/// <summary>
/// Transforms the specified point to relative 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>
/// <param name="isVector">True if the transform is a vector transform (i.e. only applies scale, not translation). The default value is False.</param>
/// <returns>The transformed point.</returns>
public virtual Point Transform(double x, double y, AxisBase yaxis, bool isVector = false)
{
if (yaxis == null)
{
throw new ArgumentNullException(nameof(yaxis), "Y axis should not be null when transforming.");
}
return(new Point(Transform(x, isVector), yaxis.Transform(y, isVector)));
}
/// <summary>
/// Renders the minor items.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="axisPosition">The axis position.</param>
protected virtual void RenderMinorItems(AxisBase axis, double axisPosition)
{
var eps = axis.ActualMinorStep * 1e-3;
var actualMinimum = axis.ActualMinimum;
var actualMaximum = axis.ActualMaximum;
var plotAreaLeft = Editor.CurveArea.Left;
var plotAreaRight = Editor.CurveArea.Right;
var plotAreaTop = Editor.CurveArea.Top;
var plotAreaBottom = Editor.CurveArea.Bottom;
var isHorizontal = axis.IsHorizontal();
double a0;
double a1;
var minorSegments = new List <Point>();
var minorTickSegments = new List <Point>();
GetTickPositions(axis, axis.TickStyle, axis.MinorTickSize, axis.Position, out a0, out a1);
foreach (var value in MinorTickValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
if (MajorTickValues.Contains(value))
{
continue;
}
var 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 (isHorizontal)
{
minorSegments.Add(new Point(transformedValue, plotAreaTop));
minorSegments.Add(new Point(transformedValue, plotAreaBottom));
}
else
{
minorSegments.Add(new Point(plotAreaLeft, transformedValue));
minorSegments.Add(new Point(plotAreaRight, transformedValue));
}
// Draw the minor tick
if (axis.TickStyle != TickStyle.None && axis.MinorTickSize > 0)
{
if (isHorizontal)
{
minorTickSegments.Add(new Point(transformedValue, axisPosition + a0));
minorTickSegments.Add(new Point(transformedValue, axisPosition + a1));
}
else
{
minorTickSegments.Add(new Point(axisPosition + a0, transformedValue));
minorTickSegments.Add(new Point(axisPosition + a1, transformedValue));
}
}
}
// Draw all the line segments
DrawingContext.DrawLineSegments(minorSegments, MinorColor);
DrawingContext.DrawLineSegments(minorTickSegments, MinorTickColor);
}
/// <summary>
/// Renders the major items.
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="axisPosition">The axis position.</param>
/// <param name="drawAxisLine">Draw the axis line if set to <c>true</c>.</param>
protected virtual void RenderMajorItems(AxisBase axis, double axisPosition, bool drawAxisLine)
{
var eps = axis.ActualMinorStep * 1e-3;
var actualMinimum = axis.ActualMinimum;
var actualMaximum = axis.ActualMaximum;
var plotAreaLeft = Editor.CurveArea.Left;
var plotAreaRight = Editor.CurveArea.Right;
var plotAreaTop = Editor.CurveArea.Top;
var plotAreaBottom = Editor.CurveArea.Bottom;
var isHorizontal = axis.IsHorizontal();
double a0;
double a1;
var majorSegments = new List <Point>();
var majorTickSegments = new List <Point>();
GetTickPositions(axis, axis.TickStyle, axis.MajorTickSize, axis.Position, out a0, out a1);
foreach (var value in MajorTickValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
var transformedValue = axis.Transform(value);
if (isHorizontal)
{
SnapTo(plotAreaLeft, ref transformedValue);
SnapTo(plotAreaRight, ref transformedValue);
}
else
{
SnapTo(plotAreaTop, ref transformedValue);
SnapTo(plotAreaBottom, ref transformedValue);
}
if (isHorizontal)
{
majorSegments.Add(new Point(transformedValue, plotAreaTop));
majorSegments.Add(new Point(transformedValue, plotAreaBottom));
}
else
{
majorSegments.Add(new Point(plotAreaLeft, transformedValue));
majorSegments.Add(new Point(plotAreaRight, transformedValue));
}
if (axis.TickStyle != TickStyle.None && axis.MajorTickSize > 0)
{
if (isHorizontal)
{
majorTickSegments.Add(new Point(transformedValue, axisPosition + a0));
majorTickSegments.Add(new Point(transformedValue, axisPosition + a1));
}
else
{
majorTickSegments.Add(new Point(axisPosition + a0, transformedValue));
majorTickSegments.Add(new Point(axisPosition + a1, transformedValue));
}
}
}
// Render the axis labels (numbers or category names)
var hAlign = HorizontalAlignment.Left;
var vAlign = VerticalAlignment.Top;
switch (axis.Position)
{
case AxisPosition.Left:
hAlign = HorizontalAlignment.Right;
vAlign = VerticalAlignment.Center;
break;
case AxisPosition.Right:
hAlign = HorizontalAlignment.Left;
vAlign = VerticalAlignment.Center;
break;
case AxisPosition.Top:
hAlign = HorizontalAlignment.Center;
vAlign = VerticalAlignment.Bottom;
break;
case AxisPosition.Bottom:
hAlign = HorizontalAlignment.Center;
vAlign = VerticalAlignment.Top;
break;
case AxisPosition.None:
break;
default:
throw new ArgumentOutOfRangeException();
}
var texts = new List <string>();
var textPositions = new List <Point>();
foreach (var value in MajorLabelValues)
{
if (value < actualMinimum - eps || value > actualMaximum + eps)
{
continue;
}
var transformedValue = axis.Transform(value);
if (isHorizontal)
{
SnapTo(plotAreaLeft, ref transformedValue);
SnapTo(plotAreaRight, ref transformedValue);
}
else
{
SnapTo(plotAreaTop, ref transformedValue);
SnapTo(plotAreaBottom, ref transformedValue);
}
var point = new Point();
switch (axis.Position)
{
case AxisPosition.Left:
point = new Point(axisPosition + a1 - axis.AxisTickToLabelDistance, transformedValue);
break;
case AxisPosition.Right:
point = new Point(axisPosition + a1 + axis.AxisTickToLabelDistance, transformedValue);
break;
case AxisPosition.Top:
point = new Point(transformedValue, axisPosition + a1 - axis.AxisTickToLabelDistance);
break;
case AxisPosition.Bottom:
point = new Point(transformedValue, axisPosition + a1 + axis.AxisTickToLabelDistance);
break;
case AxisPosition.None:
break;
default:
throw new ArgumentOutOfRangeException();
}
var text = axis.FormatValue(value);
texts.Add(text);
textPositions.Add(point);
}
// Batch all the texts together
DrawingContext.DrawTexts(textPositions, TextColor, texts, axis.FontFamily, axis.FontSize, axis.FontWeight, hAlign, vAlign);
if (drawAxisLine)
{
// Draw the axis line (across the tick marks)
if (isHorizontal)
{
DrawingContext.DrawLine(new Point(axis.Transform(actualMinimum), axisPosition), new Point(axis.Transform(actualMaximum), axisPosition), AxislineColor);
}
else
{
DrawingContext.DrawLine(new Point(axisPosition, axis.Transform(actualMinimum)), new Point(axisPosition, axis.Transform(actualMaximum)), AxislineColor);
}
}
DrawingContext.DrawLineSegments(majorSegments, MajorColor, 2);
DrawingContext.DrawLineSegments(majorTickSegments, MajorTickColor, 2);
}