ShapeGradientFill Interface
Defines the settings of the gradient fill applied to a chart element.
Namespace: DevExpress.Spreadsheet.Drawings
Assembly: DevExpress.Spreadsheet.v19.1.Core.dll
Declaration
Remarks
To access an object exposing the ShapeGradientFill interface, use the ShapeOutlineFill.GradientFill property.
To apply a gradient fill to a chart element, call the ShapeOutlineFill.SetGradientFill method. Then, use the ShapeGradientFill object’s properties to adjust the gradient settings (to add additional gradient stops by utilizing the ShapeGradientFill.Stops property, set the angle of the gradient fill by using the ShapeGradientFill.Angle property or specify a region of the chart element to which the gradient is applied via the ShapeGradientFill.TileRect property).
The ShapeGradientFill interface inherits the specific fill options from the ShapeComplexFill interface. These options allow you to set the gradient direction (ShapeComplexFill.FillRect) and specify whether the fill should be rotated with the shape (ShapeComplexFill.RotateWithShape).
Example
The example below demonstrates how to create a clustered column chart and adjust its appearance. First, add the chart title and change the font color via the ShapeTextFont.Color property. Make the plot area transparent by using the ShapeOutlineFill.SetNoFill method, and then apply the gradient fill to the chart area by utilizing the ShapeOutlineFill.SetGradientFill method. To set the picture fill for all columns in a chart, call the ShapeFill.SetPictureFill method for a series object. Finally, change the color of the primary axes by utilizing the ShapeOutlineFill.SetSolidFill method and specify the axis width via the ShapeOutline.Width property.
Note
A complete sample project is available in the DevExpress-Examples/spreadsheet-chart-api-examples-t132724 repository on GitHub.
Worksheet worksheet = workbook.Worksheets["chartTask7"];
workbook.Worksheets.ActiveWorksheet = worksheet;
// Create a chart and specify its location.
Chart chart = worksheet.Charts.Add(ChartType.ColumnClustered, worksheet["B2:C8"]);
chart.TopLeftCell = worksheet.Cells["F2"];
chart.BottomRightCell = worksheet.Cells["N17"];
// Add and format the chart title.
chart.Title.SetValue("Countries with the largest forest area");
chart.Title.Font.Color = Color.FromArgb(0x34, 0x5E, 0x25);
// Set no fill for the plot area.
chart.PlotArea.Fill.SetNoFill();
// Apply the gradient fill to the chart area.
chart.Fill.SetGradientFill(ShapeGradientType.Linear, Color.FromArgb(0xFD, 0xEA, 0xDA), Color.FromArgb(0x77, 0x93, 0x3C));
ShapeGradientFill gradientFill = chart.Fill.GradientFill;
gradientFill.Stops.Add(0.78f, Color.FromArgb(0xB7, 0xDE, 0xE8));
gradientFill.Angle = 90;
// Set the picture fill for the data series.
chart.Series[0].Fill.SetPictureFill("Pictures\\PictureFill.png");
// Customize the axis appearance.
AxisCollection axisCollection = chart.PrimaryAxes;
foreach (Axis axis in axisCollection)
{
axis.MajorTickMarks = AxisTickMarks.None;
axis.Outline.SetSolidFill(Color.FromArgb(0x34, 0x5E, 0x25));
axis.Outline.Width = 1.25;
}
// Change the scale of the value axis.
Axis valueAxis = axisCollection[1];
valueAxis.Scaling.AutoMax = false;
valueAxis.Scaling.Max = 8000000;
valueAxis.Scaling.AutoMin = false;
valueAxis.Scaling.Min = 0;
// Specify display units for the value axis.
valueAxis.DisplayUnits.UnitType = DisplayUnitType.Thousands;
valueAxis.DisplayUnits.ShowLabel = true;
// Hide the legend.
chart.Legend.Visible = false;