› Code Snippets › Patching Kirocker Music Display for volume control via mouse scrolling Syndicate content

Fri, 03/28/2008 - 16:32

Kirocker is such a great application, it’s a pity the developer Sébastien Laoût has given up on it and is using Windows now!

Usually I only use the kicker applet, the full screen window is nice for parties though. But I didn’t like the way the applet handles scroll events: It seeks (if possible). Since I rarely seek when listening to music I’d rather have the behaviour of the Amarok tray icon: volume control!

I had a look inside the sources and found this part in src/coverdisplay.cpp:

  1. void CoverDisplay::wheelEvent(QWheelEvent *event)
  2. {
  3.     if (areControlsShown()) {
  4.       if (event->orientation() == Qt::Vertical) {
  5.          PlayerInformation *infos = PlayerInformation::instance();
  6.           if (infos->canSeek()) {
  7.              int deltaSeconds = 10 * (event->delta() > 0 ? 1 : -1);
  8.                m_infos->seekRelative(deltaSeconds);
  9.             }
  10.       } else {
  11.            if (event->delta() > 0)
  12.               AmarokApi::volumeUp();
  13.          else
  14.                AmarokApi::volumeDown();
  15.        }
  16.   }
  17. }

As you can see it already supports volume control via scrolling! The thing is I’ve disable four-way scrolling for my MX1000. Thus I’ve simply swapped the if statements and now I’m really happy with Kirocker. Here’s the updated snippet:

  1. void CoverDisplay::wheelEvent(QWheelEvent *event)
  2. {
  3.     if (areControlsShown()) {
  4.         if (event->orientation() == Qt::Vertical) {
  5.             if (event->delta() > 0)
  6.                 AmarokApi::volumeUp();
  7.             else
  8.                 AmarokApi::volumeDown();
  9.         } else {
  10.             PlayerInformation *infos = PlayerInformation::instance();
  11.             if (infos->canSeek()) {
  12.                 int deltaSeconds = 10 * (event->delta() > 0 ? 1 : -1);
  13.                 m_infos->seekRelative(deltaSeconds);
  14.             }
  15.         }
  16.     }
  17. }

Replace the old code, compile Kirocker, install it. Then restart kicker (killall kicker; sleep 1; kicker;) and Kirocker should accept scroll events in the way the Amarok tray icon does!

Comments

Post new comment

The content of this field is kept private and will not be shown publicly.
  • You can use Markdown syntax to format and style the text. Also see Markdown Extra for tables, footnotes, and more.
  • You can enable syntax highlighting of source code with the following tags: <code>, <blockcode>, <pre>.
  • Web page addresses and e-mail addresses turn into links automatically.

More information about formatting options