CODEWITHSUNDEEP
wpf
Ianb
Ianb

Reputation: 532

How to make WPF scrollviewer smoother

I'm using a scrollviewer like this:

<ScrollViewer PanningMode="Both" >
    <TextBlock FontSize="15" TextWrapping="Wrap">         
       (a block of random text)
    </TextBlock>
</ScrollViewer>

I am using a very decent new laptop with a touchscreen but if I flick the text, the movement is not nice, it is jerky. If I use any windows 8 apps with touching / flicking etc the movement is silky smooth.

Is this an issue with WPF? Is there any way to get smooth scrolling?

Thanks

Upvotes: 0

Views: 1704

Answers (1)

Gusdor
Gusdor

Reputation: 14334

Ensure that ScrollViewer.CanContentScroll is set to false.

<ScrollViewer PanningMode="Both" CanContentScroll=false>
    <TextBlock FontSize="15" TextWrapping="Wrap">         
       (a block of random text)
    </TextBlock>
</ScrollViewer>

Physical vs. Logical Scrolling

Physical scrolling is used to scroll content by a predetermined physical increment, typically by a value that is declared in pixels. Logical scrolling is used to scroll to the next item in the logical tree. Physical scrolling is the default scroll behavior for most Panel elements. WPF supports both types of scrolling.

http://msdn.microsoft.com/en-us/library/system.windows.controls.scrollviewer.cancontentscroll%28v=vs.110%29.aspx

Alternatively, you could try this fella:

SurfaceScrollViewer Class

Users can flick the content of a SurfaceScrollViewer control by touching the control, rapidly moving their finger a short distance, and then lifting their finger. When their finger is lifted, the content of the SurfaceScrollViewer control continues to move. The content then decelerates and comes to a stop. You can programmatically stop the movement caused by flicking by calling the StopFlick method.

You can manipulate the content of a SurfaceScrollViewer either by moving a scroll bar (like with the WPF SurfaceScrollViewer) or by direct touch interaction with the content itself. The ability to manipulate the content directly is called panning. By default, panning is enabled. You can disable it by setting the IsManipulationEnabled property to false.

http://msdn.microsoft.com/en-us/library/microsoft.surface.presentation.controls.surfacescrollviewer.aspx (Archived link)

Upvotes: 2

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