/// <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();
}
}
public override void MouseClick(PointF location, Keys controlKeys)
{
GraphicBaseElement element = m_Editor.GetElementAt(location);
if (element == null)
{
if (m_FromElement != null)
{
//floating connection - create a new connection line
FloatingConnection(location);
m_LastMouseLocation = location;
}
return;
}
if (element is GraphicInputOutputElement == false && element is GraphicConnection == false)
{
return;
}
//user clicked a terminal of an element
GraphicInputOutputElement ioelem = element as GraphicInputOutputElement;
GraphicTerminal graphicTerminal = null;
if (ioelem != null)
{
graphicTerminal = ioelem.GetTerminalAt(location);
if (graphicTerminal == null || graphicTerminal.Equals(m_FromElement))
{
return;
}
if (m_FromElement == null)
{
m_FromElement = graphicTerminal;
m_LastMouseLocation = location;
return;
}
TryConnectToTerminal(graphicTerminal, location);
m_LastMouseLocation = location;
}
//user clicked a connection
GraphicConnection connection = element as GraphicConnection;
if (connection != null)
{
if (connection.Equals(m_FromElement))
{
return;
}
if (m_FromElement == null)
{
m_FromElement = connection;
m_LastMouseLocation = location;
return;
}
TryConnectToConnection(connection, location);
m_LastMouseLocation = location;
}
}
