在uwp中使用ActiveCustomDrying时如何删除InkStroke?

问题描述

我使用了ActiveCustomDrying来定制墨水，现在我想删除它们InkStrokes.由于激活了CustomDrying，所以StrokeContainer是null，所以我无法使用DeleteSelected方法删除InkStrokes.谁能建议我在使用CustomDrying时如何删除InkStrokes.

I used the ActiveCustomDrying to customize the ink, now I want to remove them InkStrokes. StrokeContainer is null because of active the CustomDrying, so I am unable to remove the InkStrokes by using the DeleteSelected method. Can anyone suggest me how to remove the InkStrokes when using the CustomDrying.

推荐答案

在自定义干燥期间，您将笔划存储在自定义List<InkStrokeContainer>集合中:

During the custom drying, you will store the strokes in a custom List<InkStrokeContainer> collection:

private void InkPresenter_StrokesCollected(InkPresenter sender, InkStrokesCollectedEventArgs args)
{
    var strokes = _inkSynchronizer.BeginDry();

    var container = new InkStrokeContainer();
    container.AddStrokes(from item in strokes
        select item.Clone());
    _strokes.Add(container);

    _inkSynchronizer.EndDry();
}

现在您可以手动操作InkStrokeContainer实例(包括对DeleteSelected的调用).

Now you can manipulate the InkStrokeContainer instances manually (including calls to DeleteSelected).

文档还指出，当使用ActiveCustomDrying时，使用InkToolbar进行擦除无法自动进行，您需要手动处理指针事件

The documentation also states that when using ActiveCustomDrying, erasing with InkToolbar does not work automatically and you need to handle the pointer events manually

如果要实现命令，则需要观察工具栏按钮的Checked和Unchecked事件，然后自己处理指针事件.有关如何执行此操作的完整教程，请在MSDN上可用.

If you want to implement the commands, you will need to observe the Checked and Unchecked events of the toolbar buttons and then handle the pointer events yourself. A complete tutorial how to do this is available on MSDN.

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