HamburgerSubMenuThemeSelectorBehavior Class

Populates the associated HamburgerSubMenu with available themes and allows you to choose the application’s theme.

Namespace: DevExpress.Xpf.WindowsUI

Assembly: DevExpress.Xpf.Controls.v22.1.dll

NuGet Package: DevExpress.Wpf.Controls

Declaration

C#

[TargetType(typeof(HamburgerSubMenu))]
public class HamburgerSubMenuThemeSelectorBehavior :
    ThemeSelectorBehavior<HamburgerSubMenu>

VB.NET

<TargetType(GetType(HamburgerSubMenu))>
Public Class HamburgerSubMenuThemeSelectorBehavior
    Inherits ThemeSelectorBehavior(Of HamburgerSubMenu)

Remarks

To use the HamburgerSubMenuThemeSelectorBehavior, attach it to a HamburgerSubMenu:

XAML

<Window ...
    xmlns:dxwui="http://schemas.devexpress.com/winfx/2008/xaml/windowsui"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm">
    <Grid>
        <dxwui:HamburgerMenu>
            <dxwui:HamburgerSubMenu>
                <dxmvvm:Interaction.Behaviors>
                    <dxwui:HamburgerSubMenuThemeSelectorBehavior/>
                </dxmvvm:Interaction.Behaviors>
            </dxwui:HamburgerSubMenu>
        </dxwui:HamburgerMenu>
    </Grid>
</Window>

View Example: How to Implement a Theme Selector Based on a Hamburger SubMenu

Display Themes in the HamburgerSubMenu Preview

You can pass a theme name to the PreviewThemeNames property to display themes in the HamburgerSubMenu preview. If you specify multiple themes, separate them with a comma.

The following code sample displays the VS2017Light VS2017Dark, Office2019White, and Office2019HighContrast themes in the HamburgerSubMenu preview:

XAML

<Window x:Class="HamburgerSubMenuThemeSelectorBehavior.MainWindow"
<!-- ... -->
        xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
        xmlns:dxwui="http://schemas.devexpress.com/winfx/2008/xaml/windowsui"
        <!-- ... -->
    <Grid>
        <dxwui:HamburgerMenu>
            <dxwui:HamburgerSubMenu>
                <dxmvvm:Interaction.Behaviors>
                    <dxwui:HamburgerSubMenuThemeSelectorBehavior ShowTouchThemes="False" PreviewThemeNames="VS2017Light,VS2017Dark,Office2019White,Office2019HighContrast"/>
                </dxmvvm:Interaction.Behaviors>
            </dxwui:HamburgerSubMenu>

        </dxwui:HamburgerMenu>
    </Grid>
</Window>

Persist Theme Selection between Application Runs

You can save the application’s theme to the configuration file and restore it in the next application run.

To save an applied theme, use the static ApplicationThemeHelper.SaveApplicationThemeName method to save the theme name specified in the static ApplicationThemeHelper.ApplicationThemeName property:

App.xaml.cs

private void Application_Exit(object sender, StartupEventArgs e) {
    ApplicationThemeHelper.SaveApplicationThemeName();
}        

App.xaml.vb

Private Sub Application_Exit(ByVal sender As Object, ByVal e As StartupEventArgs)
    ApplicationThemeHelper.SaveApplicationThemeName()
End Sub

Call the static ApplicationThemeHelper.UpdateApplicationThemeName method to retrieve the theme name from the configuration file.

App.xaml.cs

private void Application_Startup(object sender, ExitEventArgs e) {
    ApplicationThemeHelper.UpdateApplicationThemeName();
}

App.xaml.vb

Private Sub Application_Startup(ByVal sender As Object, ByVal e As StartupEventArgs)
    ApplicationThemeHelper.UpdateApplicationThemeName()
End Sub

Display Windows System Color Theme

You can set the inherited ShowWin10SystemColorTheme property to true to display the Windows 10 System Colors theme in the theme selector. This theme takes the Windows app mode and accent color settings, applies it to your application, and updates your app appearance when a user changes these OS settings.

Refer to the following topic for more information: Use Windows Accent Color and App Mode.

Hide Themes from Theme Selector

You can use the Theme.ShowInThemeSelector property to hide a theme/theme category from the HamburgerSubMenuThemeSelectorBehavior‘s theme gallery.

The following code sample hides Office2007 and Metropolis theme categories, and the DeepBlue application theme:

MainWindow.xaml

<Window ...
    xmlns:dxwui="http://schemas.devexpress.com/winfx/2008/xaml/windowsui"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm">
    <Grid>
        <dxwui:HamburgerMenu>
            <dxwui:HamburgerSubMenu>
                <dxmvvm:Interaction.Behaviors>
                    <dxwui:HamburgerSubMenuThemeSelectorBehavior/>
                </dxmvvm:Interaction.Behaviors>
            </dxwui:HamburgerSubMenu>
        </dxwui:HamburgerMenu>
    </Grid>
</Window>

App.xaml.cs

using DevExpress.Xpf.Core;

public partial class App : Application {
    public App() {
        foreach (Theme theme in Theme.Themes.ToList()) {
            if (theme.Category == Theme.Office2007Category ||
                theme.Category == Theme.MetropolisCategory || 
                theme.Name == "DeepBlue") theme.ShowInThemeSelector = false;
        }
    }
}

App.xaml.vb

Imports DevExpress.Xpf.Core

Public Partial Class App
    Inherits Application

    Public Sub New()
        For Each theme As Theme In Theme.Themes.ToList()
            If theme.Category = Theme.Office2007Category OrElse theme.Category = Theme.MetropolisCategory OrElse theme.Name = "DeepBlue" Then theme.ShowInThemeSelector = False
        Next
    End Sub
End Class

Hide Touch Themes

Set the behavior’s inherited ShowTouchThemes property to false to hide touch themes from the HamburgerSubMenuThemeSelectorBehavior‘s theme gallery:

XAML

<Window ...
    xmlns:dxwui="http://schemas.devexpress.com/winfx/2008/xaml/windowsui"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm">
    <Grid>
        <dxwui:HamburgerMenu>
            <dxwui:HamburgerSubMenu>
                <dxmvvm:Interaction.Behaviors>
                    <dxwui:HamburgerSubMenuThemeSelectorBehavior ShowTouchThemes="False"/>
                </dxmvvm:Interaction.Behaviors>
            </dxwui:HamburgerSubMenu>
        </dxwui:HamburgerMenu>
    </Grid>
</Window>

Inheritance

Object

DispatcherObject

DependencyObject

Freezable

Animatable

DevExpress.Mvvm.UI.Interactivity.AttachableObjectBase

DevExpress.Mvvm.UI.Interactivity.Behavior

DevExpress.Mvvm.UI.Interactivity.Behavior<HamburgerSubMenu>

DevExpress.Xpf.Bars.ThemeSelectorBehavior<HamburgerSubMenu>

HamburgerSubMenuThemeSelectorBehavior