/// <summary>
/// Increase axis margins by amount necessary to ensure both that there is room
/// for labels and that the necessary axes are aligned.
/// </summary>
/// <param name="alignedAxes">List of axes that need to be aligned.</param>
private static void ExpandAxisMargins(List <Axis2D> alignedAxes, double plotLength)
{
// Calculate margins
Thickness1D margin = new Thickness1D(alignedAxes.Max(axis => axis.AxisPadding.Lower), alignedAxes.Max(axis => axis.AxisPadding.Upper));
double minPlotLength = 1.0;
if (plotLength > minPlotLength)
{
double newTotalLength = plotLength + margin.Total();
foreach (Axis2D axis in alignedAxes)
{
axis.AxisTotalLength = newTotalLength;
}
}
else if ((alignedAxes[0].AxisTotalLength - margin.Total()) < minPlotLength)
{
foreach (Axis2D axis in alignedAxes)
{
axis.AxisTotalLength = margin.Total() + minPlotLength;
}
}
// Set the margin and update Scale and Offset.
foreach (Axis2D axis in alignedAxes)
{
axis.ResetAxisMargin(margin);
}
int tickIndex = 0;
int maxTickIndex = alignedAxes.Max(axis => axis.Ticks.Length) / 2;
int[] tickPair = new int[2];
Axis2D limitingLowerAxis = null;
int limitingLowerTickIndex = 0;
double limitingLowerSemiWidth = margin.Lower;
Axis2D limitingUpperAxis = null;
int limitingUpperTickIndex = 0;
double limitingUpperSemiWidth = margin.Upper;
double offsetLower = 0;
double deltaLower = alignedAxes[0].MaxTransformed - alignedAxes[0].MinTransformed;
double deltaUpper = deltaLower;
double axisTotalLength = alignedAxes[0].AxisTotalLength;
double offsetUpper = 0;
int nRescales = 0; // for diagnosic purposes only
while ((tickIndex <= maxTickIndex) && (nRescales < 10))
{
bool reset = false;
// if a rescaling is required, start again from the beginning.
for (int i = 0; i < alignedAxes.Count; ++i)
{
Axis2D currentAxis = alignedAxes[i];
tickPair[0] = tickIndex;
tickPair[1] = currentAxis.TicksTransformed.Length - 1 - tickIndex;
if ((currentAxis.TicksTransformed.Length - 1 - tickIndex) < tickIndex)
{
continue;
}
for (int j = 0; j <= 1; ++j)
{
int index = tickPair[j];
if (!currentAxis.LabelsVisible || currentAxis.TickLabelCache[index].Label.Text == "" || !currentAxis.TickLabelCache[index].IsShown)
{
continue;
}
if ((currentAxis.Scale * currentAxis.TicksTransformed[index] - currentAxis.Offset - currentAxis.LimitingTickLabelSizeForLength(index) / 2) < -0.1)
{
// need to rescale axes
limitingLowerAxis = currentAxis;
limitingLowerTickIndex = index;
limitingLowerSemiWidth = currentAxis.LimitingTickLabelSizeForLength(index) / 2;
offsetLower = currentAxis.TicksTransformed[index] - currentAxis.MinTransformed;
deltaLower = currentAxis.MaxTransformed - currentAxis.MinTransformed;
}
else if ((currentAxis.Scale * currentAxis.TicksTransformed[index] - currentAxis.Offset + currentAxis.LimitingTickLabelSizeForLength(index) / 2) > (currentAxis.AxisTotalLength + 0.1))
{
// need to rescale axes
limitingUpperAxis = currentAxis;
limitingUpperTickIndex = index;
limitingUpperSemiWidth = currentAxis.LimitingTickLabelSizeForLength(index) / 2;
offsetUpper = currentAxis.MaxTransformed - currentAxis.TicksTransformed[index];
deltaUpper = currentAxis.MaxTransformed - currentAxis.MinTransformed;
}
else
{
continue;
}
// Reset required:
reset = true; nRescales++;
double offsetUpperPrime = offsetUpper * deltaLower / deltaUpper;
// scale for lower-limiting axis
double newScale = (axisTotalLength - limitingLowerSemiWidth - limitingUpperSemiWidth) /
(deltaLower - offsetLower - offsetUpperPrime);
if (plotLength > minPlotLength)
{
// Axis is fixed to plotLength.
newScale = plotLength / deltaLower;
margin = new Thickness1D(limitingLowerSemiWidth - offsetLower * newScale, limitingUpperSemiWidth - offsetUpperPrime * newScale);
foreach (Axis2D axis in alignedAxes)
{
axis.AxisTotalLength = plotLength + margin.Total();
}
}
if (newScale * deltaLower <= minPlotLength)
{
// Axis is fixed to minPlotLength
newScale = minPlotLength / deltaLower;
margin = new Thickness1D(limitingLowerSemiWidth - offsetLower * newScale, limitingUpperSemiWidth - offsetUpperPrime * newScale);
foreach (Axis2D axis in alignedAxes)
{
axis.AxisTotalLength = minPlotLength + margin.Total();
}
}
// otherwise, axis is unfixed.
margin = new Thickness1D(limitingLowerSemiWidth - offsetLower * newScale, limitingUpperSemiWidth - offsetUpperPrime * newScale);
foreach (Axis2D axis in alignedAxes)
{
axis.RescaleAxis(newScale * deltaLower / (axis.MaxTransformed - axis.MinTransformed), margin);
}
break;
}
if (reset == true)
{
break;
}
}
if (reset == true)
{
tickIndex = 0;
}
else
{
tickIndex++;
}
}
if (nRescales == 10)
{
Console.WriteLine("Many rescales...");
}
}
