PinchGestureRecognizer

A gesture recognizer that tracks a pinch gesture. A pinch gesture occurs when two pointer contacts are brought towards each other, or away from each other. This is useful in controls that implements a pinch to zoom interaction.

Using a PinchGestureRecognizer

A PinchGestureRecognizer can be attached to a control using the control's GestureRecognizers property.

<Image Stretch="UniformToFill"
        Margin="5"
        Name="image"
        Source="/image.jpg">
  <Image.GestureRecognizers>
    <PinchGestureRecognizer/>
  </Image.GestureRecognizers>
</Image>

C#

image.GestureRecognizers.Add(new PinchGestureRecognizer());

The PinchGestureRegonizer raises a Gestures.PinchEvent when it detects the start of a pull gesture. When the pull ends, from the pointer being released or another gesture start, it raises a Gestures.PinchEndedEvent. The Scale property in the args passed to the Gestures.PinchEvent event handler contains the relative size of the pinch since it started.

More Information

к сведению

View the source code on GitHub

PinchGestureRecognizer.cs

PinchEventArgs.cs