I'm working on a web portal which contains several portlets. These portlets
contain various Google Charts graphs, mainly pie charts. For some reason,
these charts are not all the same size when they are drawn.
I feel like the problem may be connected to the way that I handle data
where all data points are equal to zero. My pie charts do not draw properly
in this situation, so I instead draw a table, which could become a pie
chart later on if the user changes the options they have selected for the
chart.
JS function to draw charts (pie charts are the ones with the problem):
function drawPieChart(_portletIndex) {
var portlet = portlets[_portletIndex];
var targetElName = "#portlet_" + portlet.portletID.toString() + "
.graphics";
var targetEl = $(targetElName).get(0);
//Google requires the data to be in a "DataTable" class, so create one
var data = new google.visualization.DataTable();
//Add columns to data table
data.addColumn('string', 'Data');
data.addColumn('number', 'Value');
/* Add the data to the DataTable row by row, reference:
https://developers.google.com/chart/interactive/docs/basic_preparing_data */
for( var i = 0; i < portlet.chartData.length; i++ ) {
var tempArr = [];
tempArr.push(portlet.chartKeys[i]);
tempArr.push(portlet.chartData[i]);
data.addRow(tempArr);
}
//Chart options
var options = {
width: '100%',
height: '100%',
pieSliceText: 'percent',
pieSliceTextStyle: {color: 'white', fontName: 'Arial Black',
fontSize: 15},
sliceVisibilityThreshold: 0,
is3d: true,
legend: {position: 'labeled', labeledValueText: 'value', maxLines:
6},
chartArea: {width: '80%', height: '95%'}
};
var chart = new google.visualization.PieChart(targetEl);
chart.draw(data, options);
}
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