Templated Combobox Tooltips from Items

  • Thread starter Thread starter Wonko the Sane
  • Start date Start date
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()
{
InitializeComponent();
}
}

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

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


[XAML code]

<Window x:Class="WpfApplication4.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication4"
Title="Window1" Height="300" Width="300">

<Window.Resources>
<local:MyToolTipConverter x:Key="myTooltipConverter"/>
</Window.Resources>

<DockPanel>

<ComboBox x:Name="combo" SelectedIndex="0" DockPanel.Dock="Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstItem">one</ComboBoxItem>
<ComboBoxItem ToolTip="SecondItem">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdItem">three</ComboBoxItem>
<ComboBox.ToolTip>
<ToolTip DataContext="{Binding Path=PlacementTarget,
RelativeSource={RelativeSource Self}}">
<TextBlock Text="{Binding Path=SelectedItem,
Converter={StaticResource myTooltipConverter}}" Foreground="Green"/>
</ToolTip>
</ComboBox.ToolTip>
</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:
(e-mail address removed).

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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/default.aspx?target=assistance&ln=en-us.
==================================================
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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):
<ControlTemplate x:Key="pulldownTemplate" TargetType="{x:Type ComboBox}">
<Border Style="{DynamicResource NormalButtonBorder}">
<Grid>
<ToggleButton Name="ToggleButton" />
<ContentPresenter
Name="ContentSite"
IsHitTestVisible="False"
Content="{TemplateBinding SelectionBoxItem}"
ContentTemplate="{TemplateBinding
SelectionBoxItemTemplate}"
ContentTemplateSelector="{TemplateBinding
ItemTemplateSelector}"
Margin="3"
VerticalAlignment="{TemplateBinding
VerticalContentAlignment}"
HorizontalAlignment="{TemplateBinding
HorizontalContentAlignment}">
<ContentPresenter.ToolTip>
<!-- I would assume something goes here -->
</ContentPresenter.ToolTip>
</ContentPresenter>
<Popup Name="Popup" />
</Grid>
</Border>
</ControlTemplate>


Thanks,
Wts

Zhi-Xin Ye said:
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()
{
InitializeComponent();
}
}

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

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


[XAML code]

<Window x:Class="WpfApplication4.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication4"
Title="Window1" Height="300" Width="300">

<Window.Resources>
<local:MyToolTipConverter x:Key="myTooltipConverter"/>
</Window.Resources>

<DockPanel>

<ComboBox x:Name="combo" SelectedIndex="0" DockPanel.Dock="Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstItem">one</ComboBoxItem>
<ComboBoxItem ToolTip="SecondItem">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdItem">three</ComboBoxItem>
<ComboBox.ToolTip>
<ToolTip DataContext="{Binding Path=PlacementTarget,
RelativeSource={RelativeSource Self}}">
<TextBlock Text="{Binding Path=SelectedItem,
Converter={StaticResource myTooltipConverter}}" Foreground="Green"/>
</ToolTip>
</ComboBox.ToolTip>
</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:
(e-mail address removed).

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#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/default.aspx?target=assistance&ln=en-us.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.
Click to expand...
 
Hi Wts,

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

[XAML code]

<Window x:Class="WpfApplication4.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication4"
Title="Window1" Height="300" Width="300">

<Window.Resources>
<local:MyToolTipConverter x:Key="myTooltipConverter"/>

<Style TargetType="ComboBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBox}">
<Border BorderBrush="Red" BorderThickness="3">
<Grid>
<ToggleButton Name="ToggleButton" />
<ContentPresenter Content="{TemplateBinding
SelectionBoxItem}">
<ContentPresenter.ToolTip>
<TextBlock Margin="0,0,100,50"
x:Name="textBlock"
Text="{TemplateBinding
SelectedItem, Converter={StaticResource myTooltipConverter}}"/>
</ContentPresenter.ToolTip>
</ContentPresenter>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

</Window.Resources>

<DockPanel>

<ComboBox x:Name="combo2" SelectedIndex="0" DockPanel.Dock="Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstItem">one</ComboBoxItem>
<ComboBoxItem ToolTip="SecondItem">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdItem">three</ComboBoxItem>
</ComboBox>

</DockPanel>

</Window>

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

[C# code]

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

[ValueConversion(typeof(object), typeof(String))]
public class MyToolTipConverter : IValueConverter
{
public object Convert(object value, Type targetType, object
parameter, CultureInfo culture)
{
ComboBoxItem selectedItem = (ComboBoxItem)value;
return selectedItem.ToolTip;
}

public object ConvertBack(object 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:
(e-mail address removed).

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