+ connect(this, SIGNAL(visibilityChanged(bool)), this, SLOT(onVisibilityChanged(bool)));
+ connect(this, SIGNAL(modeChanged(Mode)), this, SLOT(onModeChanged(Mode)));
+ connect(this, SIGNAL(stateChanged(State)), this, SLOT(onStateChanged(State)));
+ connect(this, SIGNAL(toolTipChanged(QString, QString)), SLOT(updateToolTip()));
+ connect(this, SIGNAL(iconsChanged()), this, SLOT(updateIcon()));