WinForm画网格并填充颜色

因为研究CodeCombat上的最后一题，自己尝试分解题目，然后想到需要画网格，还有最优化的方法

源代码如下

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace DrawGrid

{

    public partial class Form1 : Form

    {

        int multiple = 20;

        int width = 20;

        int height = 16;

        int w = 4;

        int h = 4;

        Pen bluePen = new Pen(Color.Black);



        public Form1()

        {

            InitializeComponent();

        }



        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            Console.WriteLine("Form长：{0}，宽：{1}", this.Width, this.Height);

            this.Multiple();

            DrawGrid(width, height, w, h, e);

           

            List<Rectangle> l = new List<Rectangle>();

            Rectangle r;

            r = new Rectangle(0, w, 2 * w, h); l.Add(r);

            r = new Rectangle(3 * w, 0, 2 * w, h); l.Add(r);

            r = new Rectangle(2 * w, 3 * w, 2 * w, h); l.Add(r);

            foreach (Rectangle r1 in l)

            {

                e.Graphics.FillRectangle(new SolidBrush(Color.Black), r1);

            }

        }



        /// <summary>

        /// 将比例放大

        /// </summary>

        private void Multiple()

        {

            width = width * multiple;

            height = height * multiple;

            w = w * multiple;

            h = h * multiple;

        }



        private void Form1_MouseDown(object sender, MouseEventArgs e)

        {

            Console.WriteLine("X={0},Y={1}", e.X, e.Y);

        }



        /// <summary>

        /// 画网格

        /// </summary>

        /// <param name="width"></param>

        /// <param name="height"></param>

        /// <param name="w"></param>

        /// <param name="h"></param>

        private void DrawGrid(int width, int height, int w, int h, PaintEventArgs e)

        {

            Point p1 = new Point();

            Point p2 = new Point();



            p1.X = 0; p2.X = width;

            for (int y = 0; y <= height; y = y + h)

            {

                p1.Y = y; p2.Y = y;

                DrawLine(p1, p2, e);

            }

            p1.Y = 0; p2.Y = height;

            for (int x = 0; x <= width; x = x + w)

            {

                p1.X = x; p2.X = x;

                DrawLine(p1, p2, e);

            }

        }



        /// <summary>

        /// 画直线

        /// </summary>

        /// <param name="p1"></param>

        /// <param name="p2"></param>

        private void DrawLine(Point p1, Point p2, PaintEventArgs e)

        {

            e.Graphics.DrawLine(bluePen, p1, p2);

        }

    }

}

 

自己的测试图片如上图，是一个5*4的网格；

有三个地方已经被填充了。

剩下空白的地方，需可以用矩形填充。

考虑使用最少的矩形填充，应该就是4个矩形了。一目了然。

不过，如果考虑用程序实现的话，就复杂了。以后再尝试