/// <summary>
/// Renders the specified axis.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="pass">The pass.</param>
public override void Render(Axis axis, int pass)
{
base.Render(axis, pass);
double totalShift = axis.AxisDistance + axis.PositionTierMinShift;
double tierSize = axis.PositionTierSize - this.Plot.AxisTierDistance;
// store properties locally for performance
double plotAreaLeft = this.Plot.PlotArea.Left;
double plotAreaRight = this.Plot.PlotArea.Right;
double plotAreaTop = this.Plot.PlotArea.Top;
double plotAreaBottom = this.Plot.PlotArea.Bottom;
// Axis position (x or y screen coordinate)
double axisPosition = 0;
double titlePosition = 0;
switch (axis.Position)
{
case AxisPosition.Left:
axisPosition = plotAreaLeft - totalShift;
titlePosition = axisPosition - tierSize;
break;
case AxisPosition.Right:
axisPosition = plotAreaRight + totalShift;
titlePosition = axisPosition + tierSize;
break;
case AxisPosition.Top:
axisPosition = plotAreaTop - totalShift;
titlePosition = axisPosition - tierSize;
break;
case AxisPosition.Bottom:
axisPosition = plotAreaBottom + totalShift;
titlePosition = axisPosition + tierSize;
break;
}
if (axis.PositionAtZeroCrossing)
{
var perpendicularAxis = axis.IsHorizontal() ? this.Plot.DefaultYAxis : this.Plot.DefaultXAxis;
axisPosition = perpendicularAxis.Transform(0);
}
if (pass == 0)
{
this.RenderMinorItems(axis, axisPosition);
}
if (pass == 1)
{
this.RenderMajorItems(axis, axisPosition, titlePosition);
this.RenderAxisTitle(axis, titlePosition);
}
}
/// <summary>
/// Gets the maximum scale of the specified axis.
/// </summary>
public double AxisMaximum(Models.Graph.Axis.AxisType axisType)
{
OxyPlot.Axes.Axis axis = GetAxis(axisType);
if (axis != null)
{
return(axis.ActualMaximum);
}
else
{
return(double.NaN);
}
}
/// <summary>
/// Gets the interval (major step) of the specified axis.
/// </summary>
public double AxisMajorStep(Models.Graph.Axis.AxisType axisType)
{
OxyPlot.Axes.Axis axis = GetAxis(axisType);
if (axis != null)
{
return(axis.IntervalLength);
}
else
{
return(double.NaN);
}
}
/// <summary>
/// Gets the minimum scale of the specified axis.
/// </summary>
public double AxisMinimum(Models.Graph.Axis.AxisType axisType)
{
plot1.Refresh();
OxyPlot.Axes.Axis axis = GetAxis(axisType);
if (axis != null)
{
return(axis.ActualMinimum);
}
else
{
return(double.NaN);
}
}
/// <summary>
/// Gets the minimum scale of the specified axis.
/// </summary>
public double AxisMinimum(Models.Graph.Axis.AxisType axisType)
{
/// TBI foreach (PlotView p in plots)
/// TBI p.Refresh();
OxyPlot.Axes.Axis axis = GetAxis(axisType);
if (axis != null)
{
return(axis.ActualMinimum);
}
else
{
return(double.NaN);
}
}
/// <summary>
/// Format axis tick labels so that there is a leading zero on the tick
/// labels when necessary.
/// </summary>
/// <param name="axis">The axis to format</param>
private void FormatAxisTickLabels(OxyPlot.Axes.Axis axis)
{
// axis.IntervalLength = 100;
if (axis is DateTimeAxis)
{
DateTimeAxis dateAxis = axis as DateTimeAxis;
int numDays = (largestDate - smallestDate).Days;
if (numDays < 100)
{
dateAxis.IntervalType = DateTimeIntervalType.Days;
}
else if (numDays <= 366)
{
dateAxis.IntervalType = DateTimeIntervalType.Months;
dateAxis.StringFormat = "dd-MMM";
}
else if (numDays <= 720)
{
dateAxis.IntervalType = DateTimeIntervalType.Months;
dateAxis.StringFormat = "MMM-yyyy";
}
else
{
dateAxis.IntervalType = DateTimeIntervalType.Years;
dateAxis.StringFormat = "yyyy";
}
}
if (axis is LinearAxis &&
(axis.ActualStringFormat == null || !axis.ActualStringFormat.Contains("yyyy")))
{
// We want the axis labels to always have a leading 0 when displaying decimal places.
// e.g. we want 0.5 rather than .5
// Use the current culture to format the string.
string st = axis.ActualMajorStep.ToString(System.Globalization.CultureInfo.InvariantCulture);
// count the number of decimal places in the above string.
int pos = st.IndexOfAny(".,".ToCharArray());
if (pos != -1)
{
int numDecimalPlaces = st.Length - pos - 1;
axis.StringFormat = "F" + numDecimalPlaces.ToString();
}
}
}
/// <summary>
/// Gets the minimum scale of the specified axis.
/// </summary>
public double AxisMinimum(Models.Graph.Axis.AxisType axisType)
{
foreach (PlotView p in plots)
{
p.InvalidatePlot(true);
}
OxyPlot.Axes.Axis axis = GetAxis(axisType);
if (axis != null)
{
return(axis.ActualMinimum);
}
else
{
return(double.NaN);
}
}
/// <summary>
/// Inverse transform the specified screen point.
/// </summary>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="yaxis">The y-axis.</param>
/// <returns>The data point.</returns>
public override DataPoint InverseTransform(double x, double y, Axis yaxis)
{
var angleAxis = yaxis as AngleAxis;
if (angleAxis == null)
{
throw new InvalidOperationException("Polar angle axis not defined!");
}
x -= this.MidPoint.x;
y -= this.MidPoint.y;
y *= -1;
double th = Math.Atan2(y, x);
double r = Math.Sqrt((x * x) + (y * y));
x = (r / this.Scale) + this.Offset;
y = (th / angleAxis.Scale) + angleAxis.Offset;
return new DataPoint(x, y);
}
/// <summary>
/// Renders the specified axis.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="pass">The pass.</param>
/// <exception cref="System.NullReferenceException">Angle axis should not be <c>null</c>.</exception>
public override void Render(Axis axis, int pass)
{
base.Render(axis, pass);
var angleAxis = this.Plot.DefaultAngleAxis;
if (angleAxis == null)
{
throw new NullReferenceException("Angle axis should not be null.");
}
angleAxis.UpdateActualMaxMin();
var majorTicks = MajorTickValues.Where(x => x > axis.ActualMinimum && x <= axis.ActualMaximum).ToArray();
if (pass == 0 && this.MinorPen != null)
{
var minorTicks = MinorTickValues.Where(x => x >= axis.ActualMinimum && x <= axis.ActualMaximum && !majorTicks.Contains(x)).ToArray();
foreach (var tickValue in minorTicks)
{
this.RenderTick(axis, angleAxis, tickValue, this.MinorPen);
}
}
if (pass == 0 && this.MajorPen != null)
{
foreach (var tickValue in majorTicks)
{
this.RenderTick(axis, angleAxis, tickValue, this.MajorPen);
}
}
if (pass == 1)
{
foreach (double tickValue in majorTicks)
{
this.RenderTickText(axis, tickValue, angleAxis);
}
}
}
/// <summary>
/// Format the specified axis.
/// </summary>
/// <param name="axisType">The axis type to format</param>
/// <param name="title">The axis title. If null then a default axis title will be shown</param>
/// <param name="inverted">Invert the axis?</param>
/// <param name="minimum">Minimum axis scale</param>
/// <param name="maximum">Maximum axis scale</param>
/// <param name="interval">Axis scale interval</param>
public void FormatAxis(
Models.Graph.Axis.AxisType axisType,
string title,
bool inverted,
double minimum,
double maximum,
double interval)
{
OxyPlot.Axes.Axis oxyAxis = this.GetAxis(axisType);
if (oxyAxis != null)
{
oxyAxis.Title = title;
oxyAxis.MinorTickSize = 0;
oxyAxis.AxislineStyle = LineStyle.Solid;
oxyAxis.AxisTitleDistance = 10;
if (inverted)
{
oxyAxis.StartPosition = 1;
oxyAxis.EndPosition = 0;
}
else
{
oxyAxis.StartPosition = 0;
oxyAxis.EndPosition = 1;
}
if (!double.IsNaN(minimum))
{
oxyAxis.Minimum = minimum;
}
if (!double.IsNaN(maximum))
{
oxyAxis.Maximum = maximum;
}
if (!double.IsNaN(interval) && interval > 0)
{
oxyAxis.MajorStep = interval;
}
}
}
/// <summary>
/// Determines whether the specified point is valid.
/// </summary>
/// <param name="pt">
/// The point.
/// </param>
/// <param name="xaxis">
/// The x axis.
/// </param>
/// <param name="yaxis">
/// The y axis.
/// </param>
/// <returns>
/// <c>true</c> if the point is valid; otherwise, <c>false</c> .
/// </returns>
public virtual bool IsValidPoint(ScatterPoint pt, Axis xaxis, Axis yaxis)
{
return !double.IsNaN(pt.X) && !double.IsInfinity(pt.X) && !double.IsNaN(pt.Y) && !double.IsInfinity(pt.Y)
&& (xaxis != null && xaxis.IsValidValue(pt.X)) && (yaxis != null && yaxis.IsValidValue(pt.Y));
}
/// <summary>
/// Gets the axis title position, rotation and alignment.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="titlePosition">The title position.</param>
/// <param name="angle">The angle.</param>
/// <param name="halign">The horizontal alignment.</param>
/// <param name="valign">The vertical alignment.</param>
/// <returns>The <see cref="ScreenPoint" />.</returns>
protected virtual ScreenPoint GetAxisTitlePositionAndAlignment(
Axis axis,
double titlePosition,
ref double angle,
ref HorizontalAlignment halign,
ref VerticalAlignment valign)
{
double middle = axis.IsHorizontal()
? Lerp(axis.ScreenMin.X, axis.ScreenMax.X, axis.TitlePosition)
: Lerp(axis.ScreenMax.Y, axis.ScreenMin.Y, axis.TitlePosition);
if (axis.PositionAtZeroCrossing)
{
middle = Lerp(axis.Transform(axis.ActualMaximum), axis.Transform(axis.ActualMinimum), axis.TitlePosition);
}
switch (axis.Position)
{
case AxisPosition.Left:
return new ScreenPoint(titlePosition, middle);
case AxisPosition.Right:
valign = VerticalAlignment.Bottom;
return new ScreenPoint(titlePosition, middle);
case AxisPosition.Top:
halign = HorizontalAlignment.Center;
valign = VerticalAlignment.Top;
angle = 0;
return new ScreenPoint(middle, titlePosition);
case AxisPosition.Bottom:
halign = HorizontalAlignment.Center;
valign = VerticalAlignment.Bottom;
angle = 0;
return new ScreenPoint(middle, titlePosition);
default:
throw new ArgumentOutOfRangeException("axis");
}
}
/// <summary>
/// Convert the given apsim axis to an oxyplot <see cref="Axis"/>.
/// </summary>
/// <param name="graph">The graph to be converted.</param>
public static Axis ToOxyPlotAxis(this APSIM.Shared.Graphing.Axis axis, AxisRequirements requirements, IEnumerable <string> labels)
{
if (requirements.AxisKind == null)
{
throw new InvalidOperationException("Unable to create series - axis requirements unknown, possibly because no series have any data");
}
Axis result = CreateAxis((AxisType)requirements.AxisKind);
result.Position = axis.Position.ToOxyAxisPosition();
result.Title = axis.Title;
result.PositionAtZeroCrossing = axis.CrossesAtZero;
if (axis.Minimum is double min)
{
if (double.IsNaN(min))
{
Debug.WriteLine("Axis minimum is NaN");
}
else
{
result.Minimum = min;
}
}
if (axis.Maximum is double max)
{
if (double.IsNaN(max))
{
Debug.WriteLine("Axis maximum is NaN");
}
else
{
result.Maximum = max;
}
}
if (axis.Interval is double interval)
{
if (double.IsNaN(interval))
{
Debug.WriteLine("Axis interval is NaN");
}
else
{
if (requirements.AxisKind == AxisType.DateTime)
{
Debug.WriteLine("WARNING: Axis interval is set manually on a date axis - need to double check the implementation.");
}
result.MajorStep = interval;
}
}
if (axis.Inverted)
{
result.StartPosition = 1;
result.EndPosition = 0;
}
// There are many other options which could be exposed to the user.
result.MinorTickSize = 0;
result.AxisTitleDistance = 10;
result.AxislineStyle = OxyPlot.LineStyle.Solid;
if (requirements.AxisKind == AxisType.Category && result is CategoryAxis categoryAxis)
{
categoryAxis.LabelField = "Label";
categoryAxis.Labels.AddRange(labels);
}
return(result);
}
/// <summary>
/// Transforms the specified point to screen coordinates.
/// </summary>
/// <param name="p">
/// The point.
/// </param>
/// <param name="xaxis">
/// The x axis.
/// </param>
/// <param name="yaxis">
/// The y axis.
/// </param>
/// <returns>
/// The transformed point.
/// </returns>
public static ScreenPoint Transform(IDataPoint p, Axis xaxis, Axis yaxis)
{
return xaxis.Transform(p.X, p.Y, yaxis);
}
/// <summary>
/// Transforms the specified point to screen coordinates.
/// </summary>
/// <param name="x">The x value (for the current axis).</param>
/// <param name="y">The y value.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns>The transformed point.</returns>
public override ScreenPoint Transform(double x, double y, Axis yaxis)
{
var angleAxis = yaxis as AngleAxis;
if (angleAxis == null)
{
throw new InvalidOperationException("Polar angle axis not defined!");
}
var r = (x - this.Offset) * this.Scale;
var theta = (y - angleAxis.Offset) * angleAxis.Scale;
return new ScreenPoint(this.MidPoint.x + (r * Math.Cos(theta / 180 * Math.PI)), this.MidPoint.y - (r * Math.Sin(theta / 180 * Math.PI)));
}
/// <summary>
/// Renders a tick by drawing an lot of segments
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="angleAxis">The angle axis.</param>
/// <param name="x">The x-value.</param>
/// <param name="pen">The pen.</param>
private void RenderTickArc(Axis axis, AngleAxis angleAxis, double x, OxyPen pen)
{
// caution: make sure angleAxis.UpdateActualMaxMin(); has been called
var minAngle = angleAxis.ActualMinimum;
var maxAngle = angleAxis.ActualMaximum;
// number of segment to draw a full circle
// - decrease if you want get more speed
// - increase if you want more detail
// (making a public property of it would be a great idea)
const double MaxSegments = 90.0;
// compute the actual number of segments
var segmentCount = (int)(MaxSegments * Math.Abs(angleAxis.EndAngle - angleAxis.StartAngle) / 360.0);
var angleStep = (maxAngle - minAngle) / (segmentCount - 1);
var points = new List<ScreenPoint>();
for (var i = 0; i < segmentCount; i++)
{
var angle = minAngle + (i * angleStep);
points.Add(axis.Transform(x, angle, angleAxis));
}
this.RenderContext.DrawLine(points, pen.Color, pen.Thickness, pen.ActualDashArray);
}
/// <summary>
/// Transforms the specified point to screen coordinates.
/// </summary>
/// <param name="x">The x value (for the current axis).</param>
/// <param name="y">The y value.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns>The transformed point.</returns>
public virtual ScreenPoint Transform(double x, double y, Axis yaxis)
{
if (yaxis == null)
{
throw new NullReferenceException("Y axis should not be null when transforming.");
}
return new ScreenPoint(this.Transform(x), yaxis.Transform(y));
}
/// <summary>
/// Renders the specified axis.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="pass">The pass.</param>
public override void Render(Axis axis, int pass)
{
base.Render(axis, pass);
bool drawAxisLine = true;
double totalShift = axis.AxisDistance + axis.PositionTierMinShift;
double tierSize = axis.PositionTierSize - this.Plot.AxisTierDistance;
// store properties locally for performance
double plotAreaLeft = this.Plot.PlotArea.Left;
double plotAreaRight = this.Plot.PlotArea.Right;
double plotAreaTop = this.Plot.PlotArea.Top;
double plotAreaBottom = this.Plot.PlotArea.Bottom;
// Axis position (x or y screen coordinate)
double axisPosition = 0;
double titlePosition = 0;
switch (axis.Position)
{
case AxisPosition.Left:
axisPosition = plotAreaLeft - totalShift;
break;
case AxisPosition.Right:
axisPosition = plotAreaRight + totalShift;
break;
case AxisPosition.Top:
axisPosition = plotAreaTop - totalShift;
break;
case AxisPosition.Bottom:
axisPosition = plotAreaBottom + totalShift;
break;
}
if (axis.PositionAtZeroCrossing)
{
var perpendicularAxis = axis.IsHorizontal() ? this.Plot.DefaultYAxis : this.Plot.DefaultXAxis;
// the axis should be positioned at the origin of the perpendicular axis
axisPosition = perpendicularAxis.Transform(0);
var p0 = perpendicularAxis.Transform(perpendicularAxis.ActualMinimum);
var p1 = perpendicularAxis.Transform(perpendicularAxis.ActualMaximum);
// find the min/max positions
var min = Math.Min(p0, p1);
var max = Math.Max(p0, p1);
// also consider the plot area
var areaMin = axis.IsHorizontal() ? plotAreaTop : plotAreaLeft;
var areaMax = axis.IsHorizontal() ? plotAreaBottom : plotAreaRight;
min = Math.Max(min, areaMin);
max = Math.Min(max, areaMax);
if (axisPosition < min)
{
axisPosition = min;
var borderThickness = axis.IsHorizontal()
? this.Plot.PlotAreaBorderThickness.Top
: this.Plot.PlotAreaBorderThickness.Left;
if (borderThickness > 0 && this.Plot.PlotAreaBorderColor.IsVisible())
{
// there is already a line here...
drawAxisLine = false;
}
}
if (axisPosition > max)
{
axisPosition = max;
var borderThickness = axis.IsHorizontal()
? this.Plot.PlotAreaBorderThickness.Bottom
: this.Plot.PlotAreaBorderThickness.Right;
if (borderThickness > 0 && this.Plot.PlotAreaBorderColor.IsVisible())
{
// there is already a line here...
drawAxisLine = false;
}
}
}
switch (axis.Position)
{
case AxisPosition.Left:
titlePosition = axisPosition - tierSize;
break;
case AxisPosition.Right:
titlePosition = axisPosition + tierSize;
break;
case AxisPosition.Top:
titlePosition = axisPosition - tierSize;
break;
case AxisPosition.Bottom:
titlePosition = axisPosition + tierSize;
break;
}
if (pass == 0)
{
this.RenderMinorItems(axis, axisPosition);
}
if (pass == 1)
{
this.RenderMajorItems(axis, axisPosition, titlePosition, drawAxisLine);
this.RenderAxisTitle(axis, titlePosition);
}
}
/// <summary>
/// Transforms the specified point from screen space to data space.
/// </summary>
/// <param name="p">The point.</param>
/// <param name="xaxis">The x axis.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns>The data point.</returns>
public static DataPoint InverseTransform(ScreenPoint p, Axis xaxis, Axis yaxis)
{
return xaxis.InverseTransform(p.x, p.y, yaxis);
}
/// <summary>
/// Inverse transform the specified screen point.
/// </summary>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="yaxis">The y-axis.</param>
/// <returns>The data point.</returns>
public virtual DataPoint InverseTransform(double x, double y, Axis yaxis)
{
return new DataPoint(this.InverseTransform(x), yaxis != null ? yaxis.InverseTransform(y) : 0);
}
/// <summary>
/// Returns the angle (in radian) of the axis line in screen coordinate
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="angleAxis">The angle axis.</param>
/// <returns>The angle (in radians).</returns>
private static double GetActualAngle(Axis axis, Axis angleAxis)
{
var a = axis.Transform(0, angleAxis.Angle, angleAxis);
var b = axis.Transform(1, angleAxis.Angle, angleAxis);
return Math.Atan2(b.y - a.y, b.x - a.x);
}
/// <summary>
/// Renders a tick, chooses the best implementation
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="angleAxis">The angle axis.</param>
/// <param name="x">The x-value.</param>
/// <param name="pen">The pen.</param>
private void RenderTick(Axis axis, AngleAxis angleAxis, double x, OxyPen pen)
{
var isFullCircle = Math.Abs(Math.Abs(angleAxis.EndAngle - angleAxis.StartAngle) - 360) < 1e-6;
if (isFullCircle && pen.ActualDashArray == null)
{
this.RenderTickCircle(axis, angleAxis, x, pen);
}
else
{
this.RenderTickArc(axis, angleAxis, x, pen);
}
}
/// <summary>
/// Renders major tick text
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="x">The x-value.</param>
/// <param name="angleAxis">The angle axis.</param>
private void RenderTickText(Axis axis, double x, Axis angleAxis)
{
var actualAngle = GetActualAngle(axis, angleAxis);
var dx = axis.AxisTickToLabelDistance * Math.Sin(actualAngle);
var dy = -axis.AxisTickToLabelDistance * Math.Cos(actualAngle);
HorizontalAlignment ha;
VerticalAlignment va;
GetTickTextAligment(actualAngle, out ha, out va);
var pt = axis.Transform(x, angleAxis.Angle, angleAxis);
pt = new ScreenPoint(pt.X + dx, pt.Y + dy);
string text = axis.FormatValue(x);
this.RenderContext.DrawMathText(
pt,
text,
axis.ActualTextColor,
axis.ActualFont,
axis.ActualFontSize,
axis.ActualFontWeight,
axis.Angle,
ha,
va);
}
/// <summary>
/// Renders the axis title.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="titlePosition">The title position.</param>
protected virtual void RenderAxisTitle(Axis axis, double titlePosition)
{
if (string.IsNullOrEmpty(axis.ActualTitle))
{
return;
}
bool isHorizontal = axis.IsHorizontal();
OxySize? maxSize = null;
if (axis.ClipTitle)
{
// Calculate the title clipping dimensions
double screenLength = isHorizontal
? Math.Abs(axis.ScreenMax.X - axis.ScreenMin.X)
: Math.Abs(axis.ScreenMax.Y - axis.ScreenMin.Y);
maxSize = new OxySize(screenLength * axis.TitleClippingLength, double.MaxValue);
}
double angle = -90;
var halign = HorizontalAlignment.Center;
var valign = VerticalAlignment.Top;
var lpt = this.GetAxisTitlePositionAndAlignment(axis, titlePosition, ref angle, ref halign, ref valign);
this.RenderContext.DrawMathText(
lpt,
axis.ActualTitle,
axis.ActualTitleColor,
axis.ActualTitleFont,
axis.ActualTitleFontSize,
axis.ActualTitleFontWeight,
angle,
halign,
valign,
maxSize);
}
/// <summary>
/// Checks if the specified value is valid.
/// </summary>
/// <param name="v">The value.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns>True if the value is valid.</returns>
public virtual bool IsValidPoint(double v, Axis yaxis)
{
return !double.IsNaN(v) && !double.IsInfinity(v);
}
/// <summary>
/// Renders the major items.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="axisPosition">The axis position.</param>
/// <param name="titlePosition">The title position.</param>
/// <param name="drawAxisLine">Draw the axis line if set to <c>true</c>.</param>
protected virtual void RenderMajorItems(Axis axis, double axisPosition, double titlePosition, bool drawAxisLine)
{
double eps = axis.ActualMinorStep * 1e-3;
double actualMinimum = axis.ActualMinimum;
double actualMaximum = axis.ActualMaximum;
double plotAreaLeft = this.Plot.PlotArea.Left;
double plotAreaRight = this.Plot.PlotArea.Right;
double plotAreaTop = this.Plot.PlotArea.Top;
double plotAreaBottom = this.Plot.PlotArea.Bottom;
bool isHorizontal = axis.IsHorizontal();
double a0;
double a1;
var majorSegments = new List<ScreenPoint>();
var majorTickSegments = new List<ScreenPoint>();
this.GetTickPositions(axis, axis.TickStyle, axis.MajorTickSize, axis.Position, out a0, out a1);
foreach (double value in this.MajorTickValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
if (axis.PositionAtZeroCrossing && Math.Abs(value) < eps)
{
continue;
}
double transformedValue = axis.Transform(value);
if (isHorizontal)
{
SnapTo(plotAreaLeft, ref transformedValue);
SnapTo(plotAreaRight, ref transformedValue);
}
else
{
SnapTo(plotAreaTop, ref transformedValue);
SnapTo(plotAreaBottom, ref transformedValue);
}
if (this.MajorPen != null)
{
if (isHorizontal)
{
majorSegments.Add(new ScreenPoint(transformedValue, plotAreaTop));
majorSegments.Add(new ScreenPoint(transformedValue, plotAreaBottom));
}
else
{
majorSegments.Add(new ScreenPoint(plotAreaLeft, transformedValue));
majorSegments.Add(new ScreenPoint(plotAreaRight, transformedValue));
}
}
if (axis.TickStyle != TickStyle.None && axis.MajorTickSize > 0)
{
if (isHorizontal)
{
majorTickSegments.Add(new ScreenPoint(transformedValue, axisPosition + a0));
majorTickSegments.Add(new ScreenPoint(transformedValue, axisPosition + a1));
}
else
{
majorTickSegments.Add(new ScreenPoint(axisPosition + a0, transformedValue));
majorTickSegments.Add(new ScreenPoint(axisPosition + a1, transformedValue));
}
}
}
// Render the axis labels (numbers or category names)
foreach (double value in this.MajorLabelValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
if (axis.PositionAtZeroCrossing && Math.Abs(value) < eps)
{
continue;
}
double transformedValue = axis.Transform(value);
if (isHorizontal)
{
SnapTo(plotAreaLeft, ref transformedValue);
SnapTo(plotAreaRight, ref transformedValue);
}
else
{
SnapTo(plotAreaTop, ref transformedValue);
SnapTo(plotAreaBottom, ref transformedValue);
}
var pt = new ScreenPoint();
var ha = HorizontalAlignment.Right;
var va = VerticalAlignment.Middle;
switch (axis.Position)
{
case AxisPosition.Left:
pt = new ScreenPoint(axisPosition + a1 - axis.AxisTickToLabelDistance, transformedValue);
this.GetRotatedAlignments(
axis.Angle,
HorizontalAlignment.Right,
VerticalAlignment.Middle,
out ha,
out va);
break;
case AxisPosition.Right:
pt = new ScreenPoint(axisPosition + a1 + axis.AxisTickToLabelDistance, transformedValue);
this.GetRotatedAlignments(
axis.Angle,
HorizontalAlignment.Left,
VerticalAlignment.Middle,
out ha,
out va);
break;
case AxisPosition.Top:
pt = new ScreenPoint(transformedValue, axisPosition + a1 - axis.AxisTickToLabelDistance);
this.GetRotatedAlignments(
axis.Angle,
HorizontalAlignment.Center,
VerticalAlignment.Bottom,
out ha,
out va);
break;
case AxisPosition.Bottom:
pt = new ScreenPoint(transformedValue, axisPosition + a1 + axis.AxisTickToLabelDistance);
this.GetRotatedAlignments(
axis.Angle,
HorizontalAlignment.Center,
VerticalAlignment.Top,
out ha,
out va);
break;
}
string text = axis.FormatValue(value);
this.RenderContext.DrawMathText(
pt,
text,
axis.ActualTextColor,
axis.ActualFont,
axis.ActualFontSize,
axis.ActualFontWeight,
axis.Angle,
ha,
va);
}
// Draw the zero crossing line
if (axis.PositionAtZeroCrossing && this.ZeroPen != null && this.IsWithin(0, actualMinimum, actualMaximum))
{
double t0 = axis.Transform(0);
if (isHorizontal)
{
this.RenderContext.DrawLine(t0, plotAreaTop, t0, plotAreaBottom, this.ZeroPen);
}
else
{
this.RenderContext.DrawLine(plotAreaLeft, t0, plotAreaRight, t0, this.ZeroPen);
}
}
// Draw extra grid lines
if (axis.ExtraGridlines != null && this.ExtraPen != null)
{
foreach (double value in axis.ExtraGridlines)
{
if (!this.IsWithin(value, actualMinimum, actualMaximum))
{
continue;
}
double transformedValue = axis.Transform(value);
if (isHorizontal)
{
this.RenderContext.DrawLine(
transformedValue,
plotAreaTop,
transformedValue,
plotAreaBottom,
this.ExtraPen);
}
else
{
this.RenderContext.DrawLine(
plotAreaLeft,
transformedValue,
plotAreaRight,
transformedValue,
this.ExtraPen);
}
}
}
if (drawAxisLine)
{
// Draw the axis line (across the tick marks)
if (isHorizontal)
{
this.RenderContext.DrawLine(
axis.Transform(actualMinimum),
axisPosition,
axis.Transform(actualMaximum),
axisPosition,
this.AxislinePen);
}
else
{
this.RenderContext.DrawLine(
axisPosition,
axis.Transform(actualMinimum),
axisPosition,
axis.Transform(actualMaximum),
this.AxislinePen);
}
}
if (this.MajorPen != null)
{
this.RenderContext.DrawLineSegments(majorSegments, this.MajorPen);
}
if (this.MajorTickPen != null)
{
this.RenderContext.DrawLineSegments(majorTickSegments, this.MajorTickPen);
}
}
/// <summary>
/// Determines whether the point is valid.
/// </summary>
/// <param name="pt">The point.</param>
/// <param name="xaxis">The x axis.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns><c>true</c> if [is valid point] [the specified pt]; otherwise, <c>false</c>.</returns>
public virtual bool IsValidItem(HighLowItem pt, Axis xaxis, Axis yaxis)
{
return !double.IsNaN(pt.X) && !double.IsInfinity(pt.X) && !double.IsNaN(pt.High)
&& !double.IsInfinity(pt.High) && !double.IsNaN(pt.Low) && !double.IsInfinity(pt.Low);
}
/// <summary>
/// Renders the minor items.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="axisPosition">The axis position.</param>
protected virtual void RenderMinorItems(Axis axis, double axisPosition)
{
double eps = axis.ActualMinorStep * 1e-3;
double actualMinimum = axis.ActualMinimum;
double actualMaximum = axis.ActualMaximum;
double plotAreaLeft = this.Plot.PlotArea.Left;
double plotAreaRight = this.Plot.PlotArea.Right;
double plotAreaTop = this.Plot.PlotArea.Top;
double plotAreaBottom = this.Plot.PlotArea.Bottom;
bool isHorizontal = axis.IsHorizontal();
double a0;
double a1;
var minorSegments = new List<ScreenPoint>();
var minorTickSegments = new List<ScreenPoint>();
this.GetTickPositions(axis, axis.TickStyle, axis.MinorTickSize, axis.Position, out a0, out a1);
foreach (double value in this.MinorTickValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
if (this.MajorTickValues.Contains(value))
{
continue;
}
if (axis.PositionAtZeroCrossing && Math.Abs(value) < eps)
{
continue;
}
double transformedValue = axis.Transform(value);
if (isHorizontal)
{
SnapTo(plotAreaLeft, ref transformedValue);
SnapTo(plotAreaRight, ref transformedValue);
}
else
{
SnapTo(plotAreaTop, ref transformedValue);
SnapTo(plotAreaBottom, ref transformedValue);
}
// Draw the minor grid line
if (this.MinorPen != null)
{
if (isHorizontal)
{
minorSegments.Add(new ScreenPoint(transformedValue, plotAreaTop));
minorSegments.Add(new ScreenPoint(transformedValue, plotAreaBottom));
}
else
{
if (transformedValue < plotAreaTop || transformedValue > plotAreaBottom)
{
}
minorSegments.Add(new ScreenPoint(plotAreaLeft, transformedValue));
minorSegments.Add(new ScreenPoint(plotAreaRight, transformedValue));
}
}
// Draw the minor tick
if (axis.TickStyle != TickStyle.None && axis.MinorTickSize > 0)
{
if (isHorizontal)
{
minorTickSegments.Add(new ScreenPoint(transformedValue, axisPosition + a0));
minorTickSegments.Add(new ScreenPoint(transformedValue, axisPosition + a1));
}
else
{
minorTickSegments.Add(new ScreenPoint(axisPosition + a0, transformedValue));
minorTickSegments.Add(new ScreenPoint(axisPosition + a1, transformedValue));
}
}
}
// Draw all the line segments);
if (this.MinorPen != null)
{
this.RenderContext.DrawLineSegments(minorSegments, this.MinorPen);
}
if (this.MinorTickPen != null)
{
this.RenderContext.DrawLineSegments(minorTickSegments, this.MinorTickPen);
}
}
/// <summary>
/// Inverse transforms the specified screen point.
/// </summary>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="yaxis">The y-axis.</param>
/// <returns>The data point.</returns>
/// <exception cref="System.InvalidOperationException">Angle axis should always be the y-axis.</exception>
public override DataPoint InverseTransform(double x, double y, Axis yaxis)
{
throw new InvalidOperationException("Angle axis should always be the y-axis.");
}
/// <summary>
/// Check if the data series is using the specified axis.
/// </summary>
/// <param name="axis">An axis.</param>
/// <returns>True if the axis is in use.</returns>
protected internal override bool IsUsing(Axis axis)
{
return false;
}
/// <summary>
/// Renders a tick by drawing an ellipse
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="angleAxis">The angle axis.</param>
/// <param name="x">The x-value.</param>
/// <param name="pen">The pen.</param>
private void RenderTickCircle(Axis axis, Axis angleAxis, double x, OxyPen pen)
{
var zero = angleAxis.Offset;
var center = axis.Transform(axis.ActualMinimum, zero, angleAxis);
var right = axis.Transform(x, zero, angleAxis).X;
var radius = right - center.X;
var width = radius * 2;
var left = right - width;
var top = center.Y - radius;
var height = width;
this.RenderContext.DrawEllipse(new OxyRect(left, top, width, height), OxyColors.Undefined, pen.Color, pen.Thickness);
}
private Axis ConvertAxis(ChartAxisViewModel axis)
{
Axis newAxis = null;
switch (axis.AxisType)
{
case (ChartAxisType.CategoryX):
{
newAxis = new CategoryAxis
{
LabelField = axis.ValueMemberPath,
ItemsSource = axis.DataSource.Data
};
break;
}
case (ChartAxisType.NumericX):
case (ChartAxisType.NumericY):
{
newAxis = new LinearAxis
{
};
break;
}
case (ChartAxisType.CategoryDateTimeX):
{
var dtaxis = new DateTimeAxis
{
IntervalType = DateTimeIntervalType.Auto,
};
var scale = axis.GetScaleForProperty(axis.ValueMemberPath);
if (null != scale)
{
scale.PropertyChanged += (s, a) =>
{
if (a.PropertyName != "Minimum" && a.PropertyName != "Maximum")
{
return;
}
var min = new DateTime((long)scale.Minimum);
var max = new DateTime((long)scale.Maximum);
var laxis = _plotModel.Axes.FirstOrDefault(x => x.Title == scale.Name) as DateTimeAxis;
if (null == laxis)
{
return;
}
var delta = max - min;
var lmax = 0.0d;
var lmin = 0.0d;
if (TimeSpan.FromSeconds(1) > delta)
{
laxis.IntervalType = DateTimeIntervalType.Seconds;
}
else if (TimeSpan.FromMinutes(1) > delta)
{
laxis.IntervalType = DateTimeIntervalType.Minutes;
}
else if (TimeSpan.FromHours(1) > delta)
{
laxis.IntervalType = DateTimeIntervalType.Hours;
}
else if (TimeSpan.FromDays(1) > delta)
{
laxis.IntervalType = DateTimeIntervalType.Days;
}
else if (TimeSpan.FromDays(30) > delta)
{
laxis.IntervalType = DateTimeIntervalType.Months;
}
else
{
laxis.IntervalType = DateTimeIntervalType.Auto;
}
//TODO: remove
laxis.IntervalType = DateTimeIntervalType.Seconds;
//laxis.Minimum = scale.Minimum;
//laxis.Maximum = scale.Maximum;
OnPlotModelChanged();
};
}
newAxis = dtaxis;
break;
}
}
if (null == newAxis)
{
return(null);
}
switch (axis.AxisLocation)
{
case (AxisLocation.InsideBottom):
case (AxisLocation.OutsideBottom):
{
newAxis.Position = AxisPosition.Bottom;
break;
}
case (AxisLocation.InsideTop):
case (AxisLocation.OutsideTop):
{
newAxis.Position = AxisPosition.Top;
break;
}
case (AxisLocation.InsideLeft):
case (AxisLocation.OutsideLeft):
{
newAxis.Position = AxisPosition.Left;
break;
}
case (AxisLocation.InsideRight):
case (AxisLocation.OutsideRight):
{
newAxis.Position = AxisPosition.Right;
break;
}
default:
{
newAxis.Position = AxisPosition.None;
break;
}
}
newAxis.Title = axis.Name;
var series = axis.AxisScaleDescriptors.FirstOrDefault();
if (null != series)
{
newAxis.Title = series.Scale.Name;
}
newAxis.Key = newAxis.Title;
return(newAxis);
}
/// <summary>
/// Resets the specified axis.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
public void Reset(Axis axis)
{
axis.Reset();
}
/// <summary>
/// Zooms the specified axis to the specified values.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
/// <param name="p1">
/// The new minimum value.
/// </param>
/// <param name="p2">
/// The new maximum value.
/// </param>
public void Zoom(Axis axis, double p1, double p2)
{
axis.Zoom(p1, p2);
this.RefreshPlot(false);
}
/// <summary>
/// Zooms at the specified position.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
/// <param name="factor">
/// The zoom factor.
/// </param>
/// <param name="x">
/// The position to zoom at.
/// </param>
public void ZoomAt(Axis axis, double factor, double x = double.NaN)
{
if (double.IsNaN(x))
{
double sx = (axis.Transform(axis.ActualMaximum) + axis.Transform(axis.ActualMinimum)) * 0.5;
x = axis.InverseTransform(sx);
}
axis.ZoomAt(factor, x);
}
/// <summary>
/// Gets the axes from a point.
/// </summary>
/// <param name="pt">
/// The point.
/// </param>
/// <param name="xaxis">
/// The x-axis.
/// </param>
/// <param name="yaxis">
/// The y-axis.
/// </param>
public void GetAxesFromPoint(ScreenPoint pt, out Axis xaxis, out Axis yaxis)
{
if (this.ActualModel != null)
{
this.ActualModel.GetAxesFromPoint(pt, out xaxis, out yaxis);
}
else
{
xaxis = null;
yaxis = null;
}
}
/// <summary>
/// Determines whether the specified item contains a valid point.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="xaxis">The x axis.</param>
/// <param name="yaxis">The y axis.</param>
/// <returns><c>true</c> if the point is valid; otherwise, <c>false</c> .</returns>
public virtual bool IsValidPoint(BoxPlotItem item, Axis xaxis, Axis yaxis)
{
return !double.IsNaN(item.X) && !double.IsInfinity(item.X) && !item.Values.Any(double.IsNaN)
&& !item.Values.Any(double.IsInfinity) && (xaxis != null && xaxis.IsValidValue(item.X))
&& (yaxis != null && item.Values.All(yaxis.IsValidValue));
}
/// <summary>
/// Check if the data series is using the specified axis.
/// </summary>
/// <param name="axis">An axis which should be checked if used</param>
/// <returns>True if the axis is in use.</returns>
protected internal override bool IsUsing(Axis axis)
{
return this.XAxis == axis || this.YAxis == axis;
}
/// <summary>
/// Pans the specified axis.
/// </summary>
/// <param name="axis">
/// The axis.
/// </param>
/// <param name="ppt">
/// The previous point (screen coordinates).
/// </param>
/// <param name="cpt">
/// The current point (screen coordinates).
/// </param>
public void Pan(Axis axis, ScreenPoint ppt, ScreenPoint cpt)
{
axis.Pan(ppt, cpt);
this.InvalidatePlot(false);
}
