проблема с тачскрином Elo

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    grabGesture(Qt::TapGesture);
    grabGesture(Qt::TapAndHoldGesture);
    grabGesture(Qt::PanGesture);
    grabGesture(Qt::PinchGesture);
    grabGesture(Qt::SwipeGesture);
}

MainWindow::~MainWindow()
{
}


bool MainWindow::event(QEvent *ev)
{
    if (ev->type() == QEvent::Gesture)
    {
        qDebug()<<"Gesture event";
    }
    else
    if (ev->type() == QEvent::MouseButtonPress)
    {
        qDebug()<<"Mouse press event";
    }
    return QWidget::event(ev);
}