Question

这是我的XAML：

<ListBox x:Name="MyListBox" FontSize="40"
            SelectionChanged="MyListBox_SelectionChanged">
</ListBox>

在这个代码隐藏（下面）中，我试图为删除操作设置动画。选择项目后，我将其删除。我用ScaleTransform直观地为它制作动画。在WPF中我会使用LayoutTransform，但由于我在WP / SL中只有RenderTransform，我使用的是RenderTransform - 因此周围的布局没有响应大小的变化。记录仍然被正确删除，但视觉效果减弱了。

有没有办法在WP中执行此操作？有没有办法调整ListBoxItem的大小以便周围的内容响应？

ObservableCollection<string> m_Data;

public MainPage()
{
    InitializeComponent();
    m_Data = new ObservableCollection<string>   
        { "One", "Two", "Three", "Four" };
    MyListBox.ItemsSource = m_Data;
}

private void MyListBox_SelectionChanged(object sender,
    SelectionChangedEventArgs e)
{
    // fetch ListBoxItem
    if (e.AddedItems.Count == 0)
        return;
    var _Data = e.AddedItems[0] as string;
    var _Item = MyListBox.ItemContainerGenerator
        .ContainerFromItem(_Data) as ListBoxItem;

    // setup to resize using scale transform
    var _Scale = new ScaleTransform
    {
        CenterX = _Item.RenderSize.Width / 2,
        CenterY = _Item.RenderSize.Height / 2,
        ScaleX = .99,
        ScaleY = .99
    };
    _Item.RenderTransform = _Scale;

    // setup storyboard
    var _Story = new Storyboard();
    _Story.Completed += (s, e1) =>
    {
        // remove data from collection
        m_Data.Remove(_Data);
    };

    // animate scale X
    var _AnimationX = new DoubleAnimation
    {
        To = .01,
        Duration = TimeSpan.FromSeconds(2),
    };
    _Story.Children.Add(_AnimationX);
    Storyboard.SetTarget(_AnimationX, _Scale);
    Storyboard.SetTargetProperty(_AnimationX,
        new PropertyPath(ScaleTransform.ScaleXProperty));

    // animate scale Y
    var _AnimationY = new DoubleAnimation
    {
        To = .01,
        Duration = TimeSpan.FromSeconds(2),
    };
    _Story.Children.Add(_AnimationY);
    Storyboard.SetTarget(_AnimationY, _Scale);
    Storyboard.SetTargetProperty(_AnimationY,
        new PropertyPath(ScaleTransform.ScaleYProperty));

    _Story.Begin();
}

Answer 1

你也可以使用LayoutTransform on Windows Phone，所以我会使用它。。

WP7：LayoutTransform一个ListBoxItem

1 个答案: