/**
* Returns if the given father has a direct line of dialogue nodes to get to
* the child node.
*
* @param fatherView
* Father node
* @param childView
* Child node
* @return True if the father is related to child following only dialogue
* nodes, false otherwise
*/
private bool isDirectFather(ConversationNodeView fatherView, ConversationNodeView childView)
{
bool isDirectFatherL = false;
// Check if both nodes are dialogue nodes
if (fatherView.getType() == ConversationNodeViewEnum.DIALOGUE && childView.getType() == ConversationNodeViewEnum.DIALOGUE)
{
// Check if the father is not a terminal node
if (!fatherView.isTerminal())
{
// If the only child of the father equals the child, there is a direct line
if (fatherView.getChildView(0) == childView)
{
isDirectFatherL = true;
}
// If not, keep searching with the only child of the father
else
{
isDirectFatherL = isDirectFather(fatherView.getChildView(0), childView);
}
}
}
return(isDirectFatherL);
}
public override bool canAddChild(ConversationNodeView nodeView, int nodeType)
{
bool canAddChild = false;
// A dialogue node only accepts nodes if it is terminal
if (nodeView.getType() == ConversationNodeViewEnum.DIALOGUE && nodeView.isTerminal())
{
canAddChild = true;
}
// An option node only accepts dialogue nodes
if (nodeView.getType() == ConversationNodeViewEnum.OPTION && nodeType == (int)ConversationNodeViewEnum.DIALOGUE)
{
canAddChild = true;
}
return(canAddChild);
}
public override bool canDeleteLink(ConversationNodeView nodeView)
{
bool canLinkNode = false;
// The node must not be the root
if (nodeView != graphConversation.getRootNode())
{
// A dialogue node only can link it it is terminal
if (nodeView.getType() == ConversationNodeViewEnum.DIALOGUE && nodeView.isTerminal())
{
canLinkNode = true;
}
// An option node can always link to another node
if (nodeView.getType() == ConversationNodeViewEnum.OPTION)
{
canLinkNode = true;
}
}
return(!canLinkNode && this.getAllNodesViews().Count > 1);
}
public override bool canLinkNodeTo(ConversationNodeView fatherView, ConversationNodeView childView)
{
bool canLinkNodeTo = false;
// Check first if the nodes are different
if (fatherView != childView)
{
// If the father is a dialogue node, it can link to another if it is terminal
// Check also that the father is not a child of the child node, to prevent cycles
if (fatherView.getType() == ConversationNodeViewEnum.DIALOGUE && fatherView.isTerminal() && !isDirectFather(childView, fatherView))
{
canLinkNodeTo = true;
}
// If the father is an option node, it can only link to a dialogue node
if (fatherView.getType() == ConversationNodeViewEnum.OPTION && childView.getType() == ConversationNodeViewEnum.DIALOGUE)
{
canLinkNodeTo = true;
}
}
return(canLinkNodeTo);
}
