google.charts.load('current', {
callback: drawChart,
packages: ['corechart']
});
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Category', 'Value', 'Reference'],
['Quant', 0.10, 0.80],
['Verbal', 0.30, 0.80],
['Total', 0.20, 0.80]
]);
var chartDiv = document.getElementById('chart_div');
var chart = new google.visualization.ColumnChart(chartDiv);
// use colors to find chart elements
var colorMagenta = '#ff00ff';
var colorLime = '#00ff00';
var xBeg; // save first x coord
var xWidth; // save width of column
var rowIndex = -1; // find first column
google.visualization.events.addListener(chart, 'ready', function() {
// columns
Array.prototype.forEach.call(chartDiv.getElementsByTagName('rect'), function(rect, index) {
if (rect.getAttribute('fill') === colorLime) {
rowIndex++;
xWidth = parseFloat(rect.getAttribute('width'))/2;
if (rowIndex === 0) {
xBeg = parseFloat(rect.getAttribute('x'));
}
}
});
// reference line
Array.prototype.forEach.call(chartDiv.getElementsByTagName('path'), function(path, index) {
if (path.getAttribute('stroke') === colorMagenta) {
// change line coords
var refCoords = path.getAttribute('d').split(',');
refCoords[0] = 'M' + xBeg;
var refWidth = refCoords[2].split('L');
refWidth[1] = parseFloat(refWidth[1]) + xWidth;
refCoords[2] = refWidth.join('L');
path.setAttribute('d', refCoords.join(','));
}
});
});
chart.draw(data, {
colors: [colorLime, colorMagenta],
legend: 'none',
series: {
1: {
type: 'line'
}
},
title: 'Percentile Score',
vAxis: {
format: 'percent',
viewWindow: {
min: 0,
max: 1
}
}
});
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
zu finden klingt wie du warst auf dem richtigen weg, vielleicht folge ich nicht der frage, hoffe das hilft ... – WhiteHat
ja das ist so weit wie möglich, gibt es eine möglichkeit, die linie in voller breite zu machen? – Maruccio
Siehe __EDIT__ nach oben, um die Linie an die Kanten zu erweitern ... – WhiteHat