Flex中的TextInput （4）：控件化

最新推荐文章于 2016-11-20 16:36:31 发布

tiangej

最新推荐文章于 2016-11-20 16:36:31 发布

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分类专栏： Flex组件文章标签： flex border function import class c

本文链接：https://blog.youkuaiyun.com/tiangej/article/details/7561438

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本文介绍了一个使用ActionScript实现的自定义TextInput控件。该控件包含3D边框效果，并通过子类化Sprite和TextField来创建输入框。文中详细展示了如何设置文本框的位置、大小及样式。

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让前面的代码形成TextInput控件。

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,y:int,width: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), 
						 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, _y, _w, _h);
			g.drawRect(_x+1, _y, _w - 2, _h);
			g.endFill();
			
			// outside top
			g.beginFill(c2);
			g.drawRect(_x+1, _y, _w - 2, 1);
			g.endFill();
			
			// outside bottom
			g.beginFill(c3);
			g.drawRect(_x+1, _y + _h - 1, _w - 2, 1);
			g.endFill();
			
			// inside top
			g.beginFill(c4);
			g.drawRect(_x+1, _y+1, _w - 2, 1);
			g.endFill();
			
			// inside bottom
			g.beginFill(c5);
			g.drawRect(_x+1, _y + _h - 2, _w - 2, 1);
			g.endFill();
			
			// inside sides
			g.beginFill(c6);
			g.drawRect(_x+1, _y+2, _w - 2, _h - 4);
			g.drawRect(_x+2, _y+2, _w - 4, _h - 4);
			g.endFill();
		}
	}
}

效果图：