/// <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>
/// 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>
/// 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>
/// 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>
/// 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>
/// 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");
}
}