#include <QApplication>
#include <QHeaderView>
#include <QCursor>
#include <QTimer>
#include <QTreeWidget>

class Watcher : public QObject
{
    Q_OBJECT
public:
    Watcher(QWidget *w, const QCursor &c1, const QCursor &c2, QTreeWidgetItem *item)
    : m_w(w)
    , m_cursor1(c1)
    , m_cursor2(c2)
    , m_item(item)
    {
        m_timer.setInterval(500);
        m_timer.start();
        connect(&m_timer, SIGNAL(timeout()),
                this, SLOT(onTimeout()));
    }
private Q_SLOTS:
    void onTimeout()
    {
        static int i = 0;
        QCursor cur(((i++) % 2) ? m_cursor1 : m_cursor2);
        m_w->setCursor(cur);

        const QPoint pos = QCursor::pos();
        QWidget *w = QApplication::widgetAt(pos);
        const QPoint loc = w ? w->mapFromGlobal(pos) : QPoint();
        m_item->setText(0, QString("Widget at global pos %1/%2 is %3 at local pos %4/%5").arg(pos.x()).arg(pos.y()).arg(w ? w->objectName() : QString()).arg(loc.x()).arg(loc.y()));
    }
private:
    QTimer m_timer;
    QWidget *m_w;
    QCursor m_cursor1;
    QCursor m_cursor2;
    QTreeWidgetItem *m_item;
};


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
        
    QPixmap pm(1,1);
    pm.fill(Qt::red);
    QCursor redCursor(pm, 0, 0);

    pm.fill(Qt::blue);
    QCursor blueCursor(pm, 0, 0);

    QTreeWidget *treeWidget = new QTreeWidget();
    treeWidget->move(100,100);
    treeWidget->show();
    treeWidget->header()->hide();
    treeWidget->setCursor(redCursor);
    treeWidget->resize(400,200);

    QTreeWidgetItem * top = new QTreeWidgetItem(QStringList() << "TopLevel");
    treeWidget->addTopLevelItem(top);

    Watcher watcher(treeWidget->viewport(), QCursor(Qt::CrossCursor), blueCursor, top);

    return a.exec();
}

#include "main.moc"