public void OnConnectionDragging(Point currentDragPoint, ConnectionViewModel connection)
{
// If current drag point is close to an input connector, show its snapped position.
ConnectorViewModel nearbyConnector = null;
if (connectingTo)
{
nearbyConnector = FindNearbyInputConnector(connection, currentDragPoint);
}
else
{
nearbyConnector = FindNearbyOutputConnector(connection, currentDragPoint);
}
Point pnt = (nearbyConnector != null)
? nearbyConnector.Position
: currentDragPoint;
if (connectingTo)
{
connection.ToPosition = pnt;
}
else
{
connection.FromPosition = pnt;
}
}
public ConnectionViewModel OnConnectionDragStarted(ConnectorViewModel sourceConnector, Point currentDragPoint)
{
if (sourceConnector is OutputConnectorViewModel)
{
connectingTo = true;
var connection = new ConnectionViewModel((OutputConnectorViewModel)sourceConnector)
{
ToPosition = currentDragPoint
};
Connections.Add(connection);
return(connection);
}
else if (sourceConnector is InputConnectorViewModel)
{
connectingTo = false;
var connection = new ConnectionViewModel((InputConnectorViewModel)sourceConnector)
{
FromPosition = currentDragPoint
};
Connections.Add(connection);
return(connection);
}
return(null);
}
private OutputConnectorViewModel FindNearbyOutputConnector(ConnectionViewModel connection, Point mousePosition)
{
return(Elements.SelectMany(x => x.OutputConnectors)
.FirstOrDefault(x => AreClose(x.Position, mousePosition, 10)));
}
public void OnConnectionDragCompleted(Point currentDragPoint, ConnectionViewModel newConnection, ConnectorViewModel sourceConnector)
{
var fromNewConnection = (QuestViewModel)(newConnection.From?.Element);
var toNewConnection = (QuestViewModel)(newConnection.To?.Element);
newConnection.Detach();
Connections.Remove(newConnection);
CurrentDragPoint = currentDragPoint;
if (connectingTo)
{
var nearbyConnector = FindNearbyInputConnector(newConnection, currentDragPoint);
if (nearbyConnector == null)
{
var quest = picker.ChooseQuest();
if (quest == null)
{
return;
}
var q = new Quest(quest.Id, quest.Title);
UseCurrentDragPoint = true;
bool added = quests.AddQuest(q);
UseCurrentDragPoint = false;
if (added)
{
q.RequiredQuests.Add(fromNewConnection.quest);
}
return;
}
if (nearbyConnector == null || sourceConnector.Element == nearbyConnector.Element)
{
return;
}
var to = ((QuestViewModel)nearbyConnector.Element).quest;
var from = fromNewConnection.quest;
to.RequiredQuests.Add(from);
}
else
{
var nearbyConnector = FindNearbyOutputConnector(newConnection, currentDragPoint);
if (nearbyConnector == null)
{
var quest = picker.ChooseQuest();
if (quest == null)
{
return;
}
var q = new Quest(quest.Id, quest.Title);
UseCurrentDragPoint = true;
bool added = quests.AddQuest(q);
UseCurrentDragPoint = false;
if (added)
{
toNewConnection.quest.RequiredQuests.Add(q);
}
return;
}
if (nearbyConnector == null || sourceConnector.Element == nearbyConnector.Element)
{
return;
}
var to = toNewConnection.quest;
var from = ((QuestViewModel)nearbyConnector.Element).quest;
to.RequiredQuests.Add(from);
}
}
