#663 – How IsMouseOver Works for Nested Elements

The IsMouseOver property for a user interface element indicates whether the mouse is currently over the element.

When an element is contained within another element in the logical tree, then IsMouseOver will be true for both the lower-level element and for any elements higher up in the logical tree.

Suppose that we have a Button in a StackPanel which is inside a Window.

<Window Name="win1">
    <StackPanel Name="sp1" Background="Pink" Margin="20,0">
        <Button Name="btn1" Content="Click Me" HorizontalAlignment="Center" Padding="10,5"/>
    </StackPanel>
</Window>

If the mouse is in the application’s Window, but outside of the StackPanelIsMouseOver will be true only for the Window.

If we move the mouse into the StackPanel, but not over the ButtonIsMouseOver will be true for both the StackPanel and the Window.

Finally, moving the mouse over the Button results in IsMouseOver being true for all three elements.

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #663 – How IsMouseOver Works for Nested Elements

  1. Pingback: #667 – IsMouseOver vs. IsMouseDirectlyOver « 2,000 Things You Should Know About WPF

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: