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#ifndef QDIALOGBUTTONBOX_H
#define QDIALOGBUTTONBOX_H

#include <QtWidgets/qwidget.h>

QT_BEGIN_NAMESPACE


class QAbstractButton;
class QPushButton;
class QDialogButtonBoxPrivate;

class Q_WIDGETS_EXPORT QDialogButtonBox : public QWidget
{
    Q_OBJECT
    Q_FLAGS(StandardButtons)
    Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation)
    Q_PROPERTY(StandardButtons standardButtons READ standardButtons WRITE setStandardButtons)
    Q_PROPERTY(bool centerButtons READ centerButtons WRITE setCenterButtons)

public:
    enum ButtonRole {
        // keep this in sync with QMessageBox::ButtonRole and QPlatformDialogHelper::ButtonRole
        InvalidRole = -1,
        AcceptRole,
        RejectRole,
        DestructiveRole,
        ActionRole,
        HelpRole,
        YesRole,
        NoRole,
        ResetRole,
        ApplyRole,

        NRoles
    };

    enum StandardButton {
        // keep this in sync with QMessageBox::StandardButton and QPlatformDialogHelper::StandardButton
        NoButton           = 0x00000000,
        Ok                 = 0x00000400,
        Save               = 0x00000800,
        SaveAll            = 0x00001000,
        Open               = 0x00002000,
        Yes                = 0x00004000,
        YesToAll           = 0x00008000,
        No                 = 0x00010000,
        NoToAll            = 0x00020000,
        Abort              = 0x00040000,
        Retry              = 0x00080000,
        Ignore             = 0x00100000,
        Close              = 0x00200000,
        Cancel             = 0x00400000,
        Discard            = 0x00800000,
        Help               = 0x01000000,
        Apply              = 0x02000000,
        Reset              = 0x04000000,
        RestoreDefaults    = 0x08000000,

#ifndef Q_MOC_RUN
        FirstButton        = Ok,
        LastButton         = RestoreDefaults
#endif
    };

    Q_DECLARE_FLAGS(StandardButtons, StandardButton)

    enum ButtonLayout {
        // keep this in sync with QMessageBox::ButtonLayout and QPlatformDialogHelper::ButtonLayout
        WinLayout,
        MacLayout,
        KdeLayout,
        GnomeLayout
    };

    QDialogButtonBox(QWidget *parent = Q_NULLPTR);
    QDialogButtonBox(Qt::Orientation orientation, QWidget *parent = Q_NULLPTR);
    explicit QDialogButtonBox(StandardButtons buttons, QWidget *parent = Q_NULLPTR);
    QDialogButtonBox(StandardButtons buttons, Qt::Orientation orientation,
                     QWidget *parent = Q_NULLPTR);
    ~QDialogButtonBox();

    void setOrientation(Qt::Orientation orientation);
    Qt::Orientation orientation() const;

    void addButton(QAbstractButton *button, ButtonRole role);
    QPushButton *addButton(const QString &text, ButtonRole role);
    QPushButton *addButton(StandardButton button);
    void removeButton(QAbstractButton *button);
    void clear();

    QList<QAbstractButton *> buttons() const;
    ButtonRole buttonRole(QAbstractButton *button) const;

    void setStandardButtons(StandardButtons buttons);
    StandardButtons standardButtons() const;
    StandardButton standardButton(QAbstractButton *button) const;
    QPushButton *button(StandardButton which) const;

    void setCenterButtons(bool center);
    bool centerButtons() const;

Q_SIGNALS:
    void clicked(QAbstractButton *button);
    void accepted();
    void helpRequested();
    void rejected();

protected:
    void changeEvent(QEvent *event) Q_DECL_OVERRIDE;
    bool event(QEvent *event) Q_DECL_OVERRIDE;

private:
    Q_DISABLE_COPY(QDialogButtonBox)
    Q_DECLARE_PRIVATE(QDialogButtonBox)
    Q_PRIVATE_SLOT(d_func(), void _q_handleButtonClicked())
    Q_PRIVATE_SLOT(d_func(), void _q_handleButtonDestroyed())
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QDialogButtonBox::StandardButtons)

QT_END_NAMESPACE

#endif // QDIALOGBUTTONBOX_H
