Windows Phone 7 Image Controller: Zoom In, Zoom Out, and Rotate (WP 7 图像控制器:放大,缩小,旋转)

第一步: 下载 Silverlight for Windows Phone Toolkit - Nov 2010 安装的时候要暂时关闭VS (Visual Studio), 安装完后,打开VS,添加参考(Add References): Microsoft.Phone.Controls.Toolkit


第二步: 在WP 7 XAML文件中添加xmlns references:

xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"


第三步: 在XAML文件中设定image属性

<Image x:Name ="image1" RenderTransformOrigin="0.5, 0.5" CacheMode="BitmapCache" Height="662" Width="480">

        <Image.RenderTransform>

        <CompositeTransform x:Name="transform" />

        </Image.RenderTransform>


        <toolkit:GestureService.GestureListener>

                <toolkit:GestureListener PinchStarted="OnPinchStarted" PinchDelta="OnPinchDelta" DragDelta="Postcard_ManipulationDelta"/>

        </toolkit:GestureService.GestureListener>

</Image>


第四步:在CS文件中编写相关的Event Handler:

      //Pinch Event Hanlder, including rotation, scale

        private void OnPinchStarted(object sender, PinchStartedGestureEventArgs e)

        {

            initialAngle = transform.Rotation;

            initialScale = transform.ScaleX;

        }

        private void OnPinchDelta(object sender, PinchGestureEventArgs e)

        {

            transform.Rotation = initialAngle + e.TotalAngleDelta;

            transform.ScaleX = initialScale * e.DistanceRatio;

            transform.ScaleY = initialScale * e.DistanceRatio;

        }

        private void Postcard_ManipulationDelta(object sender, DragDeltaGestureEventArgs e)

        {

            //moving along X axis

            transform.TranslateX += e.HorizontalChange;

            //moving along Y axis

            transform.TranslateY += e.VerticalChange;

        }

    }

}

搞定,我也是刚接触WP 7 编程,欢迎大家一起讨论学习。

posted @ 2011-08-02 01:12  浦风  阅读(798)  评论(0编辑  收藏  举报