TableView: connect to 'layoutChanged' signal from the model

Ensure we rebuild the table when the model emits 'layoutChanged'.

Fixes: QTBUG-71140
Change-Id: I70dac897830bf5a12ae6987920e388743fd358a1
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 39 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicktableview/tst_qquicktableview.cpp b/tests/auto/quick/qquicktableview/tst_qquicktableview.cpp
index 38789fd7bf..d475ef9c4d 100644
--- a/tests/auto/quick/qquicktableview/tst_qquicktableview.cpp
+++ b/tests/auto/quick/qquicktableview/tst_qquicktableview.cpp
@@ -141,6 +141,7 @@ private slots:
     void flickOvershoot();
     void checkRowColumnCount();
     void modelSignals();
+    void checkModelSignalsUpdateLayout();
     void dataChangedSignal();
     void checkThatPoolIsDrainedWhenReuseIsFalse();
     void checkIfDelegatesAreReused_data();
@@ -1472,6 +1473,44 @@ void tst_QQuickTableView::modelSignals()
     QCOMPARE(tableView->columns(), 1);
 }
 
+void tst_QQuickTableView::checkModelSignalsUpdateLayout()
+{
+    // Check that if the model rearranges rows and emit the
+    // 'layoutChanged' signal, TableView will be updated correctly.
+    LOAD_TABLEVIEW("plaintableview.qml");
+
+    TestModel model(0, 1);
+    tableView->setModel(QVariant::fromValue(&model));
+    WAIT_UNTIL_POLISHED;
+
+    QCOMPARE(tableView->rows(), 0);
+    QCOMPARE(tableView->columns(), 1);
+
+    QString modelRow1Text = QStringLiteral("firstRow");
+    QString modelRow2Text = QStringLiteral("secondRow");
+    model.insertRow(0);
+    model.insertRow(0);
+    model.setModelData(QPoint(0, 0), QSize(1, 1), modelRow1Text);
+    model.setModelData(QPoint(0, 1), QSize(1, 1), modelRow2Text);
+    WAIT_UNTIL_POLISHED;
+
+    QCOMPARE(tableView->rows(), 2);
+    QCOMPARE(tableView->columns(), 1);
+
+    QString delegate1text = tableViewPrivate->loadedTableItem(QPoint(0, 0))->item->property("modelDataBinding").toString();
+    QString delegate2text = tableViewPrivate->loadedTableItem(QPoint(0, 1))->item->property("modelDataBinding").toString();
+    QCOMPARE(delegate1text, modelRow1Text);
+    QCOMPARE(delegate2text, modelRow2Text);
+
+    model.swapRows(0, 1);
+    WAIT_UNTIL_POLISHED;
+
+    delegate1text = tableViewPrivate->loadedTableItem(QPoint(0, 0))->item->property("modelDataBinding").toString();
+    delegate2text = tableViewPrivate->loadedTableItem(QPoint(0, 1))->item->property("modelDataBinding").toString();
+    QCOMPARE(delegate1text, modelRow2Text);
+    QCOMPARE(delegate2text, modelRow1Text);
+}
+
 void tst_QQuickTableView::dataChangedSignal()
 {
     // Check that bindings to the model inside a delegate gets updated