public override void OnNodeDrop(object dataObject, DragOperation operation)
{
// It allows dropping either project references or projects.
// Dropping a project creates a new project reference to that project
DotNetProject project = dataObject as DotNetProject;
if (project != null)
{
ProjectReference pr = new ProjectReference(project);
DotNetProject p = CurrentNode.GetParentDataItem(typeof(DotNetProject), false) as DotNetProject;
if (ProjectReferencesProject(project, p.Name))
{
return;
}
p.References.Add(pr);
IdeApp.ProjectOperations.Save(p);
return;
}
// It's dropping a ProjectReference object.
ProjectReference pref = dataObject as ProjectReference;
ITreeNavigator nav = CurrentNode;
if (operation == DragOperation.Move)
{
NodePosition pos = nav.CurrentPosition;
nav.MoveToObject(dataObject);
DotNetProject p = nav.GetParentDataItem(typeof(DotNetProject), true) as DotNetProject;
nav.MoveToPosition(pos);
DotNetProject p2 = nav.GetParentDataItem(typeof(DotNetProject), true) as DotNetProject;
p.References.Remove(pref);
// Check if there is a cyclic reference after removing from the source project
if (pref.ReferenceType == ReferenceType.Project)
{
DotNetProject pdest = p.ParentSolution.FindProjectByName(pref.Reference) as DotNetProject;
if (pdest == null || ProjectReferencesProject(pdest, p2.Name))
{
// Restore the dep
p.References.Add(pref);
return;
}
}
p2.References.Add(pref);
IdeApp.ProjectOperations.Save(p);
IdeApp.ProjectOperations.Save(p2);
}
else
{
nav.MoveToParent(typeof(DotNetProject));
DotNetProject p = nav.DataItem as DotNetProject;
// Check for cyclic referencies
if (pref.ReferenceType == ReferenceType.Project)
{
DotNetProject pdest = p.ParentSolution.FindProjectByName(pref.Reference) as DotNetProject;
if (pdest == null || ProjectReferencesProject(pdest, p.Name))
{
return;
}
}
p.References.Add((ProjectReference)pref.Clone());
IdeApp.ProjectOperations.Save(p);
}
}