qt-everywhere-src-5.15.1/qtx11extras/src/x11extras/qx11info_x11.h

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#ifndef QX11INFO_X11_H
#define QX11INFO_X11_H

#include <QtCore/qnamespace.h>
#include "QtX11Extras/qtx11extrasglobal.h"

#include <xcb/xcb.h>

typedef struct _XDisplay Display;

QT_BEGIN_NAMESPACE

class Q_X11EXTRAS_EXPORT QX11Info
{
public:
    enum PeekOption {
        PeekDefault = 0,
        PeekFromCachedIndex = 1
    };
    Q_DECLARE_FLAGS(PeekOptions, PeekOption)

    static bool isPlatformX11();

    static int appDpiX(int screen=-1);
    static int appDpiY(int screen=-1);

#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    static unsigned long appRootWindow(int screen=-1);
#else
    static quint32 appRootWindow(int screen=-1);
#endif
    static int appScreen();

    static unsigned long appTime();
    static unsigned long appUserTime();

    static void setAppTime(unsigned long time);
    static void setAppUserTime(unsigned long time);

    static unsigned long getTimestamp();

    static QByteArray nextStartupId();
    static void setNextStartupId(const QByteArray &id);

    static Display *display();
    static xcb_connection_t *connection();

    static bool isCompositingManagerRunning(int screen = -1);

    static qint32 generatePeekerId();
    static bool removePeekerId(qint32 peekerId);
    typedef bool (*PeekerCallback)(xcb_generic_event_t *event, void *peekerData);
    static bool peekEventQueue(PeekerCallback peeker, void *peekerData = nullptr,
                               PeekOptions option = PeekDefault, qint32 peekerId = -1);

private:
    QX11Info();
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QX11Info::PeekOptions)

QT_END_NAMESPACE

#endif // QX11INFO_X11_H