private void InitializeMouseEventHandlers()
{
OnCircleMouseLeftButtonDown = (s, args) =>
{
if (_currentMode == Mode.Default)
{
var c = s as Circle;
c.Opacity = MovingOpacity;
Mouse.Capture(c.UIElements.Where(x => x is Ellipse).FirstOrDefault() as UIElement);
}
else if (_currentMode == Mode.Delete)
{
var c = s as Circle;
canvas.Children.Remove(c);
graph.RemoveNode(_circleNodeMap[c]);
_circles.Remove(c);
_circleNodeMap.Remove(c);
c.Dispose();
}
else if (_currentMode == Mode.Send)
{
var start = s as Circle;
start.Fill = CommunicatingCircleFill.Clone();
_tempLine = new Shapes.Line(start,
Circle.Empty,
new SolidColorBrush(Colors.Red),
new SolidColorBrush(Colors.Red),
MovingOpacity, LineThickness, SendLineDashLength);
canvas.Children.Add(_tempLine);
}
};
OnCircleMouseLeftButtonUp = (s, args) =>
{
if (_currentMode == Mode.Default)
{
var c = s as Circle;
Mouse.Capture(null);
c.Opacity = StationaryOpacity;
if (!_circleNodeMap.ContainsKey(c))
{
var node = new Node <string>(c.Text);
_circleNodeMap.Add(c, node);
_circles.Add(c);
graph.AddNode(node);
}
}
else if (_currentMode == Mode.Send)
{
var c = s as Circle;
if (_tempLine == null || _tempLine.Start == c)
{
return;
}
ResetCircleStyle(_tempLine.Start);
ResetCircleStyle(c);
// send a packet from _tempLine.Start to _tempLine.End
var startNode = _circleNodeMap[_tempLine.Start];
var endNode = _circleNodeMap[c];
try
{
var path = graph.FindShortestPath(startNode, endNode).ToArray();
var lines = new List <Shapes.Line>();
for (int i = 0; i < path.Length - 1; i++)
{
var line = _lineNodeMap.Where(x => (x.Value.Item1 == path[i] && x.Value.Item2 == path[i + 1]) ||
(x.Value.Item1 == path[i + 1] && x.Value.Item2 == path[i])
)
.Select(x => x.Key)
.FirstOrDefault();
lines.Add(line);
}
ResetAllStyles();
var circles = _circleNodeMap.Where(x => path.Contains(x.Value)).Select(x => x.Key);
foreach (var line in lines)
{
line.Stroke = PathLineStroke;
line.Thickness = PathLineThickness;
}
foreach (var circle in circles)
{
circle.Fill = CommunicatingCircleFill;
}
}
catch (PathDoesNotExistException)
{
MessageBox.Show("The selected routers are not connected.", "No connection", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
};
OnCircleMouseEnter = (s, args) =>
{
if (_currentMode == Mode.Default)
{
this.Cursor = Cursors.Hand;
DisableCanvasMouseEvents();
if (_tempLine != null)
{
_tempLine.End.PositionCenter = (s as Circle).PositionCenter;
}
}
else if (_currentMode == Mode.Delete)
{
this.Cursor = Cursors.No;
}
else if (_currentMode == Mode.Send)
{
var c = s as Circle;
if (_tempLine != null)
{
_tempLine.End.PositionCenter = c.PositionCenter;
if (c != _tempLine.Start)
{
c.Fill = CommunicatingCircleFill.Clone();
}
}
}
};
OnCircleMouseLeave = (s, args) =>
{
if (_currentMode == Mode.Default)
{
this.Cursor = Cursors.Arrow;
EnableCanvasMouseEvents();
}
else if (_currentMode == Mode.Delete)
{
this.Cursor = Cursors.Arrow;
}
else if (_currentMode == Mode.Send)
{
var c = s as Circle;
if (_tempLine != null && _tempLine.Start != c)
{
ResetCircleStyle(c);
}
}
};
OnCircleMouseMove = (s, args) =>
{
if (_currentMode == Mode.Default)
{
var c = s as Circle;
var pos = args.GetPosition(canvas);
if (pos.X < CircleRadius)
{
pos.X = CircleRadius;
}
if (pos.X >= canvas.ActualWidth - CircleRadius)
{
pos.X = canvas.ActualWidth - CircleRadius;
}
if (pos.Y < CircleRadius)
{
pos.Y = CircleRadius;
}
if (pos.Y >= canvas.ActualHeight - CircleRadius)
{
pos.Y = canvas.ActualHeight - CircleRadius;
}
if (Mouse.Captured == c.UIElements.Where(x => x is Ellipse).FirstOrDefault())
{
c.PositionCenter = pos;
}
if (_tempLine != null)
{
_tempLine.End.PositionCenter = (s as Circle).PositionCenter;
args.Handled = true;
}
}
else if (_currentMode == Mode.Send)
{
if (_tempLine != null)
{
_tempLine.End.PositionCenter = (s as Circle).PositionCenter;
args.Handled = true;
}
}
};
OnEmptyCircleMouseMove += (sender, args) =>
{
var pos = args.GetPosition(canvas);
if (_currentMode == Mode.Default)
{
if (pos.X < 0)
{
pos.X = 0;
}
if (pos.X >= canvas.ActualWidth)
{
pos.X = canvas.ActualWidth - 1;
}
if (pos.Y < 0)
{
pos.Y = 0;
}
if (pos.Y >= canvas.ActualHeight)
{
pos.Y = canvas.ActualHeight - 1;
}
if (_tempLine == null)
{
return;
}
if (args.RightButton == MouseButtonState.Pressed)
{
_tempLine.End.PositionCenter = pos;
}
else
{
_tempLine = null;
}
}
else if (_currentMode == Mode.Send)
{
if (_tempLine != null)
{
_tempLine.End.PositionCenter = pos;
}
}
};
OnCircleMouseRightButtonDown = (s, args) =>
{
if (_currentMode == Mode.Default)
{
var start = s as Circle;
_tempLine = new Shapes.Line(start,
Circle.Empty,
LineStroke,
LineStroke,
LineThickness,
MovingOpacity);
_tempLine.Disposing += (sender, e) =>
{
canvas.Children.Remove(sender as Shapes.Line);
};
_tempLine.DragStart += (sender, e) =>
{
if (_currentMode == Mode.Default)
{
(sender as Shapes.Line).Opacity = MovingOpacity;
}
};
_tempLine.DragEnd += (sender, e) =>
{
if (_currentMode == Mode.Default)
{
(sender as Shapes.Line).Opacity = StationaryOpacity;
}
};
canvas.Children.Add(_tempLine);
}
};
OnCircleMouseRightButtonUp = (s, args) =>
{
if (_currentMode == Mode.Default)
{
if (_tempLine == null)
{
return;
}
var c = s as Circle;
if (_tempLine.Start == c)
{
return;
}
var window = new IntegerInputWindow(this);
window.InputEntered += (sender, e) =>
{
_tempLine.LabelText = e.ToString();
_tempLine.End = c;
_tempLine.Opacity = StationaryOpacity;
_lines.Add(_tempLine);
var startNode = _circleNodeMap[_tempLine.Start];
var endNode = _circleNodeMap[_tempLine.End];
_lineNodeMap.Add(_tempLine,
new Tuple <Node <string>, Node <string> >(startNode, endNode));
graph.AddEdge(startNode, endNode, e);
_tempLine = null;
};
window.ShowDialog();
}
};
OnEmptyCircleMouseRightButtonUp = (s, args) =>
{
if (_currentMode == Mode.Default)
{
if (_tempLine != null)
{
canvas.Children.Remove(_tempLine);
}
_tempLine = null;
}
};
OnEmptyCircleMouseLeftButtonUp = (s, args) =>
{
if (_currentMode == Mode.Send)
{
if (_tempLine != null)
{
canvas.Children.Remove(_tempLine);
}
_tempLine = null;
}
};
}