/// <summary>
/// Translates a point from the chart dimension to the drawing canvas pixel dimension
/// </summary>
/// <param name="canvasInfo">Information about the canvas and its transformations</param>
/// <param name="valuePoint">A point in the chart with real plot values</param>
/// <returns>A point in the drawing canvas with pixel values</returns>
public static Point ToPixel(CanvasTransformInfo canvasInfo, Point valuePoint)
{
Canvas canvas = canvasInfo.Canvas;
Point scaledMaxPoint = canvasInfo.ScaledMaxPoint;
Point scaledMinPoint = canvasInfo.ScaledMinPoint;
double scaleX = 0.0;
double scaleY = 0.0;
var canvasSize = new Size(canvas.ActualWidth, canvas.ActualHeight);
if (scaledMaxPoint.X != scaledMinPoint.X)
{
scaleX = canvasSize.Width / (scaledMaxPoint.X - scaledMinPoint.X);
}
if (scaledMaxPoint.Y != scaledMinPoint.Y)
{
scaleY = canvasSize.Height / (scaledMaxPoint.Y - scaledMinPoint.Y);
}
double xPos = (valuePoint.X - scaledMinPoint.X) * scaleX;
double yPos = (valuePoint.Y - scaledMinPoint.Y) * scaleY;
return(new Point(xPos, yPos));
}
///// <summary>
///// Convert a DataStream of values into a ChartData object which can be fed into the charts and displayed.
///// The default behaviour is to create a smoothed copy and add along with the original data.
///// The original data is colored Gray and the smoothed data Red by default.7
///// </summary>
///// <param name="stream"></param>
///// <param name="streamName"></param>
///// <returns></returns>
//public static ChartData ToChartData(DataVector stream, string streamName)
//{
// if (stream == null)
// throw new ArgumentNullException();
// if (stream.Count == 0)
// throw new ArgumentException("Stream must contain at least one element");
// var data = stream;
// var smoothedData = Numerics.SmoothBySavitzkyGolay(data, 11);
// // We know there is at least one element, so Get(0) is safe!
// return new ChartData(
// stream.Get(0).Unit,
// CreateDataItem(data, streamName, Colors.Gray, 1),
// CreateDataItem(smoothedData, streamName, Colors.Red, 1));
//}
///// <summary>
///// Loads a set of DataInfo elements into a ChartPrimitive, using the Value and Time.Ticks
///// properties as values for each element.
///// </summary>
///// <param name="source"></param>
///// <param name="name"></param>
///// <param name="color"></param>
///// <param name="lineWidth"></param>
///// <returns></returns>
//private static ChartPrimitive CreateDataItem(IEnumerable<DataInfo> source, String name, Color color, int lineWidth)
//{
// var cp = new ChartPrimitive
// {
// Color = color,
// Dashed = false,
// Filled = false,
// Label = name,
// LineThickness = lineWidth,
// ShowInLegend = false
// };
// foreach (DataInfo info in source)
// cp.AddPoint(info.Time.TotalMilliseconds, info.Value);
// return cp;
//}
public static void RenderTextToChartPosition(DrawingContext drawingContext, CanvasTransformInfo canvasInfo,
string text, Color textColor, Point chartPosition,
Point pixelOffset, bool flipY, bool centreAligned)
{
var typeFace = new Typeface("Arial");
// Render the marker label beneath or above the marker according
// to if the Y value is positive or negative
Point textPos = ToPixel(canvasInfo, chartPosition);
textPos.Offset(pixelOffset.X, pixelOffset.Y);
var formattedText = new FormattedText(
text,
CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
typeFace,
10,
new SolidColorBrush(textColor));
if (centreAligned)
{
formattedText.TextAlignment = TextAlignment.Center;
}
// Adjust position and transformation for inverted Y axis.
// Default behaviour is flipY == false, in case we need to
// flip the font rendering transform. The drawing canvas
// has inverted its Y-axis causing the text to render upside-down.
int transformY = flipY ? 1 : -1;
textPos.Y *= transformY;
// Push flip transformation
drawingContext.PushTransform(new ScaleTransform(1, transformY));
// Render text
drawingContext.DrawText(formattedText, textPos);
// Pop flip transformation
drawingContext.Pop();
}
///// <summary>
///// Convert a DataStream of values into a ChartData object which can be fed into the charts and displayed.
///// The default behaviour is to create a smoothed copy and add along with the original data.
///// The original data is colored Gray and the smoothed data Red by default.7
///// </summary>
///// <param name="stream"></param>
///// <param name="streamName"></param>
///// <returns></returns>
//public static ChartData ToChartData(DataVector stream, string streamName)
//{
// if (stream == null)
// throw new ArgumentNullException();
// if (stream.Count == 0)
// throw new ArgumentException("Stream must contain at least one element");
// var data = stream;
// var smoothedData = Numerics.SmoothBySavitzkyGolay(data, 11);
// // We know there is at least one element, so Get(0) is safe!
// return new ChartData(
// stream.Get(0).Unit,
// CreateDataItem(data, streamName, Colors.Gray, 1),
// CreateDataItem(smoothedData, streamName, Colors.Red, 1));
//}
///// <summary>
///// Loads a set of DataInfo elements into a ChartPrimitive, using the Value and Time.Ticks
///// properties as values for each element.
///// </summary>
///// <param name="source"></param>
///// <param name="name"></param>
///// <param name="color"></param>
///// <param name="lineWidth"></param>
///// <returns></returns>
//private static ChartPrimitive CreateDataItem(IEnumerable<DataInfo> source, String name, Color color, int lineWidth)
//{
// var cp = new ChartPrimitive
// {
// Color = color,
// Dashed = false,
// Filled = false,
// Label = name,
// LineThickness = lineWidth,
// ShowInLegend = false
// };
// foreach (DataInfo info in source)
// cp.AddPoint(info.Time.TotalMilliseconds, info.Value);
// return cp;
//}
public static void RenderTextToChartPosition(DrawingContext drawingContext, CanvasTransformInfo canvasInfo,
string text, Color textColor, Point chartPosition,
Point pixelOffset, bool flipY, bool centreAligned)
{
var typeFace = new Typeface("Arial");
// Render the marker label beneath or above the marker according
// to if the Y value is positive or negative
Point textPos = ToPixel(canvasInfo, chartPosition);
textPos.Offset(pixelOffset.X, pixelOffset.Y);
var formattedText = new FormattedText(
text,
CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
typeFace,
10,
new SolidColorBrush(textColor));
if (centreAligned)
formattedText.TextAlignment = TextAlignment.Center;
// Adjust position and transformation for inverted Y axis.
// Default behaviour is flipY == false, in case we need to
// flip the font rendering transform. The drawing canvas
// has inverted its Y-axis causing the text to render upside-down.
int transformY = flipY ? 1 : -1;
textPos.Y *= transformY;
// Push flip transformation
drawingContext.PushTransform(new ScaleTransform(1, transformY));
// Render text
drawingContext.DrawText(formattedText, textPos);
// Pop flip transformation
drawingContext.Pop();
}
/// <summary>
/// Translates a point from the chart dimension to the drawing canvas pixel dimension
/// </summary>
/// <param name="canvasInfo">Information about the canvas and its transformations</param>
/// <param name="valuePoint">A point in the chart with real plot values</param>
/// <returns>A point in the drawing canvas with pixel values</returns>
public static Point ToPixel(CanvasTransformInfo canvasInfo, Point valuePoint)
{
Canvas canvas = canvasInfo.Canvas;
Point scaledMaxPoint = canvasInfo.ScaledMaxPoint;
Point scaledMinPoint = canvasInfo.ScaledMinPoint;
double scaleX = 0.0;
double scaleY = 0.0;
var canvasSize = new Size(canvas.ActualWidth, canvas.ActualHeight);
if (scaledMaxPoint.X != scaledMinPoint.X)
scaleX = canvasSize.Width/(scaledMaxPoint.X - scaledMinPoint.X);
if (scaledMaxPoint.Y != scaledMinPoint.Y)
scaleY = canvasSize.Height/(scaledMaxPoint.Y - scaledMinPoint.Y);
double xPos = (valuePoint.X - scaledMinPoint.X)*scaleX;
double yPos = (valuePoint.Y - scaledMinPoint.Y)*scaleY;
return new Point(xPos, yPos);
}
// Keep this line for you BSD License obligations
#endregion Private Fields
#region Public Methods
/// <summary>
/// Constructor. Initializes all the class fields.
/// </summary>
public XYLineChart()
{
// This assumes that you are navigating to this scene.
// If you will normally instantiate it via code and display it
// manually, you either have to call InitializeComponent by hand or
// uncomment the following line.
InitializeComponent();
TextCanvasInfo = new CanvasTransformInfo();
primitiveList = new List<ChartPrimitive>();
markerList = new List<ChartMarkerSet>();
intervalList = new List<Interval>();
// Set the Chart Geometry Clip region
chartClip = new PathGeometry();
chartClip.AddGeometry(
new RectangleGeometry(new Rect(0, 0, clippedPlotCanvas.ActualWidth, clippedPlotCanvas.ActualHeight)));
shapeTransform = new MatrixTransform();
adornerMarkers = new AdornerChartMarkers(clippedPlotCanvas, shapeTransform, MarkerSets, this);
adorner = new AdornerCursorCoordinateDrawer(clippedPlotCanvas, shapeTransform);
optimalGridLineSpacing = new Point(100, 75);
panZoomCalculator =
new PanZoomCalculator(new Rect(0, 0, clippedPlotCanvas.ActualWidth, clippedPlotCanvas.ActualHeight));
panZoomCalculator.Window = new Rect(0, 0, clippedPlotCanvas.ActualWidth, clippedPlotCanvas.ActualHeight);
panZoomCalculator.PanZoomChanged += panZoomCalculator_PanZoomChanged;
closestPointPicker = new ClosestPointPicker(new Size(13, 13));
closestPointPicker.ClosestPointChanged += closestPointPicker_ClosestPointChanged;
Cursor = Cursors.None;
TextCanvasInfo.Canvas = textCanvas;
// UniformScaling = true;
// Set up all the message handlers for the clipped plot canvas
AttachEventsToCanvas(this);
//clippedPlotCanvas.Clip = chartClip;
clippedPlotCanvas.IsVisibleChanged += clippedPlotCanvas_IsVisibleChanged;
clippedPlotCanvas.SizeChanged += clippedPlotCanvas_SizeChanged;
}
