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

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>

score 1 · Answer 1 · answered May 08 '19 at 07:59

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>

Although your suggestion works I was curious as to why the `ToolTip` works for `Paste` button without setting `ShowOnDisabled` property to true but it does not work for the `Copy` button? I thought that the above property would be needed if a button is disabled and you still want to show the `ToolTip` as explained [here](https://stackoverflow.com/a/3149135/1232087), as well. My `Copy` button is not disabled as it's copy functionality works fine when I click on it to copy a text. — nam, May 08 '19 at 15:31

score 0 · Answer 2 · answered May 08 '19 at 02:56

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>

Thank you for trying to help. Your suggestion did not make any difference at all. I think what you're suggesting is for built-in Edit commands for Copy/Cut/Paste etc so one does NOT need to specifically write a code for them. I'm not sure if it has anything to do with ToolTip. — nam, May 08 '19 at 16:27

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

2 Answers2