void tst_QFormLayout::replaceWidget()
{
QWidget w;
QFormLayout *layout = new QFormLayout();
w.setLayout(layout);
QLineEdit *edit1 = new QLineEdit();
QLineEdit *edit2 = new QLineEdit();
QLineEdit *edit3 = new QLineEdit();
QLabel *label1 = new QLabel();
QLabel *label2 = new QLabel();
layout->addRow("Label", edit1);
layout->addRow(label1, edit2);
// Verify controls not in layout
QCOMPARE(layout->indexOf(edit3), -1);
QCOMPARE(layout->indexOf(label2), -1);
// Verify controls in layout
int editIndex = layout->indexOf(edit1);
int labelIndex = layout->indexOf(label1);
QVERIFY(editIndex > 0);
QVERIFY(labelIndex > 0);
int rownum;
QFormLayout::ItemRole role;
// replace editor
layout->replaceWidget(edit1, edit3);
edit1->hide(); // Not strictly needed for the test, but for normal usage it is.
QCOMPARE(layout->indexOf(edit1), -1);
QCOMPARE(layout->indexOf(edit3), editIndex);
QCOMPARE(layout->indexOf(label1), labelIndex);
rownum = -1;
role = QFormLayout::SpanningRole;
layout->getWidgetPosition(edit3, &rownum, &role);
QCOMPARE(rownum, 0);
QCOMPARE(role, QFormLayout::FieldRole);
layout->replaceWidget(label1, label2);
label1->hide();
QCOMPARE(layout->indexOf(label1), -1);
QCOMPARE(layout->indexOf(label2), labelIndex);
layout->getWidgetPosition(label2, &rownum, &role);
QCOMPARE(rownum, 1);
QCOMPARE(role, QFormLayout::LabelRole);
}