HeatmapLabel.Visible Property

Specifies whether heatmap labels are visible.

Namespace: DevExpress.XtraCharts.Heatmap

Assembly: DevExpress.XtraCharts.v21.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

[XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)]
public bool Visible { get; set; }

VB.NET

<XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)>
Public Property Visible As Boolean

Property Value

Type	Description
Boolean	true if labels are visible; otherwise, false.

Example

The following example shows how to configure heatmap cell label settings such as format, font, color, and so on.

Use the HeatmapControl.Label property to access label settings:

C#

using DevExpress.XtraCharts;
using DevExpress.XtraCharts.Heatmap;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace HeatmapMatrixAdapterSample {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();

            HeatmapControl heatmap = new HeatmapControl();
            this.Controls.Add(heatmap);

            heatmap.Dock = DockStyle.Fill;

            HeatmapMatrixAdapter dataAdapter = new HeatmapMatrixAdapter();
            dataAdapter.XArguments = new string[] { "North", "South", "West", "East", "Central" };
            dataAdapter.YArguments = new string[] { "Components", "Clothing", "Bikes", "Accessories" };
            dataAdapter.Values = new double[,] {
                { 21.3, 50.1, 63.2, 64.4, 33.4 },
                { 32.3, 54.4, 81.3, 53.4, 54.9 },
                { 60.3, 49.1, 42.6, 48.4, 65.4 },
                { 45.3, 54.7, 70.3, 66.4, 56.6 }
            };
            heatmap.DataAdapter = dataAdapter;
            Palette palette = new Palette("Custom") { Color.White, Color.SkyBlue, Color.DarkBlue };
            RangeColorProvider colorProvider = new RangeColorProvider() { Palette = palette, ApproximateColors = true };
            colorProvider.RangeStops.Add(new Unit(0, UnitType.Percentage));
            colorProvider.RangeStops.Add(new Unit(20, UnitType.Absolute));
            colorProvider.RangeStops.Add(new Unit(40, UnitType.Absolute));
            colorProvider.RangeStops.Add(new Unit(60, UnitType.Absolute));
            colorProvider.RangeStops.Add(new Unit(90, UnitType.Absolute));
            colorProvider.RangeStops.Add(new Unit(1, UnitType.Percentage));
            dataAdapter.ColorProvider = colorProvider;

            HeatmapLabel label = heatmap.Label;
            label.Visible = true;
            label.Pattern = "{V:f0}";
            label.BackColor = Color.White;
            label.Color = Color.Black;
            label.Font = new Font("SegoeUI", 10);
            label.TextOrientation = DevExpress.XtraCharts.Heatmap.TextOrientation.Horizontal;
            label.Border.Visibility = DevExpress.Utils.DefaultBoolean.True;
            label.Border.Color = Color.DarkGray;
            label.Border.Thickness = 2;
        }
    }
}

VB.NET

Imports DevExpress.XtraCharts
Imports DevExpress.XtraCharts.Heatmap
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Namespace HeatmapMatrixAdapterSample
    Public Partial Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent()
            Dim heatmap As HeatmapControl = New HeatmapControl()
            Me.Controls.Add(heatmap)
            heatmap.Dock = DockStyle.Fill
            Dim dataAdapter As HeatmapMatrixAdapter = New HeatmapMatrixAdapter()
            dataAdapter.XArguments = New String() {"North", "South", "West", "East", "Central"}
            dataAdapter.YArguments = New String() {"Components", "Clothing", "Bikes", "Accessories"}
            dataAdapter.Values = New Double(,) {
            {21.3, 50.1, 63.2, 64.4, 33.4},
            {32.3, 54.4, 81.3, 53.4, 54.9},
            {60.3, 49.1, 42.6, 48.4, 65.4},
            {45.3, 54.7, 70.3, 66.4, 56.6}}
            heatmap.DataAdapter = dataAdapter
            Dim palette As Palette = New Palette("Custom") From {
                System.Drawing.Color.White,
                System.Drawing.Color.SkyBlue,
                System.Drawing.Color.DarkBlue
            }
            Dim colorProvider As RangeColorProvider = New RangeColorProvider() With {
                .Palette = palette,
                .ApproximateColors = True
            }
            colorProvider.RangeStops.Add(New Unit(0, UnitType.Percentage))
            colorProvider.RangeStops.Add(New Unit(20, UnitType.Absolute))
            colorProvider.RangeStops.Add(New Unit(40, UnitType.Absolute))
            colorProvider.RangeStops.Add(New Unit(60, UnitType.Absolute))
            colorProvider.RangeStops.Add(New Unit(90, UnitType.Absolute))
            colorProvider.RangeStops.Add(New Unit(1, UnitType.Percentage))
            dataAdapter.ColorProvider = colorProvider
            Dim label As HeatmapLabel = heatmap.Label
            label.Visible = True
            label.Pattern = "{V:f0}"
            label.BackColor = System.Drawing.Color.White
            label.Color = System.Drawing.Color.Black
            label.Font = New Font("SegoeUI", 10)
            label.TextOrientation = DevExpress.XtraCharts.Heatmap.TextOrientation.Horizontal
            label.Border.Visibility = DevExpress.Utils.DefaultBoolean.True
            label.Border.Color = Color.DarkGray
            label.Border.Thickness = 2
        End Sub
    End Class
End Namespace

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Visible property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-heatmap-matrix-data/CS/Form1.cs#L43

heatmap.Label.Visible = true;
heatmap.Label.Pattern = "{V}";

winforms-heatmap-bind-to-data-source/CS/Form1.cs#L44

heatmap.Label.Visible = true;
heatmap.Label.Font = new Font("SegoeUI", 6);

winforms-dashboard-custom-items-extension/CS/CustomItemExtension/CustomItems/Heatmap/HeatmapItemControlProvider.cs#L36

protected override void UpdateControl(CustomItemData customItemData) {
    heatmap.Label.Visible = dashboardItem.Metadata.ShowLabels;
    heatmap.Legend.Visibility = dashboardItem.Metadata.ShowLegend ? DefaultBoolean.True : DefaultBoolean.False;

VB.NET

winforms-heatmap-matrix-data/VB/Form1.vb#L28

Me.heatmap.Titles.Add(New DevExpress.XtraCharts.Heatmap.HeatmapTitle With {.Text = "Sales by Categories"})
Me.heatmap.Label.Visible = True
Me.heatmap.Label.Pattern = "{V}"

winforms-dashboard-custom-items-extension/VB/CustomItemExtension/CustomItems/Heatmap/HeatmapItemControlProvider.vb#L42

Protected Overrides Sub UpdateControl(ByVal customItemData As CustomItemData)
    heatmap.Label.Visible = dashboardItem.Metadata.ShowLabels
    heatmap.Legend.Visibility = If(dashboardItem.Metadata.ShowLegend, DefaultBoolean.True, DefaultBoolean.False)