Add Phonon::SeekSlider in Qt Creator?

I’m trying to add a Phonon::SeekSlider in Qt Creator but can only add it to my form in code.

开发者_如何转开发seekSlider = new Phonon::SeekSlider(this);
seekSlider->setMediaObject(mediaObject);
ui->setupUi(this);
seekSlider->show();

How can I add the SeekSilder in Qt Creator?

There's a section in widget selector for Phonon objects (at least in Qt Creator 2.3 with Qt 4.7). It contains the SeekSlider, VideoPlayer, VideoWidget and VolumeSlider widgets.

Check if you have /usr/lib/qt4/plugins/designer/libphononwidgets.so. If not install package: libphonon4-designer