wpf-devexpress-dot-xpf-dot-charts-dot-heatmap-dot-heatmaphitinfo-4c4589f4.md
Indicates whether the test point is in a heatmap cell.
Namespace : DevExpress.Xpf.Charts.Heatmap
Assembly : DevExpress.Xpf.Charts.v25.2.dll
NuGet Package : DevExpress.Wpf.Charts
public bool InHeatmapCell { get; }
Public ReadOnly Property InHeatmapCell As Boolean
| Type | Description |
|---|---|
| Boolean |
true if the test point is within a heatmap cell; otherwise, false.
|
Use the InHeatmapCell property to check whether the test point is located within a heatmap cell.
To obtain a heatmap cell instance located under the test point, use the HeatmapCell property.
The following example shows how to determine what a heatmap element is in a test point and how to collect information related to this element.
Call the HeatmapControl.CalcHitInfo method to obtain information about a specific point within the Heatmap Control. This method returns a HeatmapHitInfo object that contains information related to heatmap elements positioned in the test point.
<Window xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
xmlns:dxh="http://schemas.devexpress.com/winfx/2008/xaml/heatmap"
x:Class="HeatmapChart.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:HeatmapChart"
xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
mc:Ignorable="d"
dx:ThemeManager.ThemeName="Office2019Colorful"
Title="MainWindow" Height="410" Width="728">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="130"/>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<dxe:TextEdit Grid.Column="0" x:Name="textEdit" TextWrapping="Wrap"
VerticalContentAlignment="Top" BorderBrush="Transparent"/>
<dxh:HeatmapControl x:Name="heatmapControl"
Grid.Column="1"
ToolTipEnabled="True" Margin="10"
MouseMove="heatmapControl_MouseMove">
<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.ColorProvider>
<!--...-->
</dxh:HeatmapControl.ColorProvider>
<dxh:HeatmapControl.Legend>
<dxh:HeatmapLegend Margin="0, 0, 4, 10" Visible="True">
<dxh:HeatmapLegend.Title>
<dxc:LegendTitle Content="Revenue" />
</dxh:HeatmapLegend.Title>
</dxh:HeatmapLegend>
</dxh:HeatmapControl.Legend>
<dxh:HeatmapControl.AxisX>
<dxh:HeatmapAxis x:Name="xAxis" Reverse="True" Alignment="Near"
AutoGrid="False" GridSpacing="1">
<dxh:HeatmapAxis.Title>
<dxc:AxisTitle Content="Region" Visibility="Visible"/>
</dxh:HeatmapAxis.Title>
<dxh:HeatmapAxis.Label>
<dxc:AxisLabel x:Name="xAxisLabel"/>
</dxh:HeatmapAxis.Label>
</dxh:HeatmapAxis>
</dxh:HeatmapControl.AxisX>
<dxh:HeatmapControl.AxisY>
<dxh:HeatmapAxis x:Name="yAxis" Reverse="True" Alignment="Near">
<dxh:HeatmapAxis.Title>
<dxc:AxisTitle Content="Product Category" Visibility="Visible"/>
</dxh:HeatmapAxis.Title>
<dxh:HeatmapAxis.Label>
<dxc:AxisLabel x:Name="yAxisLabel"/>
</dxh:HeatmapAxis.Label>
</dxh:HeatmapAxis>
</dxh:HeatmapControl.AxisY>
<dxh:HeatmapControl.Label>
<dxh:HeatmapLabel Foreground="Black"
Background="#70ffffff"
Padding="2"
TextOrientation="Horizontal"
TextPattern="${V}M"/>
</dxh:HeatmapControl.Label>
</dxh:HeatmapControl>
</Grid>
</Window>
using DevExpress.Xpf.Charts;
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Input;
namespace HeatmapChart {
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
}
private void heatmapControl_MouseMove(object sender, MouseEventArgs e) {
// Obtain hit information under the test point.
HeatmapHitInfo hitInfo = heatmapControl.CalcHitInfo(e.GetPosition(heatmapControl));
StringBuilder builder = new StringBuilder();
if (hitInfo.InAxis) builder.AppendLine($"In axis:");
if (hitInfo.AxisLabel != null)
builder.AppendLine($"Label: {hitInfo.AxisLabel.Name}");
if (hitInfo.AxisTitle != null)
builder.AppendLine($"Axis title: {hitInfo.AxisTitle.Content}");
if (hitInfo.InHeatmapCell)
builder.AppendLine($"In cell:{Environment.NewLine}X ({hitInfo.HeatmapCell.XArgument}),{Environment.NewLine}Y ({hitInfo.HeatmapCell.YArgument})");
if (hitInfo.InLegend)
builder.AppendLine($"In legend");
// Show hit-testing results.
if (builder.Length > 0)
textEdit.Text = string.Format($"Hit-testing results:{Environment.NewLine}{builder}");
else
textEdit.Text = "Move the mouse pointer over the heatmap to see information on hovered heatmap elements.";
}
}
public class MatrixHeatmapViewModel {
public string[] XArguments { get; set; }
public string[] YArguments { get; set; }
public double[,] Values { get; set; }
public MatrixHeatmapViewModel() {
XArguments = new string[] { "North", "South", "West", "East", "Central" };
YArguments = new string[] { "Accessories", "Bikes", "Clothing", "Components" };
Values = new double[,] {
{ 214.3, 530.1, 630.2, 854.4, 313.4 },
{ 321.3, 514.4, 281.3, 533.4, 541.9 },
{ 604.3, 429.1, 632.6, 438.4, 265.4 },
{ 485.3, 544.7, 740.3, 661.4, 516.6 }
};
}
}
}
Imports DevExpress.Xpf.Charts
Imports System
Imports System.Text
Namespace HeatmapChart
Public Partial Class MainWindow
Inherits Window
Public Sub New()
InitializeComponent()
End Sub
Private Sub heatmapControl_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
' Obtain hit information under the test point.
Dim hitInfo As HeatmapHitInfo = heatmapControl.CalcHitInfo(e.GetPosition(heatmapControl))
Dim builder As StringBuilder = New StringBuilder()
If hitInfo.InAxis Then builder.AppendLine($"In axis:")
If hitInfo.AxisLabel IsNot Nothing Then builder.AppendLine($"Label: {hitInfo.AxisLabel.Name}")
If hitInfo.AxisTitle IsNot Nothing Then builder.AppendLine($"Axis title: {hitInfo.AxisTitle.Content}")
If hitInfo.InHeatmapCell Then builder.AppendLine($"In cell:{Environment.NewLine}X ({hitInfo.HeatmapCell.XArgument}),{Environment.NewLine}Y ({hitInfo.HeatmapCell.YArgument})")
If hitInfo.InLegend Then builder.AppendLine($"In legend")
' Show hit-testing results.
If builder.Length > 0 Then
textEdit.Text = String.Format($"Hit-testing results:{Environment.NewLine}{builder}")
Else
textEdit.Text = "Move the mouse pointer over the heatmap to see information on hovered heatmap elements."
End If
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