Controls: Bypass bindings when setting x and y in resizeBackground

Using setX() and setY() instead can remove the binding for them.

Fixes: QTBUG-120033
Pick-to: 6.7 6.5 6.2
Change-Id: I77fc5360b2d10436b5e258b5f0ceb96b949eccbe
Reviewed-by: Ulf Hermann <[email protected]>

2 files changed, 42 insertions, 2 deletions

diff --git a/src/quicktemplates/qquickcontrol.cpp b/src/quicktemplates/qquickcontrol.cpp
index d820eac071..72d298d0af 100644
--- a/src/quicktemplates/qquickcontrol.cpp
+++ b/src/quicktemplates/qquickcontrol.cpp
@@ -335,12 +335,22 @@ void QQuickControlPrivate::resizeBackground()
     bool changeHeight = false;
     if (((!p->widthValid() || !extra.isAllocated() || !extra->hasBackgroundWidth) && qFuzzyIsNull(background->x()))
             || (extra.isAllocated() && (extra->hasLeftInset || extra->hasRightInset))) {
-        background->setX(getLeftInset());
+        const auto leftInset = getLeftInset();
+        if (!qt_is_nan(leftInset) && p->x.valueBypassingBindings() != leftInset) {
+            // We bypass the binding here to prevent it from being removed
+            p->x.setValueBypassingBindings(leftInset);
+            p->dirty(DirtyType::Position);
+        }
         changeWidth = !p->width.hasBinding();
     }
     if (((!p->heightValid() || !extra.isAllocated() || !extra->hasBackgroundHeight) && qFuzzyIsNull(background->y()))
             || (extra.isAllocated() && (extra->hasTopInset || extra->hasBottomInset))) {
-        background->setY(getTopInset());
+        const auto topInset = getTopInset();
+        if (!qt_is_nan(topInset) && p->y.valueBypassingBindings() != topInset) {
+            // We bypass the binding here to prevent it from being removed
+            p->y.setValueBypassingBindings(topInset);
+            p->dirty(DirtyType::Position);
+        }
         changeHeight = !p->height.hasBinding();
     }
     if (changeHeight || changeWidth) {
diff --git a/tests/auto/quickcontrols/controls/data/tst_control.qml b/tests/auto/quickcontrols/controls/data/tst_control.qml
index 71dcd7645e..a3e65f2b0f 100644
--- a/tests/auto/quickcontrols/controls/data/tst_control.qml
+++ b/tests/auto/quickcontrols/controls/data/tst_control.qml
@@ -467,6 +467,36 @@ TestCase {
     }
 
     Component {
+        id: backgroundTest2
+        Button {
+            id: btn
+            width: 100
+            height: 100
+            topInset: 0
+            objectName: ""
+
+            background: Rectangle {
+                id: bg
+                implicitHeight: 80
+                border.color: "red"
+                y: btn.objectName === "aaa" ? 20 : 0
+            }
+        }
+    }
+
+    // QTBUG-120033: Make sure that the binding for y on the tab button's background doesn't get removed
+    function test_background2() {
+        let button = createTemporaryObject(backgroundTest2, testCase)
+        verify(button)
+
+        verify(button.background.y === 0)
+        button.objectName = "aaa"
+        verify(button.background.y === 20)
+        button.objectName = ""
+        verify(button.background.y === 0)
+    }
+
+    Component {
         id: component2
         T.Control {
             id: item2