public void AddMesh()
{
MeshViewModel mesh = new MeshViewModel();
MeshList.Add(mesh);
RootLevel.Add(mesh);
}
private void Drop(MeshViewModel child)
{
if (child.Parent != null)
{
child.SetNewParent(null);
RootLevel.Add(child);
}
}
private DragDropEffects GetDropEffects(MeshViewModel mesh)
{
if (HasChild(mesh))
{
return(DragDropEffects.None);
}
return(DragDropEffects.Move);
}
private void _parent_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
MeshViewModel parent = (MeshViewModel)sender;
if (e.PropertyName == "Position")
{
Position = Position + parent.Position - parent.OldPosition;
}
}
private bool HasChild(MeshViewModel mesh)
{
if (mesh == this)
{
return(true);
}
foreach (MeshViewModel m in mesh.Children)
{
if (HasChild(m))
{
return(true);
}
}
return(false);
}
public void RemoveMesh(MeshViewModel mesh)
{
foreach (MeshViewModel vm in mesh.Children)
{
vm.Parent = mesh.Parent;
}
if (mesh.Parent == null)
{
RootLevel.Remove(mesh);
}
else
{
mesh.Parent.Children.Remove(mesh);
}
}
public void SetNewParent(MeshViewModel parent)
{
//remove current parent
if (_parent != null)
{
_parent.Children.Remove(this);
_parent.Model.children.Remove(_mesh);
}
//set parent
_parent = parent;
_mesh.parent = (parent == null)? null : parent.Model;
// add this mesh to parent's children & subscribe to parent's properties
if (parent != null)
{
_parent.PropertyChanged += _parent_PropertyChanged;
parent.Children.Add(this);
parent.Model.children.Add(_mesh);
}
}
public MeshTreeViewModel(MeshCollection meshList)
{
_meshList = meshList;
MeshList = new ObservableCollection <MeshViewModel>();
RootLevel = new ObservableCollection <MeshViewModel>();
AddMeshCommand = new DelegateCommand(AddMesh);
RemoveMeshCommand = new DelegateCommand <MeshViewModel>(RemoveMesh);
// Instantiate meshes
foreach (Mesh mesh in _meshList.meshes)
{
MeshViewModel mv = new MeshViewModel(mesh);
MeshList.Add(mv);
mv.PropertyChanged += new PropertyChangedEventHandler(Mesh_PropertyChanged);
}
// Linking Tree
foreach (MeshViewModel mv in MeshList)
{
mv.Model.LinkToParent(_meshList.meshes);
MeshViewModel parent = MeshList.FirstOrDefault(x => (x.Model == mv.Model.parent));
mv.Parent = parent;
if (mv.Parent != null)
{
if (!parent.Children.Contains(mv))
{
parent.Children.Add(mv);
}
}
mv.PropertyChanged += Mv_PropertyChanged;
}
// Create Scene
Scene = new OGLScene(_meshList.meshes);
}
private DragDropEffects GetDropEffects(MeshViewModel mesh)
{
return(DragDropEffects.Move);
}
private object GetData(MeshViewModel mesh)
{
return(this);
}
private void Drop(MeshViewModel child)
{
child.SetNewParent(this);
OnPropertyChanged("Parent");
}
private DragDropEffects GetDragEffects(MeshViewModel mesh)
{
// Only allow the drag and drop to start if we have any cookies
return(DragDropEffects.Move);
}