Enum gdk::VisualType

#[non_exhaustive]
pub enum VisualType {
    StaticGray,
    Grayscale,
    StaticColor,
    PseudoColor,
    TrueColor,
    DirectColor,
    // some variants omitted
}

A set of values that describe the manner in which the pixel values for a visual are converted into RGB values for display.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

StaticGray

Each pixel value indexes a grayscale value directly.

Grayscale

Each pixel is an index into a color map that maps pixel values into grayscale values. The color map can be changed by an application.

StaticColor

Each pixel value is an index into a predefined, unmodifiable color map that maps pixel values into RGB values.

PseudoColor

Each pixel is an index into a color map that maps pixel values into rgb values. The color map can be changed by an application.

TrueColor

Each pixel value directly contains red, green, and blue components. Use Visual::red_pixel_details(), etc, to obtain information about how the components are assembled into a pixel value.

DirectColor

Each pixel value contains red, green, and blue components as for TrueColor, but the components are mapped via a color table into the final output table instead of being converted directly.

Trait Implementations

impl Clone for VisualType

fn clone(&self) -> VisualType

Returns a copy of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VisualType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for VisualType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> FromValue<'a> for VisualType

type Checker = GenericValueTypeChecker<VisualType>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl Hash for VisualType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,

Feeds a slice of this type into the given Hasher.

impl Ord for VisualType

fn cmp(&self, other: &VisualType) -> Ordering

This method returns an Ordering between self and other.

const fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

const fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

const fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<VisualType> for VisualType

fn eq(&self, other: &VisualType) -> bool

This method tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<VisualType> for VisualType

fn partial_cmp(&self, other: &VisualType) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

const fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

const fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

const fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

const fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for VisualType

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for VisualType

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifer of self.

impl ValueType for VisualType

type Type = VisualType

Type to get the Type from.

impl Copy for VisualType

impl Eq for VisualType

impl StructuralEq for VisualType

impl StructuralPartialEq for VisualType