About
RGraph is a JavaScript charts library based on
HTML5 SVG and canvas. RGraph is mature (over 17 years
old) and has a wealth of features making it an ideal
choice to use for showing charts on your website.
New datagrid in v6.21
In version 6.21 a new datagrid object has been added.
This makes it easy to add static or dynamic data
tables to your pages. It can be used whether you use the
canvas or SVG libraries or entirely standalone.
Download
Get the latest version of RGraph (version 6.21, 10th April 2025) from
the download page. You can read the changelog here. There's also older versions available,
minified files and links to cdnjs.com hosted libraries.
License
RGraph can be used for free under the GPL or if
that doesn't suit your situation there's an
inexpensive (£129) commercial license available.The textBaseline property
The textBaseline property sets how any text that you draw on the
canvas is vertically aligned. By using this
property you can control the vertical alignment of whatever text you draw on to the
canvas. Remember that if
you set this property you may need to reset it or change when drawing subsequent
text.
Note that the bottom and ideographic may appear to be very similar
in their positioning of the text.
Examples of setting the textBaseline property
These are the possible values for the setting. It should be noted that RGraph only uses three of these values - middle top
and bottom.
<script>
window.onload = function ()
{
var canvas = document.getElementById("cvs");
var context = canvas.getContext('2d');
context.textBaseline = 'top';
// context.textBaseline = 'hanging';
// context.textBaseline = 'middle';
// context.textBaseline = 'alphabetic';
// context.textBaseline = 'ideographic';
// context.textBaseline = 'bottom';
context.fillText('Some example text', 200, 25);
}
</script>