public void SetUp()
{
_settings = new Tailviewer.Settings.DataSources();
_scheduler = new ManualTaskScheduler();
_dataSources = new DataSources(_scheduler, _settings);
_model = new MergedDataSourceViewModel(_dataSources.AddGroup());
}
private void DragFromGroup(IDataSourceViewModel source, IDataSourceViewModel dest, MergedDataSourceViewModel parent)
{
parent.RemoveChild(source);
DissolveGroupIfNecessary(parent);
Drag(source, dest);
}
private void Drag(IDataSourceViewModel source, IDataSourceViewModel dest)
{
var merged = dest as MergedDataSourceViewModel;
if (merged != null)
{
// Drag from ungrouped onto an existing group
// => add to existing group
AddFileToGroup(source, merged);
}
else
{
// Drag from ungrouped onto a dest within a group
// => find group of dest and addd to it
merged = dest.Parent as MergedDataSourceViewModel;
if (merged != null)
{
AddFileToGroup(source, merged);
}
else
{
// Drag from ungrouped onto another ungrouped source
// => remove dest as well and create new group
int destIndex = _observable.IndexOf(dest);
if (destIndex != -1)
{
_observable.Remove(dest);
MergedDataSource mergedDataSource = _dataSources.AddGroup();
merged = new MergedDataSourceViewModel(mergedDataSource);
merged.Remove += OnRemove;
merged.AddChild(source);
merged.AddChild(dest);
_observable.Insert(destIndex, merged);
SelectedItem = merged;
}
}
}
}
private void DissolveGroupIfNecessary(MergedDataSourceViewModel group)
{
if (group.ChildCount == 1)
{
int groupIndex = _observable.IndexOf(group);
_observable.RemoveAt(groupIndex);
_dataSources.Remove(group.DataSource);
IDataSourceViewModel child = group.Observable.First();
group.RemoveChild(child);
_observable.Insert(groupIndex, child);
}
}
private IDataSourceViewModel CreateViewModel(IDataSource dataSource)
{
if (dataSource == null)
throw new ArgumentNullException("dataSource");
IDataSourceViewModel viewModel;
var single = dataSource as SingleDataSource;
if (single != null)
{
viewModel = new SingleDataSourceViewModel(single);
}
else
{
var merged = dataSource as MergedDataSource;
if (merged != null)
{
viewModel = new MergedDataSourceViewModel(merged);
}
else
{
throw new ArgumentException(string.Format("Unknown data source: {0} ({1})", dataSource, dataSource.GetType()));
}
}
viewModel.Remove += OnRemove;
_allDataSourceViewModels.Add(viewModel);
if (_settings.DataSources.SelectedItem == viewModel.DataSource.Id)
{
SelectedItem = viewModel;
}
return viewModel;
}
private static void AddFileToGroup(IDataSourceViewModel source, MergedDataSourceViewModel viewModel)
{
viewModel.AddChild(source);
}
