qquickplaceholdertext.cpp

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// 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"