protected virtual IVisualEdge NewVisual(Point p)
{
var result = SceneExtensions.CreateEdge(this.Scene);
newCounter++;
result.Root = Current;
result.Leaf = Current;
return(result);
}
public override void Dropped(DragEventArgs e)
{
var pt = Camera.ToSource(e.Position);
var scene = this.Scene;
var target = scene.Hovered ?? HitTestFocused(e.Position);
IVisual item = null;
if (Dragging && Dropping)
{
// the current Drop has started in this instance
// so we make a link
if (target != null && Source != target)
{
SceneExtensions.CreateEdge(scene, Source, target);
}
e.Success = true;
return;
}
if (InprocDragDrop.Dragging)
{
var source = InprocDragDrop.Data as GraphCursor <IVisual, IVisualEdge>;
if (source != null && source.Cursor != target)
{
item = Mesh.LookUp(source.Graph, scene.Graph, source.Cursor);
if (item == null)
{
//TODO: error here
//return;
}
}
}
if (item == null)
{
item = DragDropViz.VisualOfTransferData(scene.Graph, e.Data);
if (item != null)
{
item.Location = pt;
}
}
if (item != null)
{
SceneExtensions.AddItem(scene, item, Layout, pt);
if (target != null && !scene.Graph.Edges(target).Any(edge => edge.Leaf == item || edge.Root == item))
{
SceneExtensions.CreateEdge(scene, target, item);
}
}
else
{
// no known type found to import
string dt = "not found:\t";
}
InprocDragDrop.Data = null;
InprocDragDrop.Dragging = false;
Dragging = false;
}
