Win RT Xaml GridView：拖动 select 多个项目

Question

我正在尝试 select GridView 中的多个项目，方法是用鼠标悬停在它们上面（如绘图）。我试图通过 PointerEntered 事件实现此目的，但我无法通过代码更改选择。有没有办法实现自定义 selection 模式？

这对我不起作用，因为我无法在 Win RT XAML 中使用 Style.Triggers：

Answer 1

您将必须继承 gridview 控件并覆盖 PrepareContainerForItemOverride 方法：

代码：

public class MyGridView : GridView
{

    protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
    {
        (element as GridViewItem).PointerMoved += MyGridView_PointerMoved;

        base.PrepareContainerForItemOverride(element, item);
    }

    private void MyGridView_PointerMoved(object sender, PointerRoutedEventArgs e)
    {

 //your logic for setting the isselected
         (sender as GridViewItem).IsSelected = true;
    }
}

Answer 2

这就是我最终根据 Chirag Shah 的回答实现它的方式：

class MyGridView : GridView
{
    protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
    {
        (element as GridViewItem).PointerEntered += SelectItemOnEntered;
        (element as GridViewItem).AddHandler(PointerPressedEvent, new PointerEventHandler(SelectItemOnPressed), true);
        base.PrepareContainerForItemOverride(element, item);
    }

    private void SelectItemOnPressed(object sender, PointerRoutedEventArgs e)
    {
        (sender as GridViewItem).IsSelected = !(sender as GridViewItem).IsSelected;
    }

    private void SelectItemOnEntered(object sender, PointerRoutedEventArgs e)
    {
        if (e.Pointer.IsInContact)
            (sender as GridViewItem).IsSelected = !(sender as GridViewItem).IsSelected;
    }
}

希望对想实现这个选择模式的大家有所帮助

Win RT Xaml GridView：拖动 select 多个项目

Win RT Xaml GridView: Drag select multiple items

xaml

gridview

winrt-xaml

win-universal-app