void Reset()
{
m_Active = false;
m_Edge = null;
m_ConnectedPort = null;
m_ConnectedEdgeDragHelper = null;
m_DetachedPort = null;
m_DetachedFromInputPort = false;
}
protected void OnMouseMove(MouseMoveEvent evt)
{
// If the left mouse button is not down then return
if (m_Edge == null)
{
return;
}
evt.StopPropagation();
bool alreadyDetached = (m_DetachedPort != null);
// If one end of the edge is not already detached then
if (!alreadyDetached)
{
float delta = (evt.mousePosition - m_PressPos).sqrMagnitude;
if (delta < (s_StartDragDistance * s_StartDragDistance))
{
return;
}
// Determine which end is the nearest to the mouse position then detach it.
Vector2 outputPos = new Vector2(m_Edge.output.GetGlobalCenter().x, m_Edge.output.GetGlobalCenter().y);
Vector2 inputPos = new Vector2(m_Edge.input.GetGlobalCenter().x, m_Edge.input.GetGlobalCenter().y);
float distanceFromOutput = (m_PressPos - outputPos).sqrMagnitude;
float distanceFromInput = (m_PressPos - inputPos).sqrMagnitude;
if (distanceFromInput > 50 * 50 && distanceFromOutput > 50 * 50)
{
return;
}
m_DetachedFromInputPort = distanceFromInput < distanceFromOutput;
if (m_DetachedFromInputPort)
{
m_ConnectedPort = m_Edge.output;
m_DetachedPort = m_Edge.input;
m_DetachedPort.Disconnect(m_Edge);
m_Edge.input = null;
}
else
{
m_ConnectedPort = m_Edge.input;
m_DetachedPort = m_Edge.output;
m_DetachedPort.Disconnect(m_Edge);
m_Edge.output = null;
}
// Use the edge drag helper of the still connected port
m_ConnectedEdgeDragHelper = m_ConnectedPort.edgeConnector.edgeDragHelper;
m_ConnectedEdgeDragHelper.draggedPort = m_ConnectedPort;
m_ConnectedEdgeDragHelper.edgeCandidate = m_Edge;
m_Edge.candidatePosition = evt.mousePosition;
// Redirect the last mouse down event to active the drag helper
if (m_ConnectedEdgeDragHelper.HandleMouseDown(m_LastMouseDownEvent))
{
m_Active = true;
}
else
{
Reset();
}
m_LastMouseDownEvent = null;
}
if (m_Active)
{
m_ConnectedEdgeDragHelper.HandleMouseMove(evt);
}
}
