qt-everywhere-src-5.15.1/qtquickcontrols/src/widgets/qmessageboxhelper_p.h

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#ifndef QMESSAGEBOXHELPER_P_H
#define QMESSAGEBOXHELPER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QMessageBox>
#include "../dialogs/qquickabstractmessagedialog_p.h"

QT_BEGIN_NAMESPACE

class QCloseableMessageBox : public QMessageBox
{
public:
    QCloseableMessageBox(QWidget *parent = 0) : QMessageBox(parent) { }

    void closeEvent(QCloseEvent *e) override {
        // QTBUG-36227: Bypass QMessageBox::closeEvent()
        QDialog::closeEvent(e);
    }

    void keyPressEvent(QKeyEvent *e) override {
        QMessageBox::keyPressEvent(e);
        // QTBUG-36227: reject on escape or cmd-period even if there's no cancel button
        if ((isVisible() && e->key() == Qt::Key_Escape)
#ifdef Q_OS_MAC
            || (e->modifiers() == Qt::ControlModifier && e->key() == Qt::Key_Period)
#endif
                )
            reject();
    }
};

class QMessageBoxHelper : public QPlatformMessageDialogHelper
{
    Q_OBJECT
public:
    QMessageBoxHelper() {
        connect(&m_dialog, SIGNAL(accepted()), this, SIGNAL(accept()));
        connect(&m_dialog, SIGNAL(rejected()), this, SIGNAL(reject()));
        connect(&m_dialog, SIGNAL(buttonClicked(QAbstractButton*)), this, SLOT(buttonClicked(QAbstractButton*)));
    }

    void exec() override { m_dialog.exec(); }

    bool show(Qt::WindowFlags f, Qt::WindowModality m, QWindow *parent) override {
        m_dialog.winId();
        QWindow *window = m_dialog.windowHandle();
        Q_ASSERT(window);
        window->setTransientParent(parent);
        window->setFlags(f);
        m_dialog.setWindowModality(m);
        m_dialog.setWindowTitle(QPlatformMessageDialogHelper::options()->windowTitle());
        m_dialog.setIcon(static_cast<QMessageBox::Icon>(QPlatformMessageDialogHelper::options()->icon()));
        if (!QPlatformMessageDialogHelper::options()->text().isNull())
            m_dialog.setText(QPlatformMessageDialogHelper::options()->text());
        if (!QPlatformMessageDialogHelper::options()->informativeText().isNull())
            m_dialog.setInformativeText(QPlatformMessageDialogHelper::options()->informativeText());
#if QT_CONFIG(textedit)
        if (!QPlatformMessageDialogHelper::options()->detailedText().isNull())
            m_dialog.setDetailedText(QPlatformMessageDialogHelper::options()->detailedText());
#endif
        m_dialog.setStandardButtons(static_cast<QMessageBox::StandardButtons>(static_cast<int>(
            QPlatformMessageDialogHelper::options()->standardButtons())));
        m_dialog.show();
        return m_dialog.isVisible();
    }

    void hide() override { m_dialog.hide(); }

    QCloseableMessageBox m_dialog;

public Q_SLOTS:
    void buttonClicked(QAbstractButton* button) {
        emit clicked(static_cast<QPlatformDialogHelper::StandardButton>(m_dialog.standardButton(button)),
            static_cast<QPlatformDialogHelper::ButtonRole>(m_dialog.buttonRole(button)));
    }
};

QT_END_NAMESPACE

#endif // QMESSAGEBOXHELPER_P_H