Sets our main struct and passes it to the parent class.
Creates a #GFile corresponding to a filename that was given as part of the invocation of @cmdline.
Get the main Gtk struct
Gets the list of arguments that was passed on the command line.
Gets the working directory of the command line invocation. The string may contain non-utf8 data.
Gets the contents of the 'environ' variable of the command line invocation, as would be returned by g_get_environ(), ie as a %NULL-terminated list of strings in the form 'NAME=VALUE'. The strings may contain non-utf8 data.
Gets the exit status of @cmdline. See g_application_command_line_set_exit_status() for more information.
Determines if @cmdline represents a remote invocation.
Gets the options there were passed to g_application_command_line().
Gets the platform data associated with the invocation of @cmdline.
Gets the stdin of the invoking process.
the main Gtk struct as a void*
Gets the value of a particular environment variable of the command line invocation, as would be returned by g_getenv(). The strings may contain non-utf8 data.
Sets the exit status that will be used when the invoking process exits.
the main Gtk struct
the main Gtk struct
Get the main Gtk struct
the main Gtk struct as a void*
Gets a D Object from the objects table of associations.
The notify signal is emitted on an object when one of its properties has been changed. Note that getting this signal doesn't guarantee that the value of the property has actually changed, it may also be emitted when the setter for the property is called to reinstate the previous value.
Find the #GParamSpec with the given name for an interface. Generally, the interface vtable passed in as @g_iface will be the default vtable from g_type_default_interface_ref(), or, if you know the interface has already been loaded, g_type_default_interface_peek().
Add a property to an interface; this is only useful for interfaces that are added to GObject-derived types. Adding a property to an interface forces all objects classes with that interface to have a compatible property. The compatible property could be a newly created #GParamSpec, but normally g_object_class_override_property() will be used so that the object class only needs to provide an implementation and inherits the property description, default value, bounds, and so forth from the interface property.
Lists the properties of an interface.Generally, the interface vtable passed in as @g_iface will be the default vtable from g_type_default_interface_ref(), or, if you know the interface has already been loaded, g_type_default_interface_peek().
Increases the reference count of the object by one and sets a callback to be called when all other references to the object are dropped, or when this is already the last reference to the object and another reference is established.
Adds a weak reference from weak_pointer to @object to indicate that the pointer located at @weak_pointer_location is only valid during the lifetime of @object. When the @object is finalized, @weak_pointer will be set to %NULL.
Creates a binding between @source_property on @source and @target_property on @target. Whenever the @source_property is changed the @target_property is updated using the same value. For instance:
Complete version of g_object_bind_property().
Creates a binding between @source_property on @source and @target_property on @target, allowing you to set the transformation functions to be used by the binding.
This is a variant of g_object_get_data() which returns a 'duplicate' of the value. @dup_func defines the meaning of 'duplicate' in this context, it could e.g. take a reference on a ref-counted object.
This is a variant of g_object_get_qdata() which returns a 'duplicate' of the value. @dup_func defines the meaning of 'duplicate' in this context, it could e.g. take a reference on a ref-counted object.
This function is intended for #GObject implementations to re-enforce a floating[floating-ref] object reference. Doing this is seldom required: all #GInitiallyUnowneds are created with a floating reference which usually just needs to be sunken by calling g_object_ref_sink().
Increases the freeze count on @object. If the freeze count is non-zero, the emission of "notify" signals on @object is stopped. The signals are queued until the freeze count is decreased to zero. Duplicate notifications are squashed so that at most one #GObject::notify signal is emitted for each property modified while the object is frozen.
Gets a named field from the objects table of associations (see g_object_set_data()).
Gets a property of an object. @value must have been initialized to the expected type of the property (or a type to which the expected type can be transformed) using g_value_init().
This function gets back user data pointers stored via g_object_set_qdata().
Gets properties of an object.
Gets @n_properties properties for an @object. Obtained properties will be set to @values. All properties must be valid. Warnings will be emitted and undefined behaviour may result if invalid properties are passed in.
Checks whether @object has a floating[floating-ref] reference.
Emits a "notify" signal for the property @property_name on @object.
Emits a "notify" signal for the property specified by @pspec on @object.
Increases the reference count of @object.
Increase the reference count of @object, and possibly remove the floating[floating-ref] reference, if @object has a floating reference.
Removes a reference added with g_object_add_toggle_ref(). The reference count of the object is decreased by one.
Removes a weak reference from @object that was previously added using g_object_add_weak_pointer(). The @weak_pointer_location has to match the one used with g_object_add_weak_pointer().
Compares the user data for the key @key on @object with @oldval, and if they are the same, replaces @oldval with @newval.
Compares the user data for the key @quark on @object with @oldval, and if they are the same, replaces @oldval with @newval.
Releases all references to other objects. This can be used to break reference cycles.
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
Like g_object_set_data() except it adds notification for when the association is destroyed, either by setting it to a different value or when the object is destroyed.
Sets a property on an object.
This sets an opaque, named pointer on an object. The name is specified through a #GQuark (retrived e.g. via g_quark_from_static_string()), and the pointer can be gotten back from the @object with g_object_get_qdata() until the @object is finalized. Setting a previously set user data pointer, overrides (frees) the old pointer set, using #NULL as pointer essentially removes the data stored.
This function works like g_object_set_qdata(), but in addition, a void (*destroy) (gpointer) function may be specified which is called with @data as argument when the @object is finalized, or the data is being overwritten by a call to g_object_set_qdata() with the same @quark.
Sets properties on an object.
Sets @n_properties properties for an @object. Properties to be set will be taken from @values. All properties must be valid. Warnings will be emitted and undefined behaviour may result if invalid properties are passed in.
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
This function gets back user data pointers stored via g_object_set_qdata() and removes the @data from object without invoking its destroy() function (if any was set). Usually, calling this function is only required to update user data pointers with a destroy notifier, for example: |[<!-- language="C" --> void object_add_to_user_list (GObject *object, const gchar *new_string) { // the quark, naming the object data GQuark quark_string_list = g_quark_from_static_string ("my-string-list"); // retrive the old string list GList *list = g_object_steal_qdata (object, quark_string_list);
Reverts the effect of a previous call to g_object_freeze_notify(). The freeze count is decreased on @object and when it reaches zero, queued "notify" signals are emitted.
Decreases the reference count of @object. When its reference count drops to 0, the object is finalized (i.e. its memory is freed).
This function essentially limits the life time of the @closure to the life time of the object. That is, when the object is finalized, the @closure is invalidated by calling g_closure_invalidate() on it, in order to prevent invocations of the closure with a finalized (nonexisting) object. Also, g_object_ref() and g_object_unref() are added as marshal guards to the @closure, to ensure that an extra reference count is held on @object during invocation of the @closure. Usually, this function will be called on closures that use this @object as closure data.
Adds a weak reference callback to an object. Weak references are used for notification when an object is finalized. They are called "weak references" because they allow you to safely hold a pointer to an object without calling g_object_ref() (g_object_ref() adds a strong reference, that is, forces the object to stay alive).
Removes a weak reference callback to an object.
Clears a reference to a #GObject.
#GApplicationCommandLine represents a command-line invocation of an application. It is created by #GApplication and emitted in the #GApplication::command-line signal and virtual function.
The class contains the list of arguments that the program was invoked with. It is also possible to query if the commandline invocation was local (ie: the current process is running in direct response to the invocation) or remote (ie: some other process forwarded the commandline to this process).
The GApplicationCommandLine object can provide the @argc and @argv parameters for use with the #GOptionContext command-line parsing API, with the g_application_command_line_get_arguments() function. See [gapplication-example-cmdline3.c][gapplication-example-cmdline3] for an example.
The exit status of the originally-invoked process may be set and messages can be printed to stdout or stderr of that process. The lifecycle of the originally-invoked process is tied to the lifecycle of this object (ie: the process exits when the last reference is dropped).
The main use for #GApplicationCommandLine (and the #GApplication::command-line signal) is 'Emacs server' like use cases: You can set the EDITOR environment variable to have e.g. git use your favourite editor to edit commit messages, and if you already have an instance of the editor running, the editing will happen in the running instance, instead of opening a new one. An important aspect of this use case is that the process that gets started by git does not return until the editing is done.
Normally, the commandline is completely handled in the #GApplication::command-line handler. The launching instance exits once the signal handler in the primary instance has returned, and the return value of the signal handler becomes the exit status of the launching instance. |[<!-- language="C" --> static int command_line (GApplication *application, GApplicationCommandLine *cmdline) { gchar **argv; gint argc; gint i;
argv = g_application_command_line_get_arguments (cmdline, &argc);
g_application_command_line_print (cmdline, "This text is written back\n" "to stdout of the caller\n");
for (i = 0; i < argc; i++) g_print ("argument %d: %s\n", i, argvi);
g_strfreev (argv);
return 0; } ]| The complete example can be found here: gapplication-example-cmdline.c
In more complicated cases, the handling of the comandline can be split between the launcher and the primary instance. |[<!-- language="C" --> static gboolean test_local_cmdline (GApplication *application, gchar ***arguments, gint *exit_status) { gint i, j; gchar **argv;
argv = *arguments;
i = 1; while (argvi) { if (g_str_has_prefix (argvi, "--local-")) { g_print ("handling argument %s locally\n", argvi); g_free (argvi); for (j = i; argvj; j++) argvj = argv[j + 1]; } else { g_print ("not handling argument %s locally\n", argvi); i++; } }
*exit_status = 0;
return FALSE; }
static void test_application_class_init (TestApplicationClass *class) { G_APPLICATION_CLASS (class)->local_command_line = test_local_cmdline;
... } ]| In this example of split commandline handling, options that start with --local- are handled locally, all other options are passed to the #GApplication::command-line handler which runs in the primary instance.
The complete example can be found here: gapplication-example-cmdline2.c
If handling the commandline requires a lot of work, it may be better to defer it. |[<!-- language="C" --> static gboolean my_cmdline_handler (gpointer data) { GApplicationCommandLine *cmdline = data;
// do the heavy lifting in an idle
g_application_command_line_set_exit_status (cmdline, 0); g_object_unref (cmdline); // this releases the application
return G_SOURCE_REMOVE; }
static int command_line (GApplication *application, GApplicationCommandLine *cmdline) { // keep the application running until we are done with this commandline g_application_hold (application);
g_object_set_data_full (G_OBJECT (cmdline), "application", application, (GDestroyNotify)g_application_release);
g_object_ref (cmdline); g_idle_add (my_cmdline_handler, cmdline);
return 0; } ]| In this example the commandline is not completely handled before the #GApplication::command-line handler returns. Instead, we keep a reference to the #GApplicationCommandLine object and handle it later (in this example, in an idle). Note that it is necessary to hold the application until you are done with the commandline.
The complete example can be found here: gapplication-example-cmdline3.c