public static DataPoint GetPointAtMouse(Chart c, MouseEventArgs e)
{
var result = c.HitTest(e.X, e.Y);
// If the mouse if over a data point
if (result.ChartElementType == ChartElementType.DataPoint)
{
// Find selected data point
var point = c.Series[0].Points[result.PointIndex];
return point;
}
return null;
}
/// <summary>
/// Mouse Down Event
/// </summary>
private void Chart1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
// Call Hit Test Method
HitTestResult result = Chart1.HitTest(e.X, e.Y);
if (result.ChartElementType != ChartElementType.DataPoint)
{
return;
}
// Remove data points
Chart1.Series[0].Points.Clear();
// If Pie chart is selected
if (Chart1.Series[0].ChartType == SeriesChartType.Pie)
{
// Set Chart Type
Chart1.Series[0].ChartType = SeriesChartType.Column;
// Add data points
Chart1.Series[0].Points.Add(5);
Chart1.Series[0].Points.Add(6);
Chart1.Series[0].Points.Add(7);
Chart1.Series[0].Points.Add(2);
// Set Axis labels
Chart1.Series[0].Points[0].AxisLabel = "N America";
Chart1.Series[0].Points[1].AxisLabel = "S America";
Chart1.Series[0].Points[2].AxisLabel = "Europe";
Chart1.Series[0].Points[3].AxisLabel = "Asia";
// Remove custom attributes
Chart1.Series[0].CustomProperties = "";
// Recalculate and repaint chart
Chart1.ChartAreas[0].RecalculateAxesScale();
Chart1.Invalidate();
return;
}
// Set Label style for pie chart
Chart1.Series[0].CustomProperties = "LabelStyle=outside";
// Remove gradient for data points
Chart1.Series[0].BackGradientStyle = GradientStyle.None;
switch (result.PointIndex)
{
// N America
case 0:
// Add data points
Chart1.Series[0].ChartType = SeriesChartType.Pie;
Chart1.Series[0].Points.Add(3);
Chart1.Series[0].Points.Add(2);
Chart1.Series[0].Points.Add(8);
// Set Axis labels
Chart1.Series[0].Points[0].AxisLabel = "Country 1";
Chart1.Series[0].Points[1].AxisLabel = "Country 2";
Chart1.Series[0].Points[2].AxisLabel = "Country 3";
break;
// S America
case 1:
// Add data points
Chart1.Series[0].ChartType = SeriesChartType.Pie;
Chart1.Series[0].Points.Add(4);
Chart1.Series[0].Points.Add(6);
Chart1.Series[0].Points.Add(2);
// Set Axis labels
Chart1.Series[0].Points[0].AxisLabel = "Country 4";
Chart1.Series[0].Points[1].AxisLabel = "Country 5";
Chart1.Series[0].Points[2].AxisLabel = "Country 6";
break;
// Europe
case 2:
// Add data points
Chart1.Series[0].ChartType = SeriesChartType.Pie;
Chart1.Series[0].Points.Add(5);
Chart1.Series[0].Points.Add(7);
Chart1.Series[0].Points.Add(2);
Chart1.Series[0].Points.Add(3);
// Set Axis labels
Chart1.Series[0].Points[0].AxisLabel = "Country 7";
Chart1.Series[0].Points[1].AxisLabel = "Country 8";
Chart1.Series[0].Points[2].AxisLabel = "Country 9";
Chart1.Series[0].Points[3].AxisLabel = "Country 10";
break;
// Asia
case 3:
// Add data points
Chart1.Series[0].ChartType = SeriesChartType.Pie;
Chart1.Series[0].Points.Add(4);
Chart1.Series[0].Points.Add(3);
Chart1.Series[0].Points.Add(6);
Chart1.Series[0].Points.Add(5);
Chart1.Series[0].Points.Add(4);
// Set Axis labels
Chart1.Series[0].Points[0].AxisLabel = "Country 11";
Chart1.Series[0].Points[1].AxisLabel = "Country 12";
Chart1.Series[0].Points[2].AxisLabel = "Country 13";
Chart1.Series[0].Points[3].AxisLabel = "Country 14";
Chart1.Series[0].Points[4].AxisLabel = "Country 15";
break;
}
Chart1.ChartAreas[0].RecalculateAxesScale();
Chart1.Invalidate();
}
private DateTime GetDateTimeFromPosition(Point pos, Chart chart)
{
var results = chart.HitTest(pos.X, pos.Y, false,
ChartElementType.PlottingArea);
foreach (var xVal in from result in results
where result.ChartElementType == ChartElementType.PlottingArea
select result.ChartArea.AxisX.PixelPositionToValue(pos.X))
{
return DateTime.FromOADate(xVal);
}
return DateTime.Now;
}
private Chart CreatChart()
{
var chart = new Chart();
chart.MouseClick += (o, e) =>
{
HitTestResult f = chart.HitTest(e.X, e.Y);
int p = f.PointIndex;
if (p > -1)
{
string check = chart.Series[_SerieName].Points[p].CustomProperties;
if (check != ("Exploded=True"))
{
chart.Series[_SerieName].Points[p].CustomProperties = "Exploded=True";
}
else
{
chart.Series[_SerieName].Points[p].CustomProperties = "Exploded=none";
}
}
};
var chartArea = new ChartArea();
var legend = new Legend();
chartArea.Area3DStyle.Enable3D = true;
chart.ChartAreas.Add(chartArea);
chart.Legends.Add(legend);
chart.Palette = ChartColorPalette.Pastel;
return chart;
}