private void AddRouter(String MAC, double x, double y)
{
var newThumb = new MyThumb(MAC);
Vertex.Add(newThumb);
newThumb.Template = Resources["template1"] as ControlTemplate;
newThumb.ApplyTemplate();
newThumb.DragDelta += OnDragDelta;
myCanvas.Children.Add(newThumb);
var img = (Image)newThumb.Template.FindName("tplImage", newThumb);
img.Source = new BitmapImage(new Uri("Images/router.png", UriKind.Relative));
var txt = (TextBlock)newThumb.Template.FindName("tplTextBlock", newThumb);
txt.Text = MAC;
Canvas.SetLeft(newThumb, x);
Canvas.SetTop(newThumb, y);
Panel.SetZIndex(newThumb, 1);
newThumb.UpdateLayout();
Mouse.OverrideCursor = null;
}
// This method updates all the starting and ending lines assigned for the given thumb
// according to the latest known thumb position on the canvas
private static void UpdateLines(MyThumb thumb)
{
var left = Canvas.GetLeft(thumb);
var top = Canvas.GetTop(thumb);
foreach (var line in thumb.StartLines)
{
line.StartPoint = new Point(left + thumb.ActualWidth / 2, top + thumb.ActualHeight / 2);
}
foreach (var line in thumb.EndLines)
{
line.EndPoint = new Point(left + thumb.ActualWidth / 2, top + thumb.ActualHeight / 2);
}
}
// Event handler for creating new thumb element by left mouse click
// and visually connecting it to the myThumb2 element
private void Window1PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (!_isAddNew)
{
return;
}
// Create new thumb object
var newThumb = new MyThumb("example");
// Assign our custom template to it
newThumb.Template = Resources["template1"] as ControlTemplate;
// Calling ApplyTemplate enables us to navigate the visual tree right now (important!)
newThumb.ApplyTemplate();
// Add the "onDragDelta" event handler that is common to all objects
newThumb.DragDelta += OnDragDelta;
// Put newly created thumb on the canvas
myCanvas.Children.Add(newThumb);
// Access the image element of our custom template and assign it to the new image
var img = (Image)newThumb.Template.FindName("tplImage", newThumb);
img.Source = new BitmapImage(new Uri("Images/router.png", UriKind.Relative));
// Access the textblock element of template and change it too
var txt = (TextBlock)newThumb.Template.FindName("tplTextBlock", newThumb);
txt.Text = "System action";
// Set the position of the object according to the mouse pointer
var position = e.GetPosition(this);
Canvas.SetLeft(newThumb, position.X);
Canvas.SetTop(newThumb, position.Y);
// Move our thumb to the front to be over the lines
Panel.SetZIndex(newThumb, 1);
// Manually update the layout of the thumb (important!)
newThumb.UpdateLayout();
// Create new path and put it on the canvas
var newPath = new Path {
Stroke = Brushes.Black, StrokeThickness = 1
};
myCanvas.Children.Add(newPath);
// Create new line geometry element and assign the path to it
var newLine = new LineGeometry();
newPath.Data = newLine;
// Predefined "myThumb2" element will host the starting point
// Our new thumb will host the ending point of the line
_isAddNew = false;
Mouse.OverrideCursor = null;
btnNewAction.IsEnabled = true;
e.Handled = true;
}