RadWindow resizing to content

[Erin]

I would like a side panel to expand the window size like the behaviour in this code:

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" SizeToContent="WidthAndHeight">
    <DockPanel Height="300">
        <CheckBox x:Name="checkbox" Width="200" IsChecked="True" />
        <Grid Width="200" Background="Blue">
            <Grid.Style>
                <Style TargetType="{x:Type Grid}">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ElementName=checkbox, Path=IsChecked}" Value="True">
                            <Setter Property="Visibility" Value="Visible" />
                        </DataTrigger>
                        <DataTrigger Binding="{Binding ElementName=checkbox, Path=IsChecked}" Value="False">
                            <Setter Property="Visibility" Value="Collapsed" />
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Grid.Style>
        </Grid>
    </DockPanel>
</Window>

The RadWindow does not seem to resize itself, even when setting SizeToContent="True". Is it possible to do this with RadWindow?

[Kalin]

Hi Erin,

We are already aware of such issues with the SizeToContent behavior of RadWindow. We have a logged item in our Feedback portal for a similar scenario which you can track (we will definitely consider your scenario as well):
http://feedback.telerik.com/Project/143/Feedback/Details/130576-sizetocontent-stops-working-when-expander-is-expanded

However what I can suggest you as work around for this scenario would be to hook to the Checked/Unchecked events of the CheckBox and using a single handler to manually set the size of the Window to be equal to the actual Size of the DockPanel:

<DockPanel Height="300" x:Name="DockPanel">
    <CheckBox x:Name="checkbox" Width="200" IsChecked="True" Checked="checkbox_Checked" Unchecked="checkbox_Checked" />
    ...
</DockPanel>

And code behind:

private void checkbox_Checked(object sender, RoutedEventArgs e)
{
    if (this.DockPanel.ActualWidth != 0 && this.DockPanel.ActualHeight != 0)
    {
        this.Width = this.DockPanel.ActualWidth;
        this.Height = this.DockPanel.ActualHeight;
    }
}

I'm sorry for any inconvenience caused. If you have any other issues or concerns, please do not hesitate to contact us.

Regards,
Kalin
Telerik