/// <summary>
/// Dropイベント
/// </summary>
/// <param name="args"></param>
private void Description_DragDrop(System.Windows.DragEventArgs args)
{
if (args.Data.GetDataPresent(typeof(ContentModel)))
{
// Drop item
var data = args.Data.GetData(typeof(ContentModel)) as ContentModel;
// EventArgsからDrop先のFrameworkElementを取得
var feDest = args.Source as System.Windows.Controls.ListBox;
// EventArgsからDrop先のバインドオブジェクトを取得
var bindDest = BindingOperations.GetBinding(
(args.Source as System.Windows.Controls.ListBox), System.Windows.Controls.ListBox.ItemsSourceProperty).Path.Path;
// Drop元のバインドオブジェクトを取得
var dragFromTheme = ThemeList.Any(item => item.ContentList.Contains(data));
var dragFromFree = ContentFreeList.Contains(data);
// Drop元とDrop先のチェック
if (bindDest == nameof(ThemeList))
{
if (dragFromFree)
{
Point position = args.GetPosition(args.OriginalSource as IInputElement);
//System.Windows.Media.VisualTreeHelper.HitTest(
// this
// , null
// , new System.Windows.Media.HitTestResultCallback(OnHitTestResultCallback)
// , new System.Windows.Media.PointHitTestParameters(position));
// Drop Index
//var targetContainer = GuiUtils.GetTemplatedRootElement(args.OriginalSource as FrameworkElement);
//var targetContainer2 = GuiUtils.FindAncestor<System.Windows.Controls.ListBox>(args.OriginalSource as FrameworkElement);
var index = ThemeList.IndexOf(DropTarget);
index = index < 0 ? feDest.Items.Count - 1 : index;
//var datas =
ThemeList[index].ContentList.Add(data);
ContentFreeList.Remove(data);
}
else if (dragFromTheme)
{
return;
}
}
else if (bindDest == nameof(ContentFreeList))
{
if (dragFromFree)
{
// Drop Index
var targetContainer = GuiUtils.GetTemplatedRootElement(args.OriginalSource as FrameworkElement);
var index = feDest.ItemContainerGenerator.IndexFromContainer(targetContainer);
index = index < 0 ? feDest.Items.Count - 1 : index;
// Collectionに反映
var ocDest = this[bindDest] as ObservableCollection <ContentModel>;
ocDest.Move(feDest.SelectedIndex, index);
}
else if (dragFromTheme)
{
// Drop Index
var index = ThemeList
.Select((thm, i) => new { Theme = thm, Index = i })
.Where(item => item.Theme.ContentList.Contains(data))
.Select(item => item.Index).FirstOrDefault();
// Collectionに反映
ContentFreeList.Add(data);
ThemeList[index].ContentList.Remove(data);
}
}
return;
}
if (args.Data.GetDataPresent(typeof(ThemeModel)))
{
return;
}
}