GestureListener in ScrollViewer on Windows phone 7 does not work

Question

I have a prblem: If I enter this kind of xaml:

<Grid Grid.Row="1">
    <ScrollViewer Name="scrolViewer" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" BorderBrush="AliceBlue"
            BorderThickness="5" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
        <Image Name="mapImage" CacheMode="BitmapCache" RenderTransformOrigin="0.5 0.5">
            <Image.RenderTransform>
                <CompositeTransform x:Name="transform" />
            </Image.RenderTransform >
            <toolkit:GestureService.GestureListener>
                <toolkit:GestureListener PinchStarted="OnPinchStarted" PinchDelta="OnPinchDelta" />
            </toolkit:GestureService.GestureListener>

Gestures does not work, but image slides as it is expected to. If I remove tag - gestures begin to work. How do I enable guestures to zoom and rotate image inside scrollviewer or how do I create my own scrollviewer based on gestures. Thanx in advance!

Answer 1

I'm not sure putting your image in a ScrollViewer is a great idea as it's possible the gesture handling between ScrollViewer and GestureListener will compete.

See Jeff Prosise's blog for an example of how to zoom/rotate using GestureListener . The whole blog post series is very useful if you want to learn more about WP7 touch.

(Thanks to Derek's answer to a previous SO question .)