form1.cs

一个简单画布的实现,java开发!包括JAVA原代码和设计要求说明书.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace MyDraw
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Panel panel1;
		private System.Drawing .Pen  p;
		private System.Drawing .Graphics g;
		private int ax,ay,bx,by;
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem2;
		private System.Windows.Forms.ColorDialog colorDialog1;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.MenuItem menuItem5;
		private System.Windows.Forms.MenuItem menuItem6;
		private System.Windows.Forms.MenuItem menuItem7;
		private System.Windows.Forms.MenuItem menuItem8;
		private System.Windows.Forms.MenuItem menuItem9;
		private System.Windows.Forms.OpenFileDialog openFileDialog1;
		private System.Windows.Forms.SaveFileDialog saveFileDialog1;
		private System.Windows.Forms.ImageList imageList1;
		private System.Windows.Forms.ToolBar toolBar1;
		private System.Windows.Forms.ToolBarButton toolBarButton1;
		private System.Windows.Forms.ToolBarButton toolBarButton2;
		private System.Windows.Forms.ToolBarButton toolBarButton3;
		private System.Windows.Forms.PictureBox pictureBox1;
		private System.Windows.Forms.MenuItem menuItem10;
		private System.ComponentModel.IContainer components;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
			p=new Pen (Color.Blue ,3);
			//g=this.panel1.CreateGraphics ();
			g= Graphics.FromImage( pictureBox1.Image );
			g.Clear( Color.White );

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.panel1 = new System.Windows.Forms.Panel();
			this.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.menuItem8 = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem6 = new System.Windows.Forms.MenuItem();
			this.menuItem9 = new System.Windows.Forms.MenuItem();
			this.menuItem7 = new System.Windows.Forms.MenuItem();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItem10 = new System.Windows.Forms.MenuItem();
			this.colorDialog1 = new System.Windows.Forms.ColorDialog();
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
			this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
			this.imageList1 = new System.Windows.Forms.ImageList(this.components);
			this.toolBar1 = new System.Windows.Forms.ToolBar();
			this.toolBarButton1 = new System.Windows.Forms.ToolBarButton();
			this.toolBarButton2 = new System.Windows.Forms.ToolBarButton();
			this.toolBarButton3 = new System.Windows.Forms.ToolBarButton();
			this.panel1.SuspendLayout();
			this.SuspendLayout();
			// 
			// panel1
			// 
			this.panel1.BackColor = System.Drawing.SystemColors.ControlLightLight;
			this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.panel1.Controls.Add(this.pictureBox1);
			this.panel1.Location = new System.Drawing.Point(56, 32);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(448, 232);
			this.panel1.TabIndex = 0;
			this.panel1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseMove);
			this.panel1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown);
			// 
			// pictureBox1
			// 
			this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
			this.pictureBox1.Location = new System.Drawing.Point(0, 0);
			this.pictureBox1.Name = "pictureBox1";
			this.pictureBox1.Size = new System.Drawing.Size(456, 240);
			this.pictureBox1.TabIndex = 0;
			this.pictureBox1.TabStop = false;
			this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseMove);
			this.pictureBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown);
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem3,
																					  this.menuItem1});
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 0;
			this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem4,
																					  this.menuItem8,
																					  this.menuItem5,
																					  this.menuItem6,
																					  this.menuItem9,
																					  this.menuItem7});
			this.menuItem3.Text = "菜单";
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 0;
			this.menuItem4.Text = "新建";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// menuItem8
			// 
			this.menuItem8.Index = 1;
			this.menuItem8.Text = "-";
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 2;
			this.menuItem5.Text = "打开";
			this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
			// 
			// menuItem6
			// 
			this.menuItem6.Index = 3;
			this.menuItem6.Text = "保存";
			this.menuItem6.Click += new System.EventHandler(this.menuItem6_Click);
			// 
			// menuItem9
			// 
			this.menuItem9.Index = 4;
			this.menuItem9.Text = "-";
			// 
			// menuItem7
			// 
			this.menuItem7.Index = 5;
			this.menuItem7.Text = "退出";
			this.menuItem7.Click += new System.EventHandler(this.menuItem7_Click);
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 1;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem2,
																					  this.menuItem10});
			this.menuItem1.Text = "fun";
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 0;
			this.menuItem2.Text = "change color";
			this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
			// 
			// menuItem10
			// 
			this.menuItem10.Index = 1;
			this.menuItem10.Text = "修改画笔宽度";
			this.menuItem10.Click += new System.EventHandler(this.menuItem10_Click);
			// 
			// saveFileDialog1
			// 
			this.saveFileDialog1.Filter = ".bmp(位图)|*.bmp";
			// 
			// imageList1
			// 
			this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
			this.imageList1.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream")));
			this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// toolBar1
			// 
			this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
																						this.toolBarButton1,
																						this.toolBarButton2,
																						this.toolBarButton3});
			this.toolBar1.DropDownArrows = true;
			this.toolBar1.ImageList = this.imageList1;
			this.toolBar1.Location = new System.Drawing.Point(0, 0);
			this.toolBar1.Name = "toolBar1";
			this.toolBar1.ShowToolTips = true;
			this.toolBar1.Size = new System.Drawing.Size(584, 28);
			this.toolBar1.TabIndex = 1;
			this.toolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar1_ButtonClick);
			// 
			// toolBarButton1
			// 
			this.toolBarButton1.ImageIndex = 0;
			// 
			// toolBarButton2
			// 
			this.toolBarButton2.ImageIndex = 1;
			// 
			// toolBarButton3
			// 
			this.toolBarButton3.ImageIndex = 2;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(584, 300);
			this.Controls.Add(this.toolBar1);
			this.Controls.Add(this.panel1);
			this.Menu = this.mainMenu1;
			this.Name = "Form1";
			this.Text = "Form1";
			this.panel1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void panel1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{ 
			this.ax =e.X ;
			this.ay =e.Y ;
		
		}

		private void panel1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(e.Button ==MouseButtons.Left )
			{
				bx=e.X ;
				by=e.Y ;
				g.DrawLine (p,ax,ay,bx,by);
				ax=bx;
				ay=by;
			}
			pictureBox1.Invalidate();
		}

		private void menuItem2_Click(object sender, System.EventArgs e)
		{ 
			if (this.colorDialog1 .ShowDialog() == DialogResult.OK)
			{
				//newclr = colorDialog1  .Color;
				//p=new Pen (newclr,3);
				//设置画笔的颜色
				p.Color = colorDialog1  .Color;
			}
		}

		private void menuItem4_Click(object sender, System.EventArgs e)
		{
			//清除画布
			g.Clear( Color.White );
			pictureBox1.Invalidate();
		}

		private void menuItem6_Click(object sender, System.EventArgs e)
		{
			//保存对话框，用来保存文件
			if( saveFileDialog1.ShowDialog() == DialogResult.OK )
			{
				//利用Image类的Save函数来保存文件
				pictureBox1.Image.Save( saveFileDialog1.FileName );
			}
		}

		private void menuItem7_Click(object sender, System.EventArgs e)
		{
			//退出程序
			this.Close();
		}

		private void menuItem5_Click(object sender, System.EventArgs e)
		{
			//调用打开文件对话框
			if( openFileDialog1.ShowDialog() == DialogResult.OK )
			{
				g.DrawImage( Image.FromFile( openFileDialog1.FileName ), 0, 0 );
			}
		}

		private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			//处理工具栏按钮事件
			if( e.Button == toolBarButton1 )
			{
				//打开文件
				menuItem5_Click( sender, e );
			}
			else if( e.Button == toolBarButton2 )
			{
				//保存文件
				menuItem6_Click( sender, e );
			}
			else if( e.Button == toolBarButton3 )
			{
				//新建
				menuItem4_Click( sender, e );
			}
		}

		private void menuItem10_Click(object sender, System.EventArgs e)
		{
			//探出设置画笔的属性对话框
			penAttForm penAtt = new penAttForm();
			penAtt.ShowDialog();

			p.Width = penAttForm.nPenWidth;
		}
	}
}