Templated Combobox Tooltips from Items

[=?Utf-8?B?V29ua28gdGhlIFNhbmU=?=]

Hello,

I have a ComboBox with a style that sets its Template and ItemTemplate. I'd
like to set the tooltip of the combo to the tooltip of the currently selected
item, but I am having trouble doing so.

I've used Marco Zhou's solution in the thread
http://social.msdn.microsoft.com/For...-0243162266ef/ as a starting point, but have not had any success yet.

Thanks,
WtS

[Zhi-Xin Ye [MSFT]]

Hi Wts,

You can use a converter to display the tooltip of the current selected item
on the tooltip of the ComboBox. I write the following sample based on
Macro Zhou's for your information.

[C# Code]

namespace WpfApplication4
{
public partial class Window1 : Window
{
public Window1()
{
InitializeCompo nent();
}
}

[ValueConversion (typeof(object) , typeof(String))]
public class MyToolTipConver ter : IValueConverter
{
public object Convert(object value, Type targetType, object
parameter, CultureInfo culture)
{
ComboBoxItem selectedItem = (ComboBoxItem)v alue;
//Return the tooltip of the current selected item;
return selectedItem.To olTip;
}

public object ConvertBack(obj ect value, Type targetType, object
parameter, CultureInfo culture)
{
return value;
}
}
}
[XAML code]

<Window x:Class="WpfApp lication4.Windo w1"
xmlns="http://schemas.microso ft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microso ft.com/winfx/2006/xaml"
xmlns:local="cl r-namespace:WpfAp plication4"
Title="Window1" Height="300" Width="300">

<Window.Resourc es>
<local:MyToolTi pConverter x:Key="myToolti pConverter"/>
</Window.Resource s>

<DockPanel>

<ComboBox x:Name="combo" SelectedIndex=" 0" DockPanel.Dock= "Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstI tem">one</ComboBoxItem>
<ComboBoxItem ToolTip="Second Item">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdI tem">three</ComboBoxItem>
<ComboBox.ToolT ip>
<ToolTip DataContext="{B inding Path=PlacementT arget,
RelativeSource= {RelativeSource Self}}">
<TextBlock Text="{Binding Path=SelectedIt em,
Converter={Stat icResource myTooltipConver ter}}" Foreground="Gre en"/>
</ToolTip>
</ComboBox.ToolTi p>
</ComboBox>
</DockPanel>

</Window>
If any part of the sample code is unclear, please feel free to let me know.

Sincerely,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
ms****@microsof t.com.

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[=?Utf-8?B?V29ua28gdGhlIFNhbmU=?=]

Hi Zhi-Xin,

Thanks, but what I'd really like (if possible) is a way to get the tooltip
of the selected item within a ControlTemplate , without having to write a
converter for each use of this style.

I have something like this (parts snipped for brevity):
<ControlTemplat e x:Key="pulldown Template" TargetType="{x: Type ComboBox}">
<Border Style="{Dynamic Resource NormalButtonBor der}">
<Grid>
<ToggleButton Name="ToggleBut ton" />
<ContentPresent er
Name="ContentSi te"
IsHitTestVisibl e="False"
Content="{Templ ateBinding SelectionBoxIte m}"
ContentTemplate ="{TemplateBind ing
SelectionBoxIte mTemplate}"
ContentTemplate Selector="{Temp lateBinding
ItemTemplateSel ector}"
Margin="3"
VerticalAlignme nt="{TemplateBi nding
VerticalContent Alignment}"
HorizontalAlign ment="{Template Binding
HorizontalConte ntAlignment}">
<ContentPresent er.ToolTip>
<!-- I would assume something goes here -->
</ContentPresente r.ToolTip>
</ContentPresente r>
<Popup Name="Popup" />
</Grid>
</Border>
</ControlTemplate >
Thanks,
Wts

"Zhi-Xin Ye [MSFT]" wrote:

Hi Wts,

You can use a converter to display the tooltip of the current selected item
on the tooltip of the ComboBox. I write the following sample based on
Macro Zhou's for your information.

[C# Code]

namespace WpfApplication4
{
public partial class Window1 : Window
{
public Window1()
{
InitializeCompo nent();
}
}

[ValueConversion (typeof(object) , typeof(String))]
public class MyToolTipConver ter : IValueConverter
{
public object Convert(object value, Type targetType, object
parameter, CultureInfo culture)
{
ComboBoxItem selectedItem = (ComboBoxItem)v alue;
//Return the tooltip of the current selected item;
return selectedItem.To olTip;
}

public object ConvertBack(obj ect value, Type targetType, object
parameter, CultureInfo culture)
{
return value;
}
}
}
[XAML code]

<Window x:Class="WpfApp lication4.Windo w1"
xmlns="http://schemas.microso ft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microso ft.com/winfx/2006/xaml"
xmlns:local="cl r-namespace:WpfAp plication4"
Title="Window1" Height="300" Width="300">

<Window.Resourc es>
<local:MyToolTi pConverter x:Key="myToolti pConverter"/>
</Window.Resource s>

<DockPanel>

<ComboBox x:Name="combo" SelectedIndex=" 0" DockPanel.Dock= "Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstI tem">one</ComboBoxItem>
<ComboBoxItem ToolTip="Second Item">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdI tem">three</ComboBoxItem>
<ComboBox.ToolT ip>
<ToolTip DataContext="{B inding Path=PlacementT arget,
RelativeSource= {RelativeSource Self}}">
<TextBlock Text="{Binding Path=SelectedIt em,
Converter={Stat icResource myTooltipConver ter}}" Foreground="Gre en"/>
</ToolTip>
</ComboBox.ToolTi p>
</ComboBox>
</DockPanel>

</Window>
If any part of the sample code is unclear, please feel free to let me know.

Sincerely,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
ms****@microsof t.com.

=============== =============== =============== =====
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/en-us/subs...#notifications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://support.microsoft.com/select/...tance&ln=en-us.
=============== =============== =============== =====
This posting is provided "AS IS" with no warranties, and confers no rights.

[Zhi-Xin Ye [MSFT]]

Hi Wts,

You can use a converter in the template as well. For example:

[XAML code]

<Window x:Class="WpfApp lication4.Windo w1"
xmlns="http://schemas.microso ft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microso ft.com/winfx/2006/xaml"
xmlns:local="cl r-namespace:WpfAp plication4"
Title="Window1" Height="300" Width="300">

<Window.Resourc es>
<local:MyToolTi pConverter x:Key="myToolti pConverter"/>

<Style TargetType="Com boBox">
<Setter Property="Templ ate">
<Setter.Value >
<ControlTemplat e TargetType="{x: Type ComboBox}">
<Border BorderBrush="Re d" BorderThickness ="3">
<Grid>
<ToggleButton Name="ToggleBut ton" />
<ContentPresent er Content="{Templ ateBinding
SelectionBoxIte m}">
<ContentPresent er.ToolTip>
<TextBlock Margin="0,0,100 ,50"
x:Name="textBlo ck"
Text="{Template Binding
SelectedItem, Converter={Stat icResource myTooltipConver ter}}"/>
</ContentPresente r.ToolTip>
</ContentPresente r>
</Grid>
</Border>
</ControlTemplate >
</Setter.Value>
</Setter>
</Style>

</Window.Resource s>

<DockPanel>

<ComboBox x:Name="combo2" SelectedIndex=" 0" DockPanel.Dock= "Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstI tem">one</ComboBoxItem>
<ComboBoxItem ToolTip="Second Item">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdI tem">three</ComboBoxItem>
</ComboBox>

</DockPanel>

</Window>

=============== =============== =====

[C# code]

namespace WpfApplication4
{
public partial class Window1 : Window
{
public Window1()
{
InitializeCompo nent();
}
}

[ValueConversion (typeof(object) , typeof(String))]
public class MyToolTipConver ter : IValueConverter
{
public object Convert(object value, Type targetType, object
parameter, CultureInfo culture)
{
ComboBoxItem selectedItem = (ComboBoxItem)v alue;
return selectedItem.To olTip;
}

public object ConvertBack(obj ect value, Type targetType, object
parameter, CultureInfo culture)
{
return value;
}
}
}

Should you have any question, please don't hesitate to let me know.

Sincerely,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
ms****@microsof t.com.

This posting is provided "AS IS" with no warranties, and confers no rights.