QPoint global = m_zoomSlider->rect().topLeft();
global.ry() += m_zoomSlider->height() / 2;
QHelpEvent toolTipEvent(QEvent::ToolTip, QPoint(0, 0), m_zoomSlider->mapToGlobal(global));
QPoint global = m_zoomSlider->rect().topLeft();
global.ry() += m_zoomSlider->height() / 2;
QHelpEvent toolTipEvent(QEvent::ToolTip, QPoint(0, 0), m_zoomSlider->mapToGlobal(global));