自定义Flex ToolTip 的样式

 mx|ToolTip
      {
          borderStyle:ClassReference("myBorder");

      }

 

查看ToolTipBorder这个类的updateDisplayList（），可以得知通过设置borderStyle为自定义的Border类，可以继承

ToolTipBorder， 或模仿重写一下.

 

ToolTipBorder的源码
 
override protected function updateDisplayList(w:Number, h:Number):void
	{	
		super.updateDisplayList(w, h);

		var borderStyle:String = getStyle("borderStyle");
		var backgroundColor:uint = getStyle("backgroundColor");
		var backgroundAlpha:Number= getStyle("backgroundAlpha");
		var borderColor:uint = getStyle("borderColor");
		var cornerRadius:Number = getStyle("cornerRadius");

		var g:Graphics = graphics;
		g.clear();
		
		filters = [];
                
                //主要是这里的代码
		switch (borderStyle)
		{
			case "none":
			{
				// Don't draw anything
				break;
			}
			case "errorTipRight":
			{
				// border 
				drawRoundRect(
					11, 0, w - 11, h - 2, 3,
					borderColor, backgroundAlpha); 

				// left pointer 
				g.beginFill(borderColor, backgroundAlpha);
				g.moveTo(11, 7);
				g.lineTo(0, 13);
				g.lineTo(11, 19);
				g.moveTo(11, 7);
				g.endFill();
				
				filters = [ new DropShadowFilter(2, 90, 0, 0.4) ];
				break;
			}
			
			case "errorTipAbove":
			{
				// border 
				drawRoundRect(
					0, 0, w, h - 13, 3,
					borderColor, backgroundAlpha); 

				// bottom pointer 
				g.beginFill(borderColor, backgroundAlpha);
				g.moveTo(9, h - 13);
				g.lineTo(15, h - 2);
				g.lineTo(21, h - 13);
				g.moveTo(9, h - 13);
				g.endFill();

				filters = [ new DropShadowFilter(2, 90, 0, 0.4) ];
				break;
			}

			case "errorTipBelow":
			{
				// border 
				drawRoundRect(
					0, 11, w, h - 13, 3,
					borderColor, backgroundAlpha); 

				// top pointer 
				g.beginFill(borderColor, backgroundAlpha);
				g.moveTo(9, 11);
				g.lineTo(15, 0);
				g.lineTo(21, 11);
				g.moveTo(10, 11);
				g.endFill();
				
				filters = [ new DropShadowFilter(2, 90, 0, 0.4) ];
				break;
			}

			default: //Tooltip
			{
				// face
				drawRoundRect(
					3, 1, w - 6, h - 4, cornerRadius,
					backgroundColor, backgroundAlpha) 
				
				if (!dropShadow)
					dropShadow = new RectangularDropShadow();

				dropShadow.distance = 3;
				dropShadow.angle = 90;
				dropShadow.color = 0;
				dropShadow.alpha = 0.4;

				dropShadow.tlRadius = cornerRadius + 2;
				dropShadow.trRadius = cornerRadius + 2;
				dropShadow.blRadius = cornerRadius + 2;
				dropShadow.brRadius = cornerRadius + 2;

				dropShadow.drawShadow(graphics, 3, 0, w - 6, h - 4);

				break;
			}
		}
	}

 

重写可参考

http://flexonblog.wordpress.com/2008/08/19/design-your-own-tooltipborder-in-flexcustom-tooltipborder-in-flexwith-example/

这里还有个Demo 演示