/// <summary>
/// Handles the PreviewMouseMove event of the ReorderableListBox control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.MouseEventArgs"/> instance containing the event data.</param>
private void OnPreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
if (this.overlayElement != null)
{
this.dragging = true;
Point currentPosition = (Point)e.GetPosition((IInputElement)this);
this.overlayElement.LeftOffset = currentPosition.X;
this.overlayElement.TopOffset = currentPosition.Y;
}
else
{
if (this.SelectedIndex != -1)
{
this.dragging = true;
this.originalItemIndex = this.SelectedIndex;
ListBoxItem listBoxItem = (ListBoxItem)ItemContainerGenerator.ContainerFromIndex(this.originalItemIndex);
this.overlayElement = new DropPreviewAdorner((UIElement)this, listBoxItem);
this.AdornerLayer.Add(this.overlayElement);
}
}
}
}
/// <summary>
/// Handles the PreviewMouseLeftButtonUp event of the ReorderableListBox control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.MouseButtonEventArgs"/> instance containing the event data.</param>
private void OnPreviewMouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
if (this.dragging == true)
{
this.dragging = false;
this.adornerLayer.Remove(this.overlayElement);
this.overlayElement = null;
object originalItem = this.Items[this.originalItemIndex];
RoutedEventArgs routedEventArgs = new RoutedEventArgs(ItemsReorderedEvent, this);
this.RaiseEvent(routedEventArgs);
}
}
