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RadImageEditor comes with a predefined UI out of the box – RadImageEditorUI. As it uses XAML only, you can easily customize it for your application, by adding or removing tools that can be executed.

The tools and commands that the editor can execute are ImageToolItems. They are grouped into sections depending on the modification they perform on the image. In the default template, these ImageToolSections can be minimized and maximized using RadExpander. Moreover, each ImageToolItem specifies:

  • Command property: A command which will be executed when you select the ImageToolItem, e.g. CropCommand.
    When it comes to image editing tools which have settings and a live preview, they are passed as parameters to the ExecuteToolCommand. The values of the parameters of these tools are obtained from their SettingsUI, which are shown in a SettingsContainer on the right of the image.

  • ImageKey property: Sets the image that will be used as an icon in the ImageToolItem. Telerik.Windows.Controls.ImageEditor contains images mapped to the following ImageKeys:

    • Blur

    • Contrast

    • Crop

    • Draw

    • DrawText

    • FlipHorizontal

    • FlipVertical

    • HueShift

    • Invert

    • Pan

    • Resize

    • Rotate180CW

    • Rotate90CCW

    • Rotate90CW

    • RoundCorners

    • Saturation

    • Shape

    • Sharpen

Example 1 shows how a RadImageEditorUI with only a resize tool added looks like.

[XAML] Example 1: RadImageEditorUI with a resize tool

<telerik:RadImageEditorUI x:Name="ImageEditorUI">
        <telerik:ImageToolsSection Header="Transform">
            <telerik:ImageToolItem ImageKey="Resize" Text="Resize" Command="commands:ImageEditorRoutedCommands.ExecuteTool">
                    <tools:ResizeTool x:Name="resizeTool" />

The namespaces that have to be registered are listed in Example 2

[XAML] Example 2: Required namespaces


The code that defines the default UI and includes all implemented image editing tools is available in the First Look example from our SDK repository.

The image to be used will be chosen depending on the Theme applied to the editor, so that the best look of the editor be ensured. You can also use another image by setting the Image property instead of the ImageKey.

[XAML] Example 3: Set the Image property

<telerik:ImageToolItem Text="Resize" Image="/RadImageEditorApplication;component/Images/resize.png" Command="commands:ImageEditorRoutedCommands.ExecuteTool">
        <tools:ResizeTool x:Name="resizeTool1" />

You can see how the tools and commands can be declared in code-behind and modified on the fly in the CustomizingDefaultUI demo at http://demos.telerik.com/silverlight/#ImageEditor/CustomizingDefaultUI.

A custom UI that is not based on RadImageEditorUI can also be created and used. This approach is illustrated in the demo CustomUI, which can be viewed here: http://demos.telerik.com/silverlight/#ImageEditor/CustomUI.

See Also