protected override void OnRender(DrawingContext drawingContext)
{
if (_type.HasFlag(DataSourceDropType.ArrangeTop))
{
drawingContext.DrawLine(_pen, new Point(0, 0), new Point(ActualWidth, 0));
}
else if (_type.HasFlag(DataSourceDropType.ArrangeBottom))
{
drawingContext.DrawLine(_pen, new Point(0, ActualHeight), new Point(ActualWidth, ActualHeight));
}
}
private void DropToArrange(IDataSourceViewModel source, IDataSourceViewModel dest, DataSourceDropType dropType)
{
IDataSourceViewModel sourceParent = source.Parent;
if (sourceParent != null)
{
//
// When the source is part of a group, then any arrange is going to remove it
// from said group.
//
var group = ((MergedDataSourceViewModel) sourceParent);
group.RemoveChild(source);
if (sourceParent != dest.Parent)
{
//
// If both source and dest are part of different groups, then
// we need to check if source's group needs to be dissolved due to
// having only 1 child left.
//
DissolveGroupIfNecessary(group);
}
}
else
{
_observable.Remove(source);
}
if (dest.Parent != null)
{
//
// If the destination has a parent then we need to insert
// the source into it's collection.
//
var merged = ((MergedDataSourceViewModel) dest.Parent);
int index = merged.Observable.IndexOf(dest);
if (dropType.HasFlag(DataSourceDropType.ArrangeBottom))
++index;
merged.Insert(index, source);
}
else
{
//
// Otherwise we insert the source into the flat, or root
// collection.
//
int index = _observable.IndexOf(dest);
if (dropType.HasFlag(DataSourceDropType.ArrangeBottom))
++index;
if (index < 0)
index = 0;
_observable.Insert(index, source);
}
SelectedItem = source;
}
private void DropToArrange(IDataSourceViewModel source, IDataSourceViewModel dest, DataSourceDropType dropType)
{
IDataSourceViewModel sourceParent = source.Parent;
if (sourceParent != null)
{
//
// When the source is part of a group, then any arrange is going to remove it
// from said group.
//
var group = ((MergedDataSourceViewModel)sourceParent);
group.RemoveChild(source);
if (sourceParent != dest.Parent)
{
//
// If both source and dest are part of different groups, then
// we need to check if source's group needs to be dissolved due to
// having only 1 child left.
//
DissolveGroupIfNecessary(group);
}
}
else
{
_observable.Remove(source);
}
if (dest.Parent != null)
{
//
// If the destination has a parent then we need to insert
// the source into it's collection.
//
var merged = ((MergedDataSourceViewModel)dest.Parent);
int index = merged.Observable.IndexOf(dest);
if (dropType.HasFlag(DataSourceDropType.ArrangeBottom))
{
++index;
}
merged.Insert(index, source);
}
else
{
//
// Otherwise we insert the source into the flat, or root
// collection.
//
int index = _observable.IndexOf(dest);
if (dropType.HasFlag(DataSourceDropType.ArrangeBottom))
{
++index;
}
if (index < 0)
{
index = 0;
}
_observable.Insert(index, source);
if (dropType.HasFlag(DataSourceDropType.ArrangeTop))
{
if (index + 1 < _observable.Count)
{
var tmp = source.DataSource.Settings;
var before = _observable[index + 1].DataSource.Settings;
_settings.DataSources.MoveBefore(tmp, before);
}
}
}
SelectedItem = source;
_settings.SaveAsync();
}