//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Бросание модели над коллекцией моделей
/// </summary>
/// <param name="model">Модель</param>
/// <param name="item">Коллекция</param>
/// <param name="args">Аргументы события</param>
/// <returns>Статус обработки события</returns>
//---------------------------------------------------------------------------------------------------------
public Boolean DropModelOverCollectionModel(ICubeXModel model, TreeViewItem item, DragEventArgs args)
{
ICubeXCollectionModel collection_model = item.DataContext as ICubeXCollectionModel;
// Если коллекция поддерживает данную модель
if (collection_model != null && collection_model.IsSupportModel(model as ICubeXModelOwned))
{
// Проверка на поддержку операции добавления
ICubeXCollectionSupportAdd operation_add = item.DataContext as ICubeXCollectionSupportAdd;
if (operation_add != null)
{
if (args.Effects == DragDropEffects.Move)
{
ICubeXModelOwned model_owned = model as ICubeXModelOwned;
SetGroupProperties(model_owned, operation_add.IModels[0] as ICubeXModelOwned);
operation_add.AddExistingModel(model_owned);
}
else
{
if (args.Effects == DragDropEffects.Copy)
{
ICubeXModelOwned model_owned = model.Clone() as ICubeXModelOwned;
SetGroupProperties(model_owned, operation_add.IModels[0] as ICubeXModelOwned);
operation_add.AddExistingModel(model_owned);
}
}
}
return(true);
}
return(false);
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Событие постоянно возникает при перетаскивании данных над объектом-приемником
/// </summary>
/// <param name="sender">Источник события</param>
/// <param name="args">Аргументы события</param>
//---------------------------------------------------------------------------------------------------------
private void OnTreeView_DragOver(Object sender, DragEventArgs args)
{
if (args.Data.GetDataPresent(nameof(ICubeXModel)))
{
ICubeXModel model = args.Data.GetData(nameof(ICubeXModel)) as ICubeXModel;
// Над этим элементом находится перетаскиваемый объект
TreeViewItem over_item = ((DependencyObject)args.OriginalSource).FindVisualParent <TreeViewItem>();
if (over_item != null)
{
ICubeXCollectionModel collection_model = over_item.DataContext as ICubeXCollectionModel;
if (collection_model != null && collection_model.IsSupportModel(model as ICubeXModelOwned))
{
}
else
{
ICubeXModelOwned model_owned = over_item.DataContext as ICubeXModelOwned;
if (model_owned != null)
{
ICubeXCollectionModel model_owned_collection = model_owned.IOwner;
if (model_owned_collection != null && model_owned_collection.IsSupportModel(model as ICubeXModelOwned))
{
}
else
{
args.Effects = DragDropEffects.None;
}
}
else
{
args.Effects = DragDropEffects.None;
}
}
}
}
}