Protovis force re-render

I know Protovis isn't really meant to be used this way, but is there a workaround for destroying what's currently in a pv.Panel and re-add()'ing and re-render()'ing a panel?

I'm working on a visualization which was buil开发者_运维百科t to be static and trying to migrate it to being updated periodically via WebSockets.

Yes you can have Protovis re-render without destroying the panel. You can update the data used by a panel, and call render on it again. For example:

var data = [1, 2, 3];

var panel = new pv.Panel()
    .data(data)
    .add(pv.Bar)
    ...

panel.render();  // initial render

data = [4, 5, 6];  
panel.data(data);  // update the data
panel.render();    // re-render