MobileTrader/src/charts/RealTimeChart.mxml

<?xml version="1.0" encoding="utf-8"?>
<!--

  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

-->
<!-- Christophe Coenraets, http://coenraets.org -->
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009" 
		 xmlns:s="library://ns.adobe.com/flex/spark">

	<fx:Script>
		<![CDATA[

			import model.Stock;
			
			import mx.binding.utils.ChangeWatcher;
			import mx.collections.ArrayCollection;
			
			[Bindable]
			public var _stock:Stock;
			
			[Bindable] protected var minValue:Number;
			[Bindable] protected var maxValue:Number;
			
			protected var minTime:Number;
			protected var maxTime:Number;
			
			protected var changeWatcher:ChangeWatcher;
			
			public function set stock(stock:Stock):void
			{
				_stock = stock;
				changeWatcher = ChangeWatcher.watch(_stock, "last", drawChart, false, true);
				callLater(drawChart);
			}
			
			public function drawChart(e:Event=null):void
			{
				var history:ArrayCollection = _stock.history;
				minValue = history[0].last;
				maxValue = history[0].last;
				var i:int;
				for (i=1; i<history.length; i++)
				{
					if (history[i].last < minValue) minValue = history[i].last;
					if (history[i].last > maxValue) maxValue = history[i].last;
				}
				
				var pathData:String = "";
				
				var length:int = history.length;				
				
				for (i=0; i<length; i++)
				{
					var yPos:Number = width - (history[i].last - minValue) / (maxValue - minValue) * width;
					var xPos:Number = (i - 0) / (length - 1) * width;
					pathData += (i==0 ? "M " : " L ") + xPos + " " + yPos;
				}
				path.data = pathData;
				
			}

		]]>
	</fx:Script>
	
	<fx:Declarations>
		<s:NumberFormatter id="nf" fractionalDigits="2" trailingZeros="true"/>
	</fx:Declarations>
	
	<s:states>
		<s:State name="default"/>
		<s:State name="landscape"/>
	</s:states>
	<s:Line top="0" left="60" right="0">
		<s:stroke>
			<s:SolidColorStroke weight="1" color="#999999"/>
		</s:stroke>
	</s:Line>
	<s:Line top="{height/4}" left="60" right="0">
		<s:stroke>
			<s:SolidColorStroke weight="1" color="#999999"/>
		</s:stroke>
	</s:Line>
	<s:Line top="{height/4*2}" left="60" right="0">
		<s:stroke>
			<s:SolidColorStroke weight="1" color="#999999"/>
		</s:stroke>
	</s:Line>
	<s:Line top="{height/4*3}" left="60" right="0">
		<s:stroke>
			<s:SolidColorStroke weight="1" color="#999999"/>
		</s:stroke>
	</s:Line>
	<s:Line bottom="0" left="60" right="0">
		<s:stroke>
			<s:SolidColorStroke weight="1" color="#999999"/>
		</s:stroke>
	</s:Line>

	<s:Label top="-8" left="4" text="{nf.format(maxValue)}" fontSize="16" />
	<s:Label top="{height/4-8}" left="4" text="{nf.format(minValue + (maxValue-minValue)/4*3)}" fontSize="16"/>
	<s:Label top="{height/4*2-8}" left="4" text="{nf.format(minValue + (maxValue-minValue)/2)}" fontSize="16"/>
	<s:Label top="{height/4*3-8}" left="4" text="{nf.format(minValue + (maxValue-minValue)/4)}" fontSize="16"/>
	<s:Label bottom="-8" left="4" text="{nf.format(minValue)}" fontSize="16" />
	
	<s:Path id="path" width="100%" height="100%">
		<s:stroke>  
			<s:SolidColorStroke weight="1" color="#FF5900" />  
		</s:stroke>  
	</s:Path> 
		
</s:Group>