/// <summary>
/// Adds the connection.
/// </summary>
/// <param name="from">From parameter.</param>
/// <param name="to">To parameter.</param>
/// <param name="metric">The metric.</param>
/// <returns>true if the connection was created; otherwise false.</returns>
public bool AddConnection(string from, string to, int metric)
{
NetSimClient fromClient = this.Clients.FirstOrDefault(c => c.Id.Equals(from));
NetSimClient toClient = this.Clients.FirstOrDefault(c => c.Id.Equals(to));
if (fromClient == null || toClient == null)
{
return(false);
}
NetSimConnection connection = new NetSimConnection()
{
EndPointA = fromClient,
EndPointB = toClient,
Id = $"{from} - {to}",
Metric = metric
};
if (fromClient.Connections.ContainsKey(to) || toClient.Connections.ContainsKey(from))
{
return(false);
}
// forward updates
connection.StateUpdated += this.OnUpdated;
this.Connections.Add(connection);
fromClient.Connections.Add(to, connection);
toClient.Connections.Add(from, connection);
this.OnUpdated();
return(true);
}
/// <summary>
/// Creates the connection edge.
/// </summary>
/// <param name="edge">The edge.</param>
/// <returns>The created element for the edge.</returns>
private UIElement CreateConnectionEdge(NetSimConnection edge)
{
Line connectionLine = new Line
{
StrokeThickness = 4,
StrokeDashOffset = 1,
Stroke = Brushes.YellowGreen,
Tag = edge,
X1 = edge.EndPointA.Location.Left,
Y1 = edge.EndPointA.Location.Top,
X2 = edge.EndPointB.Location.Left,
Y2 = edge.EndPointB.Location.Top,
ToolTip = this.CreateConnectionTooltip(edge)
};
if (edge.IsOffline)
{
connectionLine.StrokeDashArray = new DoubleCollection(new List <double>()
{
2, 2
});
connectionLine.Stroke = Brushes.Red;
}
if (edge.IsTransmitting)
{
connectionLine.Stroke = Brushes.Orange;
}
return(connectionLine);
}
/// <summary>
/// Creates the message animation.
/// </summary>
/// <param name="edge">The edge.</param>
/// <param name="message">The message.</param>
/// <param name="uimessage">The message control.</param>
/// <param name="step">The step.</param>
/// <returns>The created storyboard for the message animation.</returns>
private static Storyboard CreateMessageAnimation(
NetSimConnection edge,
ConnectionFrameMessage message,
MessageControl uimessage,
NetSimMessageTransmissionStep step)
{
INetSimVisualizableItem receiver;
INetSimVisualizableItem sender;
GetMessageReceiverSender(edge, message, out receiver, out sender);
int middleTop = (edge.EndPointA.Location.Top + edge.EndPointB.Location.Top) / 2;
int middleLeft = (edge.EndPointA.Location.Left + edge.EndPointB.Location.Left) / 2;
if (receiver == null || sender == null)
{
// return empty storyboard
return(new Storyboard());
}
DoubleAnimation animationTop = new DoubleAnimation {
Duration = TimeSpan.FromSeconds(0.5)
};
DoubleAnimation animationLeft = new DoubleAnimation {
Duration = TimeSpan.FromSeconds(0.5)
};
if (step == NetSimMessageTransmissionStep.Sending)
{
animationTop.From = sender.Location.Top;
animationTop.To = middleTop;
animationLeft.From = sender.Location.Left;
animationLeft.To = middleLeft;
}
else
{
animationTop.From = middleTop;
animationTop.To = receiver.Location.Top;
animationLeft.From = middleLeft;
animationLeft.To = receiver.Location.Left;
}
Storyboard board = new Storyboard();
board.Children.Add(animationLeft);
board.Children.Add(animationTop);
Storyboard.SetTarget(animationTop, uimessage);
Storyboard.SetTargetProperty(animationTop, new PropertyPath(Canvas.TopProperty));
Storyboard.SetTarget(animationLeft, uimessage);
Storyboard.SetTargetProperty(animationLeft, new PropertyPath(Canvas.LeftProperty));
return(board);
}
/// <summary>
/// Gets the sender receiver.
/// </summary>
/// <param name="edge">The edge.</param>
/// <param name="message">The message.</param>
/// <param name="receiver">The receiver.</param>
/// <param name="sender">The sender.</param>
private static void GetMessageReceiverSender(
NetSimConnection edge,
ConnectionFrameMessage message,
out INetSimVisualizableItem receiver,
out INetSimVisualizableItem sender)
{
// receiver = (edge.EndPointA.Id.Equals(message.NextReceiver) ? edge.EndPointA : edge.EndPointB) as INetSimVisualizableItem;
receiver =
(edge.EndPointA.Id.Equals(message.Receiver) ? edge.EndPointA : edge.EndPointB) as
INetSimVisualizableItem;
sender = ((receiver == edge.EndPointA) ? edge.EndPointB : edge.EndPointA) as INetSimVisualizableItem;
}
/// <summary>
/// Creates the connection tooltip.
/// </summary>
/// <param name="edge">The edge.</param>
/// <returns>The text for the connection tooltip.</returns>
private string CreateConnectionTooltip(NetSimConnection edge)
{
if (edge == null)
{
return(string.Empty);
}
StringBuilder builder = new StringBuilder();
foreach (var message in edge.PendingMessages)
{
builder.AppendLine(message.ToString());
}
return(builder.ToString());
}
/// <summary>
/// Handles the mouse left button up.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="mouseButtonEventArgs">The <see cref="MouseButtonEventArgs"/> instance containing the event data.</param>
public void HandleMouseLeftButtonUp(object sender, MouseButtonEventArgs mouseButtonEventArgs)
{
if (this.IsCreateNode && this.CurrentSelectedNode == null)
{
this.AddNode(mouseButtonEventArgs.GetPosition(this.DrawCanvas));
}
if (this.IsCreateEdge && this.draftConnection?.EndPointA != null && this.draftConnection?.EndPointB != null)
{
this.AddEdge(this.draftConnection.EndPointA as NetSimItem, this.draftConnection.EndPointB as NetSimItem);
this.draftConnection = null;
}
else
{
this.draftConnection = null;
this.DrawCanvas.Children.Remove(this.draftConnectionLine);
this.draftConnectionLine = null;
}
}
/// <summary>
/// Handles the mouse left button down.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="mouseButtonEventArgs">The <see cref="MouseButtonEventArgs"/> instance containing the event data.</param>
public void HandleMouseLeftButtonDown(object sender, MouseButtonEventArgs mouseButtonEventArgs)
{
var item = this.GetCurrentItem(mouseButtonEventArgs.GetPosition(this.DrawCanvas));
if (item == null)
{
if (this.IsView)
{
this.CurrentViewedItem = null;
}
return;
}
// ReSharper disable once CanBeReplacedWithTryCastAndCheckForNull
if (item is NetSimClient)
{
this.CurrentSelectedNode = item;
switch (this.viewMode)
{
case ViewMode.CreateEdges:
this.draftConnection = new NetSimConnection {
EndPointA = (NetSimClient)item
};
break;
case ViewMode.View:
this.CurrentViewedItem = item;
break;
}
}
if (item is NetSimConnection)
{
if (this.IsView)
{
this.CurrentViewedItem = item;
}
}
}
/// <summary>
/// Adds the edge.
/// </summary>
/// <param name="from">From item.</param>
/// <param name="to">To item.</param>
public void AddEdge(NetSimItem from, NetSimItem to)
{
try
{
lock (this.simulationLockObj)
{
if (!this.Simulator.AddConnection(from.Id, to.Id, 1))
{
this.draftConnection = null;
this.DrawCanvas.Children.Remove(this.draftConnectionLine);
this.draftConnectionLine = null;
}
}
this.CheckCanExecuteCommands();
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
this.draftConnection = null;
this.DrawCanvas.Children.Remove(this.draftConnectionLine);
this.draftConnectionLine = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ConnectionViewModel"/> class.
/// </summary>
/// <param name="connection">The connection.</param>
public ConnectionViewModel(NetSimConnection connection)
{
this.Connection = connection;
this.InitializeCommands();
}
/// <summary>
/// Adds the message.
/// </summary>
/// <param name="edge">The edge.</param>
/// <param name="message">The message.</param>
private void AddMessage(NetSimConnection edge, ConnectionFrameMessage message)
{
INetSimVisualizableItem receiver;
INetSimVisualizableItem sender;
// get message receiver and sender
GetMessageReceiverSender(edge, message, out receiver, out sender);
var uimessage = new MessageControl(message.ShortName)
{
Width = 19,
Height = 19,
Tag = edge,
MessagePath = { Tag = edge }
};
// set message to sender location
int top = sender.Location.Top;
int left = sender.Location.Left;
if (this.IsMessageSendingAnimationDone(message.Id))
{
// calculate middle between A and B
top = (edge.EndPointA.Location.Top + edge.EndPointB.Location.Top) / 2;
left = (edge.EndPointA.Location.Left + edge.EndPointB.Location.Left) / 2;
}
// add meesage to this position
Canvas.SetLeft(uimessage, left);
Canvas.SetTop(uimessage, top);
this.drawCanvas.Children.Add(uimessage);
Storyboard storyBoard = null;
if (message.TransmissionStep == NetSimMessageTransmissionStep.Sending)
{
if (!this.IsMessageSendingAnimationDone(message.Id))
{
storyBoard = CreateMessageAnimation(edge, message, uimessage, NetSimMessageTransmissionStep.Sending);
// messageStates[message.Id] = NetSimMessageTransmissionStep.Sending;
}
}
else
{
if (!this.IsMessageReceivingAnimationDone(message.Id))
{
storyBoard = CreateMessageAnimation(
edge,
message,
uimessage,
NetSimMessageTransmissionStep.Receiving);
// messageStates[message.Id] = NetSimMessageTransmissionStep.Receiving;
}
}
if (storyBoard == null)
{
return;
}
// when the animation has finished - mark animation as done
// note: animation gets created multiple times - but only at last "redraw"
// it has time to finish
storyBoard.Completed += (s, e) => { this.messageStates[message.Id] = message.TransmissionStep; };
uimessage.BeginStoryboard(storyBoard);
// start the animation
storyBoard.Begin();
}