gtkmm 4.14.0
Static Public Member Functions | List of all members
Gtk::ClosureExpression< T > Class Template Referencefinal

#include <gtkmm/expression.h>

Inheritance diagram for Gtk::ClosureExpression< T >:
Inheritance graph
[legend]

Static Public Member Functions

static GType get_type ()
 Get the GType for this class, for use with the underlying GObject type system.
 
template<class S , class... ATs>
static Glib::RefPtr< ClosureExpression< T > > create (S slot, const Glib::RefPtr< ATs > &... params)
 Creates a Gtk::Expression that calls slot when it is evaluated.
 

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();.
 
- 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.
 
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.
 
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.
 
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.
 
- Public Member Functions inherited from Gtk::ExpressionBase
void reference () const
 Increment the reference count for this object.
 
void unreference () const
 Decrement the reference count for this object.
 
GtkExpressiongobj ()
 Provides access to the underlying C instance.
 
const GtkExpressiongobj () const
 Provides access to the underlying C instance.
 
GtkExpressiongobj_copy () const
 Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
 
 ExpressionBase ()=delete
 
 ExpressionBase (const ExpressionBase &)=delete
 
ExpressionBaseoperator= (const ExpressionBase &)=delete
 
GType get_value_type () const
 Gets the GType that this expression evaluates to.
 
bool is_static () const
 Checks if the expression is static.
 
- Protected Member Functions inherited from Gtk::ExpressionBase
void operator delete (void *, std::size_t)
 

Member Function Documentation

◆ create()

template <class T >
template <class S , class... ATs>
static Glib::RefPtr< ClosureExpression< T > > Gtk::ClosureExpression< T >::create ( S  slot,
const Glib::RefPtr< ATs > &...  params 
)
static

Creates a Gtk::Expression that calls slot when it is evaluated.

slot is called with the this object and the results of evaluating the params expressions.

Example:

Glib::ustring get_string(Glib::RefPtr<Glib::ObjectBase> this_, double a, int b)
{
return Glib::ustring::sprintf("a is %f, b is %d", a, b);
}
Glib::RefPtr<Gtk::Expression<double>> expr1 = ...
Glib::RefPtr<Gtk::Expression<int>> expr2 = ...
Glib::RefPtr<Gtk::Expression<Glib::ustring>> expr3 =
sigc::ptr_fun(get_string), expr1, expr2);
static Glib::RefPtr< ClosureExpression< T > > create(S slot, const Glib::RefPtr< ATs > &... params)
Creates a Gtk::Expression that calls slot when it is evaluated.
Expressions to values.
Definition expression.h:173
Parameters
slotSlot to call when evaluating this expression.
paramsExpressions for each parameter.
Returns
A new Gtk::Expression.

◆ get_type()

template <class T >
static GType Gtk::ClosureExpression< T >::get_type ( )
static

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