2 files changed, 156 insertions, 0 deletions
diff --git a/tests/auto/quick/qquickgridview/data/qtbug57225.qml b/tests/auto/quick/qquickgridview/data/qtbug57225.qml
new file mode 100644
index 0000000000..3871e5d273
--- /dev/null
+++ b/tests/auto/quick/qquickgridview/data/qtbug57225.qml
@@ -0,0 +1,95 @@
+import QtQuick 2.0
+
+Rectangle {
+    id: root
+    width: 200
+    height: 200
+
+    property int duration: 100
+    property int count: grid.count
+
+    Component {
+        id: myDelegate
+        Rectangle {
+            id: wrapper
+
+            property string nameData: name
+            property bool removalStarted: false
+            property real minX: 0
+            property real minY: 0
+
+            onXChanged: if (removalStarted) grid.recordPosition(x, y)
+            onYChanged: if (removalStarted) grid.recordPosition(x, y)
+
+            objectName: "wrapper"
+            width: 80
+            height: 80
+            border.width: 1
+            Column {
+                Text { text: index }
+                Text {
+                    text: wrapper.x + ", " + wrapper.y
+                }
+                Text {
+                    id: textName
+                    objectName: "textName"
+                    text: name
+                }
+            }
+            color: GridView.isCurrentItem ? "lightsteelblue" : "white"
+
+            GridView.onRemove: SequentialAnimation {
+                PropertyAction { target: wrapper; property: "removalStarted"; value: true }
+                PropertyAction { target: wrapper; property: "GridView.delayRemove"; value: true }
+                NumberAnimation { target: wrapper; property: "scale"; to: 0.5; duration: root.duration; easing.type: Easing.InOutQuad }
+                PropertyAction { target: wrapper; property: "GridView.delayRemove"; value: false }
+                PropertyAction { target: grid; property: "animationDone"; value: true }
+            }
+
+        }
+    }
+
+    GridView {
+        id: grid
+
+        property int displaceTransitionsDone: 0
+        property bool animationDone: false
+        property point minimumPosition: Qt.point(0, 0)
+
+        signal delegateMoved(real x, real y)
+
+        objectName: "grid"
+        focus: true
+        anchors.fill: parent
+        cacheBuffer: 0
+        cellWidth: 80
+        cellHeight: 80
+        model: testModel
+        delegate: myDelegate
+
+        displaced: Transition {
+            id: transition
+            SequentialAnimation {
+                NumberAnimation {
+                    properties: "x,y"
+                    duration: root.duration
+                    easing.type: Easing.OutBounce
+                }
+                ScriptAction { script: grid.displaceTransitionsDone += 1 }
+            }
+        }
+
+        function recordPosition(index, x, y) {
+            if (x < minimumPosition.x || y < minimumPosition.y) {
+                minimumPosition = Qt.point(x, y)
+            }
+        }
+    }
+
+    Rectangle {
+        anchors.fill: grid
+        color: "lightsteelblue"
+        opacity: 0.2
+    }
+}
+
diff --git a/tests/auto/quick/qquickgridview/tst_qquickgridview.cpp b/tests/auto/quick/qquickgridview/tst_qquickgridview.cpp
index 2b14842658..388ecc2ab8 100644
--- a/tests/auto/quick/qquickgridview/tst_qquickgridview.cpp
+++ b/tests/auto/quick/qquickgridview/tst_qquickgridview.cpp
@@ -153,6 +153,8 @@ private slots:
     void multipleTransitions();
     void multipleTransitions_data();
     void multipleDisplaced();
+    void regression_QTBUG_57225();
+    void regression_QTBUG_57225_data();
 
     void inserted_leftToRight_RtL_TtB();
     void inserted_leftToRight_RtL_TtB_data();
@@ -5798,6 +5800,65 @@ void tst_QQuickGridView::multipleDisplaced()
     delete window;
 }
 
+void tst_QQuickGridView::regression_QTBUG_57225()
+{
+    QFETCH(int, initialCount);
+    QFETCH(int, removeIndex);
+    QFETCH(int, removeCount);
+    QFETCH(int, expectedDisplaceTransitions);
+
+    // deleting all visible items should not cause a repositioning of said items.
+
+    QaimModel model;
+    for (int i = 0; i < initialCount; i++)
+        model.addItem("Original item" + QString::number(i), "");
+
+    QQuickView *window = createView();
+    QQmlContext *ctxt = window->rootContext();
+    ctxt->setContextProperty("testModel", &model);
+    window->setSource(testFileUrl("qtbug57225.qml"));
+    window->show();
+    QVERIFY(QTest::qWaitForWindowExposed(window));
+
+    QQuickGridView *gridview = findItem<QQuickGridView>(window->rootObject(), "grid");
+    QVERIFY(gridview != 0);
+    QTRY_COMPARE(QQuickItemPrivate::get(gridview)->polishScheduled, false);
+
+    model.removeItems(removeIndex, removeCount);
+    QTRY_VERIFY(gridview->property("animationDone").toBool());
+
+    // verify that none of the removed items has moved to a negative position
+    QPoint minimumPosition = gridview->property("minimumPosition").toPoint();
+    QVERIFY(minimumPosition.x() >= 0);
+    QVERIFY(minimumPosition.y() >= 0);
+
+    // wait some more time to let the displaced transition happen
+    QTest::qWait(window->rootObject()->property("duration").toInt());
+    QTRY_VERIFY2(gridview->property("displaceTransitionsDone").toInt() >= expectedDisplaceTransitions,
+                 QByteArray::number(gridview->property("displaceTransitionsDone").toInt()).constData());
+
+    delete window;
+}
+
+void tst_QQuickGridView::regression_QTBUG_57225_data()
+{
+    QTest::addColumn<int>("initialCount");
+    QTest::addColumn<int>("removeIndex");
+    QTest::addColumn<int>("removeCount");
+    QTest::addColumn<int>("expectedDisplaceTransitions");
+
+    // no displace transitions should happen
+    QTest::newRow("remove all visible items") <<
+        20 << 0 << 8 << 0;
+
+    // check that the removal animation is performed
+    QTest::newRow("remove items in between") <<
+        20 << 1 << 2 << 3;
+
+    QTest::newRow("remove items in between - 2") <<
+        20 << 2 << 3 << 1;
+}
+
 void tst_QQuickGridView::cacheBuffer()
 {
     QQuickView *window = createView();