Question

我知道您可以使用this使用表单点击并拖动但是说我希望它不使用该代码并使用我自己的代码，我该怎么做呢？

这是我到目前为止所做的：

public partial class Form1 : Form
{
    MouseDragFormMove dragForm;

    public Form1()
    {
        InitializeComponent();

        dragForm = new MouseDragFormMove(this);
        dragForm.AllowMouseDownDrag = true;
    }
}       
public class MouseDragFormMove
{
    private bool _status;
    public bool AllowMouseDownDrag
    {
        get { return _status; }
        set { _status = value; }
    }

    private Form parent;
    public MouseDragFormMove(Form self)
    {
        _status = false;
        parent = self;
        parent.MouseDown +=new MouseEventHandler(parent_MouseDown);
        parent.MouseUp += new MouseEventHandler(parent_MouseUp);
        parent.MouseMove +=new MouseEventHandler(parent_MouseMove);            
    }

    public void showPos()
    {
        MessageBox.Show(parent.Location.X + ", " + parent.Location.Y);
    }

    private Point CPoint;
    private Point MPoint;
    private bool isDragging;

    private void parent_MouseDown(object sender, MouseEventArgs e)
    {
        CPoint = parent.Location;
        MPoint = getMousePoint(e, CPoint);
        isDragging = true;
    }
    private void parent_MouseUp(object sender, MouseEventArgs e)
    {
        isDragging = false;
    }
    private void parent_MouseMove(object sender, MouseEventArgs e)
    {
        CPoint = parent.Location;
        MPoint = getMousePoint(e, CPoint);

        if (isDragging && _status)
        {
            parent.Location = MPoint;
        }
    }
    private Point getMousePoint(MouseEventArgs e, Point FP)
    {
        int x = FP.X + (e.Location.X * 2);
        int y = FP.Y + (e.Location.Y * 2);

        return new Point(x, y);
    }
}

我做错了什么？我无法让它发挥作用。此外，它也会闪烁

Answer 1

问题是您使用的是相对于表单的鼠标点，而不是相对于屏幕。请参阅下面的解决方案我正在使用Cursor.Position来获取鼠标屏幕位置。

public class MouseDragFormMove
{
    private bool _status;
    public bool AllowMouseDownDrag
    {
        get { return _status; }
        set { _status = value; }
    }

    private Form parent;
    public MouseDragFormMove(Form self)
    {
        _status = false;
        parent = self;
        parent.MouseDown += new MouseEventHandler(parent_MouseDown);
        parent.MouseUp += new MouseEventHandler(parent_MouseUp);
        parent.MouseMove += new MouseEventHandler(parent_MouseMove);
    }

    private Point MPoint;
    private bool isDragging;
    private Point touchPoint;

    private void parent_MouseDown(object sender, MouseEventArgs e)
    {
        isDragging = true;

        // Capture the point relative to the form
        touchPoint = e.Location;
    }
    private void parent_MouseUp(object sender, MouseEventArgs e)
    {
        isDragging = false;
    }

    private void parent_MouseMove(object sender, MouseEventArgs e)
    {
        MPoint = new Point(Cursor.Position.X - touchPoint.X, Cursor.Position.Y - touchPoint.Y);

        if (isDragging && AllowMouseDownDrag && !parent.Location.Equals(MPoint))
        {
            parent.Location = MPoint;
        }
    }
}

C＃Click form＆amp;拖，上课

1 个答案: