//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Событие возникает, когда данные сбрасываются над объектом-приемником; по умолчанию это происходит
/// при отпускании кнопки мыши
/// </summary>
/// <param name="sender">Источник события</param>
/// <param name="args">Аргументы события</param>
//---------------------------------------------------------------------------------------------------------
private void OnTreeView_Drop(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)
{
if (DropModelOverCollectionModel(model, over_item, args))
{
}
else
{
if (DropModelOverModel(model, over_item, args))
{
}
else
{
}
}
}
}
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Перемещение курсора мыши
/// </summary>
/// <param name="sender">Источник события</param>
/// <param name="args">Аргументы события</param>
//---------------------------------------------------------------------------------------------------------
private void OnTreeView_PreviewMouseMove(Object sender, MouseEventArgs args)
{
// Получаем позицию курсора
Point mouse_pos = args.GetPosition(treeExplorer);
Vector diff = mDragLastMouseDown - mouse_pos;
// Проверяем смещение
if (AllowDrop && args.LeftButton == MouseButtonState.Pressed &&
(Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
// Получаем визуальный элемент
TreeViewItem drag_tree_view_item = ((DependencyObject)args.OriginalSource).FindVisualParent <TreeViewItem>();
if (drag_tree_view_item == null)
{
return;
}
IsDragging = true;
// Получаем данные
ICubeXModel model = drag_tree_view_item.DataContext as ICubeXModel;
DraggedModel = model;
// Если модель поддерживает
if (model is ICubeXUIModelSupportExplore)
{
ICubeXUIModelSupportExplore model_support_explore = model as ICubeXUIModelSupportExplore;
if (model_support_explore.IsDraggableModel == false)
{
return;
}
}
var drag_data = new DataObject(nameof(ICubeXModel), model);
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
// Копируем
DragDrop.DoDragDrop(drag_tree_view_item, drag_data, DragDropEffects.Copy);
}
else
{
// Переносим
DragDrop.DoDragDrop(drag_tree_view_item, drag_data, DragDropEffects.Move);
}
}
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Установка свойств по группированию
/// </summary>
/// <param name="model">Модель</param>
/// <param name="over">Другой элемент</param>
//---------------------------------------------------------------------------------------------------------
public void SetGroupProperties(ICubeXModel model, ICubeXModel over)
{
if (mIsGroupHierarchy)
{
if (over != null)
{
if (over is ICubeXModelOwned)
{
if (model is ICubeXModelOwned)
{
ICubeXModelOwned model_owned = model as ICubeXModelOwned;
ICubeXModelOwned over_owned = over as ICubeXModelOwned;
model_owned.SetPropertyValueFromGroupingHierarchy(over_owned.GetGroupingFromHierarchyOfOwner());
}
}
}
else
{
}
}
}
//---------------------------------------------------------------------------------------------------------
/// <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;
}
}
}
}
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Отпускания левой кнопки мыши
/// </summary>
/// <param name="sender">Источник события</param>
/// <param name="args">Аргументы события</param>
//---------------------------------------------------------------------------------------------------------
private void OnTreeView_PreviewMouseLeftButtonUp(Object sender, MouseButtonEventArgs args)
{
IsDragging = false;
DraggedModel = null;
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Бросание модели над другой моделью
/// </summary>
/// <param name="model">Модель</param>
/// <param name="item">Модель</param>
/// <param name="args">Аргументы события</param>
/// <returns>Статус обработки события</returns>
//---------------------------------------------------------------------------------------------------------
public Boolean DropModelOverModel(ICubeXModel model, TreeViewItem item, DragEventArgs args)
{
// Элемент находится над моделей
ICubeXModelOwned model_over = item.DataContext as ICubeXModelOwned;
if (model_over != null)
{
// Сначала проверяем возможность вставки в конкретное место
ICubeXCollectionSupportInsert operation_insert = model_over.IOwner as ICubeXCollectionSupportInsert;
if (operation_insert != null && operation_insert.IsSupportModel(model as ICubeXModelOwned))
{
if (args.Effects == DragDropEffects.Move)
{
ICubeXModelOwned model_owned = model as ICubeXModelOwned;
SetGroupProperties(model_owned, model_over);
operation_insert.InsertAfterModel(model_over, model_owned);
}
else
{
if (args.Effects == DragDropEffects.Copy)
{
ICubeXModelOwned model_owned = model.Clone() as ICubeXModelOwned;
SetGroupProperties(model_owned, model_over);
operation_insert.InsertAfterModel(model_over, model_owned);
}
}
}
else
{
// Проверяем возможность простого добавления
ICubeXCollectionSupportAdd operation_add = model_over.IOwner as ICubeXCollectionSupportAdd;
if (operation_add != null && operation_add.IsSupportModel(model as ICubeXModelOwned))
{
if (args.Effects == DragDropEffects.Move)
{
ICubeXModelOwned model_owned = model as ICubeXModelOwned;
SetGroupProperties(model_owned, model_over);
operation_add.AddExistingModel(model_owned);
}
else
{
if (args.Effects == DragDropEffects.Copy)
{
ICubeXModelOwned model_owned = model.Clone() as ICubeXModelOwned;
SetGroupProperties(model_owned, model_over);
operation_add.AddExistingModel(model_owned);
}
}
}
}
}
return(false);
}
