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NAME

       XGetWindowAttributes,  XGetGeometry,  XWindowAttributes  - get current window attribute or
       geometry and current window attributes structure

SYNTAX

       Status    XGetWindowAttributes(Display    *display,    Window     w,     XWindowAttributes
              *window_attributes_return);

       Status  XGetGeometry(Display *display, Drawable d, Window *root_return, int *x_return, int
              *y_return, unsigned int *width_return, unsigned int  *height_return,  unsigned  int
              *border_width_return, unsigned int *depth_return);

ARGUMENTS

       border_width_return
                 Returns the border width in pixels.

       d         Specifies the drawable, which can be a window or a pixmap.

       depth_return
                 Returns the depth of the drawable (bits per pixel for the object).

       display   Specifies the connection to the X server.

       root_return
                 Returns the root window.

       w         Specifies the window whose current attributes you want to obtain.

       width_return
       height_return
                 Return the drawable's dimensions (width and height).

       window_attributes_return
                 Returns the specified window's attributes in the XWindowAttributes structure.

       x_return
       y_return  Return  the x and y coordinates that define the location of the drawable.  For a
                 window, these coordinates specify the upper-left outer corner  relative  to  its
                 parent's origin.  For pixmaps, these coordinates are always zero.

DESCRIPTION

       The  XGetWindowAttributes function returns the current attributes for the specified window
       to an XWindowAttributes structure.  It returns a nonzero status on success; otherwise,  it
       returns a zero status.

       XGetWindowAttributes can generate BadDrawable and BadWindow errors.

       The  XGetGeometry  function  returns  the  root  window  and  the  current geometry of the
       drawable.  The geometry of the drawable includes  the  x  and  y  coordinates,  width  and
       height,  border  width, and depth.  These are described in the argument list.  It is legal
       to pass to this function a window whose class is InputOnly.  It returns a  nonzero  status
       on success; otherwise, it returns a zero status.

STRUCTURES

       The XWindowAttributes structure contains:

       typedef struct {
               int x, y;       /* location of window */
               int width, height;      /* width and height of window */
               int border_width;       /* border width of window */
               int depth;      /* depth of window */
               Visual *visual; /* the associated visual structure */
               Window root;    /* root of screen containing window */
               int class;      /* InputOutput, InputOnly*/
               int bit_gravity;        /* one of the bit gravity values */
               int win_gravity;        /* one of the window gravity values */
               int backing_store;      /* NotUseful, WhenMapped, Always */
               unsigned long backing_planes;   /* planes to be preserved if possible */
               unsigned long backing_pixel;    /* value to be used when restoring planes */
               Bool save_under;        /* boolean, should bits under be saved? */
               Colormap colormap;      /* color map to be associated with window */
               Bool map_installed;     /* boolean, is color map currently installed*/
               int map_state;  /* IsUnmapped, IsUnviewable, IsViewable */
               long all_event_masks;   /* set of events all people have interest in*/
               long your_event_mask;   /* my event mask */
               long do_not_propagate_mask;     /* set of events that should not propagate */
               Bool override_redirect; /* boolean value for override-redirect */
               Screen *screen; /* back pointer to correct screen */
       } XWindowAttributes;

       The x and y members are set to the upper-left outer corner relative to the parent window's
       origin.  The width and height members are set to  the  inside  size  of  the  window,  not
       including  the  border.   The  border_width  member is set to the window's border width in
       pixels.  The depth member is set to the depth of the window (that is, bits per  pixel  for
       the  object).  The visual member is a pointer to the screen's associated Visual structure.
       The root member is set to the root window of the screen containing the window.  The  class
       member is set to the window's class and can be either InputOutput or InputOnly.

       The bit_gravity member is set to the window's bit gravity and can be one of the following:

       ForgetGravity      EastGravity
       NorthWestGravity   SouthWestGravity
       NorthGravity       SouthGravity
       NorthEastGravity   SouthEastGravity
       WestGravity        StaticGravity
       CenterGravity

       The  win_gravity  member  is  set  to  the  window's  window gravity and can be one of the
       following:

       UnmapGravity       EastGravity
       NorthWestGravity   SouthWestGravity
       NorthGravity       SouthGravity
       NorthEastGravity   SouthEastGravity
       WestGravity        StaticGravity
       CenterGravity

       For additional information on gravity, see section 3.3.

       The backing_store member is set to indicate how the X server should maintain the  contents
       of a window and can be WhenMapped, Always, or NotUseful.  The backing_planes member is set
       to indicate (with bits set to 1) which bit planes of the window  hold  dynamic  data  that
       must  be  preserved in backing_stores and during save_unders.  The backing_pixel member is
       set to indicate what values to use for planes not set in backing_planes.

       The save_under member is set to True or False.  The colormap member is set to the colormap
       for  the  specified  window and can be a colormap ID or None.  The map_installed member is
       set to indicate whether the colormap is currently installed and can be True or False.  The
       map_state  member  is  set  to  indicate  the  state  of the window and can be IsUnmapped,
       IsUnviewable, or IsViewable.  IsUnviewable is used  if  the  window  is  mapped  but  some
       ancestor is unmapped.

       The  all_event_masks member is set to the bitwise inclusive OR of all event masks selected
       on the window by all clients.  The your_event_mask member is set to the bitwise  inclusive
       OR  of  all event masks selected by the querying client.  The do_not_propagate_mask member
       is set to the bitwise inclusive OR of the set of events that should not propagate.

       The override_redirect member is set to indicate whether this  window  overrides  structure
       control  facilities  and  can  be True or False.  Window manager clients should ignore the
       window if this member is True.

       The screen member is set to a screen pointer that gives you a back pointer to the  correct
       screen.  This makes it easier to obtain the screen information without having to loop over
       the root window fields to see which field matches.

DIAGNOSTICS

       BadDrawable
                 A value for a Drawable argument does not name a defined Window or Pixmap.

       BadWindow A value for a Window argument does not name a defined Window.

SEE ALSO

       XQueryPointer(3), XQueryTree(3)
       Xlib - C Language X Interface