[Solved] How to refresh StandardPaletteItemsSource

[Terry]

Hi:

I have a collection of custom colors:

private Collection<Color> CustomColors = new Collection<Color>();

I have a color picker:

<telerikRibbonBar:RadRibbonDropDownButton x:Name="btnFillColorPicker" Background="White" Width="26"
    telerikRibbonBar:ScreenTip.Title="Select Fill Color"
    telerikRibbonBar:ScreenTip.Description="When you click the bucket button, the selected color will be used to fill the selected object."
    HorizontalAlignment="Center" Click="BackgroundColor_Button_Click">
    <telerikRibbonBar:RadRibbonDropDownButton.DropDownContent>
        <telerikInput:RadColorSelector x:Name="FillColor_Selector" Loaded="RadColorSelector_Loaded" SelectedColorChanged="FillColor_Selector_SelectedColorChanged"/>
    </telerikRibbonBar:RadRibbonDropDownButton.DropDownContent>
</telerikRibbonBar:RadRibbonDropDownButton>

Through the UI, the user can add custom colors, then when the picker is selected, the loaded event binds as follows:

private void RadColorSelector_Loaded( object sender, RoutedEventArgs e )
 {
     RadColorSelector sel = sender as RadColorSelector;
     sel.NoColorText = "Transparent";
     sel.MainPaletteHeaderText = "Standard Colors";
     sel.StandardPaletteHeaderText = "Custom Colors";
     sel.MainPaletteColumnsCount = 10;
     GetStandardColors();            // populate HeaderColors & MainColors
     sel.HeaderPaletteItemsSource = HeaderColors;
     sel.MainPaletteItemsSource = MainColors;
     sel.StandardPaletteItemsSource = CustomColors;
     sel.UpdateLayout();
}

This all works fine, but after displaying the color picker once, If I add more custom colors through my UI, the picker still shows the old list of custom colors.  The new ones do not appear, even if I do an UpdateLayout.  How can I make the picker recognize newly added custom colors when displaying the picker multiple times?

Thanks,

Terry

[Kiril Stanoev]

Hello Terry,

Instead of using Collection<Color> you need to use ObservableCollection<Color> for your scenario to work. Please have a look at the attached project for further reference.

Greetings,
Kiril Stanoev
the Telerik team