XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
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 XSetWMNormalHints(display, w, hints)
Display *display;
Window w;
XSizeHints *hints;
Status XGetWMNormalHints(display, w, hints_return,
supplied_return)
Display *display;
Window w;
XSizeHints *hints_return;
long *supplied_return;
void XSetWMSizeHints(display, w, hints, property)
Display *display;
Window w;
XSizeHints *hints;
Atom property;
Status XGetWMSizeHints(display, w, hints_return,
supplied_return, property)
Display *display;
Window w;
XSizeHints *hints_return;
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.
Page 1 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
w Specifies the window.
DESCRIPTION
The XAllocSizeHints function allocates and returns a pointer
to a XSizeHints structure. Note that all fields in the
XSizeHints structure are initially set to zero. If
insufficient memory is available, XAllocSizeHints returns
NULL. To free the memory allocated to this structure, use
XFree.
The XSetWMNormalHints function replaces the size hints for
the WM_NORMAL_HINTS property on the specified window. If
the property does not already exist, XSetWMNormalHints sets
the size hints for the WM_NORMAL_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 either an old (pre-ICCCM) or new
size hints structure, XGetWMNormalHints sets the various
fields of the XSizeHints structure, sets the supplied_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 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
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 already exist, XSetWMSizeHints sets the
size hints for the specified property 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
Page 2 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
use the XSetWMNormalHints function.
XSetWMSizeHints can generate BadAlloc, BadAtom, and
BadWindow errors.
The XGetWMSizeHints function returns the size hints stored
in the specified 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 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. To
get a window's normal size hints, you can use the
XGetWMNormalHints function.
If XGetWMSizeHints returns successfully and a pre-ICCCM size
hints property 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 */
#define
USPosition
(1L << 0)
/* user specified x, y */
#define
USSize
(1L << 1)
/* user specified width, height
*/
#define
PPosition
(1L << 2)
/* program specified position
*/
#define
PSize
(1L << 3)
/* program specified size */
#define
PMinSize
(1L << 4)
/* program specified minimum
size */
#define
Page 3 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
PMaxSize
(1L << 5)
Page 4 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
/* program specified maximum
size */
Page 5 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
#define
PResizeInc
(1L << 6)
/* program specified resize
increments */
#define
PAspect
(1L << 7)
/* program specified min and
max aspect ratios */
#define
PBaseSize
(1L << 8)
#define
PWinGravity
(1L << 9)
#define
PAllHints
(PPosition|PSize|
PMinSize|PMaxSize|
PResizeInc|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 rectangle of the overall
window specified by the win_gravity member. The outer
rectangle of the window includes any borders or decorations
supplied by the window manager. In other words, if the
window manager decides 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
Page 6 (printed 7/20/06)
XAllocSizeHints(3X11X Version 11 (Release 6.XAllocSizeHints(3X11)
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(3X11), XAllocIconSize(3X11),
XAllocWMHints(3X11), XFree(3X11), XSetCommand(3X11),
XSetTransientForHint(3X11), XSetTextProperty(3X11),
XSetWMClientMachine(3X11), XSetWMColormapWindows(3X11),
XSetWMIconName(3X11), XSetWMName(3X11),
XSetWMProperties(3X11), XSetWMProtocols(3X11),
XStringListToTextProperty(3X11)
Xlib - C Language X Interface
Page 7 (printed 7/20/06)
