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<title>Combining bar and line charts</title>
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div.RGraph_tooltip div#green {
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div.RGraph_tooltip div#red {
background-color: red;
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div.RGraph_tooltip div#gray {
background-color: #ccc;
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<script>
function enlarge_tooltip_graph (e, title)
{
var bg = document.createElement('DIV');
bg.style.opacity = 0;
bg.style.position = 'fixed';
bg.style.left = 0;
bg.style.top = 0;
bg.style.width = '2000px';
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div.style.boxShadow = '0 0 25px gray';
div.style.border = '1px black solid';
bg.appendChild(div);
var canvas = document.createElement('CANVAS');
canvas.width = 300;
canvas.height = 240;
canvas.id = 'big_pie';
div.appendChild(canvas);
bg.onmousedown = function (e)
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this.style.display = 'none';
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div.onmousedown = function (e)
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}
var data = e.target.__object__.data;
var pie = new RGraph.Pie('big_pie', data);
pie.Set('chart.align', 'left');
pie.Set('chart.colors', ['red','#3F3','#ccc']);
pie.Set('chart.key', ['Jane', 'Fred', 'John']);
pie.Set('chart.key.shadow', true);
pie.Set('chart.key.shadow.blur', 15);
pie.Set('chart.key.shadow.offsetx', 0);
pie.Set('chart.key.shadow.offsety', 0);
pie.Set('chart.key.shadow.color', 'gray');
pie.Set('chart.key.rounded', true);
pie.Set('chart.gutter.top', 2);
pie.Set('chart.gutter.bottom', 2);
pie.Set('chart.gutter.left', 2);
pie.Set('chart.gutter.right', 2);
pie.Draw();
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<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
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<a href="./index.html">Documentation</a>
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Combining charts
</div>
<h1>Combining <span>charts</span></h1>
<script>
if (RGraph.isOld()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the RGraph Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
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<ul>
<li><a href="#barandline">Combining bar and line charts</a></li>
<li><a href="#combiningline">Combining Line charts</a></li>
</ul>
<a name="barandline"></a>
<h4>Combining bar and line charts</h4>
<canvas id="myCanvas" width="600" height="250" style="float: right">[No canvas support]</canvas>
<script>
var bar = new RGraph.Bar('myCanvas', [4,5,3,4,1,2,6,5,8,4,9,4]);
bar.Set('chart.title', 'A bar/line/pie combination (tooltips)');
bar.Set('chart.ymax', 15);
bar.Set('chart.colors', ['#ccc', 'red', 'green']);
bar.Set('chart.labels', ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']);
bar.Set('chart.tooltips', ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']);
bar.Set('chart.background.grid.autofit', true);
bar.Set('chart.key', ['John', 'Jane', 'Fred']);
bar.Set('chart.key.shadow', true);
bar.Set('chart.key.shadow.offsetx', 0);
bar.Set('chart.key.shadow.offsety', 0);
bar.Set('chart.key.shadow.blur', 10);
bar.Set('chart.key.shadow.color', 'rgba(128,128,128,0.5)');
bar.Set('chart.key.background', 'white');
bar.Set('chart.key.rounded', true);
bar.Set('chart.background.grid.autofit', true);
bar.Set('chart.background.grid.autofit.numvlines', 12);
bar.Set('chart.background.grid.autofit.numhlines', 5);
bar.Set('chart.gutter.bottom', 30);
bar.Set('chart.gutter.right', 5);
// Define the line first so that it can be added to the bar chart
var line = new RGraph.Line('myCanvas', [1,3,4,3,2,1,4,5,2,3,8,8], [5,6,7,9,7,5,6,3,5,2,5,1]);
line.Set('chart.background.grid', false);
line.Set('chart.linewidth', 2);
line.Set('chart.colors', ['red', 'green']);
line.Set('chart.tickmarks', 'circle');
line.Set('chart.labels.ingraph', ['January',11,,'February']);
line.Set('chart.highlight.fill', 'black');
line.Set('chart.noaxes', true);
line.Set('chart.ylabels', false);
line.Set('chart.animation.unfold.x', true);
// This would all be done programmatically normally, and linked to the key, so that if you change a name in the key,
// it changes in all of the tooltips too
line.Set('chart.tooltips', [
'<b>January</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'January\')"></canvas> <div id="red"></div>Jane: 1<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 4',
'<b>February</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'February\')"></canvas> <div id="red"></div>Jane: 6<br /><div id="green"></div>Fred: 6<br /><div id="gray"></div>John: 5',
'<b>March</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'March\')"></canvas> <div id="red"></div>Jane: 4<br /><div id="green"></div>Fred: 7<br /><div id="gray"></div>John: 3',
'<b>April</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'April\')"></canvas> <div id="red"></div>Jane: 3<br /><div id="green"></div>Fred: 9<br /><div id="gray"></div>John: 4',
'<b>May</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'May\')"></canvas> <div id="red"></div>Jane: 2<br /><div id="green"></div>Fred: 7<br /><div id="gray"></div>John: 1',
'<b>June</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'June\')"></canvas> <div id="red"></div>Jane: 1<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 2',
'<b>July</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'July\')"></canvas> <div id="red"></div>Jane: 4<br /><div id="green"></div>Fred: 6<br /><div id="gray"></div>John: 6',
'<b>Aug</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'August\')"></canvas> <div id="red"></div>Jane: 5<br /><div id="green"></div>Fred: 3<br /><div id="gray"></div>John: 5',
'<b>September</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'September\')"></canvas> <div id="red"></div>Jane: 2<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 8',
'<b>October</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'October\')"></canvas> <div id="red"></div>Jane: 3<br /><div id="green"></div>Fred: 2<br /><div id="gray"></div>John: 4',
'<b>November</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'November\')"></canvas> <div id="red"></div>Jane: 8<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 9',
'<b>December</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'December\')"></canvas> <div id="red"></div>Jane: 8<br /><div id="green"></div>Fred: 1<br /><div id="gray"></div>John: 4',
'<b>January</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'January\')"></canvas> <div id="red"></div>Jane: 1<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 4',
'<b>February</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'February\')"></canvas> <div id="red"></div>Jane: 6<br /><div id="green"></div>Fred: 6<br /><div id="gray"></div>John: 5',
'<b>March</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'March\')"></canvas> <div id="red"></div>Jane: 4<br /><div id="green"></div>Fred: 7<br /><div id="gray"></div>John: 3',
'<b>April</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'April\')"></canvas> <div id="red"></div>Jane: 3<br /><div id="green"></div>Fred: 9<br /><div id="gray"></div>John: 4',
'<b>May</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'May\')"></canvas> <div id="red"></div>Jane: 2<br /><div id="green"></div>Fred: 7<br /><div id="gray"></div>John: 1',
'<b>June</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'June\')"></canvas> <div id="red"></div>Jane: 1<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 2',
'<b>July</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'July\')"></canvas> <div id="red"></div>Jane: 4<br /><div id="green"></div>Fred: 6<br /><div id="gray"></div>John: 6',
'<b>August</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'August\')"></canvas> <div id="red"></div>Jane: 5<br /><div id="green"></div>Fred: 3<br /><div id="gray"></div>John: 5',
'<b>September</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'September\')"></canvas> <div id="red"></div>Jane: 2<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 8',
'<b>October</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'October\')"></canvas> <div id="red"></div>Jane: 3<br /><div id="green"></div>Fred: 2<br /><div id="gray"></div>John: 4',
'<b>November</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'November\')"></canvas> <div id="red"></div>Jane: 8<br /><div id="green"></div>Fred: 5<br /><div id="gray"></div>John: 9',
'<b>December</b><br /> <canvas width="50" height="50" id="__tooltip_canvas__" style="float: right" onclick="enlarge_tooltip_graph(event, \'December\')"></canvas> <div id="red"></div>Jane: 8<br /><div id="green"></div>Fred: 1<br /><div id="gray"></div>John: 4'
]);
//line.Set('chart.tooltips.highlight', false);
// No need to call Draw() - the bar chart will do it
// Add a Line chart tooltip event that draws the tooltip Pie charts
RGraph.AddCustomEventListener(line, 'ontooltip', CreateTooltipGraph);
// Add the line chart to the bar chart
bar.Set('chart.line', line);
// Now use effects
//line.Draw();
//bar.Draw();
RGraph.Effects.Fade.In(bar);
RGraph.Effects.Bar.Grow(bar);
RGraph.Effects.Line.Unfold(bar.Get('chart.line'));
/**
* This is the function that creates the tooltip charts
*/
function CreateTooltipGraph (obj)
{
// If the tooltip canvas doesn't exist, don't try to create the
// tooltip pie chart
if (!document.getElementById("__tooltip_canvas__")) {
return;
}
var index = RGraph.Registry.Get('chart.tooltip').__index__;
var tooltip = obj.Get('chart.tooltips')[index];
// Extract the data for the obj.Get('chart.tooltips')[index]ie chart froim the tooltip
var jane_data = Number(tooltip.replace(/.*Jane: (\d+).*/, '$1'));
var fred_data = Number(tooltip.replace(/.*Fred: (\d+).*/, '$1'));
var john_data = Number(tooltip.replace(/.*John: (\d+).*/, '$1'));
var pie_data = [jane_data,fred_data,john_data];
// This data could be dynamic
var pie = new RGraph.Pie('__tooltip_canvas__', pie_data);
pie.Set('chart.gutter.top', 2);
pie.Set('chart.gutter.bottom', 2);
pie.Set('chart.gutter.left', 2);
pie.Set('chart.gutter.right', 2);
pie.Set('chart.colors', ['red','#3F3','#ccc']);
//pie.Draw();
RGraph.Effects.Pie.Grow(pie);
pie.canvas.style.cursor = 'pointer';
}
</script>
<p>
This is an example of combining Bar and Line charts. It's quite straight-forward, and the code here shows you how it can be achieved.
</p>
<p>
If the values for the line and bar result in different Y scales you may need to specify the <i>chart.ymax</i> property for each chart
so that the scales are the same. The line turns off Y labels so as not to overwrite the Bars labels.
</p>
<b>Tooltips</b>
<p>
You can have tooltips on the Line and Bar chart by setting <i>chart.tooltips.highlight</i> to <i>false</i>, as shown.
The order in which you create the charts is also important, you must define the Bar chart first, and subsequently the Line
chart.
</p>
<h4>Update - 28th August 2011</h4>
<p>
You can now have tooltips on both the Line chart <b>and</b> the Bar chart, as is shown in the chart here. Keep in mind
that you will need to have highlighting turned off on both chart types - <i>chart.tooltips.highlight</i>.
</p>
<pre class="code">
<script>
line.Set('chart.tooltips.highlight', false);
bar.Set('chart.tooltips.highlight', false);
</script>
</pre>
<p>
Because the tooltips are only triggered by the Line chart, you should put all of the information, for both the Line and the
Bar chart, in the tooltips.
</p>
<a name="combiningline"></a>
<h4>Combining Line charts</h4>
<!-- This is the canvas that both the line charts use -->
<canvas id="myCanvas2" width="600" height="250" style="float: right">[No canvas support]</canvas>
<script>
line2 = new RGraph.Line('myCanvas2', [51,22,23,33,35,23,32,45]);
line2.Set('chart.hmargin', 10);
line2.Set('chart.labels', ['Kiff', 'Wayne', 'Pete', 'Lou', 'Jake', 'Jo', 'Fred', 'Bob']);
line2.Set('chart.linewidth', 3);
line2.Set('chart.shadow', true);
line2.Set('chart.shadow.offsetx', 2);
line2.Set('chart.shadow.offsety', 2);
line2.Set('chart.ymax', 65);
line2.Set('chart.units.post', 'l');
line2.Set('chart.noendxtick', true);
line2.Set('chart.title', 'An example of axes both sides');
line2.Set('chart.title.yaxis', 'Cost ($)');
line2.Set('chart.title.yaxis.align', 'right');
line2.Set('chart.title.yaxis.pos', 0.8);
line2.Set('chart.gutter.left', 55);
line2.Set('chart.gutter.right', 55);
line2.Set('chart.background.grid.autofit', true);
line2.Draw();
line3 = new RGraph.Line('myCanvas2', [42,50,51,23,46,48,65,11]);
line3.Set('chart.title.yaxis', 'Volume (l)');
line3.Set('chart.hmargin', 10);
line3.Set('chart.linewidth', 3);
line3.Set('chart.shadow', true);
line3.Set('chart.shadow.offsetx', 2);
line3.Set('chart.shadow.offsety', 2);
line3.Set('chart.yaxispos', 'right');
line3.Set('chart.gutter.left', 55);
line3.Set('chart.gutter.right', 55);
line3.Set('chart.noendxtick', true);
line3.Set('chart.background.grid', false);
line3.Set('chart.ymax', 100);
line3.Set('chart.colors', ['blue', 'red']);
line3.Set('chart.units.pre', '$');
line3.Set('chart.key', ['Cost', 'Volume']);
line3.Set('chart.key.background', 'rgba(255,255,255,0.8)');
line3.Draw();
</script>
<p>
Another type of chart you may want is a line chart with Y axes on both sides, as illustrated on the right. You should
be careful with this chart type as it can easily lead to confusion.
</p>
<p>
This chart is made up from two line charts, one with the Y axis on the left and one on the right. The code that makes up
this chart is below.
</p>
<p>
The only reason to combine line charts is to get Y axes on the left and right. If you simply want mutiple lines,
you can do this without combining any charts. <a href="../examples/line.html">See the line chart example page</a>
</p>
<br clear="all" />
<pre class="code">
<script>
window.onload = function
{
line2 = new RGraph.Line('myCanvas2', [51,22,23,33,35,23,32,45]);
line2.Set('chart.hmargin', 10);
line2.Set('chart.labels', ['Kiff', 'Wayne', 'Pete', 'Lou', 'Jake', 'Jo', 'Fred', 'Bob']);
line2.Set('chart.linewidth', 3);
line2.Set('chart.shadow', true);
line2.Set('chart.shadow.offsetx', 2);
line2.Set('chart.shadow.offsety', 2);
line2.Set('chart.ymax', 65);
line2.Set('chart.units.post', 'l');
line2.Set('chart.noxaxis', true);
line2.Set('chart.noendxtick', true);
line2.Set('chart.title', 'An example of axes both sides');
line2.Draw();
line3 = new RGraph.Line('myCanvas2', [42,50,51,23,46,48,65,11]);
line3.Set('chart.hmargin', 10);
line3.Set('chart.linewidth', 3);
line3.Set('chart.shadow', true);
line3.Set('chart.shadow.offsetx', 2);
line3.Set('chart.shadow.offsety', 2);
line3.Set('chart.yaxispos', 'right');
line3.Set('chart.noendxtick', true);
line3.Set('chart.background.grid', false);
line3.Set('chart.ymax', 65);
line3.Set('chart.colors', ['blue', 'red']);
line3.Set('chart.units.pre', '$');
line3.Set('chart.key', ['Cost', 'Volume']);
line3.Set('chart.key.background', 'rgba(255,255,255,0.5)');
line3.Draw();
}
</script>
</pre>
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