private void verify(double[] labels)
{
LegendY legend = (LegendY)TestLegendYScroller.Legend;
if (labels.Length != legend.LabelValues.Length)
{
System.Diagnostics.Debugger.Break();
throw new Exception("There should be " + labels.Length + " legends, but there were " + legend.LabelValues.Length + ".");
}
for (int legendValueIndex = 0; legendValueIndex < labels.Length; legendValueIndex++)
{
if (labels[legendValueIndex] != Math.Round(legend.LabelValues[legendValueIndex], 3))
{
System.Diagnostics.Debugger.Break();
throw new Exception("Legend[" + legendValueIndex + "] should be '" + labels[legendValueIndex] +
"' but was '" + Math.Round(legend.LabelValues[legendValueIndex], 3) + "'");
}
}
}
// -------
/// <summary>
/// Renders the horizontal x-grid-line to the drawingContext, one line for each label in YLegend.
/// </summary>
protected override void OnCreateVisual(DrawingContext drawingContext, double width, double height, DrawingVisual _)
{
LegendY legendy = (LegendY)LegendScrollerY.Legend;
//grid-lines use only 1 dimension. Both for x and y grid-line,
double minDisplayValue = MinDisplayValues[0];
// Create a GuidelineSet to get the lines exactly on a pixel
GuidelineSet guidelines = new GuidelineSet();
double halfPenWidth = StrokePen.Thickness / 2;
foreach (double lableValue in legendy.LabelValues !)
{
double yPos = height - (ScaleY * (lableValue - minDisplayValue));
guidelines.GuidelinesY.Add(yPos + halfPenWidth);
}
drawingContext.PushGuidelineSet(guidelines);
foreach (double lableValue in legendy.LabelValues)
{
double yPos = height - (ScaleY * (lableValue - minDisplayValue));
drawingContext.DrawLine(StrokePen, new Point(0, yPos), new Point(width, yPos));
}
drawingContext.Pop();
}
/// <summary>
/// Constructor using any x-axis legend
/// </summary>
public LegendScrollerY(LegendY legend) : base(legend)
{
}
/// <summary>
/// Dummy constructor allowing public constructor to call TraceCreateStart() before construtor gets executed
/// </summary>
private LegendScrollerYTraced(DummyTraceClass dummyArgument, LegendY legendY) : base(legendY)
{
}