#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QtTest/QtTest>

class OverrideSelectedItem : public QGraphicsLineItem
{
public:
    OverrideSelectedItem(QGraphicsItem *parent = 0) :
        QGraphicsLineItem(parent),
        _overrideSelected(false)
    {
    }

    bool isOverrideSelected() { return _overrideSelected; }
    void setOverrideSelected(bool selected) { _overrideSelected = selected; }

protected:
    QVariant itemChange(GraphicsItemChange change, const QVariant &value)
    {
        if (change == ItemSelectedChange)
        {
            return _overrideSelected;
        }
        return QGraphicsItem::itemChange(change, value);
    }

private:
    bool _overrideSelected;
};

class TestOverrideSelectedItem : public QObject
{
    Q_OBJECT

private slots:

    void testClearSelection()
    {
        QGraphicsScene scene;
        OverrideSelectedItem *item = new OverrideSelectedItem;
        item->setFlag(QGraphicsItem::ItemIsSelectable, true);
        scene.addItem(item);

        // force selection of item
        item->setOverrideSelected(true);

        item->setSelected(true);
        QCOMPARE(scene.selectedItems().count(), 1);	

        // setSelected(false) is overridden to true in itemChange,
        // selectedItems() erroneously is cleared, it should contain item
        scene.clearSelection();

        // selection state is not changed
        QVERIFY(item->isSelected());

        // item with overridden selection state should not be removed
        QCOMPARE(scene.selectedItems().count(), 1); // fails
    }

};


QTEST_MAIN(TestOverrideSelectedItem)
#include "TestOverrideSelectedItem.moc"