/// <summary>
/// Updates the needle rotation, the trail, and the value text according to the new value.
/// </summary>
private static void OnValueChanged(DependencyObject d)
{
RadialGauge c = (RadialGauge)d;
if (!Double.IsNaN(c.Value))
{
var middleOfScale = 100 - ScalePadding - c.ScaleWidth / 2;
var valueText = c.GetTemplateChild(ValueTextPartName) as TextBlock;
c.ValueAngle = c.ValueToAngle(c.Value);
// Needle
if (c._needle != null)
{
c._needle.RotationAngleInDegrees = (float)c.ValueAngle;
}
// Trail
var trail = c.GetTemplateChild(TrailPartName) as Path;
if (trail != null)
{
if (c.ValueAngle > MinAngle)
{
trail.Visibility = Visibility.Visible;
var pg = new PathGeometry();
var pf = new PathFigure();
pf.IsClosed = false;
pf.StartPoint = c.ScalePoint(MinAngle, middleOfScale);
var seg = new ArcSegment();
seg.SweepDirection = SweepDirection.Clockwise;
// We start from -150, so +30 becomes a large arc.
seg.IsLargeArc = c.ValueAngle > (180 + MinAngle);
seg.Size = new Size(middleOfScale, middleOfScale);
seg.Point = c.ScalePoint(Math.Min(c.ValueAngle, MaxAngle), middleOfScale); // On overflow, stop trail at MaxAngle.
pf.Segments.Add(seg);
pg.Figures.Add(pf);
trail.Data = pg;
}
else
{
trail.Visibility = Visibility.Collapsed;
}
}
// Value Text
if (valueText != null)
{
valueText.Text = c.Value.ToString(c.ValueStringFormat);
}
}
}
private void SquareOfOldPage_Loaded(object sender, RoutedEventArgs e)
{
var random = new Random((int)DateTime.Now.Ticks);
foreach (var square in SquareOfSquares.Squares)
{
var gauge = new XamlBrewer.Uwp.Controls.RadialGauge() { Height = square.ActualHeight, Width = square.ActualWidth };
gauge.TrailBrush = new SolidColorBrush(square.RandomColor());
gauge.TickBrush = new SolidColorBrush(square.RandomColor());
gauge.ScaleTickBrush = App.Current.Resources["PageBackgroundBrush"] as SolidColorBrush;
gauge.NeedleBrush = App.Current.Resources["NeedleBrush"] as SolidColorBrush;
gauge.ValueBrush = gauge.TrailBrush;
gauge.Maximum = 50;
gauge.TickSpacing = 5;
gauge.ScaleWidth = random.Next(5, 77);
gauge.Maximum = 50;
var side = square.Side();
gauge.Value = side;
square.Content = gauge;
}
}
private void SquareOfOldPage_Loaded(object sender, RoutedEventArgs e)
{
var random = new Random((int)DateTime.Now.Ticks);
foreach (var square in SquareOfSquares.Squares)
{
var gauge = new XamlBrewer.Uwp.Controls.RadialGauge()
{
Height = square.ActualHeight, Width = square.ActualWidth
};
gauge.TrailBrush = new SolidColorBrush(square.RandomColor());
gauge.TickBrush = new SolidColorBrush(square.RandomColor());
gauge.ScaleTickBrush = App.Current.Resources["PageBackgroundBrush"] as SolidColorBrush;
gauge.NeedleBrush = App.Current.Resources["NeedleBrush"] as SolidColorBrush;
gauge.ValueBrush = gauge.TrailBrush;
gauge.Maximum = 50;
gauge.TickSpacing = 5;
gauge.ScaleWidth = random.Next(5, 77);
gauge.Maximum = 50;
var side = square.Side();
gauge.Value = side;
square.Content = gauge;
}
}
