Rendering on demand in QtVSG

[dov]

I'm working on an vsgQt based application which is static most of the time. However the vsg graph is still rerendered at a high framerate. How would I change the application so that the rendering is on demand only? Or similarly, that unless something changes, only the "last quad" is presented.

[robertosfield]

vsgQt::Viewer uses a Qt timer to drive the continues update, you can set the timer interval in ms to control the frame rate or toggle on/off the continuous update.

The vsgqtviewer enables control of both via the --interval and --event-driven command line options. From the example the command line parsing:

    bool continuousUpdate = !arguments.read({"--event-driven", "--ed"});
    auto interval = arguments.value<int>(8, "--interval");

And where these values are passed on when setting up the Viewer:

    if (interval >= 0) viewer->setInterval(interval);
    viewer->continuousUpdate = continuousUpdate;