WPF toolbar - why one button is showing ToolTip but not the other? - wpf

Question

In my WPF app, the following XAML in Toolbar is showing ToolTip for Paste button but not for the Copy button. Question: Why it may be happening and how can we resolve it?
<Window x:Class="myWPFApp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfMkTxTest"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="1140.038">
<Grid>
<!-- Set the styles for the tool bar. -->
<Grid.Resources>
<Style TargetType="{x:Type Button}" x:Key="formatTextStyle">
<Setter Property="FontFamily" Value="Palatino Linotype"></Setter>
<Setter Property="Width" Value="30"></Setter>
<Setter Property="FontSize" Value ="14"></Setter>
<Setter Property="CommandTarget" Value="{Binding ElementName=mainRTB}"></Setter>
</Style>
<Style TargetType="{x:Type Button}" x:Key="formatImageStyle">
<Setter Property="Width" Value="30"></Setter>
<Setter Property="CommandTarget" Value="{Binding ElementName=mainRTB}"></Setter>
</Style>
<Style TargetType="{x:Type RichTextBox}">
<Setter Property="FontFamily" Value="calibri (body)" />
<Setter Property="FontSize" Value="11" />
</Style>
<Style TargetType="{x:Type Paragraph}">
<Setter Property="Margin" Value="0" />
</Style>
</Grid.Resources>
<DockPanel Name="mainPanel">
<!-- This tool bar contains all the editing buttons. -->
<ToolBar Name="mainToolBar" Height="30" DockPanel.Dock="Top">
....
<Button Style="{StaticResource formatImageStyle}" Command="ApplicationCommands.Copy" ToolTip="Copy">
<Image Source="Images\editcopy.png"></Image>
</Button>
<Button Style="{StaticResource formatImageStyle}" Command="ApplicationCommands.Paste" ToolTip="Paste">
<Image Source="Images\editpaste.png"></Image>
</Button>
....
</DockPanel>
</Grid>
</Window>

Answer 1

To show tooltip for command binding buttons, set ToolTipService.ShowOnDisabled = "True"
<DockPanel Name="mainPanel" VerticalAlignment="Top">
<ToolBar Name="mainToolBar" Height="30" DockPanel.Dock="Top">
<Button Style="{StaticResource formatImageStyle}" Command="ApplicationCommands.Copy" ToolTip="Copy" ToolTipService.ShowOnDisabled="True">
<Image Source="C:\Users\mcpl\Documents\Visual Studio 2015\Projects\TestApplication\TestApplication\Images\Add.png"></Image>
</Button>
<Button Style="{StaticResource formatImageStyle}" Command="ApplicationCommands.Paste" ToolTip="Paste" ToolTipService.ShowOnDisabled="True">
<Image Source="C:\Users\mcpl\Documents\Visual Studio 2015\Projects\TestApplication\TestApplication\Images\edit.png"></Image>
</Button>
</ToolBar>

Answer 2

Try using CommandBinding
<ToolBar Name="mainToolBar" Height="30" DockPanel.Dock="Top">
<Button Style="{StaticResource formatImageStyle}" ToolTip="Copy">
<Button.CommandBindings>
<CommandBinding Command="ApplicationCommands.Copy" />
</Button.CommandBindings>
<Image Source="C:\Users\heruvath\Desktop\user-48.png"></Image>
</Button>
<Button Style="{StaticResource formatImageStyle}" ToolTip="Paste">
<Button.CommandBindings>
<CommandBinding Command="ApplicationCommands.Paste" />
</Button.CommandBindings>
<Image Source="C:\Users\heruvath\Desktop\user-48.png"></Image>
</Button>
</ToolBar>