Question

我正在尝试使用gwt原生javascript显示谷歌图表，但我没有得到以下任何输出是我的代码：

GwtChart.html

<!doctype html>
<!-- The DOCTYPE declaration above will set the     -->
<!-- browser's rendering engine into                -->
<!-- "Standards Mode". Replacing this declaration   -->
<!-- with a "Quirks Mode" doctype is not supported. -->

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">

    <!--                                                               -->
    <!-- Consider inlining CSS to reduce the number of requested files -->
    <!--                                                               -->
    <link type="text/css" rel="stylesheet" href="GwtChart.css">

    <!--                                           -->
    <!-- Any title is fine                         -->
    <!--                                           -->
    <title>Web Application Starter Project</title>

    <!--                                           -->
    <!-- This script loads your compiled module.   -->
    <!-- If you add any GWT meta tags, they must   -->
    <!-- be added before this line.                -->
    <!--                                           -->

    <script type="text/javascript" language="javascript" src="gwtchart/gwtchart.nocache.js"></script>
  <script  type="text/javascript"  src="http://www.google.com/jsapi"></script>     


  </head>
  <body>
<div id="visualization" style="width: 600px; height: 400px;"></div>
  </body>
</html>

GwtChart.java

public class GwtChart implements EntryPoint {

    //ChartServiceAsync chartService=GWT.create(ChartService.class); 

    public void onModuleLoad() {

        createChart() ;

    }

     private native void createChart() 
          /*-{

    $wnd.google.load('visualization', '1', {packages: ['corechart']});

      function drawVisualization() {
        // Create and populate the data table.

        var data = $wnd.google.visualization.arrayToDataTable([
          ['Year', 'Austria', 'Bulgaria', 'Denmark', 'Greece'],
          ['2003',  1336060,    400361,    1001582,   997974],
          ['2004',  1538156,    366849,    1119450,   941795],
          ['2005',  1576579,    440514,    993360,    930593],
          ['2006',  1600652,    434552,    1004163,   897127],
          ['2007',  1968113,    393032,    979198,    1080887],
          ['2008',  1901067,    517206,    916965,    1056036]
        ]);


        new $wnd.google.visualization.BarChart($wnd.document.getElementById('visualization')).
            draw(data,
                 {title:"Yearly Coffee Consumption by Country",
                  width:600, height:400,
                  vAxis: {title: "Year"},
                  hAxis: {title: "Cups"}}
            );
      }


      $wnd.google.setOnLoadCallback(drawVisualization);
         }-*/;


        }

任何人都可以帮我用gwt中的原生javascript编写谷歌图表。

Answer 1

是什么让你想做本地的？

我通常使用wrapper from here

这不适合你吗？

Answer 2

1）试试这个：

$wnd.google.load("visualization", "1.0", {packages : [ 'corechart' ], callback: drawVisualization});

而不是这两行：

$wnd.google.load('visualization', '1', {packages: ['corechart']});


$wnd.google.setOnLoadCallback(drawVisualization);

或 2）使用

在HTML页面中调用google.load

<script type="text/javascript"  src="http://www.google.com/jsapi"></script>     
<script type="text/javascript">
    google.load("visualization", "1", {'packages' : ["corechart"] });
</script>

如何使用本机JavaScript在gwt中编写谷歌图表

2 个答案: