manpagez: man pages & more
html files: gdk2
Home | html | info | man

Input

Input — Callbacks on file descriptors

Types and Values

Includes

#include <gdk/gdk.h>

Description

The functions in this section are used to establish callbacks when some condition becomes true for a file descriptor. They are currently just wrappers around the IO Channel facility.

Functions

gdk_input_add_full ()

gint
gdk_input_add_full (gint source,
                    GdkInputCondition condition,
                    GdkInputFunction function,
                    gpointer data,
                    GDestroyNotify destroy);

gdk_input_add_full has been deprecated since version 2.14 and should not be used in newly-written code.

Use g_io_add_watch_full() on a GIOChannel

Establish a callback when a condition becomes true on a file descriptor.

Parameters

source

a file descriptor.

 

condition

the condition.

 

function

the callback function.

 

data

callback data passed to function .

 

destroy

callback function to call with data when the input handler is removed.

 

Returns

a tag that can later be used as an argument to gdk_input_remove().


GdkInputFunction ()

void
(*GdkInputFunction) (gpointer data,
                     gint source,
                     GdkInputCondition condition);

A callback function that will be called when some condition occurs.

Parameters

data

the user data passed to gdk_input_add() or gdk_input_add_full().

 

source

the source where the condition occurred.

 

condition

the triggering condition.

 

GdkDestroyNotify ()

void
(*GdkDestroyNotify) (gpointer data);

GdkDestroyNotify is deprecated and should not be used in newly-written code.

A callback function called when a piece of user data is no longer being stored by GDK. Will typically free the structure or object that data points to.

Parameters

data

the user data.

 

gdk_input_add ()

gint
gdk_input_add (gint source,
               GdkInputCondition condition,
               GdkInputFunction function,
               gpointer data);

gdk_input_add has been deprecated since version 2.14 and should not be used in newly-written code.

Use g_io_add_watch() on a GIOChannel

Establish a callback when a condition becomes true on a file descriptor.

Parameters

source

a file descriptor.

 

condition

the condition.

 

function

the callback function.

 

data

callback data passed to function .

 

Returns

a tag that can later be used as an argument to gdk_input_remove().


gdk_input_remove ()

void
gdk_input_remove (gint tag);

gdk_input_remove is deprecated and should not be used in newly-written code.

Remove a callback added with gdk_input_add() or gdk_input_add_full().

Parameters

tag

the tag returned when the callback was set up.

 

Types and Values

enum GdkInputCondition

A set of bit flags used to specify conditions for which an input callback will be triggered. The three members of this enumeration correspond to the readfds, writefds, and exceptfds arguments to the select system call.

Members

GDK_INPUT_READ

the file descriptor has become available for reading. (Or, as is standard in Unix, a socket or pipe was closed at the other end; this is the case if a subsequent read on the file descriptor returns a count of zero.)

 

GDK_INPUT_WRITE

the file descriptor has become available for writing.

 

GDK_INPUT_EXCEPTION

an exception was raised on the file descriptor.

 

See Also

GLib Main Loop

The main loop in which input callbacks run.

IO Channels

A newer and more flexible way of doing IO callbacks.

© manpagez.com 2000-2017
Individual documents may contain additional copyright information.