The "add-tearoffs" property controls whether generated menus have tearoff menu items.
Note that this only affects regular menus. Generated popup menus never have tearoff menu items.
Adds a UI element to the current contents of manager.
If type is %GTK_UI_MANAGER_AUTO, GTK+ inserts a menuitem, toolitem or
separator if such an element can be inserted at the place determined by
path. Otherwise type must indicate an element that can be inserted at
the place determined by path.
If path points to a menuitem or toolitem, the new element will be inserted
before or after this item, depending on top.
the merge id for the merged UI, see gtk_ui_manager_new_merge_id()
a path
the name for the added UI element
the name of the action to be proxied, or %NULL to add a separator
the type of UI element to add.
if %TRUE, the UI element is added before its siblings, otherwise it is added after its siblings.
Parses a file containing a [UI definition][XML-UI] and
merges it with the current contents of manager.
the name of the file to parse
Parses a resource file containing a [UI definition][XML-UI] and
merges it with the current contents of manager.
the resource path of the file to parse
Parses a string containing a [UI definition][XML-UI] and merges it with
the current contents of manager. An enclosing <ui> element is added if
it is missing.
the string to parse
the length of buffer (may be -1 if buffer is nul-terminated)
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:
g_object_bind_property (action, "active", widget, "sensitive", 0);
Will result in the "sensitive" property of the widget #GObject instance to be updated with the same value of the "active" property of the action #GObject instance.
If flags contains %G_BINDING_BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well.
The binding will automatically be removed when either the source or the
target instances are finalized. To remove the binding without affecting the
source and the target you can just call g_object_unref() on the returned
#GBinding instance.
Removing the binding by calling g_object_unref() on it must only be done if
the binding, source and target are only used from a single thread and it
is clear that both source and target outlive the binding. Especially it
is not safe to rely on this if the binding, source or target can be
finalized from different threads. Keep another reference to the binding and
use g_binding_unbind() instead to be on the safe side.
A #GObject can have multiple bindings.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
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 function is the language bindings friendly version of g_object_bind_property_full(), using #GClosures instead of function pointers.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
a #GClosure wrapping the transformation function from the source to the target, or %NULL to use the default
a #GClosure wrapping the transformation function from the target to the source, or %NULL to use the default
This is similar to gtk_buildable_parser_finished() but is
called once for each custom tag handled by the buildable.
a #GtkBuilder
child object or %NULL for non-child tags
the name of the tag
user data created in custom_tag_start
This is called at the end of each custom element handled by the buildable.
#GtkBuilder used to construct this object
child object or %NULL for non-child tags
name of tag
user data that will be passed in to parser functions
This is called for each unknown element under <child>.
a #GtkBuilder used to construct this object
child object or %NULL for non-child tags
name of tag
Makes sure that all pending updates to the UI have been completed.
This may occasionally be necessary, since #GtkUIManager updates the UI in an idle function. A typical example where this function is useful is to enforce that the menubar and toolbar have been added to the main window before showing it:
gtk_container_add (GTK_CONTAINER (window), vbox);
g_signal_connect (merge, "add-widget",
G_CALLBACK (add_widget), vbox);
gtk_ui_manager_add_ui_from_file (merge, "my-menus");
gtk_ui_manager_add_ui_from_file (merge, "my-toolbars");
gtk_ui_manager_ensure_update (merge);
gtk_widget_show (window);
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.
This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.
Returns the #GtkAccelGroup associated with manager.
Returns the list of action groups associated with manager.
Returns whether menus generated by this #GtkUIManager will have tearoff menu items.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
Gets the name of the buildable object.
#GtkBuilder sets the name based on the
[GtkBuilder UI definition][BUILDER-UI]
used to construct the buildable.
Gets a property of an object.
The value can be:
In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling g_value_unset().
Note that g_object_get_property() is really intended for language bindings, g_object_get() is much more convenient for C programming.
the name of the property to get
return location for the property value
This function gets back user data pointers stored via g_object_set_qdata().
A #GQuark, naming the user data pointer
Obtains a list of all toplevel widgets of the requested types.
specifies the types of toplevel widgets to include. Allowed types are #GTK_UI_MANAGER_MENUBAR, #GTK_UI_MANAGER_TOOLBAR and #GTK_UI_MANAGER_POPUP.
Creates a [UI definition][XML-UI] of the merged UI.
Looks up a widget by following a path.
The path consists of the names specified in the XML description of the UI.
separated by “/”. Elements which don’t have a name or action attribute in
the XML (e.g. <popup>) can be addressed by their XML element name
(e.g. "popup"). The root element ("/ui") can be omitted in the path.
Note that the widget found by following a path that ends in a <menu>;
element is the menuitem to which the menu is attached, not the menu it
manages.
Also note that the widgets constructed by a ui manager are not tied to the lifecycle of the ui manager. If you add the widgets returned by this function to some container or explicitly ref them, they will survive the destruction of the ui manager.
a path
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.
the names of each property to get
the values of each property to get
Inserts an action group into the list of action groups associated
with manager. Actions in earlier groups hide actions with the same
name in later groups.
If pos is larger than the number of action groups in manager, or
negative, action_group will be inserted at the end of the internal
list.
the action group to be inserted
the position at which the group will be inserted.
Checks whether object has a [floating][floating-ref] reference.
Returns an unused merge id, suitable for use with gtk_ui_manager_add_ui().
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.
Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.
the name of a property installed on the class of object.
Emits a "notify" signal for the property specified by pspec on object.
This function omits the property name lookup, hence it is faster than g_object_notify().
One way to avoid using g_object_notify() from within the class that registered the properties, and using g_object_notify_by_pspec() instead, is to store the GParamSpec used with g_object_class_install_property() inside a static array, e.g.:
enum
{
PROP_0,
PROP_FOO,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo",
0, 100,
50,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_FOO,
properties[PROP_FOO]);
}
and then notify a change on the "foo" property with:
g_object_notify_by_pspec (self, properties[PROP_FOO]);
the #GParamSpec of a property installed on the class of object.
Increase the reference count of object, and possibly remove the
[floating][floating-ref] reference, if object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.
Since GLib 2.56, the type of object will be propagated to the return type
under the same conditions as for g_object_ref().
Removes an action group from the list of action groups associated
with manager.
the action group to be removed
Unmerges the part of manager's content identified by merge_id.
a merge id as returned by gtk_ui_manager_add_ui_from_string()
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Sets the “add_tearoffs” property, which controls whether menus generated by this #GtkUIManager will have tearoff menu items.
Note that this only affects regular menus. Generated popup menus never have tearoff menu items.
whether tearoff menu items are added
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
If the object already had an association with that name, the old association will be destroyed.
Internally, the key is converted to a #GQuark using g_quark_from_string().
This means a copy of key is kept permanently (even after object has been
finalized) — so it is recommended to only use a small, bounded set of values
for key in your program, to avoid the #GQuark storage growing unbounded.
name of the key
data to associate with that key
Sets the name of the buildable object.
name to set
Sets a property on an object.
the name of the property to set
the value
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
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:
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");
// retrieve the old string list
GList *list = g_object_steal_qdata (object, quark_string_list);
// prepend new string
list = g_list_prepend (list, g_strdup (new_string));
// this changed 'list', so we need to set it again
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
Using g_object_get_qdata() in the above example, instead of g_object_steal_qdata() would have left the destroy function set, and thus the partial string list would have been freed upon g_object_set_qdata_full().
A #GQuark, naming the user data pointer
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.
Duplicate notifications for each property are squashed so that at most one #GObject::notify signal is emitted for each property, in the reverse order in which they have been queued.
It is an error to call this function when the freeze count is zero.
Decreases the reference count of object. When its reference count
drops to 0, the object is finalized (i.e. its memory is freed).
If the pointer to the #GObject may be reused in future (for example, if it is an instance variable of another object), it is recommended to clear the pointer to %NULL rather than retain a dangling pointer to a potentially invalid #GObject instance. Use g_clear_object() for this.
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.
#GClosure to watch
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().
any interface vtable for the interface, or the default vtable for the interface
name of a property to look up.
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.
This function is meant to be called from the interface's default
vtable initialization function (the class_init member of
#GTypeInfo.) It must not be called after after class_init has
been called for any object types implementing this interface.
If pspec is a floating reference, it will be consumed.
any interface vtable for the interface, or the default vtable for the interface.
the #GParamSpec for the new 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().
any interface vtable for the interface, or the default vtable for the interface
Creates a new instance of a #GObject subtype and sets its properties.
Construction parameters (see %G_PARAM_CONSTRUCT, %G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.
the type id of the #GObject subtype to instantiate
an array of #GParameter
A #GtkUIManager constructs a user interface (menus and toolbars) from one or more UI definitions, which reference actions from one or more action groups.
UI Definitions # {#XML-UI}
The UI definitions are specified in an XML format which can be roughly described by the following DTD.
|[
The constructed widget hierarchy is very similar to the element tree of the XML, with the exception that placeholders are merged into their parents. The correspondence of XML elements to widgets should be almost obvious:
menubar
a #GtkMenuBar
toolbar
a #GtkToolbar
popup
a toplevel #GtkMenu
menu
a #GtkMenu attached to a menuitem
menuitem
a #GtkMenuItem subclass, the exact type depends on the action
toolitem
a #GtkToolItem subclass, the exact type depends on the action. Note that toolitem elements may contain a menu element, but only if their associated action specifies a #GtkMenuToolButton as proxy.
separator
a #GtkSeparatorMenuItem or #GtkSeparatorToolItem
accelerator
a keyboard accelerator
The “position” attribute determines where a constructed widget is positioned wrt. to its siblings in the partially constructed tree. If it is “top”, the widget is prepended, otherwise it is appended.
UI Merging # {#UI-Merging}
The most remarkable feature of #GtkUIManager is that it can overlay a set of menuitems and toolitems over another one, and demerge them later.
Merging is done based on the names of the XML elements. Each element is identified by a path which consists of the names of its anchestors, separated by slashes. For example, the menuitem named “Left” in the example above has the path
/ui/menubar/JustifyMenu/Leftand the toolitem with the same name has path/ui/toolbar1/JustifyToolItems/Left.Accelerators
Every action has an accelerator path. Accelerators are installed together with menuitem proxies, but they can also be explicitly added with
<accelerator>elements in the UI definition. This makes it possible to have accelerators for actions even if they have no visible proxies.Smart Separators # {#Smart-Separators}
The separators created by #GtkUIManager are “smart”, i.e. they do not show up in the UI unless they end up between two visible menu or tool items. Separators which are located at the very beginning or end of the menu or toolbar containing them, or multiple separators next to each other, are hidden. This is a useful feature, since the merging of UI elements from multiple sources can make it hard or impossible to determine in advance whether a separator will end up in such an unfortunate position.
For separators in toolbars, you can set
expand="true"to turn them from a small, visible separator to an expanding, invisible one. Toolitems following an expanding separator are effectively right-aligned.Empty Menus
Submenus pose similar problems to separators inconnection with merging. It is impossible to know in advance whether they will end up empty after merging. #GtkUIManager offers two ways to treat empty submenus:
make them disappear by hiding the menu item they’re attached to
add an insensitive “Empty” item
The behaviour is chosen based on the “hide_if_empty” property of the action to which the submenu is associated.
GtkUIManager as GtkBuildable # {#GtkUIManager-BUILDER-UI}
The GtkUIManager implementation of the GtkBuildable interface accepts GtkActionGroup objects as
<child>elements in UI definitions.A GtkUIManager UI definition as described above can be embedded in an GtkUIManager
<object>element in a GtkBuilder UI definition.The widgets that are constructed by a GtkUIManager can be embedded in other parts of the constructed user interface with the help of the “constructor” attribute. See the example below.
An embedded GtkUIManager UI definition
|[