private void DragTop(double scale, ViewModelDesignerItem item, ViewModelSelectionService selectionService)
{
IEnumerable <ViewModelDesignerItem> groupItems = selectionService.GetGroupMembers(item).Cast <ViewModelDesignerItem>();
double groupBottom = Canvas.GetTop(item) + item.Height;
foreach (ViewModelDesignerItem groupItem in groupItems)
{
double groupItemTop = Canvas.GetTop(groupItem);
double delta = (groupBottom - groupItemTop) * (scale - 1);
Canvas.SetTop(groupItem, groupItemTop - delta);
groupItem.Height = groupItem.ActualHeight * scale;
}
}
private void DragLeft(double scale, ViewModelDesignerItem item, ViewModelSelectionService selectionService)
{
IEnumerable <ViewModelDesignerItem> groupItems = selectionService.GetGroupMembers(item).Cast <ViewModelDesignerItem>();
double groupLeft = Canvas.GetLeft(item) + item.Width;
foreach (ViewModelDesignerItem groupItem in groupItems)
{
double groupItemLeft = Canvas.GetLeft(groupItem);
double delta = (groupLeft - groupItemLeft) * (scale - 1);
Canvas.SetLeft(groupItem, groupItemLeft - delta);
groupItem.Width = groupItem.ActualWidth * scale;
}
}