internal void HandleDrop(BudgetEditorDragDropHandler dropInfo)
{
if (dropInfo.DragType != BudgetEditorDragTypes.Category)
{
throw new InvalidOperationException();
}
if (this.DataContext is MasterCategoryRowViewModel viewModel)
{
var categoryRow = dropInfo.CategoryRow.DataContext as CategoryRowViewModel;
if (viewModel.MasterCategory.Categories.Contains(categoryRow.Category))
{
categoryRow.Category.SetSortOrder(dropInfo.InsertPosition);
categoryRow.Category.Model.SaveChanges();
}
else
{
viewModel.MasterCategory.Categories.Add(categoryRow.Category);
categoryRow.Category.SetSortOrder(dropInfo.InsertPosition);
categoryRow.Category.Model.SaveChanges();
}
viewModel.Categories.ForceSort();
}
}
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
{
var position = e.GetPosition(this);
if (position.X <= CategoryColumnWidth)
{
_dragHandler = BudgetEditorDragDropHandler.CreateFromEvent(this, e);
}
else
{
_dragHandler?.DestroyDragAdorner();
_dragHandler = null;
}
}
internal void HandleDrop(BudgetEditorDragDropHandler dropInfo)
{
if (dropInfo.DragType != BudgetEditorDragTypes.MasterCategory)
{
throw new InvalidOperationException();
}
if (this.DataContext is BudgetEditorViewModel viewModel)
{
var masterCategoryRow = dropInfo.MasterCategoryRow.DataContext as MasterCategoryRowViewModel;
masterCategoryRow.MasterCategory.SetSortOrder(dropInfo.InsertPosition);
viewModel.BudgetModel.SaveChanges();
viewModel.MasterCategories.ForceSort();
}
}
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
if (_dragHandler != null && e.LeftButton == MouseButtonState.Pressed && !_dragHandler.IsDragging)
{
var newPoint = e.GetPosition(this);
var distance = Point.Subtract(newPoint, _dragHandler.DragStartPosition);
if (distance.Length > 4.0)
{
if (_popupButton != null)
{
_popupButton.IsPopupOpen = false;
_popupButton = null;
}
_dragHandler.StartDrag();
_dragHandler.DestroyDragAdorner();
_dragHandler = null;
}
}
}