#include <QtGui>
#include <QTreeWidgetItem>
#include <QTreeWidget>


class tristate : public QTreeWidget
{
	Q_OBJECT

public:
	tristate(QWidget *parent = 0)
		: QTreeWidget(parent)
	{
		allDrives = new QTreeWidgetItem(this, QStringList() << QObject::tr("Drives"));
		diskC = new QTreeWidgetItem (allDrives, QStringList() << "C:"); 
		diskD = new QTreeWidgetItem (allDrives, QStringList() << "D:"); 

		allDrives->setCheckState(0,Qt::Checked);
		diskC->setCheckState(0,Qt::Checked);
		diskD->setCheckState(0,Qt::Checked);

		allDrives->setFlags(Qt::ItemIsUserCheckable |Qt::ItemIsEnabled | Qt::ItemIsTristate); 
	};


private:
	QTreeWidgetItem* allDrives; 
	QTreeWidgetItem* diskC;
	QTreeWidgetItem* diskD; 
};

#include "main.moc"

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);

	tristate t;
	t.show();

	return a.exec();
}