Flex中的TextInput （4）：控件化

让前面的代码形成TextInput控件。

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TextInputComponent.as

package {
	import Component.MyTextInput;	
	import flash.display.Sprite;

	public class TextInputComponent extends Sprite
	{
		public function TextInputComponent()
		{
			var txt1:MyTextInput = new MyTextInput(100,100,200,20);
			addChild(txt1);
			
			var txt2:MyTextInput = new MyTextInput(100,130,300,15);
			addChild(txt2);
			
		}
	}
}

MyTextInput.as

package Component
{
	import flash.display.Sprite;
	import flash.text.TextField;
	import flash.text.TextFieldType;
	import skins.Border;

	public class MyTextInput extends Sprite
	{
		private var _w:int;
		private var _h:int;
		private var _x:int;
		private var _y:int;
		
		public function MyTextInput(x:int,y:int,width:int,height:int)
		{
			_x = x;
			_y = y;
			_w = width;
			_h = height;
			CreateChild();
		}
		
		public function CreateChild():void{
			//添加3D边框
			var border:Border = new Border(_x,_y,_w,_h);
			addChild(border);
			
			//添加TextField
			var txt:TextField = new TextField();
			txt.type = TextFieldType.INPUT;
			txt.x = _x + 1;
			txt.y = _y + 1;
			txt.width = _w-2;
			txt.height = _h-2;
			txt.background = true;
			txt.backgroundColor = 0xffffff;
			addChild(txt);
		}
	}
}

Border.as

注意：由于边框是背景效果，所以基类改为Shape，保证永远位于文本框的后面。

package skins
{
	import flash.display.Graphics;
	import flash.display.Shape;
	
	import mx.utils.ColorUtil;

	public class Border extends Shape
	{
		//定义高度和宽度
		private var _w:int;
		private var _h:int;
		private var _x:int;
		private var _y:int;
		
		public function Border(x:int,height:int)
		{
			_x = x;
			_y = y;
			_w = width;
			_h = height;
			drawBorder();
		}
		
		public function drawBorder():void
		{
			//定义边框颜色
			var borderColor:uint;
			var borderColorDrk1:uint
			var borderColorDrk2:uint
			var borderColorLt1:uint	
			var borderInnerColor:uint;
			
			//设定边框颜色
			borderColor = 0xb7babc;		
			borderColorDrk1 =
				ColorUtil.adjustBrightness2(borderColor,-40);
			borderColorDrk2 =
				ColorUtil.adjustBrightness2(borderColor,+25);
			borderColorLt1 = 
				ColorUtil.adjustBrightness2(borderColor,+40);				
			borderInnerColor = 0xffffff;

			//画出3D边框效果
			draw3dBorder(borderColorDrk2,borderColorDrk1,borderColorLt1,Number(borderInnerColor),Number(borderInnerColor));

		}
	
		public function draw3dBorder(c1:Number,c2:Number,c3:Number,c4:Number,c5:Number,c6:Number):void
		{
			var g:Graphics = graphics;
			g.clear();
			
			// outside sides
			g.beginFill(c1);
			g.drawRect(_x,_h);
			g.drawRect(_x+1,_w - 2,_h);
			g.endFill();
			
			// outside top
			g.beginFill(c2);
			g.drawRect(_x+1,1);
			g.endFill();
			
			// outside bottom
			g.beginFill(c3);
			g.drawRect(_x+1,_y + _h - 1,1);
			g.endFill();
			
			// inside top
			g.beginFill(c4);
			g.drawRect(_x+1,_y+1,1);
			g.endFill();
			
			// inside bottom
			g.beginFill(c5);
			g.drawRect(_x+1,_y + _h - 2,1);
			g.endFill();
			
			// inside sides
			g.beginFill(c6);
			g.drawRect(_x+1,_y+2,_h - 4);
			g.drawRect(_x+2,_w - 4,_h - 4);
			g.endFill();
		}
	}
}

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效果图：