Trigger on MouseHover?

I was wondering if there was a way to setup a trigger on MouseHover, not MouseOver.

I would like an action to occur when the user keeps their开发者_如何学JAVA mouse over a specified area for X seconds instead of when they just MouseOver it in passing.

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To make the IsMouseOver trigger begin after X seconds, you should be able to use a Storybard and set the BeginTime Property. Here's an example for a Button which increases its size by 50% when the mouse is hovering it for 2 seconds.
To skip the animation part you can set Duration="0" for the DoubleAnimations

<Button Content="Button"
        Height="23"
        Width="75"
        RenderTransformOrigin="0.5 0.5">
    <Button.RenderTransform>
        <ScaleTransform />
    </Button.RenderTransform>
    <Button.Style>
        <Style TargetType="Button">
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Trigger.EnterActions>
                        <BeginStoryboard>
                            <Storyboard BeginTime="00:00:02">
                                <DoubleAnimation Storyboard.TargetProperty="(Button.RenderTransform).(ScaleTransform.ScaleX)" To="1.5"/>
                                <DoubleAnimation Storyboard.TargetProperty="(Button.RenderTransform).(ScaleTransform.ScaleY)" To="1.5"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </Trigger.EnterActions>
                    <Trigger.ExitActions>
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation Storyboard.TargetProperty="(Button.RenderTransform).(ScaleTransform.ScaleX)" To="1.0"/>
                                <DoubleAnimation Storyboard.TargetProperty="(Button.RenderTransform).(ScaleTransform.ScaleY)" To="1.0"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </Trigger.ExitActions>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>