XAllocWMHints man page on BSDi

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XAllocWMHints(3X11)	XLIB FUNCTIONS	    XAllocWMHints(3X11)

NAME
       XAllocWMHints, XSetWMHints, XGetWMHints, XWMHints - allo-
       cate window manager hints structure and set or read a win-
       dow's WM_HINTS property

SYNTAX
       XWMHints *XAllocWMHints()

       XSetWMHints(display, w, wmhints)
	     Display *display;
	     Window w;
	     XWMHints *wmhints;

       XWMHints *XGetWMHints(display, w)
	     Display *display;
	     Window w;

ARGUMENTS
       display	Specifies the connection to the X server.

       w	 Specifies the window.

       wmhints	Specifies the XWMHints structure to be used.

DESCRIPTION
       The XAllocWMHints function allocates and returns a pointer
       to a XWMHints structure. Note that all fields in the
       XWMHints structure are initially set to zero.  If insuffi-
       cient memory is available, XAllocWMHints returns NULL.  To
       free the memory allocated to this structure, use XFree.

       The XSetWMHints function sets the window manager hints
       that include icon information and location, the initial
       state of the window, and whether the application relies on
       the window manager to get keyboard input.

       XSetWMHints can generate BadAlloc and BadWindow errors.

       The XGetWMHints function reads the window manager hints
       and returns NULL if no WM_HINTS property was set on the
       window or returns a pointer to a XWMHints structure if it
       succeeds.  When finished with the data, free the space
       used for it by calling XFree.

       XGetWMHints can generate a BadWindow error.

PROPERTIES
       WM_HINTS Additional hints set by the client for use by
		 the window manager.  The C type of this property
		 is XWMHints.

STRUCTURES
       The XWMHints structure contains:

X Version 11		Release 6.4				1

XAllocWMHints(3X11)	XLIB FUNCTIONS	    XAllocWMHints(3X11)

       /* Window manager hints mask bits */
       #define	InputHint		   (1L << 0)
       #define	StateHint		   (1L << 1)
       #define	IconPixmapHint		(1L << 2)
       #define	IconWindowHint		(1L << 3)
       #define	IconPositionHint	    (1L << 4)
       #define	IconMaskHint		(1L << 5)
       #define	WindowGroupHint	     (1L << 6)
       #define	UrgencyHint		 (1L << 8)
       #define	AllHints		    (InputHint|State-
					     Hint|IconPixmapHint|
					     IconWindowHint|IconPosi-
					     tionHint|
					     IconMaskHint|Window-
					     GroupHint)
       /* Values */

       typedef struct {
	    long flags;		/* marks which fields in this structure are defined */
	    Bool input;		/* does this application rely on the window manager to
				get keyboard input? */
	    int initial_state;	/* see below */
	    Pixmap icon_pixmap; /* pixmap to be used as icon */
	    Window icon_window; /* window to be used as icon */
	    int icon_x, icon_y; /* initial position of icon */
	    Pixmap icon_mask;	/* pixmap to be used as mask for icon_pixmap */
	    XID window_group;	/* id of related window group */
	    /* this structure may be extended in the future */
       } XWMHints;

       The input member is used to communicate to the window man-
       ager the input focus model used by the application.
       Applications that expect input but never explicitly set
       focus to any of their subwindows (that is, use the push
       model of focus management), such as X Version 10 style
       applications that use real-estate driven focus, should set
       this member to True.  Similarly, applications that set
       input focus to their subwindows only when it is given to
       their top-level window by a window manager should also set
       this member to True.  Applications that manage their own
       input focus by explicitly setting focus to one of their
       subwindows whenever they want keyboard input (that is, use
       the pull model of focus management) should set this member
       to False.  Applications that never expect any keyboard
       input also should set this member to False.

       Pull model window managers should make it possible for
       push model applications to get input by setting input
       focus to the top-level windows of applications whose input
       member is True.	Push model window managers should make
       sure that pull model applications do not break them by
       resetting input focus to PointerRoot when it is appropri-
       ate (for example, whenever an application whose input mem-
       ber is False sets input focus to one of its subwindows).

X Version 11		Release 6.4				2

XAllocWMHints(3X11)	XLIB FUNCTIONS	    XAllocWMHints(3X11)

       The definitions for the initial_state flag are:
       #define	WithdrawnState		0
       #define	NormalState		1    /* most applications start
					     this way */
       #define	IconicState		3    /* application wants to
					     start as an icon */
       The icon_mask specifies which pixels of the icon_pixmap
       should be used as the icon.  This allows for nonrectangu-
       lar icons.  Both icon_pixmap and icon_mask must be
       bitmaps. The icon_window lets an application provide a
       window for use as an icon for window managers that support
       such use.  The window_group lets you specify that this
       window belongs to a group of other windows.  For example,
       if a single application manipulates multiple top-level
       windows, this allows you to provide enough information
       that a window manager can iconify all of the windows
       rather than just the one window.

       The UrgencyHint flag, if set in the flags field, indicates
       that the client deems the window contents to be urgent,
       requiring the timely response of the user.  The window
       manager will make some effort to draw the user's attention
       to this window while this flag is set.  The client must
       provide some means by which the user can cause the urgency
       flag to be cleared (either mitigating the condition that
       made the window urgent or merely shutting off the alarm)
       or the window to be withdrawn.

DIAGNOSTICS
       BadAlloc The server failed to allocate the requested
		 resource or server memory.

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

SEE ALSO
       XAllocClassHint(3X11), XAllocIconSize(3X11), XAllocSize-
       Hints(3X11), XFree(3X11), XSetCommand(3X11), XSetTran-
       sientForHint(3X11), XSetTextProperty(3X11), XSetWMClient-
       Machine(3X11), XSetWMColormapWindows(3X11), XSetWMIcon-
       Name(3X11), XSetWMName(3X11), XSetWMProperties(3X11),
       XSetWMProtocols(3X11), XStringListToTextProperty(3X11)
       Xlib - C Language X Interface

X Version 11		Release 6.4				3

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