再参考 //http://blog.csdn.net/lengyuewuhen/ using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Drawing.Drawing2D;namespace GDI_练习 { /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { public System.Windows.Forms.PictureBox pictureBox1; private Point p1 = Point.Empty, p2 = Point.Empty; private bool isMouseDown = false, isMouseUp = false;
ArrayList addArray = new ArrayList(); public struct SharpType { public string type; public Point p1, p2; public Color foreColor, backColor; public Brush brush; public SharpType( string type, Point p1, Point p2, Color foreColor, Color backColor, Brush brush ) { this.type = type; this.p1 = p1; this.p2 = p2; this.foreColor = foreColor; this.backColor = backColor; this.brush = brush; } } /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // 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.pictureBox1 = new System.Windows.Forms.PictureBox(); this.SuspendLayout(); // // pictureBox1 // this.pictureBox1.BackColor = System.Drawing.Color.White; this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill; this.pictureBox1.Location = new System.Drawing.Point(0, 0); this.pictureBox1.Name = "pictureBox1"; this.pictureBox1.Size = new System.Drawing.Size(432, 397); this.pictureBox1.TabIndex = 0; this.pictureBox1.TabStop = false; this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint); this.pictureBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseUp); this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseMove); this.pictureBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseDown); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(432, 397); this.Controls.Add(this.pictureBox1); this.Name = "Form1"; this.Text = "Form1"; 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 pictureBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { if( ! isMouseUp ) { this.isMouseDown = true; this.p1 = new Point( e.X, e.Y ); }
http://www.csharpproject.com/articles/winforms/general/rolepanel.aspx
//http://blog.csdn.net/lengyuewuhen/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;namespace GDI_练习
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
public System.Windows.Forms.PictureBox pictureBox1;
private Point p1 = Point.Empty, p2 = Point.Empty;
private bool isMouseDown = false, isMouseUp = false;
ArrayList addArray = new ArrayList();
public struct SharpType
{
public string type;
public Point p1, p2;
public Color foreColor, backColor;
public Brush brush;
public SharpType( string type, Point p1, Point p2, Color foreColor, Color backColor, Brush brush )
{
this.type = type;
this.p1 = p1;
this.p2 = p2;
this.foreColor = foreColor;
this.backColor = backColor;
this.brush = brush;
} } /// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// 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.pictureBox1 = new System.Windows.Forms.PictureBox();
this.SuspendLayout();
//
// pictureBox1
//
this.pictureBox1.BackColor = System.Drawing.Color.White;
this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.pictureBox1.Location = new System.Drawing.Point(0, 0);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(432, 397);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
this.pictureBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseUp);
this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseMove);
this.pictureBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseDown);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(432, 397);
this.Controls.Add(this.pictureBox1);
this.Name = "Form1";
this.Text = "Form1";
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 pictureBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if( ! isMouseUp )
{
this.isMouseDown = true;
this.p1 = new Point( e.X, e.Y );
}
} private void pictureBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
Graphics g = this.pictureBox1.CreateGraphics();
if( isMouseDown && p2 != Point.Empty )
g.DrawEllipse( Pens.White, p1.X, p1.Y, Math.Abs( p1.X - p2.X ), Math.Abs( p1.Y - p2.Y ) );
if( isMouseDown && ! isMouseUp )
{
p2 = new Point( e.X, e.Y );
g.DrawEllipse( Pens.Black, p1.X, p1.Y, Math.Abs( p1.X - p2.X ), Math.Abs( p1.Y - p2.Y ) ); }
foreach( SharpType type in addArray )
{
g.DrawEllipse( Pens.Black, type.p1.X, type.p1.Y, Math.Abs( type.p1.X - type.p2.X ), Math.Abs( type.p1.Y - type.p2.Y ) ); }
g.Dispose();
} private void pictureBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
this.isMouseDown = false;
p2 = new Point( e.X, e.Y );
Graphics g = this.pictureBox1.CreateGraphics();
g.DrawEllipse( Pens.Black, p1.X, p1.Y, Math.Abs( p1.X - p2.X ), Math.Abs( p1.Y - p2.Y ) );
addArray.Add( new SharpType( "a", p1, p2, Color.Black, Color.Empty, Brushes.Black ) );
p1 = Point.Empty;
p2 = Point.Empty;
g.Dispose();
} private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
foreach( SharpType type in addArray )
{
e.Graphics.DrawEllipse( Pens.Black, type.p1.X, type.p1.Y, Math.Abs( type.p1.X - type.p2.X ), Math.Abs( type.p1.Y - type.p2.Y ) ); }
}
}
}