Menu for WPF | ComponentOne
Menu Overview / Radial Menu / Radial Numeric Slider Menu
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    Radial Numeric Slider Menu
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    The RadialMenu control allows you to create a radial numeric slider menu. This is especially useful for applications where you might want users to select a font size for an application. You'll use both XAML markup and code to create the application. 

    Complete the following steps to create a radial numeric slider menu:

    1. Locate the <Grid> </Grid> tags on your page and replace them with the following markup to create the framework for your application:
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              <Style TargetType="TextBlock" x:Key="TextIconStyle">
                  <Setter Property="Margin" Value="-10" />
                  <Setter Property="FontSize" Value="20" />
                  <Setter Property="FontFamily" Value="Segoe UI Symbol" />
                  <Setter Property="FontWeight" Value="Normal" />
                  <Setter Property="Foreground" Value="#333333" />
                  <Setter Property="HorizontalAlignment" Value="Center" />
                  <Setter Property="VerticalAlignment" Value="Center" />
              <Style TargetType="Image" x:Key="MenuIcon">
                  <Setter Property="Width" Value="16"/>
                  <Setter Property="Height" Value="16"/>
                  <Setter Property="Margin" Value="0"/>
          <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
              <c1:C1ListViewer x:Name="text" Foreground="Sienna" HorizontalAlignment="Stretch" VerticalAlignment="Center" Height="75" ZoomMode="Disabled" FontSize="16" >
                  <TextBlock Text="Touch: hold down for a few seconds until the indicator displays.&#10;Keyboard: press the context-menu button over this text.&#10;Mouse: right-click over this text." TextWrapping="Wrap" />
              <TextBlock x:Name="txt" Foreground="Red" Text="" FontSize="16" VerticalAlignment="Bottom" HorizontalAlignment="Center" Margin="10" />
    2. Locate the <c1:C1ContextMenuService.ContextMenu> </c1:C1ContextMenuService.ContextMenu> tags within the markup you just added. Place your cursor between the tags.
    3. Locate the C1RadialMenu control in the Visual Studio ToolBox and double-click it to add it to your application.
    4. Edit the opening <C1RadialMenu> tag so that it resembles the following:
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      <c1:C1RadialMenu x:Name="contextMenu" Offset="-130,0" Opened="contextMenu_Opened" AccentBrush="ForestGreen" ItemClick="contextMenu_ItemClick" ItemOpened="contextMenu_ItemOpened" BorderBrush="#FFC6DEC4">
    5. Add the following markup between the <C1RadialMenu> </C1RadialMenu> tags to add one C1RadialNumericItems to your application. Note that you are also adding several sub items and a custom item icon:
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      <c1:C1RadialNumericItem Header="Font Size" Minimum="9" Maximum="72" MarkStartAngle="-128" MarkEndAngle="231" x:Name="fontSize" Value="11">
            <TextBlock Style="{StaticResource TextIconStyle}" FontFamily="Segoe UI" FontSize="18">
               <Run Text="A"/>
               <Run Text="{Binding Value, ElementName=fontSize}" Typography.Variants="Superscript"/>
    6. Right-click the page and select View Code from the list.
    7. Add the following using statement to the top of the page:
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      using C1.WPF.Core;
      using C1.WPF.Menu;
    8. Add the following ItemClick event to the page. This will allow the size of the text in the TextBox control to change size depending on the item selected:
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      private void contextMenu_ItemClick(object sender, SourcedEventArgs e)
                  C1RadialMenuItem item = e.Source as C1RadialMenuItem;
      if (item is C1RadialNumericItem)
                      txt.FontSize = ((C1RadialNumericItem)item).Value;
                      txt.Text = "Item Clicked: " + ((C1RadialNumericItem)item).Value.ToString();
                      txt.Text = "Item Clicked: " + (item.Header ?? item.Name).ToString();
    9. Then, add two more events. This code will control the ItemOpened and Opened events:
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      private void contextMenu_ItemOpened(object sender, SourcedEventArgs e)
                  C1RadialMenuItem item = e.Source as C1RadialMenuItem;
                  txt.Text = "Item Opened: " + (item.Header ?? item.Name).ToString();
              private void contextMenu_Opened(object sender, EventArgs e)
                  // expand menu immediately, as in this sample we don't have    underlying editable controls
    10. Press F5 or start debugging to run your application. Your C1RadialMenu control should resemble the following:

    11. When you click on the Font Size option, the C1NumericRadialItems will be displayed: