自定义告警染色
在TWaver中，拓扑上的告警呈现的方式是多种多样的，最常见、最通用的是在原来的图片上叠加上告警级别所对应的颜色，这种方式在TWaver的各个分支版本中都是支持的，呈现效果如下图所示：
另外还有两种是将告警颜色添加在网元的前景或背景上，效果如下：
我们主要来看默认的渲染方式，这种方式是采取图片颜色叠加处理，也就是在原来网元的图片上叠加上告警的颜色，对于大部分的图片来说是没有什么问题的，比如任意从网上找两种图片进行告警渲染：
看得出来效果还是可以的，两张图片的染色都没有保持着告警的颜色。但有些图片的渲染就不是那么让人满意了，从客户那边取过来一个icon图片做了一下测试，结果发现：
图中对于Major，Minor和custom这三种级别的告警渲染的颜色和冒泡的颜色显然有些不同。对于这种情况该如何处理呢，经查阅API获得TWaver可以自定义告警染色的规则，默认采用了Defaults中的PIXEL_FILTER_FUNCTION，我们来看看默认的实现：
function(sourceColor:uint, filterColor:uint):uint { var r:uint = (sourceColor >> 16 ) & 0xFF; var g:uint = (sourceColor >> 8 ) & 0xFF; var b:uint = sourceColor & 0xFF; sourceColor = (r * 77 + g * 151 + b * 28) >> 8; sourceColor = (sourceColor << 16) | (sourceColor << 8 ) | sourceColor; return sourceColor & filterColor; }有了这个方法之后，我们就可以对其进行定制，可以将这三种颜色进行特殊处理，直接返回告警的颜色：
运行后再来看看效果：
最新附上完整的代码供大家参考：
<?xml version="1.0" encoding="utf-8"?> <mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:twaver="http://www.servasoftware.com/2009/twaver/flex" width="100%" height="100%" creationComplete="init()" backgroundColor="#FFFFFF" > <mx:Script> <![CDATA[ import twaver.AlarmSeverity; import twaver.Defaults; import twaver.Node; import twaver.Utils; import twaver.Consts; import twaver.Styles; [Embed(source="/image/BTSGroup.png")] private static var bts:Class; [Embed(source="/image/network_server.png")] private static var wireless:Class; private static var customAlarmSeverity:AlarmSeverity = AlarmSeverity.register(3, 'custom', 'custom', 0xE4DC8A); private function init():void { var s:uint = (162 << 16 ) | (193 << 8 ) | 210; Utils.registerImageByClass('bts', bts); Utils.registerImageByClass('wireless', wireless); twaver.Defaults.PIXEL_FILTER_FUNCTION = function(sourceColor:uint, filterColor:uint):uint { if(sourceColor == s && (filterColor == AlarmSeverity.MAJOR.color || filterColor == AlarmSeverity.MINOR.color || filterColor == customAlarmSeverity.color)) { return filterColor; } var r:uint = (sourceColor >> 16 ) & 0xFF; var g:uint = (sourceColor >> 8 ) & 0xFF; var b:uint = sourceColor & 0xFF; sourceColor = (r * 77 + g * 151 + b * 28 ) >> 8; sourceColor = (sourceColor << 16 ) | (sourceColor << 8 ) | sourceColor; return sourceColor & filterColor; }; addNode(AlarmSeverity.CRITICAL, 220, 100,'bts'); addNode(AlarmSeverity.MAJOR, 340, 100,'bts'); addNode(AlarmSeverity.MINOR, 460, 100,'bts'); addNode(AlarmSeverity.WARNING, 580, 100,'bts'); addNode(AlarmSeverity.INDETERMINATE, 700, 100,'bts'); addNode(AlarmSeverity.CRITICAL, 220, 250,'wireless'); addNode(AlarmSeverity.MAJOR, 340, 250,'wireless'); addNode(AlarmSeverity.MINOR, 460, 250,'wireless'); addNode(AlarmSeverity.WARNING, 580, 250,'wireless'); addNode(AlarmSeverity.INDETERMINATE, 700, 250,'wireless'); } private function addNode(alarmSeverity:AlarmSeverity, x:Number, y:Number,image):void { var node:Node = new Node(); node.image = image; if(image == "bts"){ node.setStyle(Styles.INNER_STYLE, Consts.INNER_STYLE_SHAPE); node.setStyle(Styles.INNER_SHAPE, Consts.SHAPE_CIRCLE); node.setStyle(Styles.INNER_GRADIENT, Consts.GRADIENT_RADIAL_CENTER); node.setStyle(Styles.INNER_GRADIENT_ALPHA, 0.5); node.setStyle(Styles.INNER_ALPHA, 0.8); node.setStyle(Styles.INNER_PADDING, -6); node.setStyle(Styles.INNER_BACK, false); }else if(image == "wireless"){ node.setStyle(Styles.INNER_STYLE, Consts.INNER_STYLE_SHAPE); node.setStyle(Styles.INNER_SHAPE, Consts.SHAPE_DIAMOND); node.setStyle(Styles.INNER_GRADIENT, Consts.GRADIENT_RADIAL_SOUTHWEST); node.setStyle(Styles.INNER_PADDING_TOP, 10); node.setStyle(Styles.INNER_PADDING_BOTTOM, -5); node.setStyle(Styles.INNER_PADDING_LEFT, -20); node.setStyle(Styles.INNER_PADDING_RIGHT, -20); } node.name = alarmSeverity.name ; node.location = new Point(x, y); node.alarmState.setNewAlarmCount(alarmSeverity, 22); network.elementBox.add(node); } ]]> </mx:Script> <twaver:Network id="network" width="100%" height="100%" /> </mx:HBox>