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xwmhints(3x11) [ultrix man page]

XAllocWMHints(3X11)						     MIT X11R4						       XAllocWMHints(3X11)

       XAllocWMHints, XSetWMHints, XGetWMHints, XWMHints - allocate window manager hints structure and set or read a window's WM_HINTS property

       XWMHints *XAllocWMHints()

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

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

       display	 Specifies the connection to the X server.

       w	 Specifies the window.

       wmhints	 Specifies the structure to be used.

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

       The 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.

       can generate and errors.

       The 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 struc-
       ture if it succeeds.  When finished with the data, free the space used for it by calling

       can generate a error.

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

       The structure contains:

       /* 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	 AllHints	    (InputHint|StateHint|
				    dowHint| IconPosition-
				    Hint|IconMaskHint| Win-
       /* 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 manager 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 X10-style appli-
       cations that use real-estate driven focus, should set this member to 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 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 man-
       agement) should set this member to Applications that never expect any keyboard input also should set this member to

       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 Push model window managers should make sure that pull model applications do not break them by reset-
       ting input focus to when it is appropriate (for example, whenever an application whose input member is sets input focus to one of its sub-

       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 nonrectangular 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 server failed to allocate the requested resource or server memory.

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

See Also
       XAllocClassHint(3X11), XAllocIconSize(3X11), XAllocSizeHints(3X11), XFree(3X11), XSetCommand(3X11), XSetTransientForHint(3X11), XSet-
       TextProperty(3X11), XSetWMClientMachine(3X11), XSetWMColormapWindows(3X11), XSetWMIconName(3X11), XSetWMName(3X11), XSetWMProperties(3X11),
       XSetWMProtocols(3X11), XStringListToTextProperty(3X11)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

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