Highlight Colors Difference Between MS Word and RadRichTextBox

Environment

Product Version	2024.2.514
Product	RadRichTextBox for WPF

Description

The highlight colors that the RadRichTextBox control provides differ from the ones that are present in Microsoft Word. This cause the DOCX format to not use these additional colors when exporting a paragraph.

Solution

Change the colors of the color picker in the selection mini toolbar of the RadRichTextBox control. To do so, create a custom SelectionMiniToolBar and override the OnApplyTemplate method. In it, you can customize the colors of the MainPaletteItemsSource property of the HighlightColorPicker element.

The following example showcases this approach for a .NET Framework project. It will utilize the CustomSelectionMiniToolBar attribute, which the MEF support will read and use this custom implementation:

Custom SelectionMiniToolBar for a .NET Framework project

[CustomSelectionMiniToolBar] 
public class CustomSelectionMiniToolBar : SelectionMiniToolBar 
{ 
    public override void OnApplyTemplate() 
    { 
        // It is mandatory to call the base OnApplyTemplate. 
        base.OnApplyTemplate(); 
 
        this.SetHighlightColorPallete(); 
    } 
 
    private void SetHighlightColorPallete() 
    { 
        List<Color> colors = new List<Color> 
        { 
            Colors.Red, 
            Colors.Green, 
            Colors.Blue 
        }; 
 
        this.HighlightColorPicker.HeaderPaletteVisibility = System.Windows.Visibility.Hidden; 
        this.HighlightColorPicker.StandardPaletteVisibility = System.Windows.Visibility.Hidden; 
 
        this.HighlightColorPicker.MainPaletteItemsSource = colors; 
 
    } 
} 

The following example showcases this approach for a .NET project. Since the MEF functionality is no longer supported by the .NET 6 and later versions, set a new instance of the CustomSelectionMiniToolBar element to the SelectionMiniToolBar property of RadRichTextBox.

Custom SelectionMiniToolBar for a .NET project

//CustomSelectionMiniToolBar attribute is not present 
public class CustomSelectionMiniToolBar : SelectionMiniToolBar 
{ 
    public override void OnApplyTemplate() 
    { 
        // It is mandatory to call the base OnApplyTemplate. 
        base.OnApplyTemplate(); 
 
        this.SetHighlightColorPallete(); 
    } 
 
    private void SetHighlightColorPallete() 
    { 
        List<Color> colors = new List<Color> 
        { 
            Colors.Red, 
            Colors.Green, 
            Colors.Blue 
        }; 
 
        this.HighlightColorPicker.HeaderPaletteVisibility = System.Windows.Visibility.Hidden; 
        this.HighlightColorPicker.StandardPaletteVisibility = System.Windows.Visibility.Hidden; 
 
        this.HighlightColorPicker.MainPaletteItemsSource = colors; 
 
    } 
} 

Setting the custom SelectionMiniToolBar to the RadRichTextBox control

this.richTextBox.SelectionMiniToolBar = new CustomSelectionMiniToolBar();  

RadRichTextBox with a custom SelectionMiniToolBar