XAllocSizeHints man page

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_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.

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 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 PMaxSize (1L << 5) /* program specified maximum size */
#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

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), XSetCommand(3), XSetTransientForHint(3), XSetTextProperty(3), XSetWMClientMachine(3), XSetWMColormapWindows(3), XSetWMIconName(3), XSetWMName(3), XSetWMProperties(3), XSetWMProtocols(3), XStringListToTextProperty(3)
Xlib - C Language X Interface, O'Reilly and Associates,

Referenced By

XAllocClassHint(3), XAllocIconSize(3), XAllocWMHints(3), XSetCommand(3), XSetTextProperty(3), XSetTransientForHint(3), XSetWMClientMachine(3), XSetWMColormapWindows(3), XSetWMIconName(3), XSetWMName(3), XSetWMProperties(3), XSetWMProtocols(3), XStringListToTextProperty(3).

The man pages XGetWMNormalHints(3), XGetWMSizeHints(3), XSetWMNormalHints(3), XSetWMSizeHints(3) and XSizeHints(3) are aliases of XAllocSizeHints(3).

libX11 1.6.5 X Version 11 XLIB FUNCTIONS