/// <summary>
/// Merges two connection objects into one
/// </summary>
/// <param name="fromConnection">the remaining connection</param>
/// <param name="toConnection">the connection that gets merged</param>
private void MergeConnections(GraphicConnection fromConnection, PointF fromPoint, GraphicConnection toConnection, PointF toPoint)
{
if (fromConnection.Equals(toConnection))
{
return;
}
if (MessageBox.Show(String.Format("Sollen die Verbindungen \"{0}\" und \"{1}\" miteinander verbunden werden?",
fromConnection.Name, toConnection.Name), "Frage", MessageBoxButtons.YesNo,
MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) == DialogResult.Yes)
{
//derive all Terminals and ConnectionItems (lines, nodes)
fromConnection.Merge(toConnection);
IConnectionItem item1 = fromConnection.GetItemAt(fromPoint);
IConnectionItem item2 = fromConnection.GetItemAt(toPoint);
if (item1 is ConnectionLine)
{
item1 = SplitConnectionLine(item1 as ConnectionLine, fromPoint);
}
if (item2 is ConnectionLine)
{
item2 = SplitConnectionLine(item2 as ConnectionLine, fromPoint);
}
ConnectionLine line = new ConnectionLine(item1 as ConnectionNode, item2 as ConnectionNode);
fromConnection.AddChild(line);
m_Editor.RemoveElement(toConnection);
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
}
}
/// <summary>
/// Connect to a Connection
/// </summary>
/// <param name="connection"></param>
private void TryConnectToConnection(GraphicConnection connection, PointF location)
{
if (m_FromElement is GraphicTerminal)
{
Terminal fromTerminal = m_FromElement.LinkedObject as Terminal;
if (fromTerminal.Connection != null)
{
MergeConnections(fromTerminal.Connection.LinkedObject as GraphicConnection, m_LastMouseLocation, connection, location);
}
else
{
IConnectionItem connectionItem = connection.GetItemAt(location);
if (connectionItem is ConnectionNode)
{
//user clicked near a node - connect to this
ConnectionLine line = new ConnectionLine((m_FromElement as GraphicTerminal).ConnectionNode, connectionItem as ConnectionNode);
connection.AddChild(line);
}
else if (connectionItem is ConnectionLine)
{
//user clicked near a line
ConnectionLine prevLine = connectionItem as ConnectionLine;
//place a connection node at location - split connection line
ConnectionNode node = SplitConnectionLine(prevLine, location);
ConnectionLine line = new ConnectionLine(node, (m_FromElement as GraphicTerminal).ConnectionNode);
connection.AddChild(line);
}
connection.ConnectTerminal(m_FromElement as GraphicTerminal);
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
}
}
else if (m_FromElement is GraphicConnection)
{
MergeConnections(m_FromElement as GraphicConnection, m_LastMouseLocation, connection, location);
}
else if (m_FromElement is ConnectionNode)
{
MergeConnections(m_FromElement.Parent as GraphicConnection, m_LastMouseLocation, connection, location);
//GraphicConnection fromConnection = m_FromElement.Parent as GraphicConnection;
}
m_FromElement = null;
m_Editor.Invalidate();
}
/// <summary>
/// Connect to a Terminal (resp. its connection)
/// </summary>
/// <param name="graphicTerminal"></param>
private void TryConnectToTerminal(GraphicTerminal graphicTerminal, PointF location)
{
Terminal toTerminal = graphicTerminal.LinkedObject as Terminal;
if (toTerminal.Connection != null)
{
//merging connections not supported by clicking terminals
return;
}
if (m_FromElement is GraphicTerminal)
{
Terminal fromTerminal = m_FromElement.LinkedObject as Terminal;
//if (fromTerminal.Connection != null && toTerminal.Connection != null)
//{
// MergeConnections(fromTerminal.Connection.LinkedObject as GraphicConnection, m_LastMouseLocation,
// toTerminal.Connection.LinkedObject as GraphicConnection, location);
//}
//else if (fromTerminal.Connection != null)
//{
// //IDEE: suche über allen linien die kürzeste entfernung vom ziel zur verbindung
// GraphicConnection graphicConnection = fromTerminal.Connection.LinkedObject as GraphicConnection;
// ConnectionLine line = new ConnectionLine((m_FromElement as GraphicTerminal).ConnectionNode, graphicTerminal.ConnectionNode);
// graphicConnection.AddChild(line);
// graphicConnection.ConnectTerminal(graphicTerminal);
// m_Editor.UpdateDrawing();
// m_Editor.RaiseChangedEvent();
//}
//else if (toTerminal.Connection != null)
//{
// GraphicConnection graphicConnection = toTerminal.Connection.LinkedObject as GraphicConnection;
// graphicConnection.ConnectTerminal(m_FromElement as GraphicTerminal);
// m_Editor.UpdateDrawing();
// m_Editor.RaiseChangedEvent();
//}
//else
if (fromTerminal.Connection == null && toTerminal.Connection == null)
{
GraphicTerminal fromGraphicTerminal = m_FromElement as GraphicTerminal;
if (IsOrthogonal(fromGraphicTerminal.ConnectionNode.Location, graphicTerminal.ConnectionNode.Location) == false)
{
return;
}
GraphicConnection graphicConnection
= GraphicObjectFactory.CreateInstance(typeof(Connection), new Connection()) as GraphicConnection;
graphicConnection.Name = UniqueName.GetUniqueName(m_Editor.Circuit, typeof(Connection));
graphicConnection.ConnectTerminal(fromGraphicTerminal);
graphicConnection.ConnectTerminal(graphicTerminal);
ConnectionLine line = new ConnectionLine(fromGraphicTerminal.ConnectionNode, graphicTerminal.ConnectionNode);
graphicConnection.AddChild(line);
m_Editor.AddElement(graphicConnection);
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
}
}
if (m_FromElement is GraphicConnection)
{
GraphicConnection fromConnection = m_FromElement as GraphicConnection;
IConnectionItem connectionItem = fromConnection.GetItemAt(m_LastMouseLocation);
if (connectionItem is ConnectionNode)
{
ConnectionLine line = new ConnectionLine(connectionItem as ConnectionNode, graphicTerminal.ConnectionNode);
fromConnection.AddChild(line);
}
else if (connectionItem is ConnectionLine)
{
ConnectionLine prevLine = connectionItem as ConnectionLine;
ConnectionNode node = new ConnectionNode(prevLine.NearestPointOnLine(m_LastMouseLocation));
ConnectionLine line1 = new ConnectionLine(prevLine.Nodes[0], node);
ConnectionLine line2 = new ConnectionLine(prevLine.Nodes[1], node);
fromConnection.RemoveChild(prevLine);
fromConnection.AddChild(node);
fromConnection.AddChild(line1);
fromConnection.AddChild(line2);
ConnectionLine line = new ConnectionLine(node, graphicTerminal.ConnectionNode);
fromConnection.AddChild(line);
}
fromConnection.ConnectTerminal(graphicTerminal);
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
}
if (m_FromElement is ConnectionNode)
{
m_FromElement.Location = ForceOrthogonality(graphicTerminal.ConnectionNode.Location, m_FromElement.Location);
ConnectionLine line = new ConnectionLine(m_FromElement as ConnectionNode, graphicTerminal.ConnectionNode);
m_FromElement.Parent.AddChild(line);
(m_FromElement.Parent as GraphicConnection).ConnectTerminal(graphicTerminal);
m_Editor.UpdateDrawing();
m_Editor.RaiseChangedEvent();
}
m_FromElement = null;
m_Editor.Invalidate();
}
/// <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();
}