我正在使用谷歌视觉化来绘制饼图。我想面对的是,我无法在饼图上捕捉点击事件。我这样做。
function drawchartfromRe()
{
dashboard = new google.visualization.Dashboard(
document.getElementById('dashboard_div'));
//alert("RefuelLength"+totrefuelList.length);
//alert("Vehicleid:"+totrefuelList[0].vehicleId);
//google.load("visualization", "1", {packages:["corechart"]});
data = new google.visualization.DataTable();
data.addColumn('string', 'Task');
data.addColumn('number', 'Quantity');
data.addRows(totrefuelList.length);
for (var i=0;i<totrefuelList.length;i++)
{
data.setValue(i, 0, totrefuelList[i].vehicleName);
data.setValue(i, 1, totrefuelList[i].totalRefuelQty);
}
// var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart = new google.visualization.ChartWrapper({
'chartType': 'PieChart',
'containerId': 'chart_div',
'options': {
title: 'Refuel Trend',
height:'500',
width:'400',
backgroundColor: { fill:'transparent' },
'legend': 'right'
}
});
/* google.visualization.events.addListener(chart, 'select', function(e) {
// var selection = chart.getSelection();
var vehid= data.getValue(visualization.getSelection()[0].row, 0);
getRefueldailywise(vehid);
});*/
// chart.draw(data, options);
drawDashboard(dashboard,data,chart);
google.visualization.events.addListener(chart, 'select', function() {
// grab a few details before redirecting
alert(data.getValue(chart.getSelection()[0].row, 0));
//location.href = 'http://www.google.com?row=' + row + '&col=' + col + '&year=' + year;
});
}
在萤火虫中我得到这样的错误.. dashboard.getChart不是函数
答案 0 :(得分:8)
图表包装器不是图表对象,也没有click
事件。实际上,Pie Charts also do not have a click event只有select
。
ready
事件ready
事件触发包装器中图表的select
事件以下是他们给出的例子:
var wrapper;
function drawVisualization() {
// Draw a column chart
wrapper = new google.visualization.ChartWrapper({
chartType: 'ColumnChart',
dataTable: [['Germany', 'USA', 'Brazil', 'Canada', 'France', 'RU'],
[700, 300, 400, 500, 600, 800]],
options: {'title': 'Countries'},
containerId: 'visualization'
});
// Never called.
google.visualization.events.addListener(wrapper, 'onmouseover', uselessHandler);
// Must wait for the ready event in order to
// request the chart and subscribe to 'onmouseover'.
google.visualization.events.addListener(wrapper, 'ready', onReady);
wrapper.draw();
// Never called
function uselessHandler() {
alert("I am never called!");
}
function onReady() {
google.visualization.events.addListener(wrapper.getChart(), 'onmouseover', usefulHandler);
}
// Called
function usefulHandler() {
alert("Mouseover event!");
}
}
因此,在您的情况下,您需要更改此部分:
google.visualization.events.addListener(chart, 'ready', function() {
// grab a few details before redirecting
alert(data.getValue(chart.getSelection()[0].row, 0));
//location.href = 'http://www.google.com?row=' + row + '&col=' + col + '&year=' + year;
});
对于这样的事情:
google.visualization.events.addListener(chart, 'ready', function() {
// grab a few details before redirecting
google.visualization.events.addListener(chart.getChart(), 'select', function() {
chartObject = chart.getChart();
alert(data.getValue(chartObject.getSelection()[0].row, 0));
});
//location.href = 'http://www.google.com?row=' + row + '&col=' + col + '&year=' + year;
});