<TextBlock Width="100" Text="The quick brown fox jumps over the lazy dog" TextTrimming="WordEllipsis">
<TextBlock.ToolTip>
<ToolTip DataContext="{Binding Path=PlacementTarget, RelativeSource={x:Static RelativeSource.Self}}">
<TextBlock Text="{Binding Text}"/>
</ToolTip>
</TextBlock.ToolTip>
</TextBlock>
How can I show the ToolTip only when the text is trimmed? Like the windows desktp shortcut icons.
I used this from @pogosoma but with the CalculateIsTextTrimmed function from @snicker which is perfect
private static void SetTooltipBasedOnTrimmingState(TextBlock tb)
{
Typeface typeface = new Typeface(tb.FontFamily, tb.FontStyle, tb.FontWeight, tb.FontStretch);
FormattedText formattedText = new FormattedText(tb.Text, System.Threading.Thread.CurrentThread.CurrentCulture, tb.FlowDirection, typeface, tb.FontSize, tb.Foreground)
{ MaxTextWidth = tb.ActualWidth };
bool isTextTrimmed = (formattedText.Height > tb.ActualHeight || formattedText.MinWidth > formattedText.MaxTextWidth);
ToolTipService.SetToolTip(tb, isTextTrimmed ? tb.ToolTip : null);
}