internal void Draw()
{
if (!IsControlLaoded) return;
//No cache for you gauge :( kill and redraw please
foreach (var child in Canvas.Children.Cast<UIElement>()
.Where(x => !Equals(x, Stick) && !(x is AngularSection) && !(x is PieSlice)).ToArray())
Canvas.Children.Remove(child);
Wedge = Wedge > 360 ? 360 : (Wedge < 0 ? 0 : Wedge);
var fromAlpha = (360-Wedge)*.5;
var toAlpha = 360 - fromAlpha;
var d = ActualWidth < ActualHeight ? ActualWidth : ActualHeight;
Stick.Height = d*.5*.8;
Stick.Width = Stick.Height*.2;
Canvas.SetLeft(Stick, ActualWidth*.5 - Stick.Width*.5);
Canvas.SetTop(Stick, ActualHeight*.5 - Stick.Height*.9);
var ticksHi = d*.5;
var ticksHj = d*.47;
var labelsHj = d*.44;
foreach (var section in Sections)
{
PieSlice slice;
section.Owner = this;
if (!Slices.TryGetValue(section, out slice))
{
slice = new PieSlice();
Slices[section] = slice;
}
var p = (Canvas)section.Parent;
if (p != null) p.Children.Remove(section);
Canvas.Children.Add(section);
var ps = (Canvas)slice.Parent;
if (ps != null) ps.Children.Remove(slice);
Canvas.Children.Add(slice);
}
UpdateSections();
for (var i = FromValue; i <= ToValue; i += TicksStep)
{
var alpha = LinearInterpolation(fromAlpha, toAlpha, FromValue, ToValue, i) + 90;
var tick = new Line
{
X1 = ActualWidth*.5 + ticksHi*Math.Cos(alpha*Math.PI/180),
X2 = ActualWidth*.5 + ticksHj*Math.Cos(alpha*Math.PI/180),
Y1 = ActualHeight*.5 + ticksHi*Math.Sin(alpha*Math.PI/180),
Y2 = ActualHeight*.5 + ticksHj*Math.Sin(alpha*Math.PI/180)
};
Canvas.Children.Add(tick);
tick.SetBinding(Shape.StrokeProperty,
new Binding {Path = new PropertyPath(TicksForegroundProperty), Source = this});
tick.SetBinding(Shape.StrokeThicknessProperty,
new Binding { Path = new PropertyPath(TicksStrokeThicknessProperty), Source = this });
}
for (var i = FromValue; i <= ToValue; i += LabelsStep)
{
var alpha = LinearInterpolation(fromAlpha, toAlpha, FromValue, ToValue, i) + 90;
var tick = new Line
{
X1 = ActualWidth*.5 + ticksHi*Math.Cos(alpha*Math.PI/180),
X2 = ActualWidth*.5 + labelsHj*Math.Cos(alpha*Math.PI/180),
Y1 = ActualHeight*.5 + ticksHi*Math.Sin(alpha*Math.PI/180),
Y2 = ActualHeight*.5 + labelsHj*Math.Sin(alpha*Math.PI/180)
};
Canvas.Children.Add(tick);
var label = new TextBlock
{
Text = LabelFormatter(i)
};
label.SetBinding(EffectProperty,
new Binding {Path = new PropertyPath(LabelsEffectProperty), Source = this});
Canvas.Children.Add(label);
label.UpdateLayout();
Canvas.SetLeft(label, alpha < 270
? tick.X2
: (Math.Abs(alpha - 270) < 4
? tick.X2 - label.ActualWidth*.5
: tick.X2 - label.ActualWidth));
Canvas.SetTop(label, tick.Y2);
tick.SetBinding(Shape.StrokeProperty,
new Binding { Path = new PropertyPath(TicksForegroundProperty), Source = this });
tick.SetBinding(Shape.StrokeThicknessProperty,
new Binding { Path = new PropertyPath(TicksStrokeThicknessProperty), Source = this });
}
MoveStick();
}
public Gauge()
{
Canvas = new Canvas {ClipToBounds = true};
Content = Canvas;
PieBack = new PieSlice();
Pie = new PieSlice();
TitleTextBlock = new TextBlock();
MeasureTextBlock = new TextBlock();
LeftLabel = new TextBlock();
RightLabel = new TextBlock();
Canvas.Children.Add(PieBack);
Canvas.Children.Add(Pie);
Canvas.Children.Add(TitleTextBlock);
Canvas.Children.Add(MeasureTextBlock);
Canvas.Children.Add(RightLabel);
Canvas.Children.Add(LeftLabel);
Panel.SetZIndex(PieBack, 0);
Panel.SetZIndex(Pie, 1);
Canvas.SetBinding(WidthProperty,
new Binding {Path = new PropertyPath(WidthProperty), Source = this});
Canvas.SetBinding(HeightProperty,
new Binding {Path = new PropertyPath(HeightProperty), Source = this});
PieBack.SetBinding(Shape.FillProperty,
new Binding {Path = new PropertyPath(GaugeBackgroundProperty), Source = this});
PieBack.SetBinding(Shape.StrokeThicknessProperty,
new Binding {Path = new PropertyPath(StrokeThicknessProperty), Source = this});
PieBack.SetBinding(Shape.StrokeProperty,
new Binding {Path = new PropertyPath(StrokeProperty), Source = this});
Pie.SetBinding(Shape.StrokeThicknessProperty,
new Binding { Path = new PropertyPath(StrokeThicknessProperty), Source = this });
Pie.Stroke = Brushes.Transparent;
TitleTextBlock.SetBinding(TextBlock.TextProperty,
new Binding { Path = new PropertyPath(TitleProperty), Source = this });
SetValue(GaugeBackgroundProperty, new SolidColorBrush(Color.FromRgb(21, 101, 191)) {Opacity = .1});
SetValue(StrokeThicknessProperty, 0d);
SetValue(StrokeProperty, new SolidColorBrush(Color.FromRgb(222, 222, 222)));
SetValue(ToColorProperty, Color.FromRgb(100, 180, 245));
SetValue(FromColorProperty, Color.FromRgb(21, 101, 191));
SetValue(MinHeightProperty, 50d);
SetValue(MinWidthProperty, 80d);
SetValue(AnimationsSpeedProperty, TimeSpan.FromMilliseconds(800));
MeasureTextBlock.FontWeight = FontWeights.Bold;
IsNew = true;
SizeChanged += (sender, args) =>
{
IsChartInitialized = true;
Update();
};
}
