HeatmapDataSourceAdapter.XArgumentComparer Property

Gets or sets a comparer that is used to specify custom sort order for x-arguments.

Namespace: DevExpress.Xpf.Charts.Heatmap

Assembly: DevExpress.Xpf.Charts.v24.1.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

[Browsable(false)]
public IComparer XArgumentComparer { get; set; }

VB.NET

<Browsable(False)>
Public Property XArgumentComparer As IComparer

Property Value

Type	Description
IComparer	An object that implements the IComparer interface.

Remarks

The following example sorts heatmap x-arguments:

Custom sort is applied to x-arguments.	X-arguments are shown in default order.

XAML

<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" 
    x:Class="HeatmapComparers.MainWindow"
    xmlns:local="clr-namespace:HeatmapComparers"
    Title="MainWindow" Height="800" Width="1000">
    <Grid>
        <dxh:HeatmapControl Width="360" Height="360">
            <dxh:HeatmapControl.DataContext>
                <local:MatrixHeatmapViewModel/>
            </dxh:HeatmapControl.DataContext>
            <dxh:HeatmapDataSourceAdapter DataSource="{Binding DataPoints}" 
                                          XArgumentDataMember="XArgument" 
                                          YArgumentDataMember="YArgument" 
                                          ColorDataMember="Value">
                <dxh:HeatmapDataSourceAdapter.XArgumentComparer>
                    <local:NumberComparer/>
                </dxh:HeatmapDataSourceAdapter.XArgumentComparer>
            </dxh:HeatmapDataSourceAdapter>
            <dxh:HeatmapControl.ColorProvider>
                <dxh:HeatmapObjectColorProvider/>
            </dxh:HeatmapControl.ColorProvider>
        </dxh:HeatmapControl>
    </Grid>
</dx:ThemedWindow>

C#

using DevExpress.Xpf.Core;
using System;
using System.Collections;
using System.Collections.Generic;
namespace HeatmapComparers {
    public partial class MainWindow : ThemedWindow {
        public MainWindow() {
            InitializeComponent();
        }
    }
    class NumberComparer : IComparer {
        public int Compare(object x, object y) {
            int iX = NumberConverter.ToInt(x);
            int iY = NumberConverter.ToInt(y);
            return iX - iY;
        }
    }
    class NumberConverter {
        public static int ToInt(object o) {
            string stringNumber = o as string;
            if (stringNumber == null) return -1;
            int number;
            if (Int32.TryParse(stringNumber, out number))
                return number;
            switch (stringNumber.ToLower()) {
                case "one": return 1;
                case "two": return 2;
                case "three": return 3;
            }
            return number;
        }
    }
    public class MatrixHeatmapViewModel {
        public List<DataPoint> DataPoints { get; set; }
        public MatrixHeatmapViewModel() {
            DataPoints = new List<DataPoint> {
                new DataPoint("Two",   "A", -454543),
                new DataPoint("Three", "A", -522512),
                new DataPoint("One",   "A", -4569871),
                new DataPoint("Two",   "B", -8454),
                new DataPoint("Three", "B", -455621),
                new DataPoint("One",   "B", -52485),
                new DataPoint("Two",   "C", -218785),
                new DataPoint("One",   "C", -12544),
                new DataPoint("Three", "C", -544521),
            };
        }
    }
    public class DataPoint {
        public string XArgument { get; set; }
        public string YArgument { get; set; }
        public double Value { get; set; }
        public DataPoint(string x, string y, double value) {
            this.XArgument = x;
            this.YArgument = y;
            this.Value = value;
        }        
    }
}

VB.NET

Imports DevExpress.Xpf.Core
Imports System.Collections
Imports System.Collections.Generic

Namespace HeatmapComparers
    Public Partial Class MainWindow
        Inherits ThemedWindow

        Public Sub New()
            InitializeComponent()
        End Sub
    End Class

    Friend Class NumberComparer
        Implements IComparer

        Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer Implements IComparer.Compare
            Dim iX As Integer = NumberConverter.ToInt(x)
            Dim iY As Integer = NumberConverter.ToInt(y)
            Return iX - iY
        End Function
    End Class

    Friend Class NumberConverter
        Public Shared Function ToInt(ByVal o As Object) As Integer
            Dim stringNumber As String = TryCast(o, String)
            If Equals(stringNumber, Nothing) Then Return -1
            Dim number As Integer
            If Integer.TryParse(stringNumber, number) Then Return number

            Select Case stringNumber.ToLower()
                Case "one"
                    Return 1
                Case "two"
                    Return 2
                Case "three"
                    Return 3
            End Select

            Return number
        End Function
    End Class

    Public Class MatrixHeatmapViewModel
        Public Property DataPoints As List(Of DataPoint)

        Public Sub New()
            DataPoints = New List(Of DataPoint) From {
                New DataPoint("Two", "A", -454543),
                New DataPoint("Three", "A", -522512),
                New DataPoint("One", "A", -4569871),
                New DataPoint("Two", "B", -8454),
                New DataPoint("Three", "B", -455621),
                New DataPoint("One", "B", -52485),
                New DataPoint("Two", "C", -218785),
                New DataPoint("One", "C", -12544),
                New DataPoint("Three", "C", -544521)
            }
        End Sub
    End Class

    Public Class DataPoint
        Public Property XArgument As String
        Public Property YArgument As String
        Public Property Value As Double

        Public Sub New(ByVal x As String, ByVal y As String, ByVal value As Double)
            XArgument = x
            YArgument = y
            Me.Value = value
        End Sub
    End Class
End Namespace