glibmm: Glib::ExtraClassInit Class Reference
A convenience class for named custom types. More...
#include <glibmm/extraclassinit.h>
Inheritance diagram for Glib::ExtraClassInit:
Protected Member Functions | |
ExtraClassInit (GClassInitFunc class_init_func, void* class_data=nullptr, GInstanceInitFunc instance_init_func=nullptr) | |
Constructor. More... | |
Protected Member Functions inherited from Glib::ObjectBase | |
ObjectBase () | |
This default constructor is called implicitly from the constructor of user-derived classes, even if, for instance, Gtk::Button calls a different ObjectBase constructor. More... | |
ObjectBase (const char* custom_type_name) | |
A derived constructor always overrides this choice. More... | |
ObjectBase (const std::type_info& custom_type_info) | |
This constructor is a special feature to allow creation of derived types on the fly, without having to use g_object_new() manually. More... | |
ObjectBase (ObjectBase&& src) noexcept | |
ObjectBase& | operator= (ObjectBase&& src) noexcept |
virtual | ~ObjectBase () noexcept=0 |
void | initialize (GObject* castitem) |
void | initialize_move (GObject* castitem, Glib::ObjectBase* previous_wrapper) |
Additional Inherited Members | |
Public Types inherited from sigc::trackable | |
typedef internal::func_destroy_notify | func_destroy_notify |
Public Types inherited from sigc::notifiable | |
typedef internal::func_destroy_notify | func_destroy_notify |
Public Member Functions inherited from Glib::ObjectBase | |
ObjectBase (const ObjectBase&)=delete | |
ObjectBase& | operator= (const ObjectBase&)=delete |
void | set_property_value (const Glib::ustring& property_name, const Glib::ValueBase& value) |
You probably want to use a specific property_*() accessor method instead. More... | |
void | get_property_value (const Glib::ustring& property_name, Glib::ValueBase& value) const |
You probably want to use a specific property_*() accessor method instead. More... | |
template<class PropertyType > | |
void | set_property (const Glib::ustring& property_name, const PropertyType& value) |
You probably want to use a specific property_*() accessor method instead. More... | |
template<class PropertyType > | |
void | get_property (const Glib::ustring& property_name, PropertyType& value) const |
You probably want to use a specific property_*() accessor method instead. More... | |
template<class PropertyType > | |
PropertyType | get_property (const Glib::ustring& property_name) const |
You probably want to use a specific property_*() accessor method instead. More... | |
sigc::connection | connect_property_changed (const Glib::ustring& property_name, const sigc::slot< void()>& slot) |
You can use the signal_changed() signal of the property proxy instead. More... | |
sigc::connection | connect_property_changed (const Glib::ustring& property_name, sigc::slot< void()>&& slot) |
You can use the signal_changed() signal of the property proxy instead. More... | |
void | freeze_notify () |
Increases the freeze count on object. More... | |
void | thaw_notify () |
Reverts the effect of a previous call to freeze_notify(). More... | |
virtual void | reference () const |
Increment the reference count for this object. More... | |
virtual void | unreference () const |
Decrement the reference count for this object. More... | |
GObject* | gobj () |
Provides access to the underlying C GObject. More... | |
const GObject* | gobj () const |
Provides access to the underlying C GObject. More... | |
GObject* | gobj_copy () const |
Give a ref-ed copy to someone. Use for direct struct access. More... | |
Public Member Functions inherited from sigc::trackable | |
trackable () noexcept | |
trackable (const trackable &src) noexcept | |
trackable (trackable &&src) noexcept | |
~trackable () | |
void | add_destroy_notify_callback (notifiable *data, func_destroy_notify func) const |
void | notify_callbacks () |
trackable & | operator= (const trackable &src) |
trackable & | operator= (trackable &&src) noexcept |
void | remove_destroy_notify_callback (notifiable *data) const |
Detailed Description
A convenience class for named custom types.
Use it if you need to add code to GType's class init function and/or need an instance init function. Example:
#include <glibmm/extraclassinit.h>
{
public:
MyExtraInit(const Glib::ustring& css_name)
:
Glib::ExtraClassInit(my_extra_class_init_function,& m_css_name, my_instance_init_function),
m_css_name(css_name)
{ }
private:
static void my_extra_class_init_function(void* g_class, void* class_data)
{
const auto klass = static_cast<GtkWidgetClass*>(g_class);
gtk_widget_class_set_css_name(klass, css_name->c_str());
}
static void my_instance_init_function(GTypeInstance* instance, void* g_class)
{
gtk_widget_set_has_surface(GTK_WIDGET(instance), true);
}
Glib::ustring m_css_name;
};
class MyWidget : public MyExtraInit, public Gtk::Widget
{
public:
MyWidget()
:
// The GType name will be gtkmm__CustomObject_MyWidget
MyExtraInit("my-widget"),
Gtk::Widget()
{
// ...
}
// ...
};
- Note
- Classes derived from ExtraClassInit (MyExtraInit in the example) must be listed before Glib::Object or a class derived from Glib::Object (Gtk::Widget in the example) in the list of base classes.
Constructor & Destructor Documentation
|
explicitprotected |
Constructor.
- Parameters
-
class_init_func Pointer to an extra class init function. nullptr, if no extra class init function is needed. class_data Class data pointer, passed to the class init function. Can be nullptr, if the class init function does not need it. instance_init_func Pointer to an instance init function. nullptr, if no instance init function is needed.