对于控件中的滚动条,鼠标滚轮不能实现滚动,是否有解决方法?

Question

对于控件中的滚动条,鼠标滚轮不能实现滚动,是否有解决方法?

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aaaa

Answer 1

用JavaScript参考DeepZoom有个Wheel类,就是JavaScript加的滚轮

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Answer 2

SL3 一个新的feature就是对MouseWheel event的支持,可以自己在event 处理中通过AutomationPeer实现"自动"滚动的动作.

Answer 3

sl3太强大了,终于有滚轮了,我还没来及读完sdk document :)

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Answer 4

    public class ScrollViewerExtensions : DependencyObject
    {
        public static readonly DependencyProperty EnableMouseWheelProperty = DependencyProperty.RegisterAttached("EnableMouseWheel", typeof(bool), typeof(ScrollViewerExtensions), new PropertyMetadata(false, OnEnableMouseWheelPropertyChanged));
        
        public static void SetEnableMouseWheel(DependencyObject obj, bool value)
        {
            obj.SetValue(EnableMouseWheelProperty, value);
        }

        public static bool GetEnableMouseWheel(DependencyObject obj)
        {
            return (bool)obj.GetValue(EnableMouseWheelProperty);
        }

        public static void OnEnableMouseWheelPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ScrollViewer scrollViewer = d as ScrollViewer;
            if ((bool)e.NewValue)
            {
                scrollViewer.MouseWheel += new MouseWheelEventHandler(scrollViewer_MouseWheel);
            }
        }

        public static void scrollViewer_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            ScrollViewer viewer = sender as ScrollViewer;
            if (viewer == null)
                return;
            double num = Math.Abs((int)(e.Delta / 4));
            double offset = 0.0;
            if (e.Delta > 0)
            {
                offset = Math.Max((double)0.0, (double)(viewer.VerticalOffset - num));
            }
            else
            {
                offset = Math.Min(viewer.ScrollableHeight, viewer.VerticalOffset + num);
            }
            if (offset != viewer.VerticalOffset)
            {
                viewer.ScrollToVerticalOffset(offset);
                e.Handled = true;
            }
        }
    }

我写了一个ScrollViewerExtensions的类，你可以直接用

在Xaml里或cs里都可以

Answer 5

你好，我是天使坠，前些日子我有一个好朋友，她交给了我一个方法，贴出来给你试试，希望能帮助你！

<script type="text/javascript">
    var _control;
    function onLoad(sender) {
        _control = sender.get_element();
        if (window.addEventListener)
            window.addEventListener('DOMMouseScroll', OnMouseWheelTurned, false);
        window.onmousewheel = document.onmousewheel = OnMouseWheelTurned;
    }
    function OnMouseWheelTurned(event) { 
     var delta = 0;
    if (!event)
        event = window.event;
    if (event.wheelDelta)
    {
        delta = event.wheelDelta;
        if (window.opera)
            delta = -delta;
    }
    else if (event.detail)
        delta = -event.detail;
    if (delta)
    {
        if (delta > 0)
            _control.content.magic.zoomin();
        else
            _control.content.magic.zoomout();
}
    if (event.preventDefault)
        event.preventDefault();
    event.returnValue = false;
}

</script>

<Grid x:Name="LayoutRoot" Background="White">
        <Canvas>
            <!--<Canvas.RenderTransform>
               <ScaleTransform x:Name="ZoomTransform" CenterX="0.5" CenterY="0.5" />
            </Canvas.RenderTransform>-->
            <Rectangle x:Name="rect" Width="100" Height="100" Fill="AliceBlue">
                <Rectangle.RenderTransform>
                    <ScaleTransform x:Name="ZoomTransform" CenterX="50" CenterY="50"  />
                </Rectangle.RenderTransform>
            </Rectangle>
            <!--<Image Source="a.jpg" x:Name="img"></Image>-->
        </Canvas>
</Grid>

namespace test
{
    [ScriptableType]
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();
        }

        [ScriptableMember()]
        public void zoomin()
        {
            ZoomTransform.ScaleX += 0.1;
            ZoomTransform.ScaleY += 0.1;

        }

        [ScriptableMember()]
        public void zoomout()
        {
            ZoomTransform.ScaleX -= 0.1;
            ZoomTransform.ScaleY -= 0.1;





        }

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努力！写一个js解析器,一个svg插件,一个绘图程序,做好自己,呵呵～！

Answer 6

    public class ScrollViewerExtensions : DependencyObject

    {

        public static readonly DependencyProperty EnableMouseWheelProperty = DependencyProperty.RegisterAttached("EnableMouseWheel", typeof(bool), typeof(ScrollViewerExtensions), new PropertyMetadata(false, OnEnableMouseWheelPropertyChanged));

        

        public static void SetEnableMouseWheel(DependencyObject obj, bool value)

        {

            obj.SetValue(EnableMouseWheelProperty, value);

        }



        public static bool GetEnableMouseWheel(DependencyObject obj)

        {

            return (bool)obj.GetValue(EnableMouseWheelProperty);

        }



        public static void OnEnableMouseWheelPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            ScrollViewer scrollViewer = d as ScrollViewer;

            if ((bool)e.NewValue)

            {

                scrollViewer.MouseWheel += new MouseWheelEventHandler(scrollViewer_MouseWheel);

            }

        }



        public static void scrollViewer_MouseWheel(object sender, MouseWheelEventArgs e)

        {

            ScrollViewer viewer = sender as ScrollViewer;

            if (viewer == null)

                return;

            double num = Math.Abs((int)(e.Delta / 4));

            double offset = 0.0;

            if (e.Delta > 0)

            {

                offset = Math.Max((double)0.0, (double)(viewer.VerticalOffset - num));

            }

            else

            {

                offset = Math.Min(viewer.ScrollableHeight, viewer.VerticalOffset + num);

            }

            if (offset != viewer.VerticalOffset)

            {

                viewer.ScrollToVerticalOffset(offset);

                e.Handled = true;

            }

        }

    }

我写了一个ScrollViewerExtensions的类，你可以直接用

在Xaml里或cs里都可以

这个怎么用?

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aaaa

Answer 7

这是用Javascript实现的，用DomBridge来连接，
在SL3里，可以直接用MouseWheel event + AutomationPeer来实现。
举个DataGrid的例子：

dataGrid.MouseWheel += new MouseWheelEventHandler(dataGrid_MouseWheel);

void dataGrid_MouseWheel(object sender, MouseWheelEventArgs e)

        {

            DataGrid dg = sender as DataGrid; 

            DataGridAutomationPeer dapeer = (DataGridAutomationPeer)DataGridAutomationPeer.CreatePeerForElement(dg);

            IScrollProvider provider = (IScrollProvider)dapeer.GetPattern(PatternInterface.Scroll);

            if (provider != null)

            {

                if (e.Delta < 0)

                    provider.Scroll(ScrollAmount.NoAmount, ScrollAmount.SmallIncrement);

                if (e.Delta > 0)

                    provider.Scroll(ScrollAmount.NoAmount, ScrollAmount.SmallDecrement);

            }

 

        }

 

Answer 8

我看到SL3的System.Windows.Controls命名空间下多了一个ScrollViewerExtensions，但是是静态类，我没能成功在xaml里设置IsMouseWheelScrollingEnabled，但是后台是可以的

不知道是不是正常的

Answer 9

如果是SL3的话！是不用写任何代码的~

System.Windows.Controls下，MS已经提供了ScrollViewerExtensiens，有兴趣的可以看看


我这个没那个功能丰富，保存为一个class，然后ScrollViewerExtensiens.SetEnableMouseWheel(scrollViewer, true);就可以了