Skip to Main Content
Programming WPF, 2nd Edition
book

Programming WPF, 2nd Edition

by Chris Sells, Ian Griffiths
August 2007
Intermediate to advanced content levelIntermediate to advanced
864 pages
25h 52m
English
O'Reilly Media, Inc.
Content preview from Programming WPF, 2nd Edition

ToolTip

The ToolTip control allows a floating label to be displayed above some part of the user interface. It is an unusual control in that it cannot be part of the normal user interface tree—you can use it only in conjunction with another element. It becomes visible only when the mouse pointer hovers over the target element, as Figure 5-14 shows.

TextBox with ToolTip

Figure 5-14. TextBox with ToolTip

To associate a ToolTip with its target element, you set it as the ToolTip property of its target, as shown in Example 5-11.

Example 5-11. Using ToolTip the long way

<TextBox Width="100">
  <TextBox.ToolTip>
    <ToolTip Content="Type something here" />
  </TextBox.ToolTip>
</TextBox>

In fact, you don't need to specify the ToolTip object explicitly. You can just set the ToolTip property to a string, as shown in Example 5-12.

Example 5-12. Using ToolTip the short way

<TextBox Width="100" ToolTip="Type something here" />

If you set the property to anything other than a ToolTip, WPF creates the ToolTip control for you, and sets its Content property to the value of the target element's ToolTip property. Example 5-11 and Example 5-12 are therefore equivalent.

ToolTip derives from ContentControl, so its content is not restricted to simple strings—we can put anything we like in there, as shown in Example 5-13.

Example 5-13. Exploiting the content model in a tool tip

<TextBox Width="100"> <TextBox.ToolTip> <TextBlock FontSize="25"> ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Programming C#, 4th Edition

Programming C#, 4th Edition

Jesse Liberty
Programming C# 10

Programming C# 10

Ian Griffiths

Publisher Resources

ISBN: 9780596510374Supplemental ContentErrata Page