如何在 WPF FrameworkElement 上同时捕获单击和双击事件?

问题描述

我可以像这样在 TextBlock 上捕获单击:

I can catch a single-click on a TextBlock like this:

private void TextBlock_MouseDown(object sender, MouseButtonEventArgs e)
{
    MessageBox.Show("you single-clicked");
}

我可以像这样在 TextBlock 上捕获 双击:

I can catch a double-click on a TextBlock like this:

private void TextBlock_MouseDown(object sender, MouseButtonEventArgs e)
{
    if (e.LeftButton == MouseButtonState.Pressed)
    {
        if (e.ClickCount == 2)
        {
            MessageBox.Show("you double-clicked");
        }
    }
}

但是如何在单个 TextBlock 上同时捕捉它们并区分两者?

推荐答案

您需要在点击序列结束后触发事件……那是什么时候?我建议使用计时器.MouseDown 事件将重置它并增加点击次数.当计时器间隔过去时，它会调用以评估点击次数.

You need to fire the event after the click sequence is over... when is that? I suggest using a timer. The MouseDown event would reset it and increase the click count. When timer interval elapses it makes the call to evaluate the click count.

    private System.Timers.Timer ClickTimer;
    private int ClickCounter;

    public MyView()
    {
        ClickTimer = new Timer(300);
        ClickTimer.Elapsed += new ElapsedEventHandler(EvaluateClicks);
        InitializeComponent();
    }

    private void TextBlock_MouseDown(object sender, MouseButtonEventArgs e)
    {
        ClickTimer.Stop();
        ClickCounter++;
        ClickTimer.Start();
    }

    private void EvaluateClicks(object source, ElapsedEventArgs e)
    {
        ClickTimer.Stop();
        // Evaluate ClickCounter here
        ClickCounter = 0;
    }

干杯！

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