C# Winform画的坐标系,只需要设置坐标原点及X、Y轴的最大值

8976 次阅读 by 九九 2014-07-20 | 标签:nginx编译 php编译 问题 C# 总结

效果图:coodinate  原理: 1. 基于指定的(0, 0)坐标来画对应的X轴及Y轴线; 2. 基于统一的间距及换算方法来画出同比例的线条; 3. 每一个坐标都有三部分组成:

    1) 一线黑色线; 2) 刻度线(分长、短); 3) 对应于刻度的数值。

4. 使用到的类,主要使用Graphics里的DrawingString及DrawingLines实现;     代码实现:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;

namespace Project.Lib.Drawing.Components
{
    class Coordinate
    {
        ////// 坐标字体
        ///private Font _font;

        ////// 画图刷子
        ///private SolidBrush _brush;

        //////  字符串格式
        ///private StringFormat _sf;

        ////// 画笔
        ///private Pen _pen;
       
        ////// 每个单元的间距
        ///private int _space;

        ////// 画图对象
        ///private Graphics _g;

        ////// 0坐标点
        ///private Point _circle;

        ////// 短线
        ///private int _shortLine;

        ////// 中线
        ///private int _middleLine;

        ////// 长线
        ///private int _longLine;

        ////// 构造函数
        ///public Coordinate(Graphics g, Point circle)
        {
            _space      = 6;
            _circle     = circle;
            _g          = g;
            _shortLine  = 5;
            _middleLine = 10;
            _longLine   = 15;
            _font       = new Font("Airal", 7);
            _brush      = new SolidBrush(Color.Black);
            _sf         = new StringFormat();
            _pen        = new Pen(Color.Black, 1);
            _drawingCircle();
        }

        ////// 画原点
        ///private void _drawingCircle()
        {
            _sf.FormatFlags      = StringFormatFlags.DirectionRightToLeft;
            _g.DrawString("0", _font, _brush, new PointF(_circle.X - 6, _circle.Y - 10), _sf);
        }

        ////// 画Y标尺
        //////Y轴最大值
        public Coordinate DrawingY(int maxY)
        {
            int y               = 0;
            Point[] line        = null;
            _sf.FormatFlags     = StringFormatFlags.DirectionVertical;
            double total        = Math.Floor((maxY - _circle.Y) / _space * 1.0);
            for (int i = 0, j = 0; i < maxY && j < total; i++) {
                if (0 != i % _space) {
                    continue;
                }
                y = i + _circle.Y;
                j++;
                if (0 != j % 5) {
                    line = new Point[] {
                        new Point(_circle.X - _shortLine, y),
                        new Point(_circle.X, y)
                    };
                    _g.DrawLines(_pen, line);
                    continue;
                }
                _g.DrawString(j.ToString(), _font, _brush, new PointF(0, y), _sf);
                if (0 == j % 10) {
                    line = new Point[] {
                        new Point(_circle.X - _longLine, y),
                        new Point(_circle.X, y)
                    };
                } else {
                    line = new Point[] {
                        new Point(_circle.X - _middleLine, y),
                        new Point(_circle.X, y)
                    };
                }
                _g.DrawLines(_pen, line);
            }
            line = new Point[] {
                new Point(_circle.X, y),
                new Point(_circle.X, _circle.Y)
            };
            _g.DrawLines(_pen, line);

            return this;
        }

        ////// 画X轴
        /// 
        ///最大X坐标
        ///public Coordinate DrawingX(int maxX)
        {
            int x       = 0;
            Point[] line = null;
            double total = Math.Floor((maxX - _circle.X)/ _space * 1.0);
            _sf.FormatFlags      = StringFormatFlags.DirectionRightToLeft;
            for (int i = 0, j = 0; i < maxX && j < total; i++) {
                if (0 != i % _space) {
                    continue;
                }
                x = i + _circle.X;
                j++;
                if (0 != j % 5) {
                    line = new Point[] {
                        new Point(x, _circle.Y - _shortLine),
                        new Point(x, _circle.Y)
                    };
                    _g.DrawLines(_pen, line);
                    continue;
                }
                _g.DrawString(j.ToString(), _font, _brush, new PointF(x, 2), _sf);
                if (0 == j % 10) {
                    line = new Point[] {
                        new Point(x, _circle.Y - _longLine),
                        new Point(x, _circle.Y)
                    };
                } else {
                    line = new Point[] {
                        new Point(x, _circle.Y - _middleLine),
                        new Point(x, _circle.Y)
                    };
                }
                _g.DrawLines(_pen, line);
            }
            line = new Point[] {
                new Point(_circle.X, _circle.Y),
                new Point(x, _circle.Y)
            };
            _g.DrawLines(_pen, line);

            return this;
        }

    }
}

类使用:

Coordinate coordinate   = new Coordinate(e.Graphics, new Point(25, 20));
    coordinate.DrawingX(DrawBox.Width).DrawingY(DrawBox.Height);

还没有加上对应属性的getter/setter方法,你可以自行加上 ;) 欢迎交流~


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