/// <summary>
/// Create a floating connnection, i.e. not completely connected everywhere
/// </summary>
/// <param name="location"></param>
private void FloatingConnection(PointF location)
{
if (m_FromElement is GraphicConnection)
{
GraphicConnection graphicConnection = m_FromElement as GraphicConnection;
IConnectionItem connectionItem = graphicConnection.GetItemAt(m_LastMouseLocation);
if (connectionItem is ConnectionNode)
{
//user clicked near a node at fist, connect to this
ConnectionNode prevNode = connectionItem as ConnectionNode;
location = ForceOrthogonality(prevNode.Location, m_Editor.AlignToGrid(location));
bool skip = false;
//check whether the new line would just lenghten the previous line
if (prevNode.Lines.Length == 1)
{
ConnectionLine prevLine = prevNode.Lines[0];
if (prevLine.LineStyle == ConnectionLine.DetermineLineStyle(prevNode.Location, location))
{
//place the node at the new location in this case
prevNode.Location = location;
skip = true;
}
}
if (skip == false)
{
//place a new line
ConnectionNode node = new ConnectionNode(location);
ConnectionLine line = new ConnectionLine(prevNode, node);
m_FromElement.AddChild(node);
m_FromElement.AddChild(line);
m_FromElement = node;
}
}
else if (connectionItem is ConnectionLine)
{
//user clicked near a line at first
ConnectionLine prevLine = connectionItem as ConnectionLine;
//place a connection node at location - split connection line
ConnectionNode node = SplitConnectionLine(prevLine, m_LastMouseLocation);
//the new node/line
location = ForceOrthogonality(node.Location, m_Editor.AlignToGrid(location));
ConnectionNode fnode = new ConnectionNode(location);
ConnectionLine line = new ConnectionLine(node, fnode);
m_FromElement.AddChild(fnode);
m_FromElement.AddChild(line);
m_FromElement = fnode;
}
}
else if (m_FromElement is GraphicTerminal)
{
//floating connection from a terminal
GraphicTerminal graphicTerminal = m_FromElement as GraphicTerminal;
location = ForceOrthogonality(graphicTerminal.ConnectionNode.Location, m_Editor.AlignToGrid(location));
ConnectionNode node = new ConnectionNode(location);
ConnectionLine line = new ConnectionLine(node, graphicTerminal.ConnectionNode);
GraphicConnection graphicConnection =
GraphicObjectFactory.CreateInstance(typeof(Connection), new Connection()) as GraphicConnection;
graphicConnection.Name = UniqueName.GetUniqueName(m_Editor.Circuit, typeof(Connection));
graphicConnection.AddChild(node);
graphicConnection.AddChild(line);
graphicConnection.ConnectTerminal(graphicTerminal);
m_Editor.AddElement(graphicConnection);
//proceed connecting with this node
m_FromElement = node;
}
else if (m_FromElement is ConnectionNode)
{
//special case -> could be covered by "is GraphicConnection"
//sequential floating lines
ConnectionNode prevNode = m_FromElement as ConnectionNode;
location = ForceOrthogonality(prevNode.Location, m_Editor.AlignToGrid(location));
bool skip = false;
//check whether the new line would just lenghten the previous line
if (prevNode.Lines.Length == 1)
{
ConnectionLine prevLine = prevNode.Lines[0];
if (prevLine.LineStyle == ConnectionLine.DetermineLineStyle(prevNode.Location, location))
{
//place the node at the new location in this case
prevNode.Location = location;
skip = true;
}
}
if (skip == false)
{
//place a new line
ConnectionNode node = new ConnectionNode(location);
ConnectionLine line = new ConnectionLine(prevNode, node);
GraphicConnection graphicConnection = prevNode.Parent as GraphicConnection;
graphicConnection.AddChild(node);
graphicConnection.AddChild(line);
m_FromElement = node;
}
}
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
m_Editor.Invalidate();
}
