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：

看的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一下特殊处理，直接返回告警的颜色

function(sourceColor:uint, filterColor:uint):uint {
	if(sourceColor == s && (filterColor == AlarmSeverity.MAJOR.color ||
		filterColor == AlarmSeverity.MINOR.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;
};

　　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>