窗体抖动效果

C# 类似QQ的窗体抖动效果

/// <summary>
/// 抖动窗体
/// </summary>
/// <param name="frm">窗体</param>
public void JitterForm(Form frm)
{
    Point pOld = frm.Location;//原来的位置
    int radius = 3;//半径
 
    for (int n = 0; n < 3; n++) //旋转圈数
    {
        //右半圆逆时针
        for (int i = -radius; i <= radius; i++)
        {
            int x = Convert.ToInt32(Math.Sqrt(radius * radius - i * i));
            int y = -i;
 
            frm.Location = new Point(pOld.X + x, pOld.Y + y);
            System.Threading.Thread.Sleep(10);
        }
        //左半圆逆时针
        for (int j = radius; j >= -radius; j--)
        {
            int x = -Convert.ToInt32(Math.Sqrt(radius * radius - j * j));
            int y = -j;
 
            frm.Location = new Point(pOld.X + x, pOld.Y + y);
            System.Threading.Thread.Sleep(10);