Struct trinket::QRCode [−][src]
pub struct QRCode(_);
Expand description
A widget that display a QR Code.
The QR code of QRCode
is set with the QRCodeExt::set_bytes()
method. It is recommended for a QR Code to have a quiet zone, i.e. a margin of
four times the value of QRCodeExt::block_size()
, in most contexts, widgets
already count with such a margin.
The code can be themed via css, where a recommended quiet-zone can be as a padding:
.qrcode {
color: black;
background: white;
padding: 24px; /* 4 ⨉ block-size */
}
Implements: QRCodeExt.
Implementations
Trait Implementations
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Returns the type identifier of Self
.
Auto Trait Implementations
impl RefUnwindSafe for QRCode
impl UnwindSafe for QRCode
Blanket Implementations
Mutably borrows from an owned value. Read more
fn upcast<T>(self) -> T where
T: ObjectType,
Self: IsA<T>,
fn upcast<T>(self) -> T where
T: ObjectType,
Self: IsA<T>,
Upcasts an object to a superclass or interface T
. Read more
fn upcast_ref<T>(&self) -> &T where
T: ObjectType,
Self: IsA<T>,
fn upcast_ref<T>(&self) -> &T where
T: ObjectType,
Self: IsA<T>,
Upcasts an object to a reference of its superclass or interface T
. Read more
Tries to downcast to a subclass or interface implementor T
. Read more
fn downcast_ref<T>(&self) -> Option<&T> where
T: ObjectType,
Self: CanDowncast<T>,
fn downcast_ref<T>(&self) -> Option<&T> where
T: ObjectType,
Self: CanDowncast<T>,
Tries to downcast to a reference of its subclass or interface implementor T
. Read more
fn dynamic_cast<T>(self) -> Result<T, Self> where
T: ObjectType,
fn dynamic_cast<T>(self) -> Result<T, Self> where
T: ObjectType,
Tries to cast to an object of type T
. This handles upcasting, downcasting
and casting between interface and interface implementors. All checks are performed at
runtime, while downcast
and upcast
will do many checks at compile-time already. Read more
fn dynamic_cast_ref<T>(&self) -> Option<&T> where
T: ObjectType,
fn dynamic_cast_ref<T>(&self) -> Option<&T> where
T: ObjectType,
Tries to cast to reference to an object of type T
. This handles upcasting, downcasting
and casting between interface and interface implementors. All checks are performed at
runtime, while downcast
and upcast
will do many checks at compile-time already. Read more
unsafe fn unsafe_cast<T>(self) -> T where
T: ObjectType,
unsafe fn unsafe_cast<T>(self) -> T where
T: ObjectType,
Casts to T
unconditionally. Read more
unsafe fn unsafe_cast_ref<T>(&self) -> &T where
T: ObjectType,
unsafe fn unsafe_cast_ref<T>(&self) -> &T where
T: ObjectType,
Casts to &T
unconditionally. Read more
Returns true
if the object is an instance of (can be cast to) T
.
pub fn type_(&self) -> Type
pub fn object_class(&self) -> &Class<Object>
pub fn class(&self) -> &Class<T> where
T: IsClass,
pub fn set_property<'a, N, V>(
&self,
property_name: N,
value: V
) -> Result<(), BoolError> where
N: Into<&'a str>,
V: ToValue,
pub fn set_property_from_value<'a, N>(
&self,
property_name: N,
value: &Value
) -> Result<(), BoolError> where
N: Into<&'a str>,
pub fn set_properties_from_value(
&self,
property_values: &[(&str, Value)]
) -> Result<(), BoolError>
pub fn has_property<'a, N>(&self, property_name: N, type_: Option<Type>) -> bool where
N: Into<&'a str>,
pub fn property_type<'a, N>(&self, property_name: N) -> Option<Type> where
N: Into<&'a str>,
pub fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where
N: Into<&'a str>,
pub fn list_properties(&self) -> Vec<ParamSpec, Global>
pub fn freeze_notify(&self) -> PropertyNotificationFreezeGuard
Safety Read more
pub unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD> where
QD: 'static,
pub unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD> where
QD: 'static,
Safety Read more
pub unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD> where
QD: 'static,
pub unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD> where
QD: 'static,
Safety Read more
pub fn block_signal(&self, handler_id: &SignalHandlerId)
pub fn unblock_signal(&self, handler_id: &SignalHandlerId)
pub fn stop_signal_emission(&self, signal_name: &str)
pub fn connect<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
Same as connect
but takes a SignalId
instead of a signal name.
pub fn connect_local<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: 'static + Fn(&[Value]) -> Option<Value>,
Same as connect_local
but takes a SignalId
instead of a signal name.
pub unsafe fn connect_unsafe<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: Fn(&[Value]) -> Option<Value>,
Same as connect_unsafe
but takes a SignalId
instead of a signal name.
Emit signal by signal id.
pub fn emit_with_values(
&self,
signal_id: SignalId,
args: &[Value]
) -> Result<Option<Value>, BoolError>
pub fn emit_with_values(
&self,
signal_id: SignalId,
args: &[Value]
) -> Result<Option<Value>, BoolError>
Same as emit
but takes Value
for the arguments.
Emit signal by its name.
Same as emit_by_name
but takes Value
for the arguments.
pub fn emit_with_details(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError>
pub fn emit_with_details(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError>
Emit signal with details by signal id.
pub fn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Result<Option<Value>, BoolError>
pub fn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Result<Option<Value>, BoolError>
Same as emit_with_details
but takes Value
for the arguments.
pub fn disconnect(&self, handler_id: SignalHandlerId)
pub fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
pub fn connect_notify_local<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec),
pub unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec),
pub fn notify_by_pspec(&self, pspec: &ParamSpec)
pub fn downgrade(&self) -> WeakRef<T>
pub fn to_send_value(&self) -> SendValue
pub fn to_send_value(&self) -> SendValue
Returns a SendValue
clone of self
.