拖动后的动画效果

[flurrying]

假设窗体中有Label控件

实现的效果：
拖动Label控件，
鼠标放开以后。
Label控件出现动画效果 ,
Label控件回到拖动前的位置 .

[北京的雾霾天]

不知道这样算不算附合要求：

private Point m_OldPoint;
private Point m_OldLocation;
private void label1_MouseDown(object sender, MouseEventArgs e)
{
	Control ctr = sender as Control;
	this.m_OldPoint = this.PointToScreen(e.Location);
	m_OldLocation = ctr.Location;
}

private void label1_MouseMove(object sender, MouseEventArgs e)
{
	if (e.Button == MouseButtons.Left)
	{
		Control ctr = sender as Control;
		Point nPoint = this.PointToScreen(e.Location);
		Point n = ctr.Location;
		n.Offset(nPoint.X - this.m_OldPoint.X, nPoint.Y - this.m_OldPoint.Y);
		ctr.Location = n;
	}
}

private void label1_MouseUp(object sender, MouseEventArgs e)
{
	Control ctr = sender as Control;
	Point p = ctr.Location;
	Point op = m_OldLocation;

	if (p.X != op.X && p.Y!=op.Y)
	{
		float k = (p.Y - op.Y) / ((p.X - op.X) * 1.0f);

		if (p.X < op.X)
		{
			for (int x = p.X; x < op.X; x++)
			{
				float y = k * (x - p.X) + p.Y;
				ctr.Location = new Point(x, (int)y);
			}
		}
		else
		{
			for (int x = p.X; x > op.X; x--)
			{
				float y = k * (x - p.X) + p.Y;
				ctr.Location = new Point(x, (int)y);
			}
		}
	}
}

[LJH20002004200820131]

1楼的大侠 能不能解释下啊？

[flurrying]

就是这个效果
不过控件的画面变了！