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    文檔首頁>>Flash圖表控件 FusionCharts 使用教程>>FusionCharts使用教程:LinkedCharts實現(xiàn)無限層級向下鉆取

    FusionCharts使用教程:LinkedCharts實現(xiàn)無限層級向下鉆取


    FusionCharts XT引入了一個靈活的向下鉆取功能-LinkedCharts,允許你利用單個數(shù)據(jù)源無限層級向下鉆取圖表。所有的鏈接皆來從父表及其數(shù)據(jù),包含了所有子圖表的數(shù)據(jù)和數(shù)據(jù)連接。單擊父表的數(shù)據(jù)圖項目(柱圖,餅圖等),用戶可以向下鉆取到子圖表。通過drill-up選項,子圖表可以替換父圖表。

    以下為LinkedChart功能的實現(xiàn)效果:

    如何渲染FusionCharts圖表

    根據(jù)如下步驟創(chuàng)建LinkedCharts:

    1. 首先,為父圖創(chuàng)建XML/ JSON數(shù)據(jù)。這就是所謂的父數(shù)據(jù)源,包含了數(shù)據(jù)字符串或所有子圖表的data URL。
    2. 其次,將子圖表的數(shù)據(jù)字符串或data URL添加至父數(shù)據(jù)源中。如果使用了數(shù)據(jù)字符串方法,每個子圖表的數(shù)據(jù)被嵌入至父數(shù)據(jù)源,并通過獨特的數(shù)據(jù)標(biāo)識符連接。

    下列代碼用于渲染銷售圖表:

    <html>
    <head><script type="text/javascript" src="FusionCharts/FusionCharts.js" ></script></head>
    <body>
    <div id="chartContainer">FusionCharts XT will load here</div>
    <script type="text/javascript"><!--
    
    var myChart = new FusionCharts( "FusionCharts/Column2D.swf", "myChartId", "320", "250", "0" );
    myChart.setXMLUrl( "Linked-Data.xml" );
    myChart.render( "chartContainer" );
    
    // -->
    </script>
    </body>
    </html>

    在上述代碼中,我們渲染了一個帶有Linked-Data.xml 的Column2D圖表,并將其作為圖表數(shù)據(jù)源。接下來,我們來看看如何在父圖表中為LinkedCharts定義數(shù)據(jù)。定義數(shù)據(jù),需要考慮以下2個方面:

    1、選擇是否將子圖表的圖表數(shù)據(jù)嵌入父圖表數(shù)據(jù)源或讓他們作為一個單獨的URL來源。
    2、為每個數(shù)據(jù)圖(列,線,面等)定義鏈接屬性,然后指定子圖表的數(shù)據(jù)格式和數(shù)據(jù)源。

    接下來一起看一下,如何利用單一數(shù)據(jù)源定義LinkedCharts:

    XML

    <chart caption="Yearly sales" xAxisName="Year" yAxisName="Sales">
    <set label="2004" value="37800" link="newchart-xml-2004-quarterly" />
    <set label="2005" value="21900" link="newchart-xml-2005-quarterly" />
    <set label="2006" value="32900" link="newchart-xml-2006-quarterly" />
    <set label="2007" value="39800" link="newchart-xml-2007-quarterly" />
    
    <linkeddata id="2004-quarterly">
    <chart caption="Quarterly Sales Summary" subcaption="For the year 2004"
    xAxisName="Quarter" yAxisName="Sales">
    <set label="Q1" value="11700" />
    <set label="Q2" value="8600" />
    <set label="Q3" value="6900" />
    <set label="Q4" value="10600" />
    </chart>
    </linkeddata>
    
    <linkeddata id="2005-quarterly">
    <chart caption="Quarterly Sales Summary" subcaption="For the year 2005"
    xAxisName="Quarter" yAxisName="Sales">
    <set label="Q1" value="5500" />
    <set label="Q2" value="7100" />
    <set label="Q3" value="3900" />
    <set label="Q4" value="5400" />
    </chart>
    </linkeddata>
    
    <linkeddata id="2006-quarterly">
    <chart caption="Quarterly Sales Summary" subcaption="For the year 2006"
    xAxisName="Quarter" yAxisName="Sales">
    <set label="Q1" value="6700" />
    <set label="Q2" value="9200" />
    <set label="Q3" value="10800" />
    <set label="Q4" value="6200" />
    </chart>
    </linkeddata>
    
    <linkeddata id="2007-quarterly">
    <chart caption="Quarterly Sales Summary" subcaption="For the year 2007"
    xAxisName="Quarter" yAxisName="Sales">
    <set label="Q1" value="8900" />
    <set label="Q2" value="6600" />
    <set label="Q3" value="11200" />
    <set label="Q4" value="13100" />
    </chart>
    </linkeddata>
    
    </chart>

    JSON

    {
    "chart":{ "caption":"Yearly sales", "xaxisname":"Year", "yaxisname":"Sales" },
    "data":[{ "label":"2004", "value":"37800", "link":"newchart-json-2004-quarterly" },
    { "label":"2005", "value":"21900", "link":"newchart-json-2005-quarterly" },
    { "label":"2006", "value":"32900", "link":"newchart-json-2006-quarterly" },
    { "label":"2007", "value":"39800", "link":"newchart-json-2007-quarterly" }],
    "linkeddata":[{
    "id":"2004-quarterly",
    "linkedchart":{
    "chart":{
    "caption":"Quarterly Sales Summary",
    "subcaption":"For the year 2004",
    "xaxisname":"Quarter",
    "yaxisname":"Sales"
    },
    "data":[{ "label":"Q1", "value":"11700" },
    { "label":"Q2", "value":"8600" },
    { "label":"Q3", "value":"6900" },
    { "label":"Q4", "value":"10600" }]
    }
    },
    {
    "id":"2005-quarterly",
    "linkedchart":{
    "chart":{
    "caption":"Quarterly Sales Summary",
    "subcaption":"For the year 2005",
    "xaxisname":"Quarter",
    "yaxisname":"Sales"
    },
    "data":[{ "label":"Q1", "value":"5500" },
    { "label":"Q2", "value":"7100" },
    { "label":"Q3", "value":"3900" },
    { "label":"Q4", "value":"5400" }]
    }
    },
    {
    "id":"2006-quarterly",
    "linkedchart":{
    "chart":{
    "caption":"Quarterly Sales Summary",
    "subcaption":"For the year 2006",
    "xaxisname":"Quarter",
    "yaxisname":"Sales"
    },
    "data":[{ "label":"Q1", "value":"6700" },
    { "label":"Q2", "value":"9200" },
    { "label":"Q3", "value":"10800" },
    { "label":"Q4", "value":"6200" }]
    }
    },
    {
    "id":"2007-quarterly",
    "linkedchart":{
    "chart":{
    "caption":"Quarterly Sales Summary",
    "subcaption":"For the year 2007",
    "xaxisname":"Quarter",
    "yaxisname":"Sales"
    },
    "data":[{ "label":"Q1", "value":"8900" },
    { "label":"Q2", "value":"6600" },
    { "label":"Q3", "value":"11200" },
    { "label":"Q4", "value":"13100" }]
    }
    }
    ]
    }

     

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