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POHow to databind the tooltip to part of a user control?
 

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  1. POHow to databind the tooltip to part of a user control?
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    <p>I know this question has been asked many times before, I have found a few solutions here on line, but I could not make any of them work. I have a few elements on a custom control I have, and I want to put a bound tool tip on one of them. This is what I have so far.</p> <pre><code>&lt;UserControl x:Class="DirectGraphicsControl.ColorBarView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:DirectGraphicsControl="clr-namespace:Windows.DirectGraphicsControl" mc:Ignorable="d" SizeChanged="UserControlSizeChanged" MinWidth="95"&gt; &lt;DockPanel LastChildFill="True" Width="80" x:Name="_mainDockPanel"&gt; &lt;TextBlock DockPanel.Dock="Top" x:Name="_title" x:FieldModifier="public" HorizontalAlignment="Center" Margin="0,2,0,2"/&gt; &lt;StackPanel Orientation="Vertical" DockPanel.Dock="Bottom" Margin="0,2,0,2" x:Name="_bottomLabelsRegion" x:FieldModifier="public"&gt; &lt;TextBlock x:Name="_unitName" x:FieldModifier="public" HorizontalAlignment="Center" VerticalAlignment="Bottom"/&gt; &lt;/StackPanel&gt; &lt;Grid DataContext="{Binding ElementName=_mainDockPanel.Parent, Path=MyTooltip}" &gt; &lt;DirectGraphicsControl:DirectGraphicsControl x:Name="_directGraphicsControl" MouseDoubleClick="HandleColorBarMouseDoubleClick" x:FieldModifier="public"&gt; &lt;DirectGraphicsControl:DirectGraphicsControl.ToolTip&gt; &lt;ToolTip Content="{Binding Path=PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}"/&gt; &lt;/DirectGraphicsControl:DirectGraphicsControl.ToolTip&gt; &lt;/DirectGraphicsControl:DirectGraphicsControl&gt; &lt;/Grid&gt; &lt;/DockPanel&gt; </code></pre> <p></p> <p>and this is the code behind.</p> <pre><code>/// &lt;summary&gt; /// The tool tip text /// &lt;/summary&gt; public static readonly DependencyProperty TooltipProperty = DependencyProperty.Register(Reflection.GetPropertyName&lt;ColorBarView&gt;(m =&gt; m.MyTooltip), typeof(string), typeof(ColorBarView)); /// &lt;summary&gt; /// The tool tip text /// &lt;/summary&gt; public string MyTooltip { get { return "Test from binding"; } } </code></pre> <p>The code behind property is only returning a hard coded string for now until I can actually get it working and then it will return the calculated value I would like it to. Currently on mouse over an empty box appears. When I add the text for the tooltip straight to the xaml it shows fine. This makes me think it cannot find the location of the binding.</p> <p>I am very new to wpf so any suggestions would be great.</p> <p>Thank you,</p>
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