Trait QPropertyMember 

pub trait QPropertyMember: Sized {
    // Required methods
    fn qmetatype() -> QMetaType;
    fn to_qvariant<Owner>(&self, owner: &Owner) -> QVariant
       where Owner: QObjectHolder;
    fn from_qvariant(value: &QVariant) -> Result<Self, ()>;
    fn property_eq(&self, other: &Self) -> bool;

    // Provided method
    fn to_qvariant_view<Owner, Notify>(
        &self,
        owner: &Owner,
        notify: Notify,
    ) -> QVariant
       where Owner: QObjectHolder,
             Notify: Fn(&mut Owner) + 'static { ... }
}

Enables a type to be used as a property.

Implemented for:

• Primitive numeric types and bool
• String
• Vec<T> where T is one of the above
• Rc<RefCell<T>> where T implements QObjectHolder
• Vec<Rc<RefCell<T>>> where T implements QmlRegister

You will not need to implement this trait yourself; adding support for custom types requires CXX/C++ bindings.

Required Methods

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, owner: &Owner) -> QVariant

where Owner: QObjectHolder,

Returns a QVariant representation of self for read operations. Owner is the QObjectHolder that holds this property; passing it allows returning views onto its members and borrowing correctly on access. If the member is passed by value, owner can be ignored.

fn from_qvariant(value: &QVariant) -> Result<Self, ()>

Converts value into the concrete type, used for write operations.

fn property_eq(&self, other: &Self) -> bool

Returns true if self and other are equal. Used to decide whether the notify signal should be emitted and the stored value replaced on a property write.

Provided Methods

fn to_qvariant_view<Owner, Notify>( &self, owner: &Owner, notify: Notify, ) -> QVariant

where Owner: QObjectHolder, Notify: Fn(&mut Owner) + 'static,

Returns a QVariant view of self for read operations, with access to the property’s notify signal. Unlike to_qvariant, this variant can return a live view that emits notify when the underlying data changes.

The default implementation ignores notify and falls back to to_qvariant.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl QPropertyMember for Value

Available on crate feature serde_json only.

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Value, ()>

fn property_eq(&self, other: &Value) -> bool

impl QPropertyMember for bool

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<bool, ()>

fn property_eq(&self, other: &bool) -> bool

impl QPropertyMember for f32

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<f32, ()>

fn property_eq(&self, other: &f32) -> bool

impl QPropertyMember for f64

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<f64, ()>

fn property_eq(&self, other: &f64) -> bool

impl QPropertyMember for i8

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<i8, ()>

fn property_eq(&self, other: &i8) -> bool

impl QPropertyMember for i16

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<i16, ()>

fn property_eq(&self, other: &i16) -> bool

impl QPropertyMember for i32

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<i32, ()>

fn property_eq(&self, other: &i32) -> bool

impl QPropertyMember for i64

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<i64, ()>

fn property_eq(&self, other: &i64) -> bool

impl QPropertyMember for isize

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<isize, ()>

fn property_eq(&self, other: &isize) -> bool

impl QPropertyMember for u8

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<u8, ()>

fn property_eq(&self, other: &u8) -> bool

impl QPropertyMember for u16

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<u16, ()>

fn property_eq(&self, other: &u16) -> bool

impl QPropertyMember for u32

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<u32, ()>

fn property_eq(&self, other: &u32) -> bool

impl QPropertyMember for u64

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<u64, ()>

fn property_eq(&self, other: &u64) -> bool

impl QPropertyMember for usize

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<usize, ()>

fn property_eq(&self, other: &usize) -> bool

impl QPropertyMember for String

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<String, ()>

fn property_eq(&self, other: &String) -> bool

impl QPropertyMember for Vec<Value>

Available on crate feature serde_json only.

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<Value>, ()>

fn property_eq(&self, other: &Vec<Value>) -> bool

impl QPropertyMember for Vec<bool>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<bool>, ()>

fn property_eq(&self, other: &Vec<bool>) -> bool

impl QPropertyMember for Vec<f32>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<f32>, ()>

fn property_eq(&self, other: &Vec<f32>) -> bool

impl QPropertyMember for Vec<f64>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<f64>, ()>

fn property_eq(&self, other: &Vec<f64>) -> bool

impl QPropertyMember for Vec<i8>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<i8>, ()>

fn property_eq(&self, other: &Vec<i8>) -> bool

impl QPropertyMember for Vec<i16>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<i16>, ()>

fn property_eq(&self, other: &Vec<i16>) -> bool

impl QPropertyMember for Vec<i32>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<i32>, ()>

fn property_eq(&self, other: &Vec<i32>) -> bool

impl QPropertyMember for Vec<i64>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<i64>, ()>

fn property_eq(&self, other: &Vec<i64>) -> bool

impl QPropertyMember for Vec<isize>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<isize>, ()>

fn property_eq(&self, other: &Vec<isize>) -> bool

impl QPropertyMember for Vec<u8>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<u8>, ()>

fn property_eq(&self, other: &Vec<u8>) -> bool

impl QPropertyMember for Vec<u16>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<u16>, ()>

fn property_eq(&self, other: &Vec<u16>) -> bool

impl QPropertyMember for Vec<u32>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<u32>, ()>

fn property_eq(&self, other: &Vec<u32>) -> bool

impl QPropertyMember for Vec<u64>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<u64>, ()>

fn property_eq(&self, other: &Vec<u64>) -> bool

impl QPropertyMember for Vec<usize>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<usize>, ()>

fn property_eq(&self, other: &Vec<usize>) -> bool

impl QPropertyMember for Vec<String>

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Vec<String>, ()>

fn property_eq(&self, other: &Vec<String>) -> bool

impl<T> QPropertyMember for Rc<RefCell<T>>

where T: QObjectHolder,

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, _owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn from_qvariant(value: &QVariant) -> Result<Rc<RefCell<T>>, ()>

fn property_eq(&self, other: &Rc<RefCell<T>>) -> bool

impl<T> QPropertyMember for Vec<Rc<RefCell<T>>>

where T: QmlRegister,

fn qmetatype() -> QMetaType

fn to_qvariant<Owner>(&self, owner: &Owner) -> QVariant

where Owner: QObjectHolder,

fn to_qvariant_view<Owner, Notify>( &self, owner: &Owner, notify: Notify, ) -> QVariant

where Owner: QObjectHolder, Notify: Fn(&mut Owner) + 'static,

fn from_qvariant(_value: &QVariant) -> Result<Vec<Rc<RefCell<T>>>, ()>

fn property_eq(&self, other: &Vec<Rc<RefCell<T>>>) -> bool

Implementors