Modify part of a theme

[Ari]

I would like to modify the GridViewHeaderCellTemplate in such a way that it applies to all themes.
I would like to define the ControlTemplate only, and have the styles inherited from whatever theme happens to be loaded.

Is this possible?

[Kalin Milanov]

Hello Ari,

What I would do in your case is use the Header property of the column and insert my custom layout. This way the themes will continue to apply automatically.

Try it out and let me know how it goes.

All the best,
Kalin Milanov
the Telerik team

[Ari]

Thank you for your reply.
But how do I reference resources from the theme in a generic way?

For example, I would like to continue to use the GridView_HeaderBackground style, yet it should inherit it from the current theme.

Is this possible?

[Kalin Milanov]

Hello Ari,

Let's say you want to place a grid with 2 rows and 2 columns in the header and you want to have some text and buttons and maybe a combo in it as well. Using the header property of the column you do the following:

<telerik:GridViewDataColumn.Header>
        <Grid Margin="0,3">
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>
        <TextBlock Text="Text1" VerticalAlignment="Center" />
        <TextBlock Text="Text2" Grid.Row="1" VerticalAlignment="Center" />
        <telerik:RadButton Content="Button1" Grid.Column="1" Margin="0,1" />
        <telerik:RadComboBox Grid.Column="1" Grid.Row="1" SelectedIndex="1" Margin="0,1">
            <telerik:RadComboBoxItem Content="Item1" />
            <telerik:RadComboBoxItem Content="Item2" />
            <telerik:RadComboBoxItem Content="Item3" />
            <telerik:RadComboBoxItem Content="Item4" />
            <telerik:RadComboBoxItem Content="Item5" />
            <telerik:RadComboBoxItem Content="Item6" />
            <telerik:RadComboBoxItem Content="Item7" />
            <telerik:RadComboBoxItem Content="Item8" />
        </telerik:RadComboBox>
    </Grid>
</telerik:GridViewDataColumn.Header>

This way you will both have your logic and layout AND keep the themes.

Sincerely yours,
Kalin Milanov
the Telerik team