January 2013
Intermediate to advanced
328 pages
7h 14m
English
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Updating live data in charts with polling
It's possible to update the chart in a timely manner with the help of the <p:poll> component.
How to do it...
The following definition updates the pie chart every 3 seconds:
<p:poll interval="3" update="live" />
<p:pieChart id="live" value="#{pieChartController.livePieModel}" style="height:250px" />The data model definition with the getter method, which will randomly create chart data, is given as follows:
PieChartModel liveChartModel = new PieChartModel(); liveChartModel.set("Candidate 1", 500); liveChartModel.set("Candidate 2", 300); public PieChartModel getLivePieModel() { int random1 = (int)(Math.random() * 1000); int random2 = (int)(Math.random() * 1000); liveChartModel.getData().put("Candidate 1", ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.