Question

用C#的trackbar控件对图片放大，缩小，但对这程序意思不太懂，求高手帮忙解释下了。。

private void trackBar2_Scroll(object sender, EventArgs e)
{
Single LS = 1;
if (trackBar2.Value < 10)
{
LS = Convert.ToSingle(trackBar2.Value * 0.1);
}
if (trackBar2.Value == 10)
{
LS = 1;
}
else
{
if (trackBar2.Value > 10)
{
LS = Convert.ToSingle(trackBar2.Value - 10);
}
}
int pwidth = ig.Width;
int pheight = ig.Height;
ptbNewPic.Width = Convert.ToInt32(pwidth * LS);
ptbNewPic.Height = Convert.ToInt32(pheight * LS);
}

Answer 1

LS是原图放大倍数
滑条的中间点是10，图片为原图大小，小于10，按比例缩小，8的话就是80%大小，大于10，这段代码有问题