using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using System.Windows.Forms;

using System.Drawing.Imaging;

using System.Drawing.Drawing2D;

namespace 实验3

{

    public partial class Form1 : Form

    {

        Bitmap bitmap;

        int x, y;

        int picWidth;

        int picHeight;

        Graphics g;

        public Form1()

        {

            InitializeComponent();

            picWidth = 150;

            picHeight = 150;

        }

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            OpenFileDialog ofd = new OpenFileDialog();

            ofd.Filter = "图片文件|*.jpg;*.png;*.gif;*.bmp";

            if (ofd.ShowDialog() == DialogResult.OK)

            {

                Bitmap srcBitmap = new Bitmap(ofd.FileName);

                bitmap = new Bitmap(srcBitmap, picWidth, picHeight);

                this.pictureBox1.Image = bitmap;

            }

        }

        //-----

        //button

        private void button2_Click(object sender, EventArgs e)

        {

            y = y - 10;

            g = this.pictureBox1.CreateGraphics();

            g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, picWidth, picHeight);            // this.pictureBox1.Refresh(); 

        }

        private void button4_Click(object sender, EventArgs e)

        {

            x = x - 10;

            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, picWidth, picHeight);

        }

        private void button1_Click(object sender, EventArgs e)

        {

            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, bitmap.Width / 2, bitmap.Height / 2);

        }

        private void button3_Click(object sender, EventArgs e)

        {

            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, bitmap.Width * 2, bitmap.Height * 2);

        }

        private void button6_Click(object sender, EventArgs e)

        {

            x = x + 10;

            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, picWidth, picHeight); 

        }

        private void button5_Click(object sender, EventArgs e)

        {

            y = y + 10;

            g = this.pictureBox1.CreateGraphics(); g.Clear(this.BackColor);

            g.DrawImage(bitmap, x, y, picWidth, picHeight); 

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

    }

}