I have a bar-chart with five columns on the legend, but all the five
columns show on the legend. My boss wants me to hide or delete the columns
from the legend when there is *no data***(please check below for no data)
or when there is no row data. For example if there is data for 3 out of the
5 when the chart loads, the legend should only show 3 columns. Scenario
--> (Medication = 300, Groceries = 825, Garden = 0, Miscellaneous = 276)
will want the legend to show Only Medication, Groceries, and Miscellaneous.
***No data* could be 0 like Garden = 0 or can be null like SportingEquip
doesn't exist at all.
var options = {
backgroundColor: 'transparent',
hAxis: { minValue: 0, format: '0', gridlines: { count: -1 } },
colors: ['#0F2D52', '#789A3D', '#EE7623', '#231F20', '#7EA0C3'],
legend: { position: 'bottom', textStyle: {fontSize: 6}},
isStacked: true
};
var drawChart = function (data, options) {
var chartDomId = "purchase_trends";
var wrapper = new google.visualization.ChartWrapper({
chartType: 'BarChart',
dataTable: data,
options: options,
containerId: chartDomId
});
wrapper.draw();
};
var data;
this.LoadChart = function () {
if (data != null) {
drawChart(data, options);
} else {
return $.ajax({
type: 'GET',
url: '/Charts/GetPurchaseTrends',
dataType: "json",
cache: false,
success: function (jsonData) {
data = new google.visualization.DataTable({
cols: [
{ type: 'string', label: 'Year' },
{ type: 'number', label: 'Medication' },
{ type: 'number', label: 'Sporting Equip.' },
{ type: 'number', label: 'Groceries' },
{ type: 'number', label: 'Garden & Lawn' },
{ type: 'number', label: 'Miscellaneous' }
]
});
var results = jsonData;
if (results.Data.length > 0) {
for (var i = 0; i < results.Data.length; i++) {
var yearNumber = results.Data[i].Year;
var medication = results.Data[i].Medication;
var sportingEquip = results.Data[i].Sporting;
var groceries = results.Data[i].Groceries;
var garden = result.Data[i].Garden;
var miscellaneous =
result.Data[i].Miscellaneous;
data.addRow([yearNumber.toString(), medication, sportingEquip, groceries,
garden, miscellaneous]);
}
}
},
error: function (msg) {
console.log(msg);
},
complete: function () {
drawChart(data, options);
$(window).resize(function () {
drawChart(data, options);
});
}
});
}
};
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