CustomDrawSeriesEventArgsBase.SeriesDrawOptions Property
Returns the draw settings of the series that is currently being drawn.
Namespace: DevExpress.XtraCharts
Assembly: DevExpress.XtraCharts.v24.2.dll
Declaration
Property Value
| Type | Description |
|---|---|
| DrawOptions | An object of the DrawOptions class descendant, which stores the draw options of the series currently being drawn. |
Remarks
This example demonstrates how to use the ChartControl.CustomDrawSeries event to modify the legend markers of bar series.
Assign a custom legend marker to the e.LegendMarkerImage property. Set the e.DisposeLegendMarkerImage property to true to avoid memory leaks. To customize options used to draw the series, cast e.SeriesDrawOptions to the DrawOptions class descendant that stores draw options of the required series view type.
using CustomDrawingSample.Model;
using DevExpress.Drawing;
using DevExpress.XtraCharts;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Linq;
namespace CustomDrawingSample {
public partial class Form1 : DevExpress.XtraEditors.XtraForm {
string trackedSeriesName;
Dictionary<string, DXImage> photoCache = new Dictionary<string, DXImage>();
#region #Constants
const int borderSize = 5;
const int scaledPhotoWidth = 48;
const int scaledPhotoHeight = 51;
// Width and height of scaled photo with border.
const int totalWidth = 58;
const int totalHeight = 61;
// Rects required to create a custom legend series marker.
static readonly Rectangle photoRect = new Rectangle(
borderSize, borderSize,
scaledPhotoWidth, scaledPhotoHeight);
static readonly Rectangle totalRect = new Rectangle(
0, 0,
totalWidth, totalHeight);
#endregion
public Form1() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
using (var context = new NwindDbContext()) {
InitPhotoCache(context.Employees);
chart.DataSource = context.Orders.ToList();
}
chart.SeriesDataMember = "Employee.FullName";
chart.SeriesTemplate.ArgumentDataMember = "OrderDate";
chart.SeriesTemplate.ValueDataMembers.AddRange("Freight");
XYDiagram diagram = chart.Diagram as XYDiagram;
if (diagram != null) {
diagram.AxisX.DateTimeScaleOptions.AggregateFunction = AggregateFunction.Sum;
diagram.AxisX.DateTimeScaleOptions.MeasureUnit = DateTimeMeasureUnit.Year;
}
chart.CustomDrawSeries += OnCustomDrawSeries;
chart.ObjectHotTracked += OnObjectHotTracked;
}
private void OnObjectHotTracked(object sender, HotTrackEventArgs e) {
trackedSeriesName = e.HitInfo.InSeries ? ((Series)e.HitInfo.Series).Name : null;
}
void InitPhotoCache(IEnumerable<Employee> employees) {
photoCache.Clear();
foreach (var employee in employees) {
using (MemoryStream stream = new MemoryStream(employee.Photo)) {
if (!photoCache.ContainsKey(employee.FullName))
photoCache.Add(employee.FullName, DXImage.FromStream(stream));
}
}
}
#region #CustomDrawSeriesImplementation
private void OnCustomDrawSeries(object sender, CustomDrawSeriesEventArgs e) {
bool isSelected = e.Series.Name.Equals(trackedSeriesName);
// Design a series marker image.
DXBitmap image = new DXBitmap(totalWidth, totalHeight);
using (DXGraphics graphics = DXGraphics.FromImage(image)) {
using (var fillBrush = isSelected ? (DXBrush)new DXHatchBrush(DXHatchStyle.DarkDownwardDiagonal,
e.LegendDrawOptions.Color,
e.LegendDrawOptions.ActualColor2)
: (DXBrush)new DXSolidBrush(e.LegendDrawOptions.Color)) {
graphics.FillRectangle(fillBrush, totalRect);
}
DXImage photo;
if (photoCache.TryGetValue(e.Series.Name, out photo))
graphics.DrawImage(photo, photoRect);
}
e.DXLegendMarkerImage = image;
e.DisposeLegendMarkerImage = true;
BarDrawOptions options = e.SeriesDrawOptions as BarDrawOptions;
if (options != null && isSelected) {
options.FillStyle.FillMode = DevExpress.XtraCharts.FillMode.Hatch;
((HatchFillOptions)options.FillStyle.Options).HatchStyle = HatchStyle.DarkDownwardDiagonal;
}
}
#endregion
}
}
Related GitHub Examples
The following code snippets (auto-collected from DevExpress Examples) contain references to the SeriesDrawOptions property.
Note
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