Gradient

open class Gradient : GradientProtocol

GtkGradient is a boxed type that represents a gradient. It is the result of parsing a gradient expression. To obtain the gradient represented by a GtkGradient, it has to be resolved with gtk_gradient_resolve(), which replaces all symbolic color references by the colors they refer to (in a given context) and constructs a cairo_pattern_t value.

It is not normally necessary to deal directly with GtkGradients, since they are mostly used behind the scenes by GtkStyleContext and GtkCssProvider.

GtkGradient is deprecated. It was used internally by GTK’s CSS engine to represent gradients. As its handling is not conforming to modern web standards, it is not used anymore. If you want to use gradients in your own code, please use Cairo directly.

The Gradient type acts as a reference-counted owner of an underlying GtkGradient instance. It provides the methods that can operate on this data type through GradientProtocol conformance. Use Gradient as a strong reference or owner of a GtkGradient instance.

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  • ptr 
    Untyped pointer to the underlying `GtkGradient` instance.

    For type-safe access, use the generated, typed pointer gradient_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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  • Designated initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafeMutablePointer<GtkGradient>)

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafePointer<GtkGradient>)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from a non-mutating gpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init!(gpointer op: gpointer?)

    Parameters

    op

    gpointer to the underlying object
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  • Optional initialiser from a non-mutating gconstpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init!(gconstpointer op: gconstpointer?)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafePointer<GtkGradient>?)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafeMutablePointer<GtkGradient>?)

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from the underlying C data type. Will retain GtkGradient. i.e., ownership is transferred to the Gradient instance.

    Declaration

    Swift

    @inlinable
public init(retaining op: UnsafeMutablePointer<GtkGradient>)

    Parameters

    op

    pointer to the underlying object
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  • Reference intialiser for a related type that implements GradientProtocol Will retain GtkGradient.

    Declaration

    Swift

    @inlinable
public init<T>(_ other: T) where T : GradientProtocol

    Parameters

    other

    an instance of a related type that implements GradientProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init<T>(cPointer p: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
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  • Unsafe typed, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init<T>(retainingCPointer cPointer: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init(raw p: UnsafeRawPointer)

    Parameters

    p

    raw pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public required init(raw p: UnsafeMutableRawPointer)

    Parameters

    p

    mutable raw pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingRaw raw: UnsafeMutableRawPointer)

    Parameters

    raw

    mutable raw pointer to the underlying object
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init(opaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to GradientProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • Creates a new linear gradient along the line defined by (x0, y0) and (x1, y1). Before using the gradient a number of stop colors must be added through gtk_gradient_add_color_stop().

    new_linear is deprecated:

    GtkGradient is deprecated.

    Declaration

    Swift

    @available(*, deprecated)
@inlinable
public init(linear x0: Double, y0: Double, x1: Double, y1: Double)
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  • Creates a new radial gradient along the two circles defined by (x0, y0, radius0) and (x1, y1, radius1). Before using the gradient a number of stop colors must be added through gtk_gradient_add_color_stop().

    new_radial is deprecated:

    GtkGradient is deprecated.

    Declaration

    Swift

    @available(*, deprecated)
@inlinable
public init(radial x0: Double, y0: Double, radius0: Double, x1: Double, y1: Double, radius1: Double)
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  • Creates a new linear gradient along the line defined by (x0, y0) and (x1, y1). Before using the gradient a number of stop colors must be added through gtk_gradient_add_color_stop().

    new_linear is deprecated:

    GtkGradient is deprecated.

    Declaration

    Swift

    @available(*, deprecated)
@inlinable
public static func new(linear x0: Double, y0: Double, x1: Double, y1: Double) -> Gradient!
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  • Creates a new radial gradient along the two circles defined by (x0, y0, radius0) and (x1, y1, radius1). Before using the gradient a number of stop colors must be added through gtk_gradient_add_color_stop().

    new_radial is deprecated:

    GtkGradient is deprecated.

    Declaration

    Swift

    @available(*, deprecated)
@inlinable
public static func new(radial x0: Double, y0: Double, radius0: Double, x1: Double, y1: Double, radius1: Double) -> Gradient!
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