How to get a group of toggle buttons to act like radio buttons in WPF?

Question

I have a group of buttons that should act like toggle buttons, but also as radio buttons where only one button can be selected / pressed down at a current time. It also need to have a state where none of the buttons are selected / pressed down.

The behavior will be kind of like Photoshop toolbar, where zero or one of the tools are selected at any time!

Any idea how this can be implemented in WPF?

Answer 1

you can put grid with radiobuttons in it, and create button like template for raduiobuttons. than just programmaticaly remove check if you don't want buttons to be toggled

Answer 2

You can also try System.Windows.Controls.Primitives.ToggleButton

 <ToggleButton Name="btnTest" VerticalAlignment="Top">Test</ToggleButton>

Then write code against the IsChecked property to mimick the radiobutton effect

 private void btnTest_Checked(object sender, RoutedEventArgs e)
 {
     btn2.IsChecked = false;
     btn3.IsChecked = false;
 }

Answer 3

The easiest way is to style a ListBox to use ToggleButtons for its ItemTemplate

<Style TargetType="{x:Type ListBox}">
    <Setter Property="ListBox.ItemTemplate">
        <Setter.Value>
            <DataTemplate>
                <ToggleButton Content="{Binding}" 
                              IsChecked="{Binding IsSelected, Mode=TwoWay, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBoxItem}}}"
                />
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>

Then you can use the SelectionMode property of the ListBox to handle SingleSelect vs MultiSelect.

Answer 4

Solution provided by Bryan Anderson works great but it's possible to have no buttons checked at all. Does anyone know how to solve this?

Answer 5

you could always use a generic event on the Click of the ToggleButton that sets all ToggleButton.IsChecked in a groupcontrol(Grid, WrapPanel, ...) to false with the help of the VisualTreeHelper; then re-check the sender. Or something in the likes of that.

private void ToggleButton_Click(object sender, RoutedEventArgs e)
    {
        int childAmount = VisualTreeHelper.GetChildrenCount((sender as ToggleButton).Parent);

        ToggleButton tb;
        for (int i = 0; i < childAmount; i++)
        {
            tb = null;
            tb = VisualTreeHelper.GetChild((sender as ToggleButton).Parent, i) as ToggleButton;

            if (tb != null)
                tb.IsChecked = false;
        }

        (sender as ToggleButton).IsChecked = true;
    }