Fix softkeys for QDialogButtonBoxes created without a parent.

Inthe case where a QDialogButtonBox was created without a parent, for
example in the FTP example, the softkeys that are automatically created
inside the button box were not being added to the right widget when the
button box was given a parent (or added to a layout) later.

This patch resolves that issue by handling the ParentChange event and
then adding the softkeys at this point.

Task-number: QTBUG-6086
Reviewed-by: axis

2 files changed, 68 insertions, 16 deletions

diff --git a/src/gui/widgets/qdialogbuttonbox.cpp b/src/gui/widgets/qdialogbuttonbox.cpp
index 2ee5751..0e859f1 100644
--- a/src/gui/widgets/qdialogbuttonbox.cpp
+++ b/src/gui/widgets/qdialogbuttonbox.cpp
@@ -1215,6 +1215,30 @@ bool QDialogButtonBox::event(QEvent *event)
     }else if (event->type() == QEvent::LanguageChange) {
         d->retranslateStrings();
     }
+#ifdef QT_SOFTKEYS_ENABLED
+    else if (event->type() == QEvent::ParentChange) {
+        QWidget *dialog = 0;
+        QWidget *p = this;
+        while (p && !p->isWindow()) {
+            p = p->parentWidget();
+            if ((dialog = qobject_cast<QDialog *>(p)))
+                break;
+        }
+
+        // If the parent changes, then move the softkeys
+        for (QHash<QAbstractButton *, QAction *>::const_iterator it = d->softKeyActions.constBegin();
+            it != d->softKeyActions.constEnd(); ++it) {
+            QAction *current = it.value();
+            QList<QWidget *> widgets = current->associatedWidgets();
+            foreach (QWidget *w, widgets)
+                w->removeAction(current);
+            if (dialog)
+                dialog->addAction(current);
+            else
+                addAction(current);
+        }
+    }
+#endif
 
     return QWidget::event(event);
 }
diff --git a/tests/auto/qdialogbuttonbox/tst_qdialogbuttonbox.cpp b/tests/auto/qdialogbuttonbox/tst_qdialogbuttonbox.cpp
index 936ebf7..2c49fc8 100644
--- a/tests/auto/qdialogbuttonbox/tst_qdialogbuttonbox.cpp
+++ b/tests/auto/qdialogbuttonbox/tst_qdialogbuttonbox.cpp
@@ -111,6 +111,9 @@ private slots:
     void testDefaultButton_data();
     void testDefaultButton();
     void testS60SoftKeys();
+#ifdef QT_SOFTKEYS_ENABLED
+    void testSoftKeyReparenting();
+#endif
 
     void task191642_default();
 private:
@@ -715,6 +718,17 @@ void tst_QDialogButtonBox::testDefaultButton_data()
     QTest::newRow("third accept explicit after add") << 0 << 2 << 2;
 }
 
+static int softKeyCount(QWidget *widget)
+{
+    int softkeyCount = 0;
+    QList<QAction *> actions = widget->actions();
+    foreach (QAction *action, actions) {
+        if (action->softKeyRole() != QAction::NoSoftKey)
+            softkeyCount++;
+    }
+    return softkeyCount;
+}
+
 void tst_QDialogButtonBox::testS60SoftKeys()
 {
 #ifdef Q_WS_S60
@@ -722,33 +736,47 @@ void tst_QDialogButtonBox::testS60SoftKeys()
     QDialogButtonBox buttonBox(&dialog);
     buttonBox.setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     dialog.show();
-    
-    int softkeyCount = 0;
-    QList<QAction *> actions = dialog.actions();
-    foreach (QAction *action, actions) {
-        if (action->softKeyRole() != QAction::NoSoftKey)
-            softkeyCount++;
-    }
-    QCOMPARE( softkeyCount, 2);
+
+    QCOMPARE( softKeyCount(&dialog), 2);
 
     QDialog dialog2(0);
     QDialogButtonBox buttonBox2(&dialog2);
     buttonBox2.setStandardButtons(QDialogButtonBox::Cancel);
     dialog2.show();
 
-    int softkeyCount2 = 0;
-    QList<QAction *> actions2 = dialog2.actions();
-    foreach (QAction *action, actions2) {
-        if (action->softKeyRole() != QAction::NoSoftKey)
-            softkeyCount2++;
-    }
-    QCOMPARE( softkeyCount2, 1);
-    
+    QCOMPARE( softKeyCount(&dialog2), 1);
+
 #else
     QSKIP("S60-specific test", SkipAll );
 #endif
 }
 
+#ifdef QT_SOFTKEYS_ENABLED
+void tst_QDialogButtonBox::testSoftKeyReparenting()
+{
+    QDialog dialog;
+    QDialogButtonBox *buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(QDialogButtonBox::Ok);
+    buttonBox->addButton(QDialogButtonBox::Cancel);
+
+    QCOMPARE(softKeyCount(&dialog), 0);
+    QCOMPARE(softKeyCount(buttonBox), 2);
+
+    // Were the softkeys re-parented correctly?
+    dialog.setLayout(new QVBoxLayout);
+    dialog.layout()->addWidget(buttonBox);
+    QCOMPARE(softKeyCount(&dialog), 2);
+    QCOMPARE(softKeyCount(buttonBox), 0);
+
+    // Softkeys are only added to QDialog, not QWidget
+    QWidget *nested = new QWidget;
+    nested->setLayout(new QVBoxLayout);
+    nested->layout()->addWidget(buttonBox);
+    QCOMPARE(softKeyCount(nested), 0);
+    QCOMPARE(softKeyCount(buttonBox), 2);
+}
+#endif
+
 void tst_QDialogButtonBox::testDefaultButton()
 {
     QFETCH(int, whenToSetDefault);