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authorYves Fischer <yvesf-git@xapek.org>2013-04-18 02:01:04 +0200
committerYves Fischer <yvesf-git@xapek.org>2013-04-18 02:01:04 +0200
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-Frequently asked questions
---------------------------
-
-Q: How much data can Flot cope with?
-
-A: Flot will happily draw everything you send to it so the answer
-depends on the browser. The excanvas emulation used for IE (built with
-VML) makes IE by far the slowest browser so be sure to test with that
-if IE users are in your target group.
-
-1000 points is not a problem, but as soon as you start having more
-points than the pixel width, you should probably start thinking about
-downsampling/aggregation as this is near the resolution limit of the
-chart anyway. If you downsample server-side, you also save bandwidth.
-
-
-Q: Flot isn't working when I'm using JSON data as source!
-
-A: Actually, Flot loves JSON data, you just got the format wrong.
-Double check that you're not inputting strings instead of numbers,
-like [["0", "-2.13"], ["5", "4.3"]]. This is most common mistake, and
-the error might not show up immediately because Javascript can do some
-conversion automatically.
-
-
-Q: Can I export the graph?
-
-A: This is a limitation of the canvas technology. There's a hook in
-the canvas object for getting an image out, but you won't get the tick
-labels. And it's not likely to be supported by IE. At this point, your
-best bet is probably taking a screenshot, e.g. with PrtScn.
-
-
-Q: The bars are all tiny in time mode?
-
-A: It's not really possible to determine the bar width automatically.
-So you have to set the width with the barWidth option which is NOT in
-pixels, but in the units of the x axis (or the y axis for horizontal
-bars). For time mode that's milliseconds so the default value of 1
-makes the bars 1 millisecond wide.
-
-
-Q: Can I use Flot with libraries like Mootools or Prototype?
-
-A: Yes, Flot supports it out of the box and it's easy! Just use jQuery
-instead of $, e.g. call jQuery.plot instead of $.plot and use
-jQuery(something) instead of $(something). As a convenience, you can
-put in a DOM element for the graph placeholder where the examples and
-the API documentation are using jQuery objects.
-
-Depending on how you include jQuery, you may have to add one line of
-code to prevent jQuery from overwriting functions from the other
-libraries, see the documentation in jQuery ("Using jQuery with other
-libraries") for details.
-
-
-Q: Flot doesn't work with [insert name of Javascript UI framework]!
-
-A: The only non-standard thing used by Flot is the canvas tag;
-otherwise it is simply a series of absolute positioned divs within the
-placeholder tag you put in. If this is not working, it's probably
-because the framework you're using is doing something weird with the
-DOM, or you're using it the wrong way.
-
-A common problem is that there's display:none on a container until the
-user does something. Many tab widgets work this way, and there's
-nothing wrong with it - you just can't call Flot inside a display:none
-container as explained in the README so you need to hold off the Flot
-call until the container is actually displayed (or use
-visibility:hidden instead of display:none or move the container
-off-screen).
-
-If you find there's a specific thing we can do to Flot to help, feel
-free to submit a bug report. Otherwise, you're welcome to ask for help
-on the forum/mailing list, but please don't submit a bug report to
-Flot.