gtkmm: Gtk::ObjectExpression< T > Class Template Reference

#include <gtkmm/expression.h>

Inheritance diagram for Gtk::ObjectExpression< T >:

Static Public Member Functions

static GType get_type ()
 Get the GType for this class, for use with the underlying GObject type system. More...

 
static Glib::RefPtr< ObjectExpression< T > > create (const T& object)
 Creates an expression evaluating to the given object with a weak reference. More...

 

Additional Inherited Members

- Public Types inherited from Gtk::Expression< T >
using ValueType = T
 
- Public Types inherited from Gtk::ExpressionBase
using SlotNotify = sigc::slot< void()>
 For instance: void on_notify();. More...

 
- Public Member Functions inherited from Gtk::Expression< T >
std::optional< T > evaluate (const Glib::RefPtr< Glib::ObjectBase >& this_)
 Evaluates the given expression and on success returns the result. More...

 
Glib::RefPtr< ExpressionWatch< T > > watch (const Glib::RefPtr< Glib::ObjectBase >& this_, const SlotNotify& notify)
 Installs a watch for the expression that calls the notify function whenever the evaluation of the expression may have changed. More...

 
template<class T2 >
Glib::RefPtr< ExpressionWatch< T > > bind (const Glib::PropertyProxy< T2 >& property, const Glib::RefPtr< Glib::ObjectBase >& this_=nullptr)
 Bind a target's property to the expression. More...

 
template<class T2 >
Glib::RefPtr< ExpressionWatch< T > > bind (const Glib::PropertyProxy_WriteOnly< T2 >& property, const Glib::RefPtr< Glib::ObjectBase >& this_=nullptr)
 Bind a target's property to the expression. More...

 
- Public Member Functions inherited from Gtk::ExpressionBase
void reference () const
 Increment the reference count for this object. More...

 
void unreference () const
 Decrement the reference count for this object. More...

 
GtkExpression* gobj ()
 Provides access to the underlying C instance. More...

 
const GtkExpression* gobj () const
 Provides access to the underlying C instance. More...

 
GtkExpression* gobj_copy () const
 Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...

 
 ExpressionBase ()=delete
 
 ExpressionBase (const ExpressionBase&)=delete
 
ExpressionBaseoperator= (const ExpressionBase&)=delete
 
GType get_value_type () const
 Gets the GType that this expression evaluates to. More...

 
bool is_static () const
 Checks if the expression is static. More...

 
- Protected Member Functions inherited from Gtk::ExpressionBase
void operator delete (void*, std::size_t)
 

Member Function Documentation

template <class T >
static Glib::RefPtr<ObjectExpression<T> > Gtk::ObjectExpression< T >::create ( const T &  object)
static

Creates an expression evaluating to the given object with a weak reference.

Once the object is disposed, it will fail to evaluate. This expression is meant to break reference cycles.

If you want to keep a reference to object, use Gtk::ConstantExpression::create().

Parameters
objectObject to watch.
Returns
A new Gtk::Expression.
template <class T >
static GType Gtk::ObjectExpression< T >::get_type ( )
static

Get the GType for this class, for use with the underlying GObject type system.