Use of Chartjs Library

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4 meses 1 semana antes - 4 meses 1 semana antes #182860 por develnick
Hi! I'd like to implement a radar chart in my survey, like this.

jsfiddle.net/mascarock/h36dfuac/25/


I tried to write this code in my question source code, but I get a blank page (see the image).

My survey is attached



- Nick
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Última Edición: 4 meses 1 semana antes por develnick.

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4 meses 1 semana antes #182876 por tpartner
Respuesta de tpartner sobre el tema Use of Chartjs Library
The problem is that your target canvas does not exist before your firing of the chart script.

Wrap the chart script in a $(document).on('ready pjax:scriptcomplete',function(){}); function so it is not fired until the page is completely loaded.

<script type="text/javascript" src="https://www.chartjs.org/dist/2.8.0/Chart.min.js"></script>
<script type="text/javascript" src="https://www.chartjs.org/samples/latest/utils.js"></script>
<script type="text/javascript">
 
	$(document).on('ready pjax:scriptcomplete',function(){
 
 
		var presets = window.chartColors;
		var utils = Samples.utils;
		var inputs = {
			min: 8,
			max: 16,
			count: 8,
			decimals: 2,
			continuity: 1
		};
 
		function generateData() {
			// radar chart doesn't support stacked values, let's do it manually
			var values = utils.numbers(inputs);
			inputs.from = values;
			return values;
		}
 
		function generateLabels() {
			return utils.months( { 
      count: inputs.count }
      );
		}
 
		utils.srand(42);
 
		var data = {
			labels: generateLabels(),
			datasets: [{
				backgroundColor: utils.transparentize(presets.red),
				borderColor: presets.red,
				data: generateData(),
				label: 'D0'
			}, {
				backgroundColor: utils.transparentize(presets.orange),
				borderColor: presets.orange,
				data: generateData(),
				hidden: true,
				label: 'D1',
				fill: '-1'
			}, {
				backgroundColor: utils.transparentize(presets.yellow),
				borderColor: presets.yellow,
				data: generateData(),
				label: 'D2',
				fill: 1
			}, {
				backgroundColor: utils.transparentize(presets.green),
				borderColor: presets.green,
				data: generateData(),
				label: 'D3',
				fill: false
			}, {
				backgroundColor: utils.transparentize(presets.blue),
				borderColor: presets.blue,
				data: generateData(),
				label: 'D4',
				fill: '-1'
			}, {
				backgroundColor: utils.transparentize(presets.purple),
				borderColor: presets.purple,
				data: generateData(),
				label: 'D5',
				fill: '-1'
			}]
		};
 
		var options = {
			maintainAspectRatio: true,
			spanGaps: false,
			elements: {
				line: {
					tension: 0.000001
				}
			},
			plugins: {
				filler: {
					propagate: false
				},
				'samples-filler-analyser': {
					target: 'chart-analyser'
				}
			}
		};
 
		var chart = new Chart('chart-0', {
			type: 'radar',
			data: data,
			options: options
		});
 
		// eslint-disable-next-line no-unused-vars
		function togglePropagate(btn) {
			var value = btn.classList.toggle('btn-on');
			chart.options.plugins.filler.propagate = value;
			chart.update();
		}
 
		// eslint-disable-next-line no-unused-vars
		function toggleSmooth(btn) {
			var value = btn.classList.toggle('btn-on');
			chart.options.elements.line.tension = value ? 0.4 : 0.000001;
			chart.update();
		}
 
		// eslint-disable-next-line no-unused-vars
		function randomize() {
			inputs.from = [];
			chart.data.datasets.forEach(function(dataset) {
				dataset.data = generateData();
			});
			chart.update();
		}	
	});
</script>
<div class="content">
	<div class="wrapper" style="max-width: 920px; margin: auto">
		<canvas id="chart-0"></canvas>
	</div>
</div>

Sample survey attached:

Archivo Adjunto:

Nombre del Archivo: limesurvey...8318.lss
Tamaño del Archivo:19 KB

Cheers,
Tony Partner

Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.
Official LimeSurvey Partner - partnersurveys.com
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