Conditional Tooltip Based On Checkbox WPF

Question

I've got a checkbox and a button in my WPF MVVM app. If the checkbox is checked I want a tooltip on the button that says "x" and if it's unchecked the tooltip should say "y".

Anyone know the best way to do this? I think it could be done with a separate property in my view model, but maybe there's an easier way to do this in just the xaml?

Thanks in advance.

Answer 1

You could use a Style with a DataTrigger that binds to the IsChecked property of the CheckBox:

<CheckBox x:Name="chk" Content="CheckBox" />
<Button Content="Button">
    <Button.Style>
        <Style TargetType="Button">
            <Setter Property="ToolTip" Value="y" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsChecked, ElementName=chk}" Value="True">
                    <Setter Property="ToolTip" Value="x" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>