/// <summary>
/// Attach a preexisting GameNode to this GameNode.
/// </summary>
/// <param name="node">GameNode to attach.</param>
public void attachChildNode(GameNode node)
{
// Form the parent-child relationship
node._parent = this;
_children.Add(node.Name, node);
// Tell current children about the new child
NodeEventArgs e = new NodeEventArgs(this, node);
if (ChildAttached != null)
{
ChildAttached(e);
}
// Tell the new child about future children
node.subscribe(this);
}
/// <summary>
/// Verify that this GameNode's parent tile is the tile directly underneath it.
/// This functionality is essential for corrent draw order of objects.
/// </summary>
private void checkForNewParentTile()
{
// Node must already have a parent
if (_parent == null)
{
return;
}
GameNode newParent = _gameLevelMgr.tileAtIsoCoords(_positionIsometric).Node;
// If no node was found, we can't do anything
if (newParent == null)
{
return;
}
// If we do have a parent, make sure we didn't grab the same one
if (_parent == newParent)
{
return;
}
// We have a new parent, make the switch
_parent.Entity.Color = Color.White;
_parent.detachChildNode(_name);
newParent.attachChildNode(this);
_parent.Entity.Color = Color.Gold;
// Fire parent changed event
NodeEventArgs e = new NodeEventArgs(this);
if (ParentChange != null)
{
ParentChange(e);
}
}
/// <summary>
/// This function is fired whenever one of this node's subscriptions detaches a child node.
/// </summary>
/// <param name="sender">Node which detached a child</param>
/// <param name="child">The child which was attached</param>
/// <param name="e">Event args</param>
private void parentDetachedChild(NodeEventArgs e)
{
Console.WriteLine(_name + " (received event: Parent Detached Child) Sender: " + e.Sender.Name + " Child: " + e.Child.Name);
}
/// <summary>
/// Verify that this GameNode's parent tile is the tile directly underneath it.
/// This functionality is essential for corrent draw order of objects.
/// </summary>
private void checkForNewParentTile()
{
// Node must already have a parent
if (_parent == null)
return;
GameNode newParent = _gameLevelMgr.tileAtIsoCoords(_positionIsometric).Node;
// If no node was found, we can't do anything
if (newParent == null)
return;
// If we do have a parent, make sure we didn't grab the same one
if (_parent == newParent)
return;
// We have a new parent, make the switch
_parent.Entity.Color = Color.White;
_parent.detachChildNode(_name);
newParent.attachChildNode(this);
_parent.Entity.Color = Color.Gold;
// Fire parent changed event
NodeEventArgs e = new NodeEventArgs(this);
if (ParentChange != null)
ParentChange(e);
}
/// <summary>
/// Detach a specified child node and return it
/// </summary>
/// <param name="name">Name of the previously created node</param>
/// <returns>Newly detached node</returns>
public GameNode detachChildNode(String name)
{
// Grab the child
GameNode child = getChildNode(name);
if (child == null)
return null;
// Remove the parent-child relationship
_children.Remove(name);
child._parent = null;
// Stop telling this child about future children
child.unsubscribe(this);
// Tell all children about the node we just detached
NodeEventArgs e = new NodeEventArgs(this, child);
if (ChildDetached != null)
ChildDetached(e);
// Pass the detached node to caller
return child;
}
/// <summary>
/// Attach a preexisting GameNode to this GameNode.
/// </summary>
/// <param name="node">GameNode to attach.</param>
public void attachChildNode(GameNode node)
{
// Form the parent-child relationship
node._parent = this;
_children.Add(node.Name, node);
// Tell current children about the new child
NodeEventArgs e = new NodeEventArgs(this, node);
if (ChildAttached != null)
ChildAttached(e);
// Tell the new child about future children
node.subscribe(this);
}
/// <summary>
/// This function is fired whenever one of this node's subscriptions detaches a child node.
/// </summary>
/// <param name="sender">Node which detached a child</param>
/// <param name="child">The child which was attached</param>
/// <param name="e">Event args</param>
private void parentDetachedChild(NodeEventArgs e)
{
Console.WriteLine(_name + " (received event: Parent Detached Child) Sender: " + e.Sender.Name + " Child: " + e.Child.Name);
}