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圖表控件ChartDirector使用教程：極線圖表創建（附源碼）

原創|其它|編輯：郝浩|2012-11-26 13:10:43.000|閱讀 825 次

概述：本文介紹了圖表控件ChartDirector的使用教程，極線圖表創建，附源碼。

# 界面/圖表報表/文檔/IDE等千款熱門軟控件火熱銷售中 >>

相關鏈接：

今天來看看如何在ChartDirector創建完整的帶數據符號和數據標簽的極線圖表，如下所示：

圖表控件ChartDirector使用教程：極線圖表創建（附源碼）

對于實現以上的這個圖表，主要采用以下的步驟完成：

實現的代碼如下：

cfscript>

// ChartDirector for ColdFusion API Access Point
cd = CreateObject("java", "ChartDirector.CFChart");

// A utility to allow us to create arrays with data in one line of code
function Array() {
    var result = ArrayNew(1);
    var i = 0;
    for (i = 1; i LTE ArrayLen(arguments); i = i + 1)
        result[i] = arguments[i];
    return result;
}

// The data for the chart
data0 = Array(90, 25, 40, 55, 68, 44, 79, 85, 50);
angles0 = Array(15, 60, 110, 180, 230, 260, 260, 310, 340);

data1 = Array(80, 91, 66, 80, 92, 87);
angles1 = Array(40, 65, 88, 110, 150, 200);

// Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0)
// background and 1 pixel 3D border
c = cd.PolarChart(460, 500, "0xe0e0e0", "0x000000", 1);

// Set search path to current directory for loading icon images
c.setSearchPath(GetPageContext());

// Add a title to the chart at the top left corner using 15pts Arial Bold Italic
// font. Use a wood pattern as the title background.
c.addTitle("Polar Line Chart Demo", "Arial Bold Italic", 15).setBackground(
    c.patternColor("wood.png"));

// Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff)
// background.
c.setPlotArea(230, 280, 180, "0xffffff");

// Set the grid style to circular grid, with grids below the chart layers
c.setGridStyle(False, False);

// Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use
// 10 pts Arial Bold font, with 1 pixel 3D border effect.
b = c.addLegend(230, 35, False, "Arial Bold", 9);
b.setAlignment(cd.TopCenter);
b.setBackground(cd.Transparent, cd.Transparent, 1);

// Set angular axis as 0 - 360, with a spoke every 30 units
c.angularAxis().setLinearScale(0, 360, 30);

// Add a blue (0xff) line layer to the chart using (data0, angle0)
layer0 = c.addLineLayer(data0, "0x0000ff", "Close Loop Line");
layer0.setAngles(angles0);

// Set the line width to 2 pixels
layer0.setLineWidth(2);

// Use 11 pixel triangle symbols for the data points
layer0.setDataSymbol(cd.TriangleSymbol, 11);

// Enable data label and set its format
layer0.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light blue (0x9999ff) backgruond color and 1
// pixel 3D border effect
layer0.setDataLabelStyle().setBackground("0x9999ff", cd.Transparent, 1);

// Add a red (0xff0000) line layer to the chart using (data1, angle1)
layer1 = c.addLineLayer(data1, "0xff0000", "Open Loop Line");
layer1.setAngles(angles1);

// Set the line width to 2 pixels
layer1.setLineWidth(2);

// Use 11 pixel diamond symbols for the data points
layer1.setDataSymbol(cd.DiamondSymbol, 11);

// Set the line to open loop
layer1.setCloseLoop(False);

// Enable data label and set its format
layer1.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light red (0xff9999) backgruond color and 1 pixel
// 3D border effect
layer1.setDataLabelStyle().setBackground("0xff9999", cd.Transparent, 1);

// Output the chart
chart1URL = c.makeSession(GetPageContext(), "chart1");

// Include tool tip for the chart
imageMap1 = c.getHTMLImageMap("", "", "title='[{dataSetName}] ({radius}, {angle})'");

</cfscript>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Polar Line Chart
</div>
<hr style="border:solid 1px #000080" />
<cfoutput>
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <a href='viewsource.cfm?file=#CGI.SCRIPT_NAME#'>View Source Code</a>
</div>
<img src="getchart.cfm?#chart1URL#" usemap="##map1" border="0" />
<map name="map1">#imageMap1#</map>
</cfoutput>
</body>
</html>

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