private void AddIndicator(SerialGraph graph) {
Indicator indicator = new Indicator();
Binding fillBinding = new Binding("Brush");
fillBinding.Source = graph;
indicator.SetBinding(Indicator.FillProperty, fillBinding);
Binding strokeBinding = new Binding("PlotAreaBackground");
strokeBinding.Source = this;
indicator.SetBinding(Indicator.StrokeProperty, strokeBinding);
#if WINDOWS_PHONE
indicator.ManipulationStarted += new EventHandler<ManipulationStartedEventArgs>(OnIndicatorManipulationStarted);
#else
indicator.MouseEnter += new MouseEventHandler(OnIndicatorMouseEnter);
indicator.MouseLeave += new MouseEventHandler(OnIndicatorMouseLeave);
#endif
_indicators.Add(graph, indicator);
AddIndicatorToCanvas(indicator);
}
private void DisplayBalloon(Indicator indicator) {
_balloon.Text = indicator.Text;
_balloon.Visibility = Visibility.Visible;
_balloon.Measure(new Size(_graphCanvasDecorator.ActualWidth, _graphCanvasDecorator.ActualHeight));
double balloonLeft = (double)indicator.GetValue(Canvas.LeftProperty) - _balloon.DesiredSize.Width / 2 + indicator.ActualWidth / 2;
if (balloonLeft < 0) {
balloonLeft = (double)indicator.GetValue(Canvas.LeftProperty);
}
else if (balloonLeft + _balloon.DesiredSize.Width > _graphCanvasDecorator.ActualWidth) {
balloonLeft = (double)indicator.GetValue(Canvas.LeftProperty) - _balloon.DesiredSize.Width;
}
double balloonTop = (double)indicator.GetValue(Canvas.TopProperty) - _balloon.DesiredSize.Height - 5;
if (balloonTop < 0) {
balloonTop = (double)indicator.GetValue(Canvas.TopProperty) + 17;
}
_balloon.SetValue(Canvas.LeftProperty, balloonLeft);
_balloon.SetValue(Canvas.TopProperty, balloonTop);
}
private void AddIndicatorToCanvas(Indicator indicator) {
if (_graphCanvas != null) {
_graphCanvas.Children.Add(indicator);
}
}