tooltip doesn't display on selected combobox item.

[Ravi]

Hi There,

I have created a style which will display a textblock in place of content control and i have to display a tooltip when user mouseover on selected item. unfortunately i am unable to see the tool tip even thought i set it. please see the below template for RadCombobox.
Please let me know how i can do this.

<ControlTemplate x:Key="NonEditableComboBox" TargetType="telerikInput:RadComboBox">
      <Grid x:Name="VisualRoot">
          <VisualStateManager.VisualStateGroups>
              <VisualStateGroup x:Name="CommonStates">
                  <VisualState x:Name="Disabled">
                      <Storyboard>
                          <DoubleAnimationUsingKeyFrames Storyboard.TargetName="PART_DropDownButton" Storyboard.TargetProperty="Opacity">
                              <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value=".5" />
                          </DoubleAnimationUsingKeyFrames>
                      </Storyboard>
                  </VisualState>
                  <VisualState x:Name="Normal">
                  </VisualState>
                  <VisualState x:Name="MouseOver">
                      <Storyboard>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundBorder" Storyboard.TargetProperty="Background">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource HoverBackground}" />
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownIcon" Storyboard.TargetProperty="Foreground">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ButtonIconForeground_MouseOver}" />
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownIcon" Storyboard.TargetProperty="Background">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ButtonIconBackground_MouseOver}" />
                          </ObjectAnimationUsingKeyFrames>
                      </Storyboard>
                  </VisualState>
                  <VisualState x:Name="DropDownOpen">
                      <Storyboard>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundBorder" Storyboard.TargetProperty="Background">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource DropDownOpenBackground}" />
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownIcon" Storyboard.TargetProperty="Foreground">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ButtonIconForeground_Pressed}" />
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownIcon" Storyboard.TargetProperty="Background">
                              <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ButtonIconBackground_Pressed}" />
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="FocusBorder" Storyboard.TargetProperty="Visibility">
                              <DiscreteObjectKeyFrame KeyTime="0">
                                  <DiscreteObjectKeyFrame.Value>
                                      <Visibility>Collapsed</Visibility>
                                  </DiscreteObjectKeyFrame.Value>
                              </DiscreteObjectKeyFrame>
                          </ObjectAnimationUsingKeyFrames>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PopupFakeBorder"
                                  Storyboard.TargetProperty="Visibility">
                              <DiscreteObjectKeyFrame KeyTime="0">
                                  <DiscreteObjectKeyFrame.Value>
                                      <Visibility>Visible</Visibility>
                                  </DiscreteObjectKeyFrame.Value>
                              </DiscreteObjectKeyFrame>
                          </ObjectAnimationUsingKeyFrames>
                      </Storyboard>
                  </VisualState>
              </VisualStateGroup>
              <VisualStateGroup x:Name="FocusStates">
                  <VisualState x:Name="Focused">
                      <Storyboard>
                          <ObjectAnimationUsingKeyFrames Storyboard.TargetName="FocusBorder" Storyboard.TargetProperty="Visibility">
                              <DiscreteObjectKeyFrame KeyTime="0">
                                  <DiscreteObjectKeyFrame.Value>
                                      <Visibility>Visible</Visibility>
                                  </DiscreteObjectKeyFrame.Value>
                              </DiscreteObjectKeyFrame>
                          </ObjectAnimationUsingKeyFrames>
                      </Storyboard>
                  </VisualState>
                  <VisualState x:Name="Unfocused" />
              </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <Border x:Name="PopupFakeBorder" Visibility="Collapsed" BorderThickness="1,0,1,0" CornerRadius="5,5,0,0"
                  Grid.ColumnSpan="2" Background="{StaticResource PickerPopupBackground_fake}"
                  BorderBrush="{TemplateBinding BorderBrush}" />
          <Border IsHitTestVisible="False" Background="{TemplateBinding Background}" CornerRadius="5" />
          <telerik:RadToggleButton x:Name="PART_DropDownButton" Foreground="{TemplateBinding Foreground}" IsTabStop="False" Margin="0" Padding="0" ClickMode="Press">
              <telerik:RadToggleButton.Template>
                  <ControlTemplate TargetType="telerik:RadToggleButton">
                      <ContentPresenter />
                  </ControlTemplate>
              </telerik:RadToggleButton.Template>
              <Grid>
                  <Grid.ColumnDefinitions>
                      <ColumnDefinition Width="*" />
                      <ColumnDefinition Width="36" />
                  </Grid.ColumnDefinitions>
                  <Border x:Name="BackgroundBorder"
                          CornerRadius="{StaticResource SplitButton_SpanCornerRadius}"
                          Grid.ColumnSpan="2"
                          BorderBrush="{StaticResource Control_OuterBorderBrush}" BorderThickness="1" Background="{StaticResource DefaultBackground}" />
                  <ContentControl x:Name="DropDownIcon"
                                  Grid.Column="1"
                                  IsTabStop="False"
                                  Foreground="{StaticResource ButtonIconForeground_Normal}"
                                  Background="{StaticResource ButtonIconBackground_Normal}"
                                  Template="{StaticResource ArrowTemplateNonEditableCombobox}" />
                  <TextBlock x:Name="Content"
                             FontFamily="Segoe UI"
                             IsHitTestVisible="False"
                             Grid.Column="0"
                             Foreground="{TemplateBinding Foreground}"
                             HorizontalAlignment="Left"
                             Margin="{TemplateBinding Padding}"
                             VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                             Text="{TemplateBinding SelectionBoxItem}"
                             TextTrimming="CharacterEllipsis"
                            ToolTip="{TemplateBinding  SelectionBoxItem}">

                  </TextBlock>
                  <!--<ContentPresenter x:Name="Content"
                                    Grid.Column="0"
                                    Margin="{TemplateBinding Padding}"
                                    IsHitTestVisible="False"
                                    Content="{TemplateBinding SelectionBoxItem}"
                                    ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
                                    TextBlock.Foreground="Black"
                                    HorizontalAlignment="Left"
                                    VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />-->
                  <Border x:Name="FocusBorder"
                          BorderThickness="1"
                          Margin="1"
                          Visibility="Collapsed"
                          BorderBrush="{StaticResource Control_FocusBorderBrush}" Grid.ColumnSpan="2" CornerRadius="3" />
              </Grid>
          </telerik:RadToggleButton>
          <Popup x:Name="PART_Popup">
              <Grid x:Name="PopupRoot">
                  <Border BorderThickness="{TemplateBinding BorderThickness}" Margin="0,-10,0,0" Padding="0,10,0,0" BorderBrush="{TemplateBinding BorderBrush}" MinWidth="{TemplateBinding MinDropDownWidth}" MaxHeight="{TemplateBinding MaxDropDownHeight}" Background="{StaticResource PickerPopupBackground}" CornerRadius="0 0 5 5">
                      <Grid>
                          <Grid.RowDefinitions>
                              <RowDefinition Height="Auto" />
                              <RowDefinition Height="*" />
                          </Grid.RowDefinitions>
                          <telerik:RadButton x:Name="PART_ClearButton" Grid.Row="0" Margin="-1 -1 -1 0" Visibility="{TemplateBinding ClearSelectionButtonVisibility}" Content="{TemplateBinding ClearSelectionButtonContent}" />
                          <ScrollViewer x:Name="PART_ScrollViewer" Grid.Row="1" Foreground="{TemplateBinding Foreground}" Padding="0 1 0 0" BorderThickness="0" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
                              <ItemsPresenter />
                          </ScrollViewer>
                      </Grid>
                  </Border>
              </Grid>
          </Popup>
      </Grid>
  </ControlTemplate>

Regards,
Srinivas.

[Konstantina]

Hello,

You could set instead the ItemTemplate of RadComboBox:

<telerik:RadComboBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding DisplayText}">
                        <TextBlock.ToolTip>
                            <TextBlock Text="{Binding DisplayText}"/>
                        </TextBlock.ToolTip>
                    </TextBlock>
                </DataTemplate>
            </telerik:RadComboBox.ItemTemplate>

The DisplayText is the property to which the ComboBox is bound.
I guess that is easier than changing the whole template.

Could you please give it a try and let me know if that worked for you.

Regards,
Konstantina
Telerik

[Ravi]

Hi Konstantina,

Thanks for help, its working now.

Regards,
Srinivas.