xtd::drawing::drawing_2d::linear_gradient_brush Class Reference

Inheritance diagram for xtd::drawing::drawing_2d::linear_gradient_brush:

Definition

Encapsulates a xtd::drawing::brush with a linear gradient. This class cannot be inherited.

Namespace

xtd::drawing::drawing_2d

Library

xtd.drawing

Examples

The following code example demonstrates the use of linear_gradient_brush class.

#include <xtd/xtd>
 
namespace fill_rectangle_example {
  class form1 : public form {
  public:
    form1() {
      text("Fill rectangle example");
      client_size({680, 340});
    }
    
  protected:
    void on_paint(paint_event_args& e) override {
      form::on_paint(e);
      
      auto back_color = color::navy;
      auto fore_color = color::white;
      
      e.graphics().fill_rectangle(solid_brush {color::transparent}, rectangle {10, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {10, 10, 150, 150});
      
      e.graphics().fill_rectangle(solid_brush {back_color}, rectangle {180, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {180, 10, 150, 150});
      
      e.graphics().fill_rectangle(texture_brush {create_circle_texture(fore_color, back_color)}, rectangle {350, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {350, 10, 150, 150});
      
      e.graphics().fill_rectangle(drawing_2d::hatch_brush {drawing_2d::hatch_style::diagonal_brick, color::white, back_color}, rectangle {520, 10, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {520, 10, 150, 150});
      
      e.graphics().fill_rectangle(drawing_2d::conical_gradient_brush {point {85, 255}, back_color, fore_color, 0}, rectangle {10, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {10, 180, 150, 150});
      
      e.graphics().fill_rectangle(drawing_2d::linear_gradient_brush {rectangle {180, 180, 150, 150}, back_color, fore_color, 315}, rectangle {180, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {180, 180, 150, 150});
      
      e.graphics().fill_rectangle(drawing_2d::radial_gradient_brush {point {425, 255}, fore_color, back_color, 73}, rectangle {350, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {350, 180, 150, 150});
    }
    
  private:
    auto create_circle_texture(const color& fore_color, const color& back_color)->image {
      auto texture = bitmap {16, 16};
      auto graphics = texture.create_graphics();
      graphics.fill_ellipse(solid_brush {back_color}, 1, 1, texture.width() - 2, texture.height() - 2);
      graphics.draw_ellipse(pen {fore_color, 2}, 1, 1, texture.width() - 2, texture.height() - 2);
      return texture;
    }
  };
}
 
auto main() -> int {
  application::run(fill_rectangle_example::form1 {});
}

Examples

form_paint.cpp, and graphics.cpp.

Public Constructors
	linear_gradient_brush ()
	Initializes a new instance of the xtd::drawing::drawing_2d::radial_gradient_brush class with default values.
	linear_gradient_brush (const xtd::drawing::point &point1, const xtd::drawing::point &point2, const xtd::drawing::color &color1, const xtd::drawing::color &color2)
	Initializes a new instance of the linear_gradient_brush class with the specified points and colors.
	linear_gradient_brush (const xtd::drawing::point_f &point1, const xtd::drawing::point_f &point2, const xtd::drawing::color &color1, const xtd::drawing::color &color2)
	Initializes a new instance of the linear_gradient_brush class with the specified points and colors.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2, xtd::drawing::drawing_2d::linear_gradient_mode linear_gradient_modelinear_gradient_mode)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2, float angle)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2, xtd::drawing::drawing_2d::linear_gradient_mode linear_gradient_modelinear_gradient_mode)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2, float angle)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::drawing::color &color1, const xtd::drawing::color &color2)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.
	linear_gradient_brush (const xtd::drawing::point &point1, const xtd::drawing::point &point2, const xtd::array< xtd::drawing::color > &linear_colors)
	Initializes a new instance of the linear_gradient_brush class with the specified points and colors.
	linear_gradient_brush (const xtd::drawing::point_f &point1, const xtd::drawing::point_f &point2, const xtd::array< xtd::drawing::color > &linear_colors)
	Initializes a new instance of the linear_gradient_brush class with the specified points and colors.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::array< xtd::drawing::color > &linear_colors, xtd::drawing::drawing_2d::linear_gradient_mode linear_gradient_modelinear_gradient_mode)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::array< xtd::drawing::color > &linear_colors, float angle)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::array< xtd::drawing::color > &linear_colors, xtd::drawing::drawing_2d::linear_gradient_mode linear_gradient_modelinear_gradient_mode)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::array< xtd::drawing::color > &linear_colors, float angle)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.
	linear_gradient_brush (const xtd::drawing::rectangle &rect, const xtd::array< xtd::drawing::color > &linear_colors)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.
	linear_gradient_brush (const xtd::drawing::rectangle_f &rect, const xtd::array< xtd::drawing::color > &linear_colors)
	Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.

Public Properties
auto	angle () const noexcept -> float
	Gets the angle of the gradient.
auto	angle (float value) noexcept -> linear_gradient_brush &
	Sets the angle of the gradient.
auto	linear_colors () const noexcept -> const xtd::drawing::drawing_2d::gradient_stop_collection &
	Gets the starting and ending colors of the gradient.
auto	linear_colors (const xtd::drawing::drawing_2d::gradient_stop_collection &value) -> linear_gradient_brush &
	sets the starting and ending colors of the gradient.
auto	rectangle () const noexcept -> const xtd::drawing::rectangle_f &
	Gets a rectangular region that defines the starting and ending points of the linear gradient.
auto	rectangle (const xtd::drawing::rectangle_f &value) noexcept -> linear_gradient_brush &
	Sets a rectangular region that defines the starting and ending points of the linear gradient.
auto	rectangle (const xtd::drawing::rectangle &value) noexcept -> linear_gradient_brush &
	Sets a rectangular region that defines the starting and ending points of the linear gradient.

Additional Inherited Members
auto	handle () const noexcept -> intptr
	Gets the handle of the brush.
auto	equals (const xtd::object &obj) const noexcept -> bool override
	Determines whether the specified object is equal to the current object.
auto	equals (const brush &other) const noexcept -> bool override
	Determines whether the specified object is equal to the current object.
auto	get_hash_code () const noexcept -> xtd::usize override
	Serves as a hash function for a particular type.
auto	to_string () const noexcept -> xtd::string override
	Converts this brush object to a human-readable string.
	object ()=default
	Create a new instance of the ultimate base class object.
virtual auto	get_type () const noexcept -> type_object
	Gets the type of the current instance.
template<typename object_t>
auto	memberwise_clone () const -> xtd::unique_ptr_object< object_t >
	Creates a shallow copy of the current object.
virtual auto	equals (const brush &) const noexcept -> bool=0
	Indicates whether the current object is equal to another object of the same type.
template<typename object_a_t, typename object_b_t>
static auto	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept -> bool
	Determines whether the specified object instances are considered equal.
template<typename object_a_t, typename object_b_t>
static auto	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept -> bool
	Determines whether the specified object instances are the same instance.
	brush ()
	Initialize a new instance of brush class.
auto	set_native_brush (intptr brush) -> void
	In a derived class, sets a reference to a GDI+ brush object.

Constructor & Destructor Documentation

linear_gradient_brush() [1/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush

(

)

Initializes a new instance of the xtd::drawing::drawing_2d::radial_gradient_brush class with default values.

Remarks

Rectanlge is set to {0, 0, 0, 0} and colors are set with two transparent colors.

linear_gradient_brush() [2/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::point &	point1,
		const xtd::drawing::point &	point2,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2 )

Initializes a new instance of the linear_gradient_brush class with the specified points and colors.

Parameters

point1	A xtd::drawing::point structure that represents the starting point of the linear gradient.
point2	A xtd::drawing::point structure that represents the endpoint of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [3/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::point_f &	point1,
		const xtd::drawing::point_f &	point2,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2 )

Initializes a new instance of the linear_gradient_brush class with the specified points and colors.

Parameters

point1	A xtd::drawing::point_f structure that represents the starting point of the linear gradient.
point2	A xtd::drawing::point_f structure that represents the endpoint of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [4/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2,
		xtd::drawing::drawing_2d::linear_gradient_mode	linear_gradient_mode )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.

Parameters

rect	A xtd::drawing::rectangle structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
linear_gradient_mode	A xtd::drawing::drawing_2d::linear_gradient_mode enumeration element that specifies the orientation of the gradient. The orientation determines the starting and ending points of the gradient. For example, xtd::drawing::drawing_2d::linear_gradient_mode::forward_diagonal specifies that the starting point is the upper-left corner of the rectangle and the ending point is the lower-right corner of the rectangle.

linear_gradient_brush() [5/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2,
		float	angle )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.

Parameters

rect	A xtd::drawing::rectangle structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
angle	The angle, measured in degrees clockwise from the x-axis, of the gradient's orientation line.

linear_gradient_brush() [6/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2,
		xtd::drawing::drawing_2d::linear_gradient_mode	linear_gradient_mode )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
linear_gradient_mode	A xtd::drawing::drawing_2d::linear_gradient_mode enumeration element that specifies the orientation of the gradient. The orientation determines the starting and ending points of the gradient. For example, xtd::drawing::drawing_2d::linear_gradient_mode::forward_diagonal specifies that the starting point is the upper-left corner of the rectangle and the ending point is the lower-right corner of the rectangle.

linear_gradient_brush() [7/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2,
		float	angle )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
angle	The angle, measured in degrees clockwise from the x-axis, of the gradient's orientation line.

linear_gradient_brush() [8/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2 )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [9/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::drawing::color &	color1,
		const xtd::drawing::color &	color2 )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [10/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::point &	point1,
		const xtd::drawing::point &	point2,
		const xtd::array< xtd::drawing::color > &	linear_colors )

Initializes a new instance of the linear_gradient_brush class with the specified points and colors.

Parameters

point1	A xtd::drawing::point structure that represents the starting point of the linear gradient.
point2	A xtd::drawing::point structure that represents the endpoint of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [11/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::point_f &	point1,
		const xtd::drawing::point_f &	point2,
		const xtd::array< xtd::drawing::color > &	linear_colors )

Initializes a new instance of the linear_gradient_brush class with the specified points and colors.

Parameters

point1	A xtd::drawing::point_f structure that represents the starting point of the linear gradient.
point2	A xtd::drawing::point_f structure that represents the endpoint of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [12/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors,
		xtd::drawing::drawing_2d::linear_gradient_mode	linear_gradient_mode )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.

Parameters

rect	A xtd::drawing::rectangle structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
linear_gradient_mode	A xtd::drawing::drawing_2d::linear_gradient_mode enumeration element that specifies the orientation of the gradient. The orientation determines the starting and ending points of the gradient. For example, xtd::drawing::drawing_2d::linear_gradient_mode::forward_diagonal specifies that the starting point is the upper-left corner of the rectangle and the ending point is the lower-right corner of the rectangle.

linear_gradient_brush() [13/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors,
		float	angle )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.

Parameters

rect	A xtd::drawing::rectangle structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
angle	The angle, measured in degrees clockwise from the x-axis, of the gradient's orientation line.

linear_gradient_brush() [14/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors,
		xtd::drawing::drawing_2d::linear_gradient_mode	linear_gradient_mode )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
linear_gradient_mode	A xtd::drawing::drawing_2d::linear_gradient_mode enumeration element that specifies the orientation of the gradient. The orientation determines the starting and ending points of the gradient. For example, xtd::drawing::drawing_2d::linear_gradient_mode::forward_diagonal specifies that the starting point is the upper-left corner of the rectangle and the ending point is the lower-right corner of the rectangle.

linear_gradient_brush() [15/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors,
		float	angle )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle, colors, and orientation angle.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.
angle	The angle, measured in degrees clockwise from the x-axis, of the gradient's orientation line.

linear_gradient_brush() [16/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

linear_gradient_brush() [17/17]

xtd::drawing::drawing_2d::linear_gradient_brush::linear_gradient_brush	(	const xtd::drawing::rectangle_f &	rect,
		const xtd::array< xtd::drawing::color > &	linear_colors )

Initializes a new instance of the linear_gradient_brush class with the specified rectangle and colors.

Parameters

rect	A xtd::drawing::rectangle_f structure that specifies the bounds of the linear gradient.
color1	A xtd::drawing::color structure that represents the starting color of the linear gradient.
color2	A xtd::drawing::color structure that represents the ending color of the linear gradient.

Member Function Documentation

angle() [1/2]

auto xtd::drawing::drawing_2d::linear_gradient_brush::angle ( ) const -> float

nodiscardnoexcept

Gets the angle of the gradient.

Returns

A float that specifies the angle of the linear gradient.

angle() [2/2]

auto xtd::drawing::drawing_2d::linear_gradient_brush::angle ( float value ) -> linear_gradient_brush &

noexcept

Sets the angle of the gradient.

Parameters

value

A float that specifies the angle of the linear gradient.

Returns

Current linear_gradient_brush instance.

linear_colors() [1/2]

auto xtd::drawing::drawing_2d::linear_gradient_brush::linear_colors ( ) const -> const xtd::drawing::drawing_2d::gradient_stop_collection &

nodiscardnoexcept

Gets the starting and ending colors of the gradient.

Returns

An array of two xtd::drawing::color structures that represents the starting and ending colors of the linear gradient.

linear_colors() [2/2]

auto xtd::drawing::drawing_2d::linear_gradient_brush::linear_colors

(

const xtd::drawing::drawing_2d::gradient_stop_collection &

value

)

-> linear_gradient_brush &

sets the starting and ending colors of the gradient.

Parameters

value

An array of two xtd::drawing::color structures that represents the starting and ending colors of the linear gradient.

Returns

Current linear_gradient_brush instance.

rectangle() [1/3]

auto xtd::drawing::drawing_2d::linear_gradient_brush::rectangle ( ) const -> const xtd::drawing::rectangle_f &

nodiscardnoexcept

Gets a rectangular region that defines the starting and ending points of the linear gradient.

Returns

A xtd::drawing::rectangle_f structure that specifies the starting and ending points of the linear gradient.

rectangle() [2/3]

auto xtd::drawing::drawing_2d::linear_gradient_brush::rectangle ( const xtd::drawing::rectangle_f & value ) -> linear_gradient_brush &

noexcept

Sets a rectangular region that defines the starting and ending points of the linear gradient.

Parameters

value

A xtd::drawing::rectangle_f structure that specifies the starting and ending points of the linear gradient.

Returns

Current linear_gradient_brush instance.

rectangle() [3/3]

auto xtd::drawing::drawing_2d::linear_gradient_brush::rectangle ( const xtd::drawing::rectangle & value ) -> linear_gradient_brush &

noexcept

Sets a rectangular region that defines the starting and ending points of the linear gradient.

Parameters

value

A xtd::drawing::rectangle_f structure that specifies the starting and ending points of the linear gradient.

Returns

Current linear_gradient_brush instance.

---

The documentation for this class was generated from the following file:

• xtd.drawing/include/xtd/drawing/drawing_2d/linear_gradient_brush.hpp