/// <summary>
/// Initializes a new instance of the <see cref="DropInfo"/> class.
/// </summary>
/// <param name="sender">
/// The sender of the drag event.
/// </param>
/// <param name="e">
/// The drag event
/// </param>
public DropInfo(object sender, DragEventArgs e)
{
var dataFormat = FrameworkElementDragBehavior.DataFormat.Name;
this.Payload = e.Data.GetDataPresent(dataFormat) ? e.Data.GetData(dataFormat) : e.Data;
this.KeyStates = e.KeyStates;
this.Effects = e.Effects;
this.VisualTarget = sender as UIElement;
this.DropPosition = e.GetPosition(this.VisualTarget);
var control = sender as Control;
this.TargetGroup = VisualTreeExtensions.FindGroup(control, this.DropPosition);
var gridcontrol = sender as GridControl;
if (gridcontrol != null)
{
this.SetTargetItem(gridcontrol, e);
}
var treeListControl = sender as TreeListControl;
if (treeListControl != null)
{
this.SetTargetItem(treeListControl, e);
}
var itemsControl = sender as ItemsControl;
if (itemsControl != null)
{
this.SetTargetItem(itemsControl);
}
}
/// <summary>
/// Event handler for the <see cref="MouseLeftButtonDown"/> event
/// </summary>
/// <remarks>
/// Occurs when the left mouse button is pressed while the mouse pointer is over this element.
/// </remarks>
/// <param name="sender">the sender of the event</param>
/// <param name="e">the <see cref="MouseButtonEventArgs"/> associated to the event</param>
private void MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (e.ClickCount != 1 || VisualTreeExtensions.HitTestScrollBar(sender, e) ||
VisualTreeExtensions.HitTestGridColumnHeader(sender, e))
{
this.dragInfo = null;
return;
}
this.dragInfo = new DragInfo(sender, e);
}
/// <summary>
/// Sets the <see cref="TargetItem"/> to the item that the mouse is over.
/// </summary>
/// <param name="itemsControl">
/// The <see cref="ItemsControl"/> that the mouse is moving over
/// </param>
private void SetTargetItem(ItemsControl itemsControl)
{
var item = VisualTreeExtensions.GetItemContainerAt(itemsControl, this.DropPosition);
if (item != null)
{
this.VisualTargetOrientation = VisualTreeExtensions.GetItemsPanelOrientation(itemsControl);
var itemParent = ItemsControl.ItemsControlFromItemContainer(item);
this.TargetItem = itemParent.ItemContainerGenerator.ItemFromContainer(item);
}
}
