QQuickText{Edit,Input}: Reset selection when becoming readOnly.

When read only, controls may not be edited or altered, and indeed, a read-only
control cannot acquire a selection (as it cannot be interacted with).
Leaving an existing selection breaks that implication, so clear it when becoming
read-only.

[ChangeLog][QtQuick][TextEdit/TextInput] If a control has a selection, it is now
cleared when becoming read-only.

Task-number: QTBUG-51115
Change-Id: Ife43b97ee3d6b780f09a938868c3ccb2f1b6e6e7
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

src/quick/items/qquicktextedit.cpp

@@ -1534,8 +1534,7 @@ void QQuickTextEdit::setReadOnly(bool r)
     if (!r)
         flags = flags | Qt::TextEditable;
     d->control->setTextInteractionFlags(flags);
-    if (!r)
-        d->control->moveCursor(QTextCursor::End);
+    d->control->moveCursor(QTextCursor::End);
 
 #ifndef QT_NO_IM
     updateInputMethod(Qt::ImEnabled);

src/quick/items/qquicktextinput.cpp

@@ -679,8 +679,7 @@ void QQuickTextInput::setReadOnly(bool ro)
     setFlag(QQuickItem::ItemAcceptsInputMethod, !ro);
 #endif
     d->m_readOnly = ro;
-    if (!ro)
-        d->setCursorPosition(d->end());
+    d->setCursorPosition(d->end());
 #ifndef QT_NO_IM
     updateInputMethod(Qt::ImEnabled);
 #endif

tests/auto/quick/qquicktextedit/data/qtbug51115.qml

@@ -0,0 +1,11 @@
+import QtQuick 2.0
+
+TextEdit {
+    Component.onCompleted: {
+        readOnly = false;
+        text= "bla bla";
+        selectAll();
+        readOnly = true;
+    }
+}
+

tests/auto/quick/qquicktextedit/tst_qquicktextedit.cpp

@@ -201,6 +201,7 @@ private slots:
     void doubleSelect_QTBUG_38704();
 
     void padding();
+    void QTBUG_51115_readOnlyResetsSelection();
 
 private:
     void simulateKeys(QWindow *window, const QList<Key> &keys);
@@ -5536,6 +5537,17 @@ void tst_qquicktextedit::padding()
     delete root;
 }
 
+void tst_qquicktextedit::QTBUG_51115_readOnlyResetsSelection()
+{
+    QQuickView view;
+    view.setSource(testFileUrl("qtbug51115.qml"));
+    view.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&view));
+    QQuickTextEdit *obj = qobject_cast<QQuickTextEdit*>(view.rootObject());
+
+    QCOMPARE(obj->selectedText(), QString());
+}
+
 QTEST_MAIN(tst_qquicktextedit)
 
 #include "tst_qquicktextedit.moc"

tests/auto/quick/qquicktextinput/data/qtbug51115.qml

@@ -0,0 +1,11 @@
+import QtQuick 2.0
+
+TextInput {
+    Component.onCompleted: {
+        readOnly = false;
+        text= "bla bla";
+        selectAll();
+        readOnly = true;
+    }
+}
+

tests/auto/quick/qquicktextinput/tst_qquicktextinput.cpp

@@ -221,6 +221,8 @@ private slots:
     void ensureVisible();
     void padding();
 
+    void QTBUG_51115_readOnlyResetsSelection();
+
 private:
     void simulateKey(QWindow *, int key);
 
@@ -6697,6 +6699,17 @@ void tst_qquicktextinput::padding()
     delete root;
 }
 
+void tst_qquicktextinput::QTBUG_51115_readOnlyResetsSelection()
+{
+    QQuickView view;
+    view.setSource(testFileUrl("qtbug51115.qml"));
+    view.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&view));
+    QQuickTextInput *obj = qobject_cast<QQuickTextInput*>(view.rootObject());
+
+    QCOMPARE(obj->selectedText(), QString());
+}
+
 QTEST_MAIN(tst_qquicktextinput)
 
 #include "tst_qquicktextinput.moc"