1XAllocWMHints(3) XLIB FUNCTIONS XAllocWMHints(3)
2
6 XAllocWMHints, XSetWMHints, XGetWMHints, XWMHints - allocate window
7 manager hints structure and set or read a window's WM_HINTS property
8
10 XWMHints *XAllocWMHints(void);
11 int XSetWMHints(Display *display, Window w, XWMHints *wmhints);
13 XWMHints *XGetWMHints(Display *display, Window w);
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17 display Specifies the connection to the X server.
18 w Specifies the window.
20 wmhints Specifies the XWMHints structure to be used.
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24 The XAllocWMHints function allocates and returns a pointer to a
25 XWMHints structure. Note that all fields in the XWMHints structure are
26 initially set to zero. If insufficient memory is available, XAl‐
27 locWMHints returns NULL. To free the memory allocated to this struc‐
28 ture, use XFree.
29 The XSetWMHints function sets the window manager hints that include
31 icon information and location, the initial state of the window, and
32 whether the application relies on the window manager to get keyboard
33 input.
34 XSetWMHints can generate BadAlloc and BadWindow errors.
36 The XGetWMHints function reads the window manager hints and returns
38 NULL if no WM_HINTS property was set on the window or returns a pointer
39 to a XWMHints structure if it succeeds. When finished with the data,
40 free the space used for it by calling XFree.
41 XGetWMHints can generate a BadWindow error.
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45 WM_HINTS Additional hints set by the client for use by the window man‐
46 ager. The C type of this property is XWMHints.
47
49 The XWMHints structure contains:
50 /* Window manager hints mask bits */
52 #de‐ InputHint (1L << 0)
54 fine
55 #de‐ StateHint (1L << 1)
56 fine
57 #de‐ IconPixmapHint (1L << 2)
58 fine
59 #de‐ IconWindowHint (1L << 3)
60 fine
61 #de‐ IconPositionHint (1L << 4)
62 fine
63 #de‐ IconMaskHint (1L << 5)
64 fine
65 #de‐ WindowGroupHint (1L << 6)
68 fine
69 #de‐ XUrgencyHint (1L << 8)
70 fine
71 #de‐ AllHints (InputHint|
72 fine StateHint|
73 IconPixmapHint|
74 IconWindowHint|
75 IconPositionHint|
76 IconMaskHint|
77 WindowGroupHint)
78 /* Values */
79 typedef struct {
81 long flags; /* marks which fields in this structure are defined */
82 Bool input; /* does this application rely on the window manager to
83 get keyboard input? */
84 int initial_state; /* see below */
85 Pixmap icon_pixmap; /* pixmap to be used as icon */
86 Window icon_window; /* window to be used as icon */
87 int icon_x, icon_y; /* initial position of icon */
88 Pixmap icon_mask; /* pixmap to be used as mask for icon_pixmap */
89 XID window_group; /* id of related window group */
90 /* this structure may be extended in the future */
91 } XWMHints;
92 The input member is used to communicate to the window manager the input
94 focus model used by the application. Applications that expect input
95 but never explicitly set focus to any of their subwindows (that is, use
96 the push model of focus management), such as X Version 10 style appli‐
97 cations that use real-estate driven focus, should set this member to
98 True. Similarly, applications that set input focus to their subwindows
99 only when it is given to their top-level window by a window manager
100 should also set this member to True. Applications that manage their
101 own input focus by explicitly setting focus to one of their subwindows
102 whenever they want keyboard input (that is, use the pull model of focus
103 management) should set this member to False. Applications that never
104 expect any keyboard input also should set this member to False.
105 Pull model window managers should make it possible for push model ap‐
107 plications to get input by setting input focus to the top-level windows
108 of applications whose input member is True. Push model window managers
109 should make sure that pull model applications do not break them by re‐
110 setting input focus to PointerRoot when it is appropriate (for example,
111 whenever an application whose input member is False sets input focus to
112 one of its subwindows).
113 The definitions for the initial_state flag are:
115 #de‐ WithdrawnState 0
117 fine
118 #de‐ NormalState 1 /* most applications start this way */
119 fine
120 #de‐ IconicState 3 /* application wants to start as an
121 fine icon */
122 The icon_mask specifies which pixels of the icon_pixmap should be used
123 as the icon. This allows for nonrectangular icons. Both icon_pixmap
124 and icon_mask must be bitmaps. The icon_window lets an application
125 provide a window for use as an icon for window managers that support
126 such use. The window_group lets you specify that this window belongs
127 to a group of other windows. For example, if a single application ma‐
128 nipulates multiple top-level windows, this allows you to provide enough
129 information that a window manager can iconify all of the windows rather
130 than just the one window.
131 The UrgencyHint flag, if set in the flags field, indicates that the
133 client deems the window contents to be urgent, requiring the timely re‐
134 sponse of the user. The window manager will make some effort to draw
135 the user's attention to this window while this flag is set. The client
136 must provide some means by which the user can cause the urgency flag to
137 be cleared (either mitigating the condition that made the window urgent
138 or merely shutting off the alarm) or the window to be withdrawn.
139
141 BadAlloc The server failed to allocate the requested resource or
142 server memory.
143 BadWindow A value for a Window argument does not name a defined Window.
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147 XAllocClassHint(3), XAllocIconSize(3), XAllocSizeHints(3), XFree(3),
148 XSetCommand(3), XSetTransientForHint(3), XSetTextProperty(3), XSetWM‐
149 ClientMachine(3), XSetWMColormapWindows(3), XSetWMIconName(3), XSetWM‐
150 Name(3), XSetWMProperties(3), XSetWMProtocols(3), XStringListTo‐
151 TextProperty(3)
152 Xlib - C Language X Interface, O'Reilly and Associates, Sebastopol,
153 1991.
154X Version 11 libX11 1.7.2 XAllocWMHints(3)