private void UserControl_DataContextChanged(FrameworkElement sender, DataContextChangedEventArgs args)
{
Graph.ClearSeries();
var item = DataContext as ChartSong;
if (item == null) return;
var color = Colors.White;
switch (item.ChangeDirection)
{
case ChartSong.Direction.Up:
color = Colors.Green;
break;
case ChartSong.Direction.Down:
color = Colors.Red;
break;
}
ChangePercentBlock.Foreground = new SolidColorBrush(color);
var data = item.Signals.Select((p, i) => new Point(i, p)).ToList();
var serie = new Serie("Signals") {ShiftSize = 100};
serie.SetData(data);
Graph.AutoRedraw = true;
Graph.AddSerie(serie);
}
public ChartSongViewer()
{
InitializeComponent();
if (!ViewModelBase.IsInDesignModeStatic) return;
var data =
new[] { 0, 1, 5, -3, -1, 0, 2.5, 2.4, 2.3 }.Select((p, i) => new Point(i, p)).ToList();
var serie = new Serie("Signals") { ShiftSize = 100};
serie.SetData(data);
Graph.AutoRedraw = true;
Graph.AddSerie(serie);
}
public void AddSerie(Serie s)
{
if (s != null)
{
s.Color = _colors.Dequeue();
_series.Add(s);
s.DataUpdated += SerieDataUpdated;
if (_loaded)
{
Draw();
}
}
}
private void RemoveLine(Serie s)
{
Children.Remove(s.UiElement);
}
public void RemoveSerie(Serie s)
{
RemoveLine(s);
_series.Remove(s);
}
private void DrawLine(Serie serie)
{
//this.InvalidateMeasure(); not sure why anymore...
RemoveLine(serie);
var height = ActualHeight - (2*DrawAreaVerticalOffset);
var width = ActualWidth - (2*DrawAreaHorizontalOffset);
_drawAreaBottom = 0 + height + DrawAreaVerticalOffset;
// bottom left of drawing area, add 1 so the offset gets added below
_drawAreaLeft = 0 + DrawAreaHorizontalOffset; // left of drawing area, add 1 so the offset gets added left
_divisionX = (width/(_seriesMaxX - _seriesMinX));
Debug.WriteLine("{0} : {1} / ({2} - {3}) = {4}", Name, width, _seriesMaxX, _seriesMinX, _divisionX);
_divisionY = (height/(_seriesMaxY - _seriesMinY));
var myPath = new Path();
var myPathFigure = new PathFigure();
var myPathSegmentCollection = new PathSegmentCollection();
var myPathFigureCollection = new PathFigureCollection();
var myPathGeometry = new PathGeometry();
Point p;
// prepare for drawing by modifying y value
for (var i = 0; i < serie.Data.Count; i++) // for every datapoint in the serie
{
p = serie.Data[i];
p.X = _drawAreaLeft + (_divisionX*i);
p.Y = _drawAreaBottom - ((p.Y - _seriesMinY)*_divisionY);
// data[i] = p; NO - Keep serie data unchanged
Debug.WriteLine("{0} : ({1}) * {2} = {3}", Name, serie.Data[i], i, p.X);
if (i == 0)
{
myPathFigure.StartPoint = p;
}
else
{
var segment = new LineSegment {Point = p};
myPathSegmentCollection.Add(segment);
}
}
if (Fill) // not fully tested
{
p.Y = _drawAreaBottom - 0;
var endsegment = new LineSegment {Point = p};
myPathSegmentCollection.Add(endsegment);
}
myPathFigure.Segments = myPathSegmentCollection;
myPathFigureCollection.Add(myPathFigure);
myPathGeometry.Figures = myPathFigureCollection;
myPath.Stroke = serie.Color;
myPath.StrokeThickness = 2;
if (Fill)
{
myPath.Fill = serie.Color;
}
myPath.Data = myPathGeometry;
SetZIndex(myPath, 10);
Children.Add(myPath);
serie.UiElement = myPath;
}