private void PositionLegends()
{
//reposition the legend and labels
C1.Win.C1Chart.ChartLabels labels = c1Chart1.ChartLabels;
if (labels == null || labels.LabelsCollection.Count < 5)
{
return;
}
c1Chart1.Update();
PlotArea plota = c1Chart1.ChartArea.PlotArea;
Legend leg = c1Chart1.Legend;
//get left alignment with the legend, and
//center about the plot area centerline
Point labP = leg.Location;
labP.Y = plota.Location.Y + plota.Size.Height / 2;
//get the height of the labels and legend
int labHeight = labels[0].Size.Height;
int h = labHeight * 5 + leg.Size.Height;
labP.Y -= h / 2;
for (int i = 0; i < 5; i++)
{
C1.Win.C1Chart.Label lab = labels[i];
lab.AttachMethodData.X = labP.X;
lab.AttachMethodData.Y = labP.Y;
labP.Y += labHeight;
}
leg.LocationDefault = new Point(-1, labP.Y);
}
private void Form1_Load(object sender, EventArgs e)
{
// Populate the Logarithmic Base combo box. Note that the base value
// is the base of the log used for both axes. It can be any double value
// greater than zero. "e" is interpreted as the "natural" algorithm.
string [] strItems = new string[] { "e", "2", "3", "5", "7.5", "10", "16" };
comboBoxLogBase.Items.AddRange(strItems);
comboBoxLogBase.SelectedIndex = comboBoxLogBase.FindStringExact("10");
// Populate the chart with some Power Series values as these
// readily show logarithmic behavior.
const int pointCount = 10;
int[] baseValues = new int[] { 2, 4, 5, 10 };
ChartDataSeriesCollection cdsc = c1Chart1.ChartGroups.Group0.ChartData.SeriesList;
cdsc.RemoveAll();
for (int bi = 0; bi < baseValues.Length; bi++)
{
int baseValue = baseValues[bi];
// create the Power Series data array
PointF[] points = new PointF[pointCount];
for (int i = 1; i < pointCount; i++)
{
points[i].X = i;
points[i].Y = (float)Math.Pow(baseValue, i);
}
// Create and add a new ChartDataSeries and copy in the data array.
ChartDataSeries cds = cdsc.AddNewSeries();
cds.PointData.CopyDataIn(points);
cds.Label = "y = Math.Pow(" + baseValue.ToString() + ",x)";
// Create a Chart Label to indicate the equation used to generate the data
// and attach it to the series appropriately.
C1.Win.C1Chart.ChartLabels clabs = c1Chart1.ChartLabels;
clabs.AutoArrangement.Method = AutoLabelArrangementMethodEnum.FindingOptimum;
C1.Win.C1Chart.Label lab = clabs.LabelsCollection.AddNewLabel();
lab.Text = cds.Label;
lab.AttachMethod = AttachMethodEnum.DataIndex;
lab.AttachMethodData.GroupIndex = 0;
lab.AttachMethodData.PointIndex = pointCount / 2 + bi;
lab.AttachMethodData.SeriesIndex = bi;
lab.Connected = true;
lab.Compass = LabelCompassEnum.Auto;
lab.Style.Border.BorderStyle = BorderStyleEnum.Solid;
lab.Visible = true;
}
// set the initial Logarithmic base values for the X and Y axes.
Area area = c1Chart1.ChartArea;
area.AxisX.LogarithmicBase = 10;
area.AxisX.Thickness = 1;
area.AxisY.LogarithmicBase = 10;
area.AxisY.Thickness = 1;
// call the check box handler to set axes values appropriate for
// log or non-log axes.
checkLOG_CheckedChanged(checkXLOG, null);
checkLOG_CheckedChanged(checkYLOG, null);
// Add some cosmetic attributes
Style style = c1Chart1.Style;
style.BackColor = Color.DarkRed;
style.BackColor2 = Color.OrangeRed;
style.GradientStyle = GradientStyleEnum.DiagonalCenter;
style.Border.Rounding.All = 20;
style = c1Chart1.ChartArea.Style;
style.BackColor = Color.White;
style.GradientStyle = GradientStyleEnum.None;
}
