/// <summary>
/// Computes minimal plot rectangle, which contains all plot rectangles of child elements
/// </summary>
/// <returns>Minimal plot rectangle, which contains all plot rectangles of child elements</returns>
protected override DataRect ComputeBounds()
{
if (!IsVisible)
{
return(new DataRect(new Range(), new Range()));
}
var localPlotRect = DataRect.Empty;
foreach (UIElement child in Children)
{
DependencyObject item = child;
if (item is ContentPresenter && VisualTreeHelper.GetChildrenCount(item) == 1)
{
item = VisualTreeHelper.GetChild(item, 0);
}
double v;
v = GetX1(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.XSurround(XDataTransform.DataToPlot(v));
}
v = GetX2(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.XSurround(XDataTransform.DataToPlot(v));
}
v = GetY1(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.YSurround(YDataTransform.DataToPlot(v));
}
v = GetY2(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.YSurround(YDataTransform.DataToPlot(v));
}
var points = GetPoints(item);
if (points != null)
{
foreach (var point in points)
{
localPlotRect.XSurround(XDataTransform.DataToPlot(point.X));
localPlotRect.YSurround(YDataTransform.DataToPlot(point.Y));
}
}
}
return(localPlotRect);
}
/// <summary>
/// Computes minimal plot rectangle, which contains all plot rectangles of child elements
/// </summary>
/// <returns>Minimal plot rectangle, which contains all plot rectangles of child elements</returns>
protected override DataRect ComputeBounds()
{
var localPlotRect = DataRect.Empty;
foreach (UIElement child in Children)
{
DependencyObject item = child;
if (item is ContentPresenter && VisualTreeHelper.GetChildrenCount(item) == 1)
{
item = VisualTreeHelper.GetChild(item, 0);
}
double v;
v = GetX1(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.XSurround(XDataTransform.DataToPlot(v));
}
v = GetX2(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.XSurround(XDataTransform.DataToPlot(v));
}
v = GetY1(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.YSurround(YDataTransform.DataToPlot(v));
}
v = GetY2(item);
if (!double.IsNaN(v) && !double.IsInfinity(v))
{
localPlotRect.YSurround(YDataTransform.DataToPlot(v));
}
IEnumerable <Point> points
= this.AutoFitAffectOrigins
? GetPoints(item)
: GetPoints(item)?.SkipWhile(p => p.X < this.PlotOriginX);
if (points != null)
{
foreach (var point in points)
{
localPlotRect.XSurround(XDataTransform.DataToPlot(point.X));
localPlotRect.YSurround(YDataTransform.DataToPlot(point.Y));
}
}
}
return(localPlotRect);
}
/// <summary>
/// Finds the point nearest to a specified point on a screen.
/// </summary>
/// <param name="screenPoint">The point to search nearest for.</param>
/// <param name="nearest">The out parameter to handle the founded point.</param>
/// <param name="vd">The out parameter to handle data of founded point.</param>
/// <returns>Boolen value indicating whether the nearest point was found or not.</returns>
public bool GetNearestPointAndValue(Point screenPoint, out Point nearest, out double vd)
{
nearest = new Point(Double.NaN, Double.NaN);
vd = Double.NaN;
if (data == null || xArr == null || yArr == null)
{
return(false);
}
Point dataPoint = new Point(XDataTransform.PlotToData(XFromLeft(screenPoint.X)), YDataTransform.PlotToData(YFromTop(screenPoint.Y)));//PlotContext.ScreenToData(screenPoint);
int i = ArrayExtensions.GetNearestIndex(xArr, dataPoint.X);
if (i < 0)
{
return(false);
}
int j = ArrayExtensions.GetNearestIndex(yArr, dataPoint.Y);
if (j < 0)
{
return(false);
}
if (IsBitmap)
{
if (i > 0 && xArr[i - 1] > dataPoint.X)
{
i--;
}
if (j > 0 && yArr[j - 1] > dataPoint.Y)
{
j--;
}
}
if (i < data.GetLength(0) && j < data.GetLength(1))
{
vd = data[i, j];
nearest = new Point(xArr[i], yArr[j]);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Finds the point nearest to a specified point on a screen.
/// </summary>
/// <param name="screenPoint">The point to search nearest for.</param>
/// <param name="nearest">The out parameter to handle the founded point.</param>
/// <param name="vd">The out parameter to handle data of founded point.</param>
/// <returns>Boolen value indicating whether the nearest point was found or not.</returns>
public bool GetNearestPointAndValue(Point screenPoint, out Point nearest, out double vd)
{
nearest = new Point(Double.NaN, Double.NaN);
vd = Double.NaN;
if (DataContainer == null || XArray == null || YArray == null)
{
return(false);
}
Point dataPoint = new Point(XDataTransform.PlotToData(XFromLeft(screenPoint.X)), YDataTransform.PlotToData(YFromTop(screenPoint.Y)));
int i = ArrayExtensions.GetNearestIndex(XArray, dataPoint.X);
if (i < 0)
{
return(false);
}
int j = ArrayExtensions.GetNearestIndex(YArray, dataPoint.Y);
if (j < 0)
{
return(false);
}
if (IsBitmap)
{
if (i > 0 && XArray[i - 1] > dataPoint.X)
{
i--;
}
if (j > 0 && YArray[j - 1] > dataPoint.Y)
{
j--;
}
}
if (i < DataContainer.GetLength(0) && j < DataContainer.GetLength(1))
{
vd = DataContainer[i, j];
nearest = new Point(XArray[i], YArray[j]);
return(true);
}
else
{
return(false);
}
}
internal void ArrangeChildren(Size finalSize)
{
foreach (UIElement child in Children)
{
DependencyObject item = child;
if (item is ContentPresenter && VisualTreeHelper.GetChildrenCount(item) == 1)
{
item = VisualTreeHelper.GetChild(item, 0);
}
if (item is Line || item is Polyline)
{
child.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
}
else
{
double x1 = GetX1(item);
double x2 = GetX2(item);
double y1 = GetY1(item);
double y2 = GetY2(item);
Size desiredSize = Size.Empty;
if (double.IsNaN(x1) || double.IsNaN(x2) || double.IsNaN(y1) || double.IsNaN(y2))
{
desiredSize = child.DesiredSize;
}
double L = 0.0;
if (!double.IsNaN(x1))
{
if (double.IsNegativeInfinity(x1))
{
L = 0;
}
else if (double.IsPositiveInfinity(x1))
{
L = finalSize.Width;
}
else
{
L = LeftFromX(XDataTransform.DataToPlot(x1)); // x1 is not Nan and Inf here
}
}
else
{
L = (double)item.GetValue(Canvas.LeftProperty);
}
double W = 0.0;
var elem = item as FrameworkElement;
if (!double.IsNaN(x1) && !double.IsNaN(x2))
{
double L2 = 0.0;
if (double.IsNegativeInfinity(x2))
{
L2 = 0;
}
else if (double.IsPositiveInfinity(x2))
{
L2 = desiredSize.Width;
}
else
{
L2 = LeftFromX(XDataTransform.DataToPlot(x2)); // x2 is not Nan and Inf here
}
if (L2 >= L)
{
W = L2 - L;
}
else
{
W = L - L2;
L = L2;
}
}
else if (elem != null || double.IsNaN(W = elem.Width) || double.IsInfinity(W))
{
W = desiredSize.Width;
}
double T = 0.0;
if (!double.IsNaN(y1))
{
if (double.IsNegativeInfinity(y1))
{
T = desiredSize.Height;
}
else if (double.IsPositiveInfinity(y1))
{
T = 0;
}
else
{
T = TopFromY(YDataTransform.DataToPlot(y1)); // y1 is not Nan and Inf here
}
}
else
{
T = (double)item.GetValue(Canvas.TopProperty);
}
double H = 0.0;
if (!double.IsNaN(y1) && !double.IsNaN(y2))
{
double T2 = 0.0;
if (double.IsNegativeInfinity(y2))
{
T2 = desiredSize.Height;
}
else if (double.IsPositiveInfinity(y2))
{
T2 = desiredSize.Width;
}
else
{
T2 = TopFromY(YDataTransform.DataToPlot(y2)); // y2 is not Nan and Inf here
}
if (T2 >= T)
{
H = T2 - T;
}
else
{
H = T - T2;
T = T2;
}
}
else if (elem != null || double.IsNaN(H = elem.Height) || double.IsInfinity(H))
{
H = desiredSize.Height;
}
if (Double.IsNaN(L) || Double.IsInfinity(L) || Double.IsNaN(W) || Double.IsInfinity(W)) // Horizontal data to screen transform fails
{
L = 0;
W = desiredSize.Width;
}
if (Double.IsNaN(T) || Double.IsInfinity(T) || Double.IsNaN(H) || Double.IsInfinity(H)) // Vertical data to screen transform fails
{
T = 0;
H = desiredSize.Height;
}
child.Arrange(new Rect(L, T, W, H));
}
}
}
internal void MeasureChildren(Size availableSize)
{
foreach (UIElement child in Children)
{
DependencyObject item = child;
if (item is ContentPresenter && VisualTreeHelper.GetChildrenCount(item) == 1)
{
item = VisualTreeHelper.GetChild(item, 0);
}
var xy = GetPoints(item);
if (xy != null)
{
if (item is Polyline)
{
var line = (Polyline)item;
var points = new PointCollection();
foreach (var point in xy)
{
points.Add(new Point(LeftFromX(XDataTransform.DataToPlot(point.X)), TopFromY(YDataTransform.DataToPlot(point.Y))));
}
line.Points = points;
}
else if (item is Polygon)
{
var p = (Polygon)item;
var points = new PointCollection();
foreach (var point in xy)
{
points.Add(new Point(LeftFromX(XDataTransform.DataToPlot(point.X)), TopFromY(YDataTransform.DataToPlot(point.Y))));
}
p.Points = points;
}
}
if (item is Line)
{
var line = (Line)item;
double v;
v = GetX1(line);
if (!double.IsNaN(v))
{
if (Double.IsNegativeInfinity(v))
{
line.X1 = 0;
}
else if (Double.IsPositiveInfinity(v))
{
line.X1 = availableSize.Width;
}
else
{
line.X1 = LeftFromX(XDataTransform.DataToPlot(v));
}
}
v = GetX2(line);
if (!double.IsNaN(v))
{
if (Double.IsNegativeInfinity(v))
{
line.X2 = 0;
}
else if (Double.IsPositiveInfinity(v))
{
line.X2 = availableSize.Width;
}
else
{
line.X2 = LeftFromX(XDataTransform.DataToPlot(v));
}
}
v = GetY1(line);
if (!double.IsNaN(v))
{
if (Double.IsNegativeInfinity(v))
{
line.Y1 = availableSize.Height;
}
else if (Double.IsPositiveInfinity(v))
{
line.Y1 = 0;
}
else
{
line.Y1 = TopFromY(YDataTransform.DataToPlot(v));
}
}
v = GetY2(line);
if (!double.IsNaN(v))
{
if (Double.IsNegativeInfinity(v))
{
line.Y2 = availableSize.Height;
}
else if (Double.IsPositiveInfinity(v))
{
line.Y2 = 0;
}
else
{
line.Y2 = TopFromY(YDataTransform.DataToPlot(v));
}
}
}
child.Measure(availableSize);
}
}
private double GetHorizontalCoordinateFromTick(double tick, double screenSize, Range range)
{
return(ValueToScreen(XDataTransform.DataToPlot(tick), screenSize, range, IsXAxisReversed));
}