Tribblix: manual page: XAllocIconSize.3

XAllocIconSize(3) XLIB FUNCTIONS XAllocIconSize(3)

NAME

XAllocIconSize, XSetIconSizes, XGetIconSizes, XIconSize - allocate
icon size structure and set or read a window's WM_ICON_SIZES property

SYNTAX

XIconSize *XAllocIconSize(void);

int XSetIconSizes(Display *display, Window w, XIconSize *size_list,
int count);

Status XGetIconSizes(Display *display, Window w, XIconSize
**size_list_return, int *count_return);

ARGUMENTS

display Specifies the connection to the X server.

count Specifies the number of items in the size list.

count_return
Returns the number of items in the size list.

size_list Specifies the size list.

size_list_return
Returns the size list.

w Specifies the window.

DESCRIPTION

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

The XSetIconSizes function is used only by window managers to set the
supported icon sizes.

XSetIconSizes can generate BadAlloc and BadWindow errors.

The XGetIconSizes function returns zero if a window manager has not
set icon sizes; otherwise, it return nonzero. XGetIconSizes should
be called by an application that wants to find out what icon sizes
would be most appreciated by the window manager under which the
application is running. The application should then use XSetWMHints
to supply the window manager with an icon pixmap or window in one of
the supported sizes. To free the data allocated in size_list_return,
use XFree.

XGetIconSizes can generate a BadWindow error.

PROPERTIES

WM_ICON_SIZES
The window manager may set this property on the root window
to specify the icon sizes it supports. The C type of this
property is XIconSize.

STRUCTURES

The XIconSize structure contains:

typedef struct {
int min_width, min_height;
int max_width, max_height;
int width_inc, height_inc;
} XIconSize;

The width_inc and height_inc members define an arithmetic progression
of sizes (minimum to maximum) that represent the supported icon
sizes.

DIAGNOSTICS

BadAlloc The server failed to allocate the requested resource or
server memory.

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