1 files changed, 57 insertions, 0 deletions
diff --git a/src/quickcontrolsimpl/qquickplaceholdertext.cpp b/src/quickcontrolsimpl/qquickplaceholdertext.cpp
new file mode 100644
index 0000000000..4a1fb0db00
--- /dev/null
+++ b/src/quickcontrolsimpl/qquickplaceholdertext.cpp
@@ -0,0 +1,57 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qquickplaceholdertext_p.h"
+
+#include <QtQuick/private/qquicktext_p_p.h>
+#include <QtQuick/private/qquicktextinput_p_p.h>
+#include <QtQuick/private/qquicktextedit_p_p.h>
+
+QT_BEGIN_NAMESPACE
+
+QQuickPlaceholderText::QQuickPlaceholderText(QQuickItem *parent) : QQuickText(parent)
+{
+}
+
+void QQuickPlaceholderText::componentComplete()
+{
+    QQuickText::componentComplete();
+
+    auto control = textControl();
+    if (control)
+        connect(control, SIGNAL(effectiveHorizontalAlignmentChanged()), this, SLOT(updateAlignment()));
+    updateAlignment();
+}
+
+/*!
+    \internal
+
+     The control that we're representing. This exists because
+     parentItem() is not always the control - it may be a Flickable
+     in the case of TextArea.
+*/
+QQuickItem *QQuickPlaceholderText::textControl() const
+{
+    return qobject_cast<QQuickItem *>(parent());
+}
+
+void QQuickPlaceholderText::updateAlignment()
+{
+    if (QQuickTextInput *input = qobject_cast<QQuickTextInput *>(parentItem())) {
+        if (QQuickTextInputPrivate::get(input)->hAlignImplicit)
+            resetHAlign();
+        else
+            setHAlign(static_cast<HAlignment>(input->hAlign()));
+    } else if (QQuickTextEdit *edit = qobject_cast<QQuickTextEdit *>(parentItem())) {
+        if (QQuickTextEditPrivate::get(edit)->hAlignImplicit)
+            resetHAlign();
+        else
+            setHAlign(static_cast<HAlignment>(edit->hAlign()));
+    } else {
+        resetHAlign();
+    }
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickplaceholdertext_p.cpp"