class: GdkRGBALayout

[12:14] static extends: object

Generated struct layout helper for GIR record RGBA.

Methods

layout ()

Returns the Panama struct layout for RGBA.

class: GdkRGBA

[35:7] extends: object

Represents a color, in a way that is compatible with cairo’s notion of color. GdkRGBA is a convenient way to pass colors around. It’s based on cairo’s way to deal with colors and mirrors its behavior. All values are in the range from 0.0 to 1.0 inclusive. So the color (0.0, 0.0, 0.0, 0.0) represents transparent black and (1.0, 1.0, 1.0, 1.0) is opaque white. Other values will be clamped to this range when drawing.

Members

handleObj
lib
retainedCallbacks
signalHandlerNames
signalSetterHandlers

Methods

GdkRGBA (Handle = null)

Creates a new RGBA by wrapping a native handle or another wrapper.
- @p Handle is the native handle or another wrapper whose handle to adopt.
toNativeHandle (Source)

Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from fn.call(...), another generated wrapper exposing handle(), or null. Returns null when the argument carries no pointer.
- @p Source is the raw handle, raw buffer, wrapper, or null.
- @r A raw pointer carrier or null when no pointer is present.
getLib ()

Returns the opened native library for this generated wrapper.
- @r The opened native library.
handle ()

Returns the wrapped NativeHandle.
- @r The wrapped NativeHandle.
isNull ()

Returns true when the wrapped handle is null.
- @r A bool.
describe ()

Returns a small string for debugging generated wrappers.
- @r A string.
copy ()

Makes a copy of a GdkRGBA. The result must be freed through [method@Gdk.RGBA.free].
- @r A newly allocated GdkRGBA, with the same contents as @rgba.
equal (object p2)

Compares two GdkRGBA colors.
- @p p2 is another GdkRGBA.
- @r %TRUE if the two colors compare equal.
free ()

Frees a GdkRGBA.
- @r None.
hash ()

A hash function suitable for using for a hash table that stores GdkRGBAs.
- @r The hash value for @p.
is_clear ()

Checks if an @rgba value is transparent. That is, drawing with the value would not produce any change.
- @r %TRUE if the @rgba is clear.
is_opaque ()

Checks if an @rgba value is opaque. That is, drawing with the value will not retain any results from previous contents.
- @r %TRUE if the @rgba is opaque.
parse (string spec)

Parses a textual representation of a color. The string can be either one of: - A standard name (Taken from the CSS specification). - A hexadecimal value in the form “#rgb”, “#rrggbb”, “#rrrgggbbb” or ”#rrrrggggbbbb” - A hexadecimal value in the form “#rgba”, “#rrggbbaa”, or ”#rrrrggggbbbbaaaa” - A RGB color in the form “rgb(r,g,b)” (In this case the color will have full opacity) - A RGBA color in the form “rgba(r,g,b,a)” - A HSL color in the form “hsl(h,s,l)” - A HSLA color in the form “hsla(h,s,l,a)” Where “r”, “g”, “b” and “a” are respectively the red, green, blue and alpha color values. In the last two cases, “r”, “g”, and “b” are either integers in the range 0 to 255 or percentage values in the range 0% to 100%, and a is a floating point value in the range 0 to 1. The range for “h” is 0 to 360, and “s”, “l” can be either numbers in the range 0 to 100 or percentages.
- @p spec is the string specifying the color.
- @r %TRUE if the parsing succeeded.
print (object arg1String)

Generated wrapper for GIR method print. Native symbol: gdk_rgba_print.
to_string ()

Returns a textual specification of @rgba in the form rgb(r,g,b) or rgba(r,g,b,a), where “r”, “g”, “b” and “a” represent the red, green, blue and alpha values respectively. “r”, “g”, and “b” are represented as integers in the range 0 to 255, and “a” is represented as a floating point value in the range 0 to 1. These string forms are string forms that are supported by the CSS3 colors module, and can be parsed by [method@Gdk.RGBA.parse]. Note that this string representation may lose some precision, since “r”, “g” and “b” are represented as 8-bit integers. If this is a concern, you should use a different representation.
- @r A newly allocated text string.