void FiveSetVennLabels(NVennSeries venn)
{
const int nCount = 5;
string[] s1 = new string[] { "A", "B", "C", "D", "E" };
string[] s2 = new string[] { "AC", "BD", "CE", "DA", "EB" };
string[] s3 = new string[] { "ABCD", "BCDE", "CDEA", "DEAB", "EABC" };
venn.ClearLabels();
venn.LabelsTextStyle.FontStyle = new NFontStyle("Verdana", 8);
// add the center label
venn.AddLabel("ABCDE", new NPointF(0, 0));
// add layer 1 labels, angle is in radians
NPointF[] points = CalculateLabelPositions(nCount, 35, -1.1f);
for (int i = 0; i < nCount; i++)
{
venn.AddLabel(s1[i], points[i]);
}
// add layer 2 labels, angle is in radians
points = CalculateLabelPositions(nCount, 25, -1.3f);
for (int i = 0; i < nCount; i++)
{
venn.AddLabel(s2[i], points[i]);
}
// add layer 4 labels, angle is in radians
points = CalculateLabelPositions(nCount, 17.5f, -0.5f);
for (int i = 0; i < nCount; i++)
{
venn.AddLabel(s3[i], points[i]);
}
}
void ThreeSetVennLabels(NVennSeries venn)
{
string[] s1 = new string[] { "A", "B", "C" };
string[] s2 = new string[] { "BC", "AC", "AB" };
venn.ClearLabels();
venn.LabelsTextStyle.FontStyle = new NFontStyle("Verdana", 8);
// add the center label
venn.AddLabel("ABC", new NPointF(0, 0));
// add outer labels
NPointF[] points = CalculateLabelPositions(3, 30, (float)(-Math.PI / 2));
for (int i = 0; i < 3; i++)
{
venn.AddLabel(s1[i], points[i]);
}
// add middle labels
points = CalculateLabelPositions(3, 17, (float)Math.PI / 2);
for (int i = 0; i < 3; i++)
{
venn.AddLabel(s2[i], points[i]);
}
}
void TwoSetVennLabels(NVennSeries venn)
{
string[] s1 = new string[] { "A", "AB", "B" };
venn.ClearLabels();
venn.LabelsTextStyle.FontStyle = new NFontStyle("Verdana", 8);
// add labels
venn.AddLabel(s1[0], new NPointF(-25, 0));
venn.AddLabel(s1[1], new NPointF(0, 0));
venn.AddLabel(s1[2], new NPointF(25, 0));
}
void FourSetVennLabels(NVennSeries venn)
{
string centreLabel = "ABCD";
string[] s1 = new string[] { "A", "B", "C", "D" };
string[] s2 = new string[] { "AC", "CD", "BD", "AD", "AB", "BC" };
string[] s3 = new string[] { "ACD", "BCD", "ABD", "ABC" };
venn.ClearLabels();
venn.LabelsTextStyle.FontStyle = new NFontStyle("Verdana", 8);
// add centre label
venn.AddLabel(centreLabel, new NPointF(0, -8));
// add layer 1 labels
venn.AddLabel(s1[0], new NPointF(-12.5f - 15f, -10f + 10f));
venn.AddLabel(s1[1], new NPointF(12.5f + 15f, -10f + 10f));
venn.AddLabel(s1[2], new NPointF(-2.5f - 15f, 5f + 16f));
venn.AddLabel(s1[3], new NPointF(2.5f + 15f, 5f + 16f));
// add layer 2 labels
venn.AddLabel(s2[0], new NPointF(-12.5f - 9f, -10f + 19f));
venn.AddLabel(s2[1], new NPointF(0, -10f + 24f));
venn.AddLabel(s2[2], new NPointF(12.5f + 9f, -10f + 19f));
venn.AddLabel(s2[3], new NPointF(2.5f - 18f, 5f - 18f));
venn.AddLabel(s2[4], new NPointF(0, -10f - 16f));
venn.AddLabel(s2[5], new NPointF(-2.5f + 18f, 5f - 18f));
// add layer 3 labels
venn.AddLabel(s3[0], new NPointF(-12.5f + 1f, -10f + 10f));
venn.AddLabel(s3[1], new NPointF(12.5f - 1f, -10f + 10f));
venn.AddLabel(s3[2], new NPointF(2.5f - 10f, 5f - 21.5f));
venn.AddLabel(s3[3], new NPointF(-2.5f + 10f, 5f - 21.5f));
}