protected override void UpdateCore()
{
if (Viewport == null || Viewport.Output == new Rect(0, 0, 0, 0) || DataSource == null)
{
return;
}
foreach (var m in Markers)
{
Plotter.MainCanvas.Children.Remove(m);
}
if (Markers.Count == 0)
{
return;
}
var transform = GetTransform();
for (int i = 0; i < Markers.Count; i++)
{
var offset = GetXValue(this);
double X = LineGraphWithPoints.GetXValue(Markers[i] as DependencyObject) + GetXValue(this);
double Y = LineGraphWithPoints.GetYValue(Markers[i] as DependencyObject);
var p = transform.DataToScreen(new Point(X, Y));
//Update the points
double canvasy = p.Y - Markers[i].Height / 2;
double canvasx = p.X - Markers[i].Width / 2;
Canvas.SetTop(Markers[i], canvasy);
Canvas.SetLeft(Markers[i], canvasx);
if (canvasy < Plotter.MainCanvas.ActualHeight & canvasy > 0 & canvasx < Plotter.MainCanvas.ActualWidth & canvasx > 0)
{
Plotter.MainCanvas.Children.Add(Markers[i]);
}
}
ContentBounds = BoundsHelper.GetViewportBounds(GetPoints(), transform.DataTransform);
base.UpdateCore();
}
protected override void UpdateItems()
{
if (Plotter != null)
{
foreach (var m in Markers)
{
Plotter.MainCanvas.Children.Remove(m);
}
Markers.Clear();
if (ItemsSource != null && ItemsSource.GetEnumerator().MoveNext())
{
foreach (var p in ItemsSource)
{
var visualItem = this.ItemTemplate.LoadContent() as FrameworkElement;
visualItem.DataContext = p;
//Set the binding again to make it attach immediately
visualItem.SetBinding(LineGraphWithPoints.XValueProperty, visualItem.GetBindingExpression(LineGraphWithPoints.XValueProperty).ParentBinding);
visualItem.SetBinding(LineGraphWithPoints.YValueProperty, visualItem.GetBindingExpression(LineGraphWithPoints.YValueProperty).ParentBinding);
Markers.Add(visualItem);
}
var es = new Microsoft.Research.DynamicDataDisplay.DataSources.EnumerableDataSource <DependencyObject>(Markers);
es.SetXMapping(p => LineGraphWithPoints.GetXValue(p as DependencyObject) + GetXValue(this));
es.SetYMapping(p => LineGraphWithPoints.GetYValue(p as DependencyObject));
DataSource = es;
if (Viewport != null & Markers.Count > 1)
{
((ChartPlotter)Viewport.Plotter).FitToView();
}
}
}
}
