called after the behavior is attached to an AssociatedObject.
/// </summary>
/// <remarks>Override this to hook up functionality to the AssociatedObject.</remarks>
protected override void OnAttached()
{
callbackToken = AssociatedElement.RegisterPropertyChangedCallback(ContentControl.ContentProperty, ContentChanged);
Initialize();
Center();
}
void OnTap(object sender, PointerEventArgs e)
{
var sb = new StringBuilder();
sb.AppendLine(string.Format("{0} '{1}'", AssociatedElement.GetType(), AssociatedElement.Name));
sb.AppendLine(string.Format("\tPosition: ({0}, {1})", AssociatedElement.Position.X, AssociatedElement.Position.Y));
LogEvent.UserInterface.Info(sb.ToString());
}
void OnPointerPressed(object sender, PointerEventArgs e)
{
if (e.CurrentPoint.IsLeftButtonPressed)
{
offset = new Vector3(e.CurrentPoint.Position, 0) - AssociatedElement.AbsolutePosition;
AssociatedElement.CapturePointer();
}
}
private void AssociatedElement_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
{
scrollViewer = AssociatedElement.FindParent <ScrollViewer>();
if (movingOperation != null)
{
movingOperation.Cancel();
movingOperation = null;
}
if (scrollViewer != null)
{
movingOperation = AcquireOperation(e.Position.ToVector2());
}
}
private NodeMovingOperation AcquireOperation(Vector2 position)
{
var mindmap = AssociatedElement.FindParent <Mindmap>();
if (mindmap?.Renderer == null)
{
return(null);
}
var result = mindmap.Renderer.HitTest(position);
if (result != null && result.RenderNode != mindmap.TextEditingNode)
{
return(NodeMovingOperation.Start(mindmap, result.RenderNode));
}
return(null);
}
protected override void Scroll()
{
if (AssociatedElement != null && ItemInView != null)
{
var list = AssociatedElement.ItemsSource as IList;
if (list != null && list.IndexOf(ItemInView) != -1)
{
this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
if (ItemInView != null)
{
AssociatedElement.ScrollIntoView(ItemInView, ScrollIntoViewAlignment.Leading);
ItemInView = null;
}
});
}
}
else
{
base.Scroll();
}
}
private void ScrollViewerBringIntoViewBehavior_GotFocus(object sender, RoutedEventArgs e)
{
var parent = AssociatedObject.FindParent <ScrollViewer>();
if (parent == null)
{
return;
}
var visibleBounds = AssociatedElement.TransformToVisual(Window.Current.Content).TransformBounds(new Rect(new Point(0, 0), AssociatedElement.RenderSize));
if (AssociatedElement.RenderSize.Width < parent.RenderSize.Width && AssociatedElement.RenderSize.Height < parent.RenderSize.Height)
{
double dx = 0;
double dy = 0;
if (visibleBounds.Left < 0)
{
dx = visibleBounds.Left;
}
else if (visibleBounds.Right > parent.RenderSize.Width)
{
dx = visibleBounds.Right - parent.RenderSize.Width;
}
if (visibleBounds.Top < 0)
{
dy = visibleBounds.Top;
}
else if (visibleBounds.Bottom > parent.RenderSize.Height)
{
dy = visibleBounds.Bottom - parent.RenderSize.Height;
}
parent.ChangeView(parent.VerticalOffset + dy, parent.HorizontalOffset + dx, null, false);
}
}
protected override void ElementAttached()
{
base.ElementAttached();
_watcher = AssociatedElement.WatchProperty(PropertyName, OnPropertyChanged);
}
/// <summary>
/// Called when the behavior is being detached from its AssociatedObject, but before it has actually occurred.
/// </summary>
/// <remarks>Override this to unhook functionality from the AssociatedObject.</remarks>
protected override void OnDetaching()
{
AssociatedElement.UnregisterPropertyChangedCallback(ContentControl.ContentProperty, callbackToken);
Release();
}
private void InputPane_Showing(InputPane sender, InputPaneVisibilityEventArgs args)
{
AssociatedElement.BringChildElementIntoView(args);
}
