防止滚动WP7上的C＃全景项或枢纽项目的最后一个项目 [英] Prevent scrolling on last item of panorama item or pivot item wp7 c#

问题描述

我的支点项目n个。如何阻止最后滚动到第一个项目。任何帮助将不胜感激。

I have n number of pivot items . How to stop scrolling from last to first item. Any help will be greatly appreciated.

推荐答案

我不知道这会的工作，因此作为乌卢格别克Umirov注释中说 - 它是依赖于操作系统的版本。我没有模拟器现在就试试，但你可以尝试这样做是这样的：

I'm not sure if that would work, hence as Ulugbek Umirov said in comments - it is dependant on OS version. I don't have emulator right now to try, but you may try to do it like this:

public MainPage()
{
   InitializeComponent();
   myPivot.IsHitTestVisible = false; // disable your Pivot
   Touch.FrameReported += Touch_FrameReported;
   TouchPanel.EnabledGestures = GestureType.HorizontalDrag; 
}

TouchPoint first;
private const int detectRightGesture = 20;

private void Touch_FrameReported(object sender, TouchFrameEventArgs e)
{
    TouchPoint mainTouch = e.GetPrimaryTouchPoint(this);
    if (mainTouch.Action == TouchAction.Down)
        first = mainTouch;
    else if (mainTouch.Action == TouchAction.Up && TouchPanel.IsGestureAvailable)
    {
        if (mainTouch.Position.X - first.Position.X < -detectRightGesture)
        {
            if (myPivot.SelectedIndex < myPivot.Items.Count - 1)
                myPivot.SelectedIndex++;
        }
        else if (mainTouch.Position.X - first.Position.X > detectRightGesture)
        {
            if (myPivot.SelectedIndex > 0)
                myPivot.SelectedIndex--;
        }
    }
}

据的 MSDN - 的TouchPanel 应该可以从WP7.1和的 Touch.FrameReported事件应该可以在WP7.0。所以有机会的话，它会正常工作。

According to MSDN - TouchPanel should be available from WP7.1 and Touch.FrameReported Event should be available on WP7.0. Therefore there is a chance that it will work.

您必须添加引用 Microsoft.Xna.Framework.Input.Touch 组装。

我还添加了 detectRightGesture ，这样枢轴不小的垂直切换拖动，它的测试，如果将需要的事项。

I've also added detectRightGesture so that Pivot won't be switched on small vertical drags, it's a matter of test if that will be needed.

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