C#一个画图简单功能问题

Question

我在picturebox1建立坐标轴，并画了一幅4个同心圆图，现在我想用button实现对图形的刷新、平移、变大、变小功能，但是不知道怎么入手，望各位高手给予帮助，在此谢过各位啦！

Answer 1

刷新 : 重新画4个同心圆图
平移 : 用GDI+的TransportTranlte.
变大、变小 : 用GDI+的Scale.

Answer 2

刷新就是重画,平移用Graphics的TranslateTransform
放大,缩小可以用Graphics的ScaleTransform实现,它放大是相当于用放大镜
可以参考下:
http://topic.csdn.net/t/20061212/17/5225485.htmlhttp://www.cnblogs.com/XieKe-cs01/archive/2008/02/26/346771.html

Answer 3

public partial class Form1 : Form
    {
        Graphics g;
        public Form1()
        {
            InitializeComponent();
            g = panel1.CreateGraphics();
        }        /// <summary>
        /// 移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {            
            g.TranslateTransform(50, 0);
            panel1.Invalidate();
         }        /// <summary>
        /// 刷新画圆
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 110), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 110), new Size(40, 40)));       
        }        /// <summary>
        /// 变大
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            g.ScaleTransform(2, 2);
            panel1.Invalidate();
        }        /// <summary>
        /// 变小
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            g.ScaleTransform((float)0.5, (float)0.5);
            panel1.Invalidate();
        }
    }

Answer 4

http://download.csdn.net/source/775720
下载这个看看吧!