QtMvvm::Binding Class Reference

A handle to a multidirectional binding between properties. More...

#include <binding.h>

Public Types
enum	BindingDirectionFlag { SingleInit = 0x01, OneWayToView = (0x02 | SingleInit), OneWayToViewModel = 0x04, TwoWay = (OneWayToView | OneWayToViewModel) }
	Flags to control how to bind the properties. More...

Public Member Functions
bool	isValid () const
	Specifies whether the binding is a valid and active binding. More...
Q_INVOKABLE void	unbind ()
	Remove the binding by disconnecting all change signals.

Detailed Description

A handle to a multidirectional binding between properties.

This class is returned by the bind() function as a handle to a binding. It can be used to check if the binding is valid and can remove a binding again.

Note

You don't need to keep the Binding as reference. The binding will stay even if you don't hold any references to it. This class serves as a passive watcher over a binding.

See also

QtMvvm::bind

Definition at line 14 of file binding.h.

Member Enumeration Documentation

BindingDirectionFlag

enum QtMvvm::Binding::BindingDirectionFlag

Flags to control how to bind the properties.

Enumerator
SingleInit	Only initialize the view by settings it to the viewmodels value on creation.
OneWayToView	All changes done to the viewmodel are propagated to the view.
OneWayToViewModel	All changes done to the view are propagated to the viewmodel.
TwoWay	All changes on both sides are propagated to the other one.

Definition at line 20 of file binding.h.

Member Function Documentation

isValid()

QtMvvm::Binding::isValid

(

)

const

Specifies whether the binding is a valid and active binding.

Returns

true If the binding is valid and active, false if invalid or already unbound

A binding is considered valid is if has successfully been set up and has not been unbound yet. A valid binding means view and viewModel are valid can the properties could be found.

See also

Binding::unbind, bind()

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The documentation for this class was generated from the following files:

• binding.h
• binding.dox