qquickplatformmessagedialog.cpp

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// Copyright (C) 2021 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 "qquickplatformmessagedialog_p.h"
 
#include <QtQuickTemplates2/private/qquickpopup_p_p.h>
#include <QtQuickTemplates2/private/qquickpopupanchors_p.h>
 
#include "qquickmessagedialogimpl_p.h"
 
QT_BEGIN_NAMESPACE
 
Q_LOGGING_CATEGORY(lcQuickPlatformMessageDialog, "qt.quick.dialogs.quickplatformmessagedialog")
 
QQuickPlatformMessageDialog::QQuickPlatformMessageDialog(QObject *parent)
{
    qCDebug(lcQuickPlatformMessageDialog)
            << "creating non-native Qt Quick MessageDialog with parent" << parent;
 
    // Set a parent so that we get deleted if we can't be shown for whatever reason.
    // Our eventual parent should be the window, though.
    setParent(parent);
 
    auto qmlContext = ::qmlContext(parent);
    if (!qmlContext) {
        qmlWarning(parent) << "No QQmlContext for QQuickPlatformMessageDialog; can't create "
                              "non-native MessageDialog implementation";
        return;
    }
 
    const auto dialogQmlUrl = QUrl(QStringLiteral(
            "qrc:/qt-project.org/imports/QtQuick/Dialogs/quickimpl/qml/MessageDialog.qml"));
 
    QQmlComponent messageDialogComponent(qmlContext->engine(), dialogQmlUrl, parent);
    if (!messageDialogComponent.isReady()) {
        qmlWarning(parent) << "Failed to load non-native MessageBox implementation:\n"
                           << messageDialogComponent.errorString();
        return;
    }
 
    m_dialog = qobject_cast<QQuickMessageDialogImpl *>(messageDialogComponent.create());
 
    if (!m_dialog) {
        qmlWarning(parent) << "Failed to create an instance of the non-native MessageBox:\n"
                           << messageDialogComponent.errorString();
        return;
    }
 
    m_dialog->setParent(this);
 
    connect(m_dialog, &QQuickDialog::accepted, this, &QPlatformDialogHelper::accept);
    connect(m_dialog, &QQuickDialog::rejected, this, &QPlatformDialogHelper::reject);
    connect(m_dialog, &QQuickMessageDialogImpl::buttonClicked, this,
            &QQuickPlatformMessageDialog::clicked);
}
 
void QQuickPlatformMessageDialog::exec()
{
    qCWarning(lcQuickPlatformMessageDialog)
            << "exec() is not supported for the Qt Quick MessageDialog fallback";
}
 
bool QQuickPlatformMessageDialog::show(Qt::WindowFlags flags, Qt::WindowModality modality,
                                       QWindow *parent)
{
    qCDebug(lcQuickPlatformMessageDialog)
            << "show called with flags" << flags << "modality" << modality << "parent" << parent;
    if (!m_dialog)
        return false;
 
    if (!parent)
        return false;
 
    auto quickWindow = qobject_cast<QQuickWindow *>(parent);
    if (!quickWindow) {
        qmlInfo(this->parent()) << "Parent window (" << parent
                                << ") of non-native dialog is not a QQuickWindow";
        return false;
    }
    m_dialog->setParent(parent);
    m_dialog->resetParentItem();
 
    auto popupPrivate = QQuickPopupPrivate::get(m_dialog);
    popupPrivate->getAnchors()->setCenterIn(m_dialog->parentItem());
 
    QSharedPointer<QMessageDialogOptions> options = QPlatformMessageDialogHelper::options();
    m_dialog->setTitle(options->windowTitle());
    m_dialog->setOptions(options);
 
    m_dialog->open();
    return true;
}
void QQuickPlatformMessageDialog::hide()
{
    if (isValid())
        m_dialog->close();
}
 
bool QQuickPlatformMessageDialog::isValid() const
{
    return m_dialog;
}
 
QQuickMessageDialogImpl *QQuickPlatformMessageDialog::dialog() const
{
    return m_dialog;
}
 
QT_END_NAMESPACE
 
#include "moc_qquickplatformmessagedialog_p.cpp"