The C1RadialColorItem class allows you to create a color picker using the C1RadialMenu control. In this topic, you'll create a C1RadialMenu application and add C1RadialColorItems to the C1RadialMenu control. You'll use both XAML markup and code to create the application.

Complete the following steps to create a color picker radial menu:

1. Locate the <Grid></Grid> tags on your page and replace then with the following markup to create the framework for your application:

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   <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Border Background="LemonChiffon" MinHeight="40" BorderBrush="#969696" BorderThickness="1" Padding="5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"> <c1:C1ContextMenuService.ContextMenu> </c1:C1ContextMenuService.ContextMenu> <c1:C1ListViewer x:Name="text" Foreground="Sienna" HorizontalAlignment="Stretch" VerticalAlignment="Center" Height="75" ZoomMode="Disabled"> <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." FontSize="16" TextWrapping="Wrap" /> </c1:C1ListViewer> </Border> <TextBlock x:Name="txt" Foreground="Red" Text="" FontSize="16" VerticalAlignment="Bottom" HorizontalAlignment="Center" Margin="10" /> </Grid>

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" ItemClick="contextMenu_ItemClick" >

5. Add the following markup between the <C1RadialMenu></C1RadialMenu> tags to add three C1RadialColorItems to your application:

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   <c1:C1RadialColorItem x:Name="rainbowItem" ShowSelectedItem="True" AutoSelect="True" IsSelectable="False" > </c1:C1RadialColorItem> <c1:C1RadialColorItem x:Name="greenItem" SelectedIndex="5" ShowSelectedItem="True" AutoSelect="True" IsSelectable="False" > </c1:C1RadialColorItem> <c1:C1RadialColorItem x:Name="blueItem" SelectedIndex="0" ShowSelectedItem="True" AutoSelect="True" IsSelectable="False" > </c1:C1RadialColorItem>

6. Select the C1RadialColorItem named “rainbowItem” and insert the following markup between the opening and closing tags. This will add SolidColorBrush submenu items:

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   <SolidColorBrush Color="Red"/> <SolidColorBrush Color="Orange"/> <SolidColorBrush Color="Yellow"/> <SolidColorBrush Color="Green"/> <SolidColorBrush Color="Blue"/> <SolidColorBrush Color="Indigo"/> <SolidColorBrush Color="Violet"/>

7. Select the “greenItem” C1RadialColorItem and insert the following markup between the opening and closing tags. This will add C1RadialColorItem submenu items in shades of green:

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   <c1:C1RadialColorItem x:Name="greenItem" SelectedIndex="5" ShowSelectedItem="True" AutoSelect="True" IsSelectable="False"> <c1:C1RadialColorItem ToolTip="Lime" Brush="#FF92D050" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Light Green" Brush="#FFC6EFCE" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Green" Brush="#FF00FF00" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Dark Green" Brush="#FF1D421E" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Dark Green" Brush="#FF1D5A2D" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Dark Green" Brush="Green" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Dark Green" Brush="#FF008000" GroupName="Green"/> <c1:C1RadialColorItem ToolTip="Dark Green" Brush="#FF00B050" GroupName="Green"/> </c1:C1RadialColorItem>

8. Select the “blueItem” C1RadialColorItem and insert the following markup between the opening and closing tags. This will add C1RadialColorItem submenu items in shades of blue:

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   <c1:C1RadialColorItem x:Name="blueItem" SelectedIndex="0" ShowSelectedItem="True" AutoSelect="True" IsSelectable="False" > <c1:C1RadialColorItem ToolTip="Blue" Brush="Blue" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Slate Blue" Brush="MediumSlateBlue" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Turquoise" Brush="Turquoise" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Aqua" Brush="Aqua" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Sky Blue" Brush="SkyBlue" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Purple" Brush="#FFAC38AC" AccentBrush="#FF801C80" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Dark Purple" Brush="Purple" GroupName="Blue"/> <c1:C1RadialColorItem ToolTip="Dark Blue" Brush="DarkBlue" GroupName="Blue"/> </c1:C1RadialColorItem>

9. Right-click the page and select View Code from the list.
10. Add the following using statement to the top of the page:

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    using C1.WPF.Core; using C1.WPF.Menu;

11. Add the following ItemClick event to the page. This will allow the text you added to your main page to change color when you select one of the colors from the C1RadialMenu:

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    private void contextMenu_ItemClick(object sender, SourcedEventArgs e) { C1RadialMenuItem item = e.Source as C1RadialMenuItem; if (item is C1RadialColorItem) { this.text.Foreground = ((C1RadialColorItem)item).Brush; txt.Text = "Item Clicked: " + ((C1RadialColorItem)item).Color.ToString(); } else { txt.Text = "Item Clicked: " + (item.Header ?? item.Name).ToString(); } }

12. Press F5 or start debugging to run your application. When you right-click or right-tap the application and open the C1RadialMenu, it should resemble the following image: