Detailed Description
The QX11Info class provides information about the X display configuration.
The class provides two APIs: a set of non-static functions that provide information about a specific widget or pixmap, and a set of static functions that provide the default information for the application.
Warning: This class is only available on X11. For querying per-screen information in a portable way, use QDesktopWidget.
See also QWidget::x11Info(), QPixmap::x11Info(), and QDesktopWidget.
Member Function Documentation
QX11Info::QX11Info ()
Constructs an empty QX11Info object.
QX11Info::QX11Info ( const QX11Info & other )
Constructs a copy of other.
QX11Info::~QX11Info ()
Destroys the QX11Info object.
int QX11Info::appCells ( int screen = -1 ) [static]
Returns the number of cells used by the application on the given screen.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also cells().
const char * QX11Info::appClass () [static]
Returns the X11 application class.
See also display().
Qt::HANDLE QX11Info::appColormap ( int screen = -1 ) [static]
Returns a handle for the application's color map on the given screen.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also colormap() and defaultColormap().
bool QX11Info::appDefaultColormap ( int screen = -1 ) [static]
Returns true if the application has a default color map on the given screen; otherwise returns false.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
bool QX11Info::appDefaultVisual ( int screen = -1 ) [static]
Returns true if the application has a default visual on the given screen; otherwise returns false.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
int QX11Info::appDepth ( int screen = -1 ) [static]
Returns the color depth (bits per pixel) used by the application on the given screen.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also depth().
int QX11Info::appDpiX ( int screen = -1 ) [static]
Returns the horizontal resolution of the given screen in terms of the number of dots per inch.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also setAppDpiX() and appDpiY().
int QX11Info::appDpiY ( int screen = -1 ) [static]
Returns the vertical resolution of the given screen in terms of the number of dots per inch.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also setAppDpiY() and appDpiX().
Qt::HANDLE QX11Info::appRootWindow ( int screen = -1 ) [static]
Returns a handle for the applications root window on the given screen.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also QApplication::desktop().
int QX11Info::appScreen () [static]
Returns the number of the screen where the application is being displayed.
See also display() and screen().
unsigned long QX11Info::appTime () [static]
Returns the X11 time.
See also setAppTime() and appUserTime().
unsigned long QX11Info::appUserTime () [static]
Returns the X11 user time.
See also setAppUserTime() and appTime().
void * QX11Info::appVisual ( int screen = -1 ) [static]
Returns the current visual used by the application on the given screen.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also visual() and defaultVisual().
int QX11Info::cells () const
Returns the number of cells.
See also appCells().
Qt::HANDLE QX11Info::colormap () const
Returns a handle for the color map.
See also defaultColormap().
bool QX11Info::defaultColormap () const
Returns true if there is a default color map; otherwise returns false.
See also colormap().
bool QX11Info::defaultVisual () const
Returns true if there is a default visual; otherwise returns false.
See also visual() and appVisual().
int QX11Info::depth () const
Returns the color depth (bits per pixel) of the X display.
See also appDepth().
Display * QX11Info::display () [static]
Returns the default display for the application.
See also appScreen().
bool QX11Info::isCompositingManagerRunning () [static]
Returns true if there is a compositing manager running.
This function was introduced in Qt 4.4.
int QX11Info::screen () const
Returns the number of the screen currently in use.
The return value is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also appScreen().
void QX11Info::setAppDpiX ( int screen, int xdpi ) [static]
Sets the horizontal resolution of the given screen to the number of dots per inch specified by xdpi.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also appDpiX() and setAppDpiY().
void QX11Info::setAppDpiY ( int screen, int ydpi ) [static]
Sets the vertical resolution of the given screen to the number of dots per inch specified by ydpi.
The screen argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use QDesktopWidget to query for information about Xinerama screens.
See also appDpiY() and setAppDpiX().
void QX11Info::setAppTime ( unsigned long time ) [static]
Sets the X11 time to the value specified by time.
See also appTime() and setAppUserTime().
void QX11Info::setAppUserTime ( unsigned long time ) [static]
Sets the X11 user time as specified by time.
See also appUserTime() and setAppTime().
void * QX11Info::visual () const
Returns the current visual.
See also appVisual() and defaultVisual().
QX11Info & QX11Info::operator= ( const QX11Info & other )
Assigns other to this object and returns a reference to this object.
