Question

I would like to set ToolTip maxwidth property to show long texts properly. In addition I need text wrapping. I used this style:

<Style TargetType="ToolTip">
        <Setter Property="ContentTemplate">
            <Setter.Value>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding}"  MaxWidth="400" TextWrapping='Wrap' />
                    </StackPanel>
                </DataTemplate>
            </Setter.Value>
        </Setter>
</Style>

This tooltip style is OK for my purpose. However, it is not effective for some controls which has own tooltip style. For example, tooltip of following button can not appear.

<Button>
    <Button.ToolTip>
        <StackPanel>
            <TextBlock Style="{StaticResource firstText}" Text="aaaaaaaaaaaaa"/>
            <TextBlock Style="{StaticResource secondText}" Text="bbbbbbbbbbbbb"/>    
            <TextBlock Bacground="Red" Text="ccccccccccccc"/>    
        </StackPanel>
    </Button.ToolTip>
</Button>

I want to set maxwidth property with text wrapping for all tooltips. What can i do for this issue?

Answer 1

Following style of ToolTip is useful for me:

<Style TargetType="ToolTip" x:Key="InternalToolTipStyle">
    <Setter Property="MaxWidth" Value="{Binding Path=(lib:ToolTipProperties.MaxWidth)}" />
    <Setter Property="ContentTemplate">
        <Setter.Value>
            <DataTemplate>
                <ContentPresenter Content="{TemplateBinding Content}"  >
                    <ContentPresenter.Resources>
                        <Style TargetType="{x:Type TextBlock}">
                            <Setter Property="TextWrapping" Value="Wrap" />
                        </Style>
                    </ContentPresenter.Resources>
                </ContentPresenter>
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>

With this style, tooltip of following button appears properly:

<Button>
<Button.ToolTip>
    <StackPanel>
        <TextBlock Style="{StaticResource firstText}" Text="aaaaaaaaaaaaa"/>
        <TextBlock Style="{StaticResource secondText}" Text="bbbbbbbbbbbbb"/>    
        <TextBlock Bacground="Red" Text="ccccccccccccc"/>    
    </StackPanel>
</Button.ToolTip>