wpf-devexpress-dot-xpf-dot-charts-dot-heatmap-dot-heatmappalettecolorprovider-57008aee.md
Gets or sets the color provider palette.
Namespace : DevExpress.Xpf.Charts.Heatmap
Assembly : DevExpress.Xpf.Charts.v25.2.dll
NuGet Package : DevExpress.Wpf.Charts
public Palette Palette { get; set; }
Public Property Palette As Palette
| Type | Description |
|---|---|
| Palette |
Specifies the color provider palette.
|
You can use one of the Palette descendants to specify the Palette property.
<dx:ThemedWindow
xmlns:dxh="http://schemas.devexpress.com/winfx/2008/xaml/heatmap"
xmlns:System="clr-namespace:System;assembly=mscorlib"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts" >
<Grid>
<dxh:HeatmapControl>
<dxh:HeatmapControl.ColorProvider>
<dxh:HeatmapKeyColorProvider>
<dxh:HeatmapKeyColorProvider.Palette>
<dxc:SlipstreamPalette/>
</dxh:HeatmapKeyColorProvider.Palette>
</dxh:HeatmapKeyColorProvider>
</dxh:HeatmapControl.ColorProvider>
</dxh:HeatmapControl>
</Grid>
</dx:ThemedWindow>
It is possible to create a custom palette as follows:
<dxh:HeatmapKeyColorProvider.Palette>
<dxc:CustomPalette>
<dxc:CustomPalette.Colors>
<Color>LightGreen</Color>
<Color>Yellow</Color>
<Color>IndianRed</Color>
</dxc:CustomPalette.Colors>
</dxc:CustomPalette>
</dxh:HeatmapKeyColorProvider.Palette>
This example shows how to use arrays of string and numeric values to create a heatmap.
Follow the steps below to create a heatmap:
Add the HeatmapControl to the project.
Create a HeatmapMatrixAdapter object and assign it to the HeatmapControl.DataAdapter property.
Use the adapter’s XArguments and YArguments properties to populate the heatmap with x- and y-arguments that are displayed along x- and y-axes.
Assign a two-dimensional array of double values to the adapter’s Values property.
Create a HeatmapRangeColorProvider object and assign it to the HeatmapControl.ColorProvider property. The Range Color Provider paints cells based on a value range to which the cell value belongs.
Set the HeatmapControl.Legend property to a HeatmapLegend object to display a legend.
Use the HeatmapControl.AxisX and HeatmapControl.AxisY properties to customize heatmap axes.
To display cell labels, initialize the HeatmapControl.Label property with a HeatmapLabel object.
<dx:ThemedWindow
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
xmlns:dxh="http://schemas.devexpress.com/winfx/2008/xaml/heatmap"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
xmlns:local="clr-namespace:HeatmapMatrixData"
x:Class="HeatmapMatrixData.MainWindow"
Title="Heatmap" Height="500" Width="800">
<Grid>
<dxh:HeatmapControl>
<dxh:HeatmapControl.DataContext>
<local:MatrixHeatmapViewModel/>
</dxh:HeatmapControl.DataContext>
<dxh:HeatmapControl.DataAdapter>
<dxh:HeatmapMatrixAdapter XArguments="{Binding XArguments}"
YArguments="{Binding YArguments}"
Values="{Binding Values}"/>
</dxh:HeatmapControl.DataAdapter>
<dxh:HeatmapControl.Titles>
<dxc:Title Content="Sales by Categories" HorizontalAlignment="Center"/>
</dxh:HeatmapControl.Titles>
<dxh:HeatmapControl.ColorProvider>
<dxh:HeatmapRangeColorProvider ApproximateColors="True"
LegendItemPattern="${V1}-{V2}K">
<dxh:HeatmapRangeColorProvider.Palette>
<dxc:CustomPalette>
<dxc:CustomPalette.Colors>
<Color>White</Color>
<Color>SkyBlue</Color>
<Color>DarkBlue</Color>
</dxc:CustomPalette.Colors>
</dxc:CustomPalette>
</dxh:HeatmapRangeColorProvider.Palette>
<dxh:HeatmapRangeColorProvider.RangeStops>
<dxh:HeatmapRangeStop Value="0" Type="Percentage"/>
<dxh:HeatmapRangeStop Value="200"/>
<dxh:HeatmapRangeStop Value="400"/>
<dxh:HeatmapRangeStop Value="600"/>
<dxh:HeatmapRangeStop Value="800"/>
<dxh:HeatmapRangeStop Value="1" Type="Percentage"/>
</dxh:HeatmapRangeColorProvider.RangeStops>
</dxh:HeatmapRangeColorProvider>
</dxh:HeatmapControl.ColorProvider>
<dxh:HeatmapControl.Legend>
<dxh:HeatmapLegend Margin="0, 0, 4, 10">
<dxh:HeatmapLegend.Title>
<dxc:LegendTitle Content="Revenue"/>
</dxh:HeatmapLegend.Title>
</dxh:HeatmapLegend>
</dxh:HeatmapControl.Legend>
<dxh:HeatmapControl.AxisX>
<dxh:HeatmapAxis>
<dxh:HeatmapAxis.Title>
<dxc:AxisTitle Content="Region"/>
</dxh:HeatmapAxis.Title>
</dxh:HeatmapAxis>
</dxh:HeatmapControl.AxisX>
<dxh:HeatmapControl.AxisY>
<dxh:HeatmapAxis Reverse="True">
<dxh:HeatmapAxis.Title>
<dxc:AxisTitle Content="Category"/>
</dxh:HeatmapAxis.Title>
</dxh:HeatmapAxis>
</dxh:HeatmapControl.AxisY>
<dxh:HeatmapControl.Label>
<dxh:HeatmapLabel Foreground="Black"
Background="#70ffffff"
Padding="2"/>
</dxh:HeatmapControl.Label>
</dxh:HeatmapControl>
</Grid>
</dx:ThemedWindow>
using DevExpress.Xpf.Core;
namespace HeatmapMatrixData {
public partial class MainWindow : ThemedWindow {
public MainWindow() {
InitializeComponent();
}
}
public class MatrixHeatmapViewModel {
public string[] XArguments { get; set; }
public string[] YArguments { get; set; }
public double[,] Values { get; set; }
public MatrixHeatmapViewModel() {
XArguments = new string[] { "North", "South", "West", "East", "Central" };
YArguments = new string[] { "Accessories", "Bikes", "Clothing", "Components" };
Values = new double[,] {
{ 214.3, 530.1, 630.2, 854.4, 313.4 },
{ 321.3, 514.4, 281.3, 533.4, 541.9 },
{ 604.3, 429.1, 632.6, 438.4, 265.4 },
{ 485.3, 544.7, 740.3, 661.4, 516.6 }
};
}
}
}
Imports DevExpress.Xpf.Core
Namespace HeatmapMatrixData
Public Partial Class MainWindow
Inherits ThemedWindow
Public Sub New()
Me.InitializeComponent()
End Sub
End Class
Public Class MatrixHeatmapViewModel
Public Property XArguments As String()
Public Property YArguments As String()
Public Property Values As Double(,)
Public Sub New()
XArguments = New String() {"North", "South", "West", "East", "Central"}
YArguments = New String() {"Accessories", "Bikes", "Clothing", "Components"}
Values = New Double(,) {{214.3, 530.1, 630.2, 854.4, 313.4}, {321.3, 514.4, 281.3, 533.4, 541.9}, {604.3, 429.1, 632.6, 438.4, 265.4}, {485.3, 544.7, 740.3, 661.4, 516.6}}
End Sub
End Class
End Namespace
See Also
HeatmapPaletteColorProvider Class