void selectedEntry_DragMoved(object sender, MouseEventArgs e)
{
VideoPanelEntry entry = sender as VideoPanelEntry;
IEnumerable <UIElement> hitTestResult = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition((Application.Current.RootVisual as Page).VideoArea), (Application.Current.RootVisual as Page).VideoArea);
bool _foundVideoPanelEntry = false;
foreach (UIElement hitElement in hitTestResult)
{
if ((!_foundVideoPanelEntry) && (hitElement.Equals(entry)))
{
_foundVideoPanelEntry = true;
}
else
{
if (hitElement.Equals(this))
{
entry.DragAndDropState = VideoPanelEntryDragAndDropState.NoDrop;
break;
}
if (hitElement is VideoPlayer)
{
entry.DragAndDropState = VideoPanelEntryDragAndDropState.Move;
break;
}
// if we get to the VideoArea Canvas, then nothing else was hit
if (hitElement.Equals((Application.Current.RootVisual as Page).VideoArea))
{
entry.DragAndDropState = VideoPanelEntryDragAndDropState.Add;
break;
}
}
}
}
private void AddEntry(VideoPanelEntry newEntry)
{
newEntry.DragStarted += new EventHandler(newEntry_DragStarted);
Canvas.SetLeft(newEntry, Math.Max(this.Width, entryContainer.Children.Count * (100 + SpaceBetweenEntries)));
entryContainer.Children.Add(newEntry);
UpdateLayoutInternal();
}
void newEntry_DragStarted(object sender, EventArgs e)
{
VideoPanelEntry selectedEntry = sender as VideoPanelEntry;
GeneralTransform transform = selectedEntry.TransformToVisual((Application.Current.RootVisual as Page).VideoArea);
Point newOffset = transform.Transform(new Point(0, 0));
entryContainer.Children.Remove(selectedEntry);
selectedEntry.DragStarted -= newEntry_DragStarted;
selectedEntry.DragMoved += new MouseEventHandler(selectedEntry_DragMoved);
selectedEntry.Dropped += new MouseButtonEventHandler(selectedEntry_Dropped);
(Application.Current.RootVisual as Page).VideoArea.Children.Add(selectedEntry);
Canvas.SetLeft(selectedEntry, newOffset.X);
Canvas.SetTop(selectedEntry, newOffset.Y);
UpdateLayoutInternal();
}
void selectedEntry_Dropped(object sender, MouseButtonEventArgs e)
{
VideoPanelEntry entry = sender as VideoPanelEntry;
IEnumerable <UIElement> hitTestResult = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition((Application.Current.RootVisual as Page).VideoArea), (Application.Current.RootVisual as Page).VideoArea);
bool _foundVideoPanelEntry = false;
foreach (UIElement hitElement in hitTestResult)
{
if ((!_foundVideoPanelEntry) && (hitElement.Equals(entry)))
{
_foundVideoPanelEntry = true;
}
else
{
if (hitElement.Equals(this))
{
break;
}
if (hitElement is VideoPlayer)
{
(hitElement as VideoPlayer).Source = entry.VideoUri;
break;
}
// if we get to the VideoArea Canvas, then nothing else was hit
if (hitElement.Equals((Application.Current.RootVisual as Page).VideoArea))
{
if (EntryDropped != null)
{
EntryDropped(this, new VideoPanelEventArgs(entry.VideoUri, e));
}
break;
}
}
}
(Application.Current.RootVisual as Page).VideoArea.Children.Remove(entry);
}
