zng::var

Trait IntoVar

pub trait IntoVar<T>where
    T: VarValue,{
    // Required method
    fn into_var(self) -> Var<T>;
}

Expand description

A value-to-var conversion that consumes the value.

Every Var<T> implements this to convert to itself, every VarValue implements this to convert to a const_var.

This trait is used by most properties, it allows then to accept literal values, variables and context variables all with a single signature. Together with Var<T> this gives properties great flexibility of usage. Widget when blocks also use IntoVar<T> to support changing the property value depending on the widget state.

Value types can also manually implement this to support a shorthand literal syntax for when they are used in properties, this converts the shorthand value like a tuple into the actual value type and wraps it into a variable, usually const_var. Value types can implement the trait multiple times to support different shorthand syntaxes.

Required Methods§

Source

fn into_var(self) -> Var<T>

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

IntoVar

Trait IntoVar Copy item path

Required Methods§

fn into_var(self) -> Var<T>

Dyn Compatibility§

Implementations on Foreign Types§

impl IntoVar<AudioCacheMode> for bool

fn into_var(self) -> Var<AudioCacheMode>

impl IntoVar<AudioOutputId> for &'static str

fn into_var(self) -> Var<AudioOutputId>

impl IntoVar<AudioOutputId> for Cow<'static, str>

fn into_var(self) -> Var<AudioOutputId>

impl IntoVar<AudioOutputId> for String

fn into_var(self) -> Var<AudioOutputId>

impl IntoVar<AudioOutputId> for char

fn into_var(self) -> Var<AudioOutputId>

impl IntoVar<AudioSource> for &Path

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for &[u8]

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for &str

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for (Uri, &'static str)

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for PathBuf

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for String

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AudioSource> for Vec<u8>

fn into_var(self) -> Var<AudioSource>

impl IntoVar<AutoSelection> for bool

fn into_var(self) -> Var<AutoSelection>

impl IntoVar<AutoSize> for bool

fn into_var(self) -> Var<AutoSize>

impl IntoVar<BlockWindowLoad> for Duration

fn into_var(self) -> Var<BlockWindowLoad>

impl IntoVar<BlockWindowLoad> for bool

fn into_var(self) -> Var<BlockWindowLoad>

impl IntoVar<BorderRepeats> for bool

fn into_var(self) -> Var<BorderRepeats>

impl IntoVar<ByteLength> for u64

fn into_var(self) -> Var<ByteLength>

impl IntoVar<CaptureMode> for bool

fn into_var(self) -> Var<CaptureMode>

impl IntoVar<CaretIndex> for usize

fn into_var(self) -> Var<CaretIndex>

impl IntoVar<CategoryId> for &'static str

fn into_var(self) -> Var<CategoryId>

impl IntoVar<CategoryId> for String

fn into_var(self) -> Var<CategoryId>

impl IntoVar<CharVariant> for u8

fn into_var(self) -> Var<CharVariant>

impl IntoVar<CollapseMode> for bool

fn into_var(self) -> Var<CollapseMode>

impl IntoVar<ColorMatrix> for [f32; 20]

fn into_var(self) -> Var<ColorMatrix>

impl IntoVar<CommandScope> for &'static str

fn into_var(self) -> Var<CommandScope>

impl IntoVar<ContextCapture> for bool

fn into_var(self) -> Var<ContextCapture>

impl IntoVar<CornerRadius> for f32

fn into_var(self) -> Var<CornerRadius>

impl IntoVar<CornerRadius> for i32

fn into_var(self) -> Var<CornerRadius>

impl IntoVar<CursorSource> for bool

fn into_var(self) -> Var<CursorSource>

impl IntoVar<Deadline> for Duration

fn into_var(self) -> Var<Deadline>

impl IntoVar<DialogKind> for bool

fn into_var(self) -> Var<DialogKind>

impl IntoVar<Factor> for bool

fn into_var(self) -> Var<Factor>

impl IntoVar<Factor> for f32

fn into_var(self) -> Var<Factor>

impl IntoVar<FileDialogFilters> for &'static str

fn into_var(self) -> Var<FileDialogFilters>

impl IntoVar<FontAntiAliasing> for bool

fn into_var(self) -> Var<FontAntiAliasing>

impl IntoVar<FontColorPalette> for u16

fn into_var(self) -> Var<FontColorPalette>

Trait IntoVar