Question

有没有办法在wpf中使用鼠标点击并拖动？我已经在xaml代码中禁用了我的应用程序上的边框，但在后面的代码中我试图做这样的事情：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;


namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private Size? _mouseGrabOffset;


        public MainWindow()
        {
            InitializeComponent(); 
        }
        protected override void OnMouseDown(MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Right)
                _mouseGrabOffset = new Size(e.Location);
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
                _mouseGrabOffset = new Size(e.Location);
            base.OnMouseDown(e);
        }
        protected override void OnMouseUp(MouseEventArgs e)
        {
            _mouseGrabOffset = null;

            base.OnMouseUp(e);
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (_mouseGrabOffset.HasValue)
            {
                this.Location = Cursor.Position - _mouseGrabOffset.Value;
            }

            base.OnMouseMove(e);
        }

基本上因为我的边框和标题栏被禁用，此代码应允许在我点击的任何地方控制应用程序。

我无法让它工作，因为这是基于Windows窗体。

修改

如果我尝试这个，我会得到一个定义错误，但我不确定如何处理它：

public partial class MainWindow : Window
{
    private Size? _mouseGrabOffset;


    public MainWindow()
    {
        InitializeComponent();
        this.MouseDown += new MouseButtonEventHandler(MainWindow_OnMouseDown);

    }
    void MainWindow_OnMouseDown(object sender, MouseEventArgs e)
    {
        if (e.LeftButton != MouseButtonState.Pressed)
            _mouseGrabOffset = new Size(e.Location);
            base.OnMouseMove(e);
    }
    protected override void OnMouseMove(MouseEventArgs e)
    {
        if (_mouseGrabOffset.HasValue)
        {
            this.Location = Cursor.Position - _mouseGrabOffset.Value;
        }

        base.OnMouseMove(e);
    }

RE EDIT

所以我现在尝试了一种如下所述的新方法，但仍然没有。

public partial class MainWindow : Window
{
    //private Size? _mouseGrabOffset;


    public MainWindow()
    {
        InitializeComponent();
        //this.MouseDown += new MouseButtonEventHandler(MainWindow_OnMouseDown);

    }
    public enum MouseButtonType 
    {
        Left,
        Middle,
        Right,
        XButton1,
        XButton2,

    }
    protected override void OnMouseDown(MouseButtonEventArgs e)
    {
        base.OnMouseDown(e);
    }
    protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
    {
        base.OnPreviewMouseDown(e);
    }

Answer 1

在你窗口的代码后面覆盖OnMouseDown和/或OnPreviewMouseDown

protected override void OnMouseDown(MouseButtonEventArgs e)
{
    base.OnMouseDown(e);
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
    base.OnPreviewMouseDown(e);
}

其次，检查MouseButtonEventArgs ChangedButton属性以确定按下了哪个Button。 public enum MouseButton（Left，Middle，Right，XButton1，XButton2} 相关的命名空间是System.Windows.Input; System.Windows.Forms不正确。

您的窗口不应按照之前的建议订阅自己的活动。使用替代。 this.MouseDown + = new MouseButtonEventHandler（MainWindow_OnMouseDown）; //不正确

Answer 2

除了另一个答案之外，您还可以在后面的代码中注册这样的事件：

  public MainWindow()
  {
      InitializeComponent(); 
      this.MouseDown += new MouseButtonEventHandler(MainWindow_MouseDown);
  }
  void MainWindow_MouseDown(object sender, MouseButtonEventArgs e)
  { 
        //handle it
  }

或者在XAML中注册：

<Window x:Class="WpfApplication1.MainWindow"
        ...
        MouseDown="Window_MouseDown">

Answer 3

相应的WPF事件位于System.Windows.Input namespace。具体而言，MouseDown attached event，MouseUp attached event和MouseMove attached event。要找出按下了哪个按钮，请使用ChangedButton property的MouseButtonEventArgs。

wpf中的鼠标移动

3 个答案: