using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D ;
namespace V19.__GDI_plus绘图基础
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//Graphics
//创建Graphics对象的三种方式
// Paint 事件的 PaintEvenlArgs中的 Graphics对象
// 从Image创建 Graphics 对象
//用CreateGraphics 方法创建Graphics 对象
// Pen 钢笔
//Pen 类位于System.Drawing
//使用GDI 中的pan 类创建钢笔,在创建钢笔时 可以为其定义线条宽度 width 和 颜色 color 属性
// Pen p=new Pen(Color.White,1)
//Brush 笔刷
//SolidBrush 填充
//TextureBrush 使用基于光栏的图像
//LinearGradientBrush 使用颜色渐变填充图形
//pathGeadientBrsh 使用颜色渐变填充图形
//HatchBrush 使用各类图案填充图形
private void Form1_Paint(object sender, PaintEventArgs e)
{
//Graphics g1 = e.Graphics;
////创建一个 Image对象
//Bitmap imgTmp = new Bitmap(200,200);
//Graphics g2 = Graphics.FromImage(imgTmp);
//Graphics g3 = this.CreateGraphics();
//MessageBox.Show("Graphics 对象");
// Pen 钢笔 用于储存线条属性 宽度 颜色等
//Graphics g = e.Graphics;
//Pen p = new Pen(Color.Blue ,2);
// // 0 80 矩形的起始点 28 长 120高
//g.DrawEllipse(p, 0, 80, 280, 120);
//g.Dispose();
// 填充
//Graphics g = e.Graphics;
//Brush bh = new SolidBrush(Color.Black );
//g.FillEllipse(bh ,0,80,280,120);
//g.Dispose();
//Brush 笔刷 填充图形
//string path = @"D:\VS Projects\控制台应用程序\V19.0 GDI plus绘图基础\img\center.jpg";
//Graphics g = e.Graphics;
//Bitmap img;
//if (File.Exists(path))
//{
// img = new Bitmap(path);
// Brush br = new TextureBrush(img);
// g.FillEllipse(br, 0, 80, 280, 120);
//}
//g.Dispose();
//3 LinearGradientBrush 线性渐变填充
//Graphics g = e.Graphics;
////
//LinearGradientBrush lgb = new LinearGradientBrush(new Point (0,80),new Point (280,120),Color.Black ,Color .Red );
//g.FillEllipse(lgb ,0,80,280,120);
//lgb.Dispose();
//g.Dispose();
//4 PathGradientBrush 圆形渐变
//GraphicsPath gp = new GraphicsPath();
//gp.AddEllipse(0,80,280,120); // 添加椭圆
//PathGradientBrush pgb = new PathGradientBrush(gp); //圆形渐变
//pgb.CenterColor = Color.FromArgb(255,255,0,0); //中心颜色
//Color[] colors ={ Color.FromArgb(255, 0, 255, 0) };
//pgb.SurroundColors =colors ; //环绕颜色
//e.Graphics.FillEllipse (pgb ,0,80,280,120);
//pgb.Dispose();
//gp.Dispose();
//5 HatchBrush 阴影图案
//HatchBrush hb = new HatchBrush(HatchStyle.HorizontalBrick ,Color.Red ,Color.White );
//e.Graphics.FillEllipse(hb ,0,80,280,120);
//hb.Dispose();
// DrawRectangle矩形
//Graphics g1 = e.Graphics;
//Pen p1 = new Pen(Color.Green, 3);
//g1.DrawRectangle(p1, 100, 10, 260, 200);
//g1.Dispose();
//p1.Dispose();
//三角形 DrawPolygon多边
//Graphics g = e.Graphics;
//Pen p = new Pen(Color.Green, 3);
//Point[] pg ={new Point ( 0,76),
// new Point (80,76),
// new Point (106,0) };
//g.DrawPolygon(p,pg );
//g.Dispose();
//p.Dispose();
//五角形 DrawPolygon多边 10个点
//Graphics g = e.Graphics;
//Pen p = new Pen(Color.Green, 3);
//Point[] pg ={
// new Point ( 0,76),
// new Point (80,76),
// new Point (106,0) ,
// new Point ( 130,76),
// new Point (210,75),
// new Point (146,124) ,
// new Point (170,200),
// new Point (106,152),
// new Point (40,200),
// new Point ( 66,124)
//};
//g.DrawPolygon(p, pg);
//g.Dispose();
//p.Dispose();
//绘制基本图形之椭圆、弧和 扇形
//Graphics g = e.Graphics;
//Pen p = new Pen(Color.Cyan, 3);
//g.DrawEllipse(p, 0, 50, 300, 120); //椭圆 线
//g.DrawArc(p, 0, 50, 200, 200, 0, 120); //弧
////startangle 从X轴开始沿顺时针 方向旋转的角度
////sweepangle 从起始角开始到弧线的结束点沿 顺时针方向角度的角 （以度为单位）
//g.DrawPie(p, 0, 200, 300, 200, 50, 90); //扇形
//g.Dispose();
//p.Dispose();
//3D 效果
int width = 200;
int height = 200;
int x = 50;
int y = 20;
Graphics g = e.Graphics;
Rectangle r = new Rectangle(x,y,width,height ); //一组数组 标示矩形
Pen p = new Pen(Color.Gray); // 线条
//for (int i = y; i < 3 * y; i++)
//{ //不断创建 画椭圆 重叠 造成阴影
// Rectangle tempR = new Rectangle(x, i, width, height); //一组数组 标示矩形
// g.DrawEllipse(p,tempR ); //画椭圆
//}
//背景椭圆
Brush b = new SolidBrush(Color.Gainsboro );
g.FillPie(b, r, 0, 360);
//扇形 1
b = new SolidBrush(Color.Blue );
g.FillPie(b, r, 0, 60);
////扇形 2
b = new SolidBrush(Color.Yellow);
g.FillPie(b, r, 210, 150);
////扇形 3
//b = new SolidBrush(Color.Red );
//g.FillPie(b, r, 0, 60);
b.Dispose();
g.Dispose();
}
private void Form1_Load(object sender, EventArgs e)
{
}
//更改背景颜色
private void button2_Click(object sender, EventArgs e)
{
if (colorDialog1.ShowDialog() == DialogResult.OK)
{
this.BackColor = colorDialog1.Color;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (fontDialog1.ShowDialog() == DialogResult.OK) {
textBox1.Font = fontDialog1.Font;
}
}
}
}
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