使用c#制作坐标
1、建立坐标
2、坐标系的放大缩小
3、标定刻度
4、实时显示鼠标在坐标系上的坐标
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace coordinates
{
public partial class Form1 : Form
{
private PictureBox pictureBox;
private float zoomFactor = 1.2f; //初始放缩因子
private float zoomLevel = 1.0f; //每次滚动缩放变化的步长
private Point offset; // 视图偏移量
public Form1()
{
InitializeComponent();
// 初始化 PictureBox
pictureBox = new PictureBox
{
Dock = DockStyle.Fill, //填满窗体
SizeMode = PictureBoxSizeMode.AutoSize
};
this.Controls.Add(pictureBox);
// 订阅 Paint 事件
pictureBox1.Paint += PictureBox_Paint;
// 为pictureBox1的MouseWheel事件添加处理程序
this.pictureBox1.MouseWheel += new MouseEventHandler(pictureBox1_MouseWheel);
//订阅鼠标移动事件
this.pictureBox1.MouseMove += new MouseEventHandler(pictureBox1_MouseMove);
}
private string fullname = null;//图像文件完整路径
public Form1(string a)
{
InitializeComponent1();
fullname = a;
}
private int originalWidth;
private int originalHeight;
private void InitializeComponent1()
{
// 初始化 PictureBox 的原始大小
originalWidth = pictureBox1.Width;
originalHeight = pictureBox1.Height;
// 其他初始化代码
}
//鼠标滚轮事件
private void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
{
// 根据鼠标滚轮的滚动方向调整缩放级别
if (e.Delta > 0)
{
zoomLevel *= 1.1f; // 放大
}
else
{
zoomLevel /= 1.1f; // 缩小
}
// 确保缩放级别在合理范围内（放大到最大，缩小到最小）
zoomLevel = Math.Max(0.1f, Math.Min(1.0f, zoomLevel));
// 重新绘制 PictureBox
pictureBox1.Invalidate();
}
//画板制作--网格坐标
private void PictureBox_Paint(object sender, PaintEventArgs e)
{
// 网络坐标
Graphics g = e.Graphics;
Pen gridPen = new Pen(Color.LightGray, 1); // 网格线的颜色和宽度
Font font = new Font("Arial", 8);
SolidBrush brush = new SolidBrush(Color.Black); //实例画刷
// 获取 PictureBox 的尺寸
int width = pictureBox1.Width;
int height = pictureBox1.Height;
// 根据放缩级别调整网格线的绘制间隔
int gridSize = (int)(15 / zoomLevel); // zoomLevel步长
// ———————————绘制网格坐标线————————————
//水平线
for (int i = width / 2; i <= width; i += gridSize)
{
g.DrawLine(gridPen, i, 0, i, height);
}
for (int i = width / 2 - gridSize; i >= 0; i -= gridSize)
{
g.DrawLine(gridPen, i, 0, i, height);
}
// 垂直线
for (int i = height / 2; i <= height; i += gridSize)
{
g.DrawLine(gridPen, 0, i, width, i);
}
for (int i = height / 2 - gridSize; i >= 0; i -= gridSize)
{
g.DrawLine(gridPen, 0, i, width, i);
}
// 绘制坐标轴
Pen axisPen = new Pen(Color.Black, 2);
axisPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash; // 设置为虚线
g.DrawLine(axisPen, 0, height / 2, width, height / 2); // X轴
g.DrawLine(axisPen, width / 2, 0, width / 2, height); // Y轴
// 绘制顶部刻度线
// 假设你想让刻度值从 0 开始，每条刻度线增加 1
int scaleValue = 0;
for (int i = width / 2; i <= width; i += gridSize)
{
g.DrawLine(axisPen, i, 0, i, 5); // 顶部刻度线
g.DrawString(scaleValue.ToString(), font, brush, i - 5, 10); // 顶部刻度值
//scaleValue++;
scaleValue += 5;
}
scaleValue =0;
for (int i = width / 2 ; i >= 0; i -= gridSize)
{
g.DrawLine(axisPen, i, 0, i, 5); // 顶部刻度线
g.DrawString(scaleValue.ToString(), font, brush, i - 5, 10); // 顶部刻度值
scaleValue -= 5;
}
// 绘制左侧刻度线
// 假设你想让刻度值从 0 开始，每条刻度线增加 1
int leftScaleValue = 0;
for (int i = height / 2; i <= height; i += gridSize)
{
g.DrawLine(axisPen, 0, i, 5, i); // 左侧刻度线
g.DrawString(leftScaleValue.ToString(), font, brush, 10, i - 5); // 左侧刻度值
leftScaleValue -= 5;
}
leftScaleValue = 5;
for (int i = height / 2 - gridSize; i >= 0; i -= gridSize)
{
g.DrawLine(axisPen, 0, i, 5, i); // 左侧刻度线
g.DrawString(leftScaleValue.ToString(), font, brush, 10, i - 5); // 左侧刻度值
leftScaleValue += 5;
}
//刻度线边缘线
Pen sige_Pen = new Pen(Color.Black, 2);
sige_Pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Solid; // 设置为实线
g.DrawLine(sige_Pen, 0, 0, width,0);
g.DrawLine(sige_Pen, 0, 0, 0, height);
g.DrawLine(sige_Pen, width, 0, width, height);
g.DrawLine(sige_Pen, 0, height, width, height);
}
private void pictureBox1_Click(object sender, EventArgs e)
{
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
}
//鼠标移动事件
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
// 计算鼠标相对于中心点的偏移量(原点)
int centerX = pictureBox1.Width / 2;
int centerY = pictureBox1.Height / 2;
// 获取相对中心点的偏移量并根据缩放级别进行调整
float gridX = ((e.X - centerX) * zoomLevel / 15)*5;
float gridY = ((centerY - e.Y) * zoomLevel / 15)*5;
// 显示当前的网络坐标
textBox1.Text = $"X: {gridX:F2}, Y: {gridY:F2}";
}
private void pictureBox1_MouseDown_1(object sender, MouseEventArgs e)
{
}
}
}
