private void OnCustomDrawSeriesPoint(object sender, CustomDrawSeriesPointEventArgs e)
{
// Design a series marker image.
Bitmap image = new Bitmap(totalWidth, totalHeight);
bool isSelected = trackedPointArgument != null && e.SeriesPoint.Argument.Equals(trackedPointArgument);
using (Graphics graphics = Graphics.FromImage(image)) {
using (var fillBrush = isSelected ? (Brush) new HatchBrush(HatchStyle.DarkDownwardDiagonal,
e.LegendDrawOptions.Color,
e.LegendDrawOptions.ActualColor2)
: (Brush) new SolidBrush(e.LegendDrawOptions.Color)) {
graphics.FillRectangle(fillBrush, totalRect);
}
Image photo;
if (photoCache.TryGetValue(e.SeriesPoint.Argument, out photo))
{
graphics.DrawImage(photo, photoRect);
}
}
e.LegendMarkerImage = image;
e.DisposeLegendMarkerImage = true;
PieDrawOptions options = e.SeriesDrawOptions as PieDrawOptions;
if (isSelected && options != null)
{
options.FillStyle.FillMode = DevExpress.XtraCharts.FillMode.Hatch;
((HatchFillOptions)options.FillStyle.Options).HatchStyle = HatchStyle.DarkDownwardDiagonal;
}
}
/// <summary>
/// 设置饼状图的Series以及Legend颜色
/// </summary>
/// <param name="chart">ChartControl</param>
/// <param name="setColorHander">委托；参数顺序【DrawOptions，LegendDrawOptions，SeriesPoint】</param>
public static void SetPieSeriesColor(this ChartControl chart, Action <PieDrawOptions, PieDrawOptions, SeriesPoint> setColorHander)
{
//eg:
//chartControl1.SetPieSeriesColor((drawOptions, legendDrawOptions, seriesPoint) =>
//{
// if (seriesPoint.Argument == "A")
// {
// drawOptions.Color = Color.Red;
// legendDrawOptions.Color = Color.Red;
// }
// if (seriesPoint.Argument == "B")
// {
// drawOptions.Color = Color.Yellow;
// legendDrawOptions.Color = Color.Yellow;
// }
// if (seriesPoint.Argument == "C")
// {
// drawOptions.Color = Color.Gray;
// legendDrawOptions.Color = Color.Gray;
// }
// if (seriesPoint.Argument == "D")
// {
// drawOptions.Color = Color.Green;
// legendDrawOptions.Color = Color.Green;
// }
// if (seriesPoint.Argument == "E")
// {
// drawOptions.Color = Color.Blue;
// legendDrawOptions.Color = Color.Blue;
// }
//});
chart.CustomDrawSeriesPoint += (sender, e) =>
{
if (e.SeriesDrawOptions is PieDrawOptions)
{
PieDrawOptions _drawOptions = e.SeriesDrawOptions as PieDrawOptions;
PieDrawOptions _legendDrawOptions = e.LegendDrawOptions as PieDrawOptions;
_drawOptions.FillStyle.FillMode = FillMode.Solid;
_legendDrawOptions.FillStyle.FillMode = FillMode.Solid;
setColorHander(_drawOptions, _legendDrawOptions, e.SeriesPoint);
}
};
}
