using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Microsoft.Surface.Presentation.Controls;

using Microsoft.Surface.Presentation;

using FingersDance.Views;

namespace FingersDance.Views

{

    /// <summary>

    /// Interaction logic for TimelineView.xaml

    /// </summary>

    public partial class TimelineView : UserControl

    {

        public TimelineView()

        {

            InitializeComponent();

        }

        private void listview_PreviewContactDown(object sender, Microsoft.Surface.Presentation.ContactEventArgs e)

        {

            FrameworkElement findSource = e.OriginalSource as FrameworkElement;

            SurfaceListBoxItem draggedElement = null;

            // Find the touched SurfaceListBoxItem object.

            while (draggedElement == null && findSource != null)

            {

                if ((draggedElement = findSource as SurfaceListBoxItem) == null)

                {

                    findSource = VisualTreeHelper.GetParent(findSource) as FrameworkElement;

                }

            }

            if (draggedElement == null)

            {

                return;

            }

            // Create the cursor visual.

            ContentControl cursorVisual = new ContentControl()

            {

                Content = new TimelineAnnotationView()

                {

                    DataContext = findSource.DataContext

                }

            };

            // We apply the current scale to the dragged annotation

            ((TimelineAnnotationView)cursorVisual.Content).RenderTransform = this.RenderTransform;

            // Add a handler. This will enable the application to change the visual cues.

            //SurfaceDragDrop.AddTargetChangedHandler(cursorVisual, OnTargetChanged);

            // Create a list of input devices. Add the contacts that

            // are currently captured within the dragged element and

            // the current contact (if it isn't already in the list).

            List<InputDevice> devices = new List<InputDevice>();

            devices.Add(e.Contact);

            foreach (Contact contact in draggedElement.ContactsCapturedWithin)

            {

                if (contact != e.Contact)

                {

                    devices.Add(contact);

                }

            }

            // Get the drag source object

            ItemsControl dragSource = ItemsControl.ItemsControlFromItemContainer(draggedElement);

            bool startDragOkay =

                SurfaceDragDrop.BeginDragDrop(

                  dragSource,                 // The SurfaceListBox object that the cursor is dragged out from.

                  draggedElement,             // The SurfaceListBoxItem object that is dragged from the drag source.

                  cursorVisual,               // The visual element of the cursor.

                  draggedElement.DataContext, // The data associated with the cursor.

                  devices,                    // The input devices that start dragging the cursor.

                  DragDropEffects.Move);      // The allowed drag-and-drop effects of the operation.

            // If the drag began successfully, set e.Handled to true. 

            // Otherwise SurfaceListBoxItem captures the contact 

            // and causes the drag operation to fail.

            e.Handled = startDragOkay;

        }

    }

}