protected override void OnPoint_PositionChanged(object sender, PositionChangedEventArgs e)
{
DraggablePoint marker = (DraggablePoint)sender;
// adjusting position to fit inside allowed region
var region = AllowedRegion;
var position = e.Position;
if (position.X < region.XMin)
{
position.X = region.XMin;
}
if (position.Y < region.YMin)
{
position.Y = region.YMin;
}
if (position.X > region.XMax)
{
position.X = region.XMax;
}
if (position.Y > region.YMax)
{
position.Y = region.YMax;
}
marker.Position = position;
marker.DataContext = position;
var index = DevMarkerChart.GetIndex(marker);
if (0 <= index && index < Points.Count && !ProtectedPoints.Changing)
{
Points[index] = position;
}
}
protected virtual void OnPoint_PositionChanged(object sender, PositionChangedEventArgs e)
{
FrameworkElement marker = (FrameworkElement)sender;
var index = DevMarkerChart.GetIndex(marker);
marker.DataContext = e.Position;
if (0 <= index && index < points.Count && !points.Changing)
{
points[index] = e.Position;
}
}
private void element_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
FrameworkElement clickedElement = (FrameworkElement)sender;
int index = DevMarkerChart.GetIndex(clickedElement);
if (index >= 0)
{
Point point = selector.Points[index];
selector.Points.RemoveAt(index);
//plotter.UndoProvider.AddAction(new CollectionRemoveAction<Point>(selector.Points, point, index));
e.Handled = true;
}
}
public void TestAddAndRemoveItems()
{
ChartPlotter plotter = new ChartPlotter();
plotter.PerformLoad();
DevMarkerChart chart = new DevMarkerChart();
chart.MarkerBuilder = new EllipseMarker();
plotter.Children.Add(chart);
ObservableCollection <Point> source = new ObservableCollection <Point>();
chart.ItemsSource = source;
const int count = 10;
// stage 1
for (int i = 0; i < count; i++)
{
source.Add(new Point());
Assert.AreEqual(source.Count, chart.Items.Count);
}
for (int i = count - 1; i >= 0; i--)
{
source.RemoveAt(i);
Assert.AreEqual(source.Count, chart.Items.Count);
}
// stage 2
for (int i = 0; i < count; i++)
{
source.Add(new Point());
Assert.AreEqual(source.Count, chart.Items.Count);
}
Random rnd = new Random();
for (int i = count - 1; i >= 0; i--)
{
int index = rnd.Next(0, source.Count - 1);
source.RemoveAt(index);
Assert.AreEqual(source.Count, chart.Items.Count);
}
// todo check that all items are visible
}
