WPF Discussion Boards

Kevin Marois26-Jan-13 15:39

26-Jan-13 15:39

I'm stuck here guys. I could really use another pair of eyes on this.

I have a treeview. It's bound to an ObservableCollection<treenode> called Nodes. The bound data on the tool tips is not showing:

<controls:TreeViewEx BorderThickness="0"
                        ItemsSource="{Binding Nodes}"
                        SelectedItemEx="{Binding SelectedTreeNode, Mode=TwoWay}">

        <controls:TreeViewEx.ToolTip>

            <Grid>
                            
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                            
                <Image Grid.Row="0"
                        Grid.Column="0" 
                        Source="/FMG.UI.WPF;component/Media/Images/job_128.png"
                        Height="16"
                        Width="16"/>

                <TextBox Grid.Row="0"
                            Grid.Column="1"
                            Text="Job: "
                            FontWeight="Bold"/>

                <TextBox Grid.Row="0"
                            Grid.Column="2"
                            Text="{Binding ToolTipHeader}"/>

                <Border Grid.Row="1"
                        Grid.Column="0"
                        Grid.ColumnSpan="3"
                        Height="2"
                        BorderBrush="Gray"/>

                <TextBox Grid.Row="2"
                            Grid.Column="0"
                            Grid.ColumnSpan="3"
                            Text="{Binding ToolTipDetails}"/>

            </Grid>
                        
        </controls:TreeViewEx.ToolTip>

</controls:TreeViewEx>

The tooltip pops up, but the ToolTipHeader and and ToolTipDetails are blank. The Output window says it can't find them on the view model. How do I make the binding look on the Node, not the view model?

Thanks

If it's not broken, fix it until it is

modified 28-Jan-13 23:04pm.

Re: Problem With TreeViewItem Tooltip

Thomas Duwe29-Jan-13 1:46

Thomas Duwe

29-Jan-13 1:46

Hi Kevin,

what is the DataContext of the ToolTip?
Because the bindings look at e.g. DataContext.ToolTipHeader.

Have a look at what Karl Shifflett did here: http://karlshifflett.wordpress.com/2007/12/29/wpf-sample-series-data-binding-in-tooltip/[^]

If you change <controls:TreeViewEx.ToolTip> to:

#text

<controls:TreeViewEx.ToolTip>
  <ToolTip DataContext="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Self}}">
    <Grid></Grid>
  </ToolTip>
</controls:TreeViewEx.ToolTip>

And change the binding of the textbox to e.g. Text="{Binding SelectedItemEx.ToolTipHeader}"
then it should work, if SelectedItemEx has the property ToolTipHeader.

But you realize that you define a tooltip for the whole treeview control and not for each treeview node, right?

Of course, if the tooltip has already as datacontext your viewmodel then Text="{Binding SelectedTreeNode.ToolTipHeader}"
should work too (without setting the ToolTip DatContext=...) stuff.

Bye,

Thomas.

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