XAllocSizeHints(3) XLIB FUNCTIONS XAllocSizeHints(3)
NAME
XAllocSizeHints, XSetWMNormalHints, XGetWMNormalHints, XSetWMSizeHints,
XGetWMSizeHints, XSizeHints - allocate size hints structure and set or
read a window's WM_NORMAL_HINTS property
SYNTAX
XSizeHints *XAllocSizeHints(void);
void XSetWMNormalHints(Display *display, Window w, XSizeHints *hints);
Status XGetWMNormalHints(Display *display, Window w, XSizeHints
*hints_return, long *supplied_return);
void XSetWMSizeHints(Display *display, Window w, XSizeHints *hints, Atom
property);
Status XGetWMSizeHints(Display *display, Window w, XSizeHints *hints_re-
turn, long *supplied_return, Atom property);
ARGUMENTS
display Specifies the connection to the X server.
hints Specifies the size hints for the window in its normal state.
hints Specifies the XSizeHints structure to be used.
hints_return
Returns the size hints for the window in its normal state.
property Specifies the property name.
supplied_return
Returns the hints that were supplied by the user.
w Specifies the window.
DESCRIPTION
The XAllocSizeHints function allocates and returns a pointer to a XSize-
Hints structure. Note that all fields in the XSizeHints structure are
initially set to zero. If insufficient memory is available, XAllocSize-
Hints returns NULL. To free the memory allocated to this structure, use
XFree.
The XSetWMNormalHints function replaces the size hints for the WM_NOR-
MAL_HINTS property on the specified window. If the property does not
already exist, XSetWMNormalHints sets the size hints for the WM_NOR-
MAL_HINTS property on the specified window. The property is stored with
a type of WM_SIZE_HINTS and a format of 32.
XSetWMNormalHints can generate BadAlloc and BadWindow errors.
The XGetWMNormalHints function returns the size hints stored in the
WM_NORMAL_HINTS property on the specified window. If the property is of
type WM_SIZE_HINTS, is of format 32, and is long enough to contain ei-
ther an old (pre-ICCCM) or new size hints structure, XGetWMNormalHints
sets the various fields of the XSizeHints structure, sets the sup-
plied_return argument to the list of fields that were supplied by the
user (whether or not they contained defined values), and returns a
nonzero status. Otherwise, it returns a zero status.
If XGetWMNormalHints returns successfully and a pre-ICCCM size hints
property is read, the supplied_return argument will contain the follow-
ing bits:
(USPosition|USSize|PPosition|PSize|PMinSize|
PMaxSize|PResizeInc|PAspect)
If the property is large enough to contain the base size and window
gravity fields as well, the supplied_return argument will also contain
the following bits:
PBaseSize|PWinGravity
XGetWMNormalHints can generate a PN BadWindow error.
The XSetWMSizeHints function replaces the size hints for the specified
property on the named window. If the specified property does not al-
ready exist, XSetWMSizeHints sets the size hints for the specified prop-
erty on the named window. The property is stored with a type of
WM_SIZE_HINTS and a format of 32. To set a window's normal size hints,
you can use the XSetWMNormalHints function.
XSetWMSizeHints can generate BadAlloc, BadAtom, and BadWindow errors.
The XGetWMSizeHints function returns the size hints stored in the speci-
fied property on the named window. If the property is of type
WM_SIZE_HINTS, is of format 32, and is long enough to contain either an
old (pre-ICCCM) or new size hints structure, XGetWMSizeHints sets the
various fields of the XSizeHints structure, sets the supplied_return ar-
gument to the list of fields that were supplied by the user (whether or
not they contained defined values), and returns a nonzero status. Oth-
erwise, it returns a zero status. To get a window's normal size hints,
you can use the XGetWMNormalHints function.
If XGetWMSizeHints returns successfully and a pre-ICCCM size hints prop-
erty is read, the supplied_return argument will contain the following
bits:
(USPosition|USSize|PPosition|PSize|PMinSize|
PMaxSize|PResizeInc|PAspect)
If the property is large enough to contain the base size and window
gravity fields as well, the supplied_return argument will also contain
the following bits:
PBaseSize|PWinGravity
XGetWMSizeHints can generate BadAtom and BadWindow errors.
PROPERTIES
WM_NORMAL_HINTS
Size hints for a window in its normal state. The C type of
this property is XSizeHints.
STRUCTURES
The XSizeHints structure contains:
/* Size hints mask bits */
#de- USPosition (1L << 0) /* user specified x, y */
fine
#de- USSize (1L << 1) /* user specified width,
fine height */
#de- PPosition (1L << 2) /* program specified posi-
fine tion */
#de- PSize (1L << 3) /* program specified size */
fine
#de- PMinSize (1L << 4) /* program specified minimum
fine size */
#de- PMaxSize (1L << 5) /* program specified maximum
fine size */
#de- PResizeInc (1L << 6) /* program specified resize
fine increments */
#de- PAspect (1L << 7) /* program specified min and
fine max aspect ratios */
#de- PBaseSize (1L << 8)
fine
#de- PWinGrav- (1L << 9)
fine ity
#de- PAllHints (PPosition|
fine PSize|
PMinSize|
PMaxSize|
PRe-
sizeInc|
PAspect)
/* Values */
typedef struct {
long flags; /* marks which fields in this structure are defined */
int x, y; /* Obsolete */
int width, height; /* Obsolete */
int min_width, min_height;
int max_width, max_height;
int width_inc, height_inc;
struct {
int x; /* numerator */
int y; /* denominator */
} min_aspect, max_aspect;
int base_width, base_height;
int win_gravity;
/* this structure may be extended in the future */
} XSizeHints;
The x, y, width, and height members are now obsolete and are left solely
for compatibility reasons. The min_width and min_height members specify
the minimum window size that still allows the application to be useful.
The max_width and max_height members specify the maximum window size.
The width_inc and height_inc members define an arithmetic progression of
sizes (minimum to maximum) into which the window prefers to be resized.
The min_aspect and max_aspect members are expressed as ratios of x and
y, and they allow an application to specify the range of aspect ratios
it prefers. The base_width and base_height members define the desired
size of the window. The window manager will interpret the position of
the window and its border width to position the point of the outer rec-
tangle of the overall window specified by the win_gravity member. The
outer rectangle of the window includes any borders or decorations sup-
plied by the window manager. In other words, if the window manager de-
cides to place the window where the client asked, the position on the
parent window's border named by the win_gravity will be placed where the
client window would have been placed in the absence of a window manager.
Note that use of the PAllHints macro is highly discouraged.
DIAGNOSTICS
BadAlloc The server failed to allocate the requested resource or server
memory.
BadAtom A value for an Atom argument does not name a defined Atom.
BadWindow A value for a Window argument does not name a defined Window.
SEE ALSO
XAllocClassHint(3), XAllocIconSize(3), XAllocWMHints(3), XFree(3), XSet-
Command(3), XSetTransientForHint(3), XSetTextProperty(3), XSetWMClient-
Machine(3), XSetWMColormapWindows(3), XSetWMIconName(3), XSetWMName(3),
XSetWMProperties(3), XSetWMProtocols(3), XStringListToTextProperty(3)
Xlib - C Language X Interface, O'Reilly and Associates,
X Version 11 libX11 1.8.12 XAllocSizeHints(3)
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