diff options
author | Daniel Boles <dboles@src.gnome.org> | 2021-01-11 15:16:38 +0100 |
---|---|---|
committer | Kjell Ahlstedt <kjellahlstedt@gmail.com> | 2021-01-11 15:16:38 +0100 |
commit | 5dd0004b6c6e35bfce9422f84622ceca949933b1 (patch) | |
tree | 6724f5b9e79a6a8ca2278b15c33966abb0e25c5c | |
parent | c03a7e5aff27f495ffc61daea9171520f6c65cc6 (diff) | |
download | glibmm-5dd0004b6c6e35bfce9422f84622ceca949933b1.tar.gz |
Glib::Binding: Clarify need to hold ref, poss empty objs
and move the documentation on lifetime away from bind_property_value()
up to the class description/intro.
https://gitlab.gnome.org/GNOME/glibmm/issues/62
-rw-r--r-- | glib/src/binding.hg | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/glib/src/binding.hg b/glib/src/binding.hg index 80f8f3f1..4ad909d8 100644 --- a/glib/src/binding.hg +++ b/glib/src/binding.hg @@ -28,7 +28,7 @@ _WRAP_ENUM(BindingFlags, GBindingFlags, newin "2,44", decl_prefix GLIBMM_API) /** Bind two object properties. * - * Glib::Binding is the representation of a binding between a property on a + * %Glib::Binding is the representation of a binding between a property on a * Glib::ObjectBase instance (or source) and another property on another Glib::ObjectBase * instance (or target). Whenever the source property changes, the same * value is applied to the target property; for instance, the following binding: @@ -74,7 +74,7 @@ _WRAP_ENUM(BindingFlags, GBindingFlags, newin "2,44", decl_prefix GLIBMM_API) * current value of the property before applying it to property_value() * of @a adjustment1. * - * Note that Glib::Binding does not resolve cycles by itself; a cycle like + * Note that %Glib::Binding does not resolve cycles by itself; a cycle like * * @code * object1->property_A() -> object2->property_B() @@ -89,10 +89,13 @@ _WRAP_ENUM(BindingFlags, GBindingFlags, newin "2,44", decl_prefix GLIBMM_API) * various ways of blocking a signal emission, like Glib::SignalProxyNormal::emission_stop() * or g_signal_handler_block(). * - * A binding will be severed, and the resources it allocates freed, whenever - * either one of the Glib::ObjectBase instances it refers to is deleted, - * when unbind() is called, or when the Glib::Binding instance loses - * its last reference. + * The binding between properties is broken, and its resources freed, when the + * %Glib::Binding loses its last Glib::RefPtr, the source or target object is + * deleted, or unbind() is called. If a Glib::RefPtr to the %Glib::Binding + * remains after the binding is broken another way, get_source() + * and get_target() return an empty Glib::RefPtr. So, you must + * keep a Glib::RefPtr to the %Glib::Binding for as long as you want it to bind, + * but doing that does not guarantee the source/target are still alive or bound. * * @newin{2,44} */ @@ -144,10 +147,6 @@ public: * will be updated as well. The @a transform_from function is only used in case * of bidirectional bindings, otherwise it will be ignored. * - * The binding will automatically be removed when either the source or the - * target instance is deleted. To remove the binding without affecting the - * source and the target you can call unbind() on the returned Binding instance. - * * A Glib::ObjectBase instance can have multiple bindings. * * If you supply transformation functions, it is usually easier to use one of the |