[WPF] DataGrid: the tooltips on Path are not alwat visibile

Question

Hi,

I have this two columns, the first is created for test, the second is the definitive column.

The first:

<DataGridTextColumn Binding="{Binding Note, Mode=OneWay}" Header="Note" CanUserSort="True">

<DataGridTextColumn.CellStyle>

<Style TargetType="DataGridCell">

<Setter Property="ToolTip" Value="{Binding Note}" />

</Style>

</DataGridTextColumn.CellStyle>

</DataGridTextColumn>

The second:

<DataGridTemplateColumn SortMemberPath="Note">

<DataGridTemplateColumn.HeaderTemplate>

<DataTemplate>

<Path

Data="{StaticResource IconNote}"

Style="{StaticResource smplMngmntIconHeader}"

>

<Path.ToolTip>

<TextBlock>

<Run Text="{StaticResource tooltTipHeaderNote}"/>

</TextBlock>

</Path.ToolTip>

</Path>

</DataTemplate>

</DataGridTemplateColumn.HeaderTemplate>

<DataGridTemplateColumn.CellTemplate>

<DataTemplate>

<Path

Data="{StaticResource IconNote}"

Visibility="{Binding Note, Converter={StaticResource smplMngmntIconDataGridVisibility}}"

Style="{StaticResource smplMngmntIconDataGrid}"

>

<Path.ToolTip>

<TextBlock Text="{Binding Note, Converter={StaticResource SampleBlendingFormatString}}"/>

</Path.ToolTip>

</Path>

</DataTemplate>

</DataGridTemplateColumn.CellTemplate>

</DataGridTemplateColumn>

The tooltip on first column is shown always, without problem.

In the second column i created a convert for show or hide the icon, but the tooltip for some icon is shown for others no.

Why?

Thanks.