GtkGradient is a boxed type that represents a gradient. It is the result of parsing a [gradient expression][gtkcssprovider-gradients]. 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 Gtk_Gradients, since they are mostly used behind the scenes by Gtk.Style_Context.Gtk_Style_Context and Gtk.Css_Provider.Gtk_Css_Provider.
Gtk.Gradient.Gtk_Gradient 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.
procedure Add_Color_Stop
(Self : Gtk_Gradient;
Offset : Gdouble;
Color : Gtk.Symbolic_Color.Gtk_Symbolic_Color)
Adds a stop color to Gradient. Since: gtk+ 3.0 Deprecated since 3.8, 1
offset for the color stop
color to use
function From_Object (Object : System.Address) return Gtk_Gradient
function From_Object_Free (B : access Gtk_Gradient'Class) return Gtk_Gradient
function Get_Type return Glib.GType
type Gtk_Gradient is new Glib.C_Boxed with null record;
function Gtk_Gradient_New_Linear
(X0 : Gdouble;
Y0 : Gdouble;
X1 : Gdouble;
Y1 : Gdouble) return Gtk_Gradient
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. Since: gtk+ 3.0
X coordinate of the starting point
Y coordinate of the starting point
X coordinate of the end point
Y coordinate of the end point
function Gtk_Gradient_New_Radial
(X0 : Gdouble;
Y0 : Gdouble;
Radius0 : Gdouble;
X1 : Gdouble;
Y1 : Gdouble;
Radius1 : Gdouble) return Gtk_Gradient
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. Since: gtk+ 3.0
X coordinate of the start circle
Y coordinate of the start circle
radius of the start circle
X coordinate of the end circle
Y coordinate of the end circle
radius of the end circle
procedure Gtk_New_Linear
(Self : out Gtk_Gradient;
X0 : Gdouble;
Y0 : Gdouble;
X1 : Gdouble;
Y1 : Gdouble)
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. Since: gtk+ 3.0
X coordinate of the starting point
Y coordinate of the starting point
X coordinate of the end point
Y coordinate of the end point
procedure Gtk_New_Radial
(Self : out Gtk_Gradient;
X0 : Gdouble;
Y0 : Gdouble;
Radius0 : Gdouble;
X1 : Gdouble;
Y1 : Gdouble;
Radius1 : Gdouble)
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. Since: gtk+ 3.0
X coordinate of the start circle
Y coordinate of the start circle
radius of the start circle
X coordinate of the end circle
Y coordinate of the end circle
radius of the end circle
Null_Gtk_Gradient : constant Gtk_Gradient;
function Ref (Self : Gtk_Gradient) return Gtk_Gradient
Increases the reference count of Gradient. Since: gtk+ 3.0 Deprecated since 3.8, 1
The same Gradient
function Resolve
(Self : Gtk_Gradient;
Props : not null access Gtk.Style_Properties.Gtk_Style_Properties_Record'Class;
Resolved_Gradient : access Cairo.Cairo_Pattern) return Boolean
If Gradient is resolvable, Resolved_Gradient will be filled in with the resolved gradient as a cairo_pattern_t, and True will be returned. Generally, if Gradient can't be resolved, it is due to it being defined on top of a named color that doesn't exist in Props. Since: gtk+ 3.0 Deprecated since 3.8, 1
Gtk.Style_Properties.Gtk_Style_Properties to use when resolving named colors
return location for the resolved pattern
True if the gradient has been resolved
function Resolve_For_Context
(Self : Gtk_Gradient;
Context : not null access Gtk.Style_Context.Gtk_Style_Context_Record'Class)
return Cairo.Cairo_Pattern
function To_String (Self : Gtk_Gradient) return UTF8_String
Creates a string representation for Gradient that is suitable for using in GTK CSS files. Deprecated since 3.8, 1
A string representation for Gradient
procedure Unref (Self : Gtk_Gradient)
Decreases the reference count of Gradient, freeing its memory if the reference count reaches 0. Since: gtk+ 3.0 Deprecated since 3.8, 1