鼠标单击并拖动事件WPF

本文介绍了鼠标单击并拖动事件WPF的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我正在开发一个模拟时钟选择器控制。 用户能够点击分针或小时针并拖动以选择指定的时间。我想知道如何检测这样的点击和拖动事件。

我尝试使用MouseLeftButtonDown + MouseMove，但是我无法让它工作，因为MouseMove始终触发，当mousemove发生，尽管我使用一个标志。有什么更容易的方法吗？

public bool dragAction = false; private void minuteHand_MouseLeftButtonDown（object sender，MouseButtonEventArgs e） { dragAction = true; minuteHand_MouseMove（this.minuteHand，e）; } private void minuteHand_MouseMove（object sender，MouseEventArgs e） { if（dragAction == true） { //我的代码：移动针} } private void minuteHand_MouseLeftButtonUp（object sender，MouseEventArgs e） { dragAction = false; }

解决方案

不需要处理鼠标向下/向上：

private void minuteHand_MouseMove（object sender，MouseEventArgs e） { if（Mouse.LeftButton == MouseButtonState.Pressed） { //我的代码：移动针} }

I am developing an analog clock picker control. The user is able to click on the minute or hour hand and drag to turn the needle to select the specific time. I was wondering how to detect such a click and drag event.

I tried using MouseLeftButtonDown + MouseMove but I cannot get it to work as MouseMove is always trigger when the mousemove happen despite me using a flag. Is there any easier way?

public bool dragAction = false; private void minuteHand_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { dragAction = true; minuteHand_MouseMove(this.minuteHand, e); } private void minuteHand_MouseMove(object sender, MouseEventArgs e) { if (dragAction == true) { //my code: moving the needle } } private void minuteHand_MouseLeftButtonUp(object sender, MouseEventArgs e) { dragAction = false; }

解决方案

You can make things easier and need not handle mouse down / up :

private void minuteHand_MouseMove(object sender, MouseEventArgs e) { if (Mouse.LeftButton == MouseButtonState.Pressed) { //my code: moving the needle } }