as 3 绘图板示例与组件使用实例

package
{
import flash.display.sprite;
import flash.events.mouseevent;

public class classgraphics extends sprite
{
  private var mysprite:sprite;

  // 构造函数
  public function classgraphics()
  {
   this.mysprite = new sprite();
   addchild(this.mysprite);
   this.mysprite.graphics.beginfill(0x336699);
   this.mysprite.graphics.drawrect(0, 0, 550, 400);
   this.mysprite.graphics.endfill();
   this.mysprite.addeventlistener(mouseevent.mouse_down, spritemousedown);
   this.mysprite.addeventlistener(mouseevent.mouse_up, spritemouseup);
  }

  // 鼠标按下事件
  private function spritemousedown(event:mouseevent):void
  {
   this.mysprite.graphics.linestyle(1, 0, 1);
   this.mysprite.graphics.moveto(mou易做图, mousey);
   this.mysprite.addeventlistener(mouseevent.mouse_move, spritemousemove);
  }

  // 鼠标离开事件
  private function spritemouseup(event:mouseevent):void
  {
   this.mysprite.removeeventlistener(mouseevent.mouse_move, spritemousemove);
  }

  // 移动事件
  private function spritemousemove(event:mouseevent):void
  {
   this.mysprite.graphics.lineto(mou易做图, mousey);
  }
}
}

组件使用

package com
{
import flash.display.sprite;
import flash.events.mouseevent;
import flash.display.stagescalemode;
import flash.display.stagealign;
import fl.controls.label;
import fl.controls.textinput;
import fl.controls.textarea;
import fl.controls.button;

public class classmain extends sprite
{
  private var username:textinput;
  private var usernamelabel:label;
  private var message:textarea;
  private var messagelabel:label;
  private var button:button;

  // 构造函数
  public function classmain()
  {
   stage.scalemode = "noscale";
   stage.align = stagealign.top_left;

   this.initmc();
  }

  // 一点准备工作
  private function initmc():void
  {
   this.username = new textinput();
   addinput(this.username, "username", 50, 10, 200, 18);

   this.usernamelabel = new label();
   addlabel(this.usernamelabel, "呢称:", 10, 10, 40, 18);

   this.message = new textarea();
   addtextarea(this.message, "message", 50, 40, 400, 100);

   this.messagelabel = new label();
   addlabel(this.messagelabel, "留言:", 10, 40, 40, 18);

   this.button = new button();
   addbutton(this.button, "提交", 350, 150);
  }

  // 创建label
  private function addlabel(label:label, text:string, x:uint, y:uint, width:uint, height:uint):void
  {
   label.text = text;
   label.move(x, y);
   label.setsize(width, height);
   addchild(label);
  }

  // 创建文本框
  private function addinput(input:textinput, name:string, x:uint, y:uint, width:uint, height:uint):void
  {
   input.name = name;
   input.move(x, y);
   input.setsize(width, height);
   addchild(input);
  }

  // 创建文本域
  private function addtextarea(textarea:textarea, name:string, x:uint, y:uint, width:uint, height:uint):void
  {
   textarea.name = name;
   textarea.move(x, y);
   textarea.setsize(width, height);
   textarea.condensewhite = true;
   addchild(textarea);
  }

  // 创建按钮
  private function addbutton(button:button, value:string, x:uint, y:uint):void
  {
   button.label= value;
   button.move(x, y);
   addchild(button);
  }
}

}

补充：flash教程,As3.0