xtd::drawing::region Class Reference

Inheritance diagram for xtd::drawing::region:

Definition

Describes the interior of a graphics shape composed of rectangles and paths. This class cannot be inherited.

class drawing_export_ region final : public xtd::object

Inheritance

xtd::object → xtd::drawing::region

Namespace

xtd::drawing

Library

xtd.drawing

Remarks

A region is scalable because its coordinates are specified in world coordinates. On a drawing surface, however, its interior is dependent on the size and shape of the pixels representing it. An application can use regions to clip the output of drawing operations. These regions are called clipping regions. For more information on using regions for clipping,

An application can also use regions in hit-testing operations, such as checking whether a point or a rectangle intersects a region.

An application can fill a region by using the xtd::drawing::graphics::fill_region method and a xtd::drawing::brush object.

Examples

circular_form.cpp.

Public Constructors
	region ()
	Initializes a new xtd::drawing::region.
	region (const xtd::drawing::drawing_2d::graphics_path &path)
	Initializes a new xtd::drawing::region with the specified xtd::drawing::graphics_path.
	region (const xtd::drawing::rectangle &rect)
	Initializes a new xtd::drawing::region from the specified xtd::drawing::rectangle structure.
	region (const xtd::drawing::rectangle_f &rect)
	Initializes a new xtd::drawing::region from the specified xtd::drawing::rectangle_f structure.

Public Properties
intptr	handle () const noexcept
	Gets the handle of the region.

Public Methods
void	complement (const xtd::drawing::drawing_2d::graphics_path &path) noexcept
	Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::graphics_path that does not intersect with this xtd::drawing::region.
void	complement (const xtd::drawing::rectangle &rect) noexcept
	Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::rectangle structure that does not intersect with this xtd::drawing::region.
void	complement (const xtd::drawing::rectangle_f &rect) noexcept
	Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::rectangle_f structure that does not intersect with this xtd::drawing::region.
void	complement (const xtd::drawing::region &region) noexcept
	Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::region that does not intersect with this xtd::drawing::region.
bool	equals (const region &value) const noexcept override
void	exclude (const xtd::drawing::drawing_2d::graphics_path &path) noexcept
	Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::graphics_path.
void	exclude (const xtd::drawing::rectangle &rect) noexcept
	Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::rectangle structure.
void	exclude (const xtd::drawing::rectangle_f &rect) noexcept
	The xtd::drawing::rectangle_f structure to exclude from this xtd::drawing::region.
void	exclude (const xtd::drawing::region &region) noexcept
	Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::region.
xtd::drawing::rectangle_f	get_bounds () const noexcept
	Gets a xtd::drawing::rectangle_f structure that represents a rectangle that bounds this xtd::drawing::region on the drawing surface of a xtd::drawing::graphics object.
xtd::drawing::rectangle_f	get_bounds (const xtd::drawing::graphics &g) const noexcept
	Gets a xtd::drawing::rectangle_f structure that represents a rectangle that bounds this xtd::drawing::region on the drawing surface of a xtd::drawing::graphics object.
intptr	get_hrgn (const xtd::drawing::graphics &g) const noexcept
	Returns a Windows handle to this xtd::drawing::region in the specified graphics context.
void	intersect (const xtd::drawing::drawing_2d::graphics_path &path) noexcept
	Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::graphics_path.
void	intersect (const xtd::drawing::rectangle &rect) noexcept
	Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::rectangle structure.
void	intersect (const xtd::drawing::rectangle_f &rect) noexcept
	Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::rectangle_f structure.
void	intersect (const xtd::drawing::region &region) noexcept
	Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::region.
bool	is_empty () const noexcept
	Tests whether this xtd::drawing::region has an empty interior.
bool	is_empty (const xtd::drawing::graphics &g) const noexcept
	Tests whether this xtd::drawing::region has an empty interior on the specified drawing surface.
bool	is_infinite () const noexcept
	Tests whether this xtd::drawing::region has an infinite interior.
bool	is_infinite (const xtd::drawing::graphics &g) const noexcept
	Tests whether this xtd::drawing::region has an infinite interior on the specified drawing surface.
bool	is_visible (const xtd::drawing::rectangle_f &rect, const xtd::drawing::graphics &g) const noexcept
	Tests whether any portion of the specified xtd::drawing::rectangle_f structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (float x, float y, float width, float height, const xtd::drawing::graphics &g) const noexcept
	Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (const xtd::drawing::rectangle &rect, const xtd::drawing::graphics &g) const noexcept
	Tests whether any portion of the specified xtd::drawing::rectangle structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (int32 x, int32 y, int32 width, int32 height, const xtd::drawing::graphics &g) const noexcept
	Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (const xtd::drawing::rectangle_f &rect) const noexcept
	Tests whether any portion of the specified xtd::drawing::rectangle_f structure is contained within this xtd::drawing::region.
bool	is_visible (float x, float y, float width, float height) const noexcept
	Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region.
bool	is_visible (const xtd::drawing::rectangle &rect) const noexcept
	Tests whether any portion of the specified xtd::drawing::rectangle structure is contained within this xtd::drawing::region.
bool	is_visible (int32 x, int32 y, int32 width, int32 height) const noexcept
	Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region.
bool	is_visible (xtd::drawing::point_f pt, const xtd::drawing::graphics &g) const noexcept
	Tests whether the specified PointF structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (float x, float y, const xtd::drawing::graphics &g) const noexcept
	Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (xtd::drawing::point pt, const xtd::drawing::graphics &g) const noexcept
	Tests whether the specified Point structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (int32 x, int32 y, const xtd::drawing::graphics &g) const noexcept
	Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (xtd::drawing::point_f pt) const noexcept
	Tests whether the specified PointF structure is contained within this xtd::drawing::region.
bool	is_visible (float x, float y) const noexcept
	Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
bool	is_visible (xtd::drawing::point pt) const noexcept
	Tests whether the specified Point structure is contained within this xtd::drawing::region.
bool	is_visible (int32 x, int32 y) const noexcept
	Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.
void	make_empty ()
	Initializes this xtd::drawing::region to an empty interior.
void	make_infinite () noexcept
	Initializes this xtd::drawing::region object to an infinite interior.
void	make_union (const xtd::drawing::drawing_2d::graphics_path &path) noexcept
	Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::graphics_path.
void	make_union (const xtd::drawing::rectangle &rect) noexcept
	Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::rectangle structure.
void	make_union (const xtd::drawing::rectangle_f &rect) noexcept
	Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::rectangle_f structure.
void	make_union (const xtd::drawing::region &region) noexcept
	Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::region.
void	make_xor (const xtd::drawing::drawing_2d::graphics_path &path) noexcept
	Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::graphics_path.
void	make_xor (const xtd::drawing::rectangle &rect) noexcept
	Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::rectangle structure.
void	make_xor (const xtd::drawing::rectangle_f &rect) noexcept
	Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::rectangle_f structure.
void	make_xor (const xtd::drawing::region &region) noexcept
	Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::region.
void	release_hrgn (intptr region_handle)
	Releases the handle of the xtd::drawing::region.
void	translate (int32 dx, int32 dy) noexcept
	Offsets the coordinates of this xtd::drawing::region by the specified amount.
void	translate (float dx, float dy) noexcept
	Offsets the coordinates of this xtd::drawing::region by the specified amount.
virtual bool	equals (const object &obj) const noexcept
	Determines whether the specified object is equal to the current object.
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.

Public Static Methods
static xtd::drawing::region	from_hrgn (intptr hrgn)
	Initializes a new xtd::drawing::region from a handle to the specified existing GDI region.

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object.
virtual size_t	get_hash_code () const noexcept
	Serves as a hash function for a particular type.
virtual type_object	get_type () const noexcept
	Gets the type of the current instance.
template<typename object_t >
xtd::uptr< object_t >	memberwise_clone () const
	Creates a shallow copy of the current object.
virtual xtd::string	to_string () const noexcept
	Returns a xtd::string that represents the current object.
Public Member Functions inherited from xtd::iequatable< region >
virtual bool	equals (const region &) const noexcept=0
	Indicates whether the current object is equal to another object of the same type.
Static Public Member Functions inherited from xtd::object
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.
template<typename object_a_t , typename object_b_t >
static bool	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are the same instance.

Constructor & Destructor Documentation

region() [1/4]

xtd::drawing::region::region

(

)

Initializes a new xtd::drawing::region.

Remarks

This constructor initializes a new xtd::drawing::region with an infinite interior.

region() [2/4]

xtd::drawing::region::region ( const xtd::drawing::drawing_2d::graphics_path &  path )

explicit

Initializes a new xtd::drawing::region with the specified xtd::drawing::graphics_path.

Parameters

path	A xtd::drawing::graphics_path that defines the new xtd::drawing::region.

Remarks

This method creates a new xtd::drawing::region with a xtd::drawing::graphics_path. The new region is defined as the interior of the xtd::drawing::graphics_path specified by the path parameter.

region() [3/4]

xtd::drawing::region::region ( const xtd::drawing::rectangle &  rect )

explicit

Initializes a new xtd::drawing::region from the specified xtd::drawing::rectangle structure.

Parameters

rect	A xtd::drawing::rectangle structure that defines the interior of the new xtd::drawing::region.

Remarks

This method creates a new xtd::drawing::region with a rectangular interior. The interior is defined by the rect parameter.

region() [4/4]

xtd::drawing::region::region ( const xtd::drawing::rectangle_f &  rect )

explicit

Initializes a new xtd::drawing::region from the specified xtd::drawing::rectangle_f structure.

Parameters

rect	A xtd::drawing::rectangle_f structure that defines the interior of the new xtd::drawing::region.

Remarks

This method creates a new xtd::drawing::region with a rectangular interior. The interior is defined by the rect parameter.

Member Function Documentation

handle()

intptr xtd::drawing::region::handle ( ) const

noexcept

Gets the handle of the region.

Returns

An intptr that contains the handle of the region.

complement() [1/4]

void xtd::drawing::region::complement ( const xtd::drawing::drawing_2d::graphics_path &  path )

noexcept

Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::graphics_path that does not intersect with this xtd::drawing::region.

Parameters

path	The xtd::drawing::graphics_path to complement this xtd::drawing::region.

complement() [2/4]

void xtd::drawing::region::complement ( const xtd::drawing::rectangle &  rect )

noexcept

Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::rectangle structure that does not intersect with this xtd::drawing::region.

Parameters

rect	The xtd::drawing::rectangle structure to complement this xtd::drawing::region.

complement() [3/4]

void xtd::drawing::region::complement ( const xtd::drawing::rectangle_f &  rect )

noexcept

Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::rectangle_f structure that does not intersect with this xtd::drawing::region.

Parameters

rect	The xtd::drawing::rectangle_f structure to complement this xtd::drawing::region.

complement() [4/4]

void xtd::drawing::region::complement ( const xtd::drawing::region &  region )

noexcept

Updates this xtd::drawing::region to contain the portion of the specified xtd::drawing::region that does not intersect with this xtd::drawing::region.

Parameters

region

The xtd::drawing::region object to complement this xtd::drawing::region object.

exclude() [1/4]

void xtd::drawing::region::exclude ( const xtd::drawing::drawing_2d::graphics_path &  path )

noexcept

Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::graphics_path.

Parameters

path	The xtd::drawing::graphics_path to exclude from this xtd::drawing::region.

exclude() [2/4]

void xtd::drawing::region::exclude ( const xtd::drawing::rectangle &  rect )

noexcept

Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::rectangle structure.

Parameters

rect	The xtd::drawing::rectangle structure to exclude from this xtd::drawing::region.

exclude() [3/4]

void xtd::drawing::region::exclude ( const xtd::drawing::rectangle_f &  rect )

noexcept

The xtd::drawing::rectangle_f structure to exclude from this xtd::drawing::region.

exclude() [4/4]

void xtd::drawing::region::exclude ( const xtd::drawing::region &  region )

noexcept

Updates this xtd::drawing::region to contain only the portion of its interior that does not intersect with the specified xtd::drawing::region.

Parameters

region

The xtd::drawing::region to exclude from this xtd::drawing::region.

get_bounds() [1/2]

xtd::drawing::rectangle_f xtd::drawing::region::get_bounds ( ) const

noexcept

Gets a xtd::drawing::rectangle_f structure that represents a rectangle that bounds this xtd::drawing::region on the drawing surface of a xtd::drawing::graphics object.

Parameters

g	The xtd::drawing::graphics on which this xtd::drawing::region is drawn.

Returns

A xtd::drawing::rectangle_f structure that represents the bounding rectangle for this xtd::drawing::region in pixels.

Remarks

The current transformation of the graphics context is used to compute the region interior on the drawing surface. The bounding rectangle is not always the smallest possible bounding rectangle depending on the current transformation.

get_bounds() [2/2]

xtd::drawing::rectangle_f xtd::drawing::region::get_bounds ( const xtd::drawing::graphics &  g ) const

noexcept

Gets a xtd::drawing::rectangle_f structure that represents a rectangle that bounds this xtd::drawing::region on the drawing surface of a xtd::drawing::graphics object.

Parameters

g	The xtd::drawing::graphics on which this xtd::drawing::region is drawn.

Returns

A xtd::drawing::rectangle_f structure that represents the bounding rectangle for this xtd::drawing::region on the specified drawing surface.

Remarks

The current transformation of the graphics context is used to compute the region interior on the drawing surface. The bounding rectangle is not always the smallest possible bounding rectangle depending on the current transformation.

get_hrgn()

intptr xtd::drawing::region::get_hrgn ( const xtd::drawing::graphics &  g ) const

noexcept

Returns a Windows handle to this xtd::drawing::region in the specified graphics context.

Parameters

g	The xtd::drawing::graphics on which this xtd::drawing::region is drawn.

Returns

A Windows handle to this xtd::drawing::region.

Remarks

You are responsible for calling the xtd::region::release_hrgn method to free the memory used by the GDI region object.

intersect() [1/4]

void xtd::drawing::region::intersect ( const xtd::drawing::drawing_2d::graphics_path &  path )

noexcept

Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::graphics_path.

Parameters

path	The xtd::drawing::graphics_path to intersect with this xtd::drawing::region.

intersect() [2/4]

void xtd::drawing::region::intersect ( const xtd::drawing::rectangle &  rect )

noexcept

Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::rectangle structure.

Parameters

The	xtd::drawing::rectangle structure to intersect with this xtd::drawing::region.

intersect() [3/4]

void xtd::drawing::region::intersect ( const xtd::drawing::rectangle_f &  rect )

noexcept

Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::rectangle_f structure.

Parameters

rect	The xtd::drawing::rectangle_f structure to intersect with this xtd::drawing::region.

intersect() [4/4]

void xtd::drawing::region::intersect ( const xtd::drawing::region &  region )

noexcept

Updates this xtd::drawing::region to the intersection of itself with the specified xtd::drawing::region.

Parameters

region

The xtd::drawing::region to intersect with this xtd::drawing::region.

is_empty() [1/2]

bool xtd::drawing::region::is_empty ( ) const

noexcept

Tests whether this xtd::drawing::region has an empty interior.

Returns

true if the interior of this xtd::drawing::region is empty; otherwise, false.

Remarks

The current transformation of the graphics context g is used to compute the region interior on the drawing surface.

is_empty() [2/2]

bool xtd::drawing::region::is_empty ( const xtd::drawing::graphics &  g ) const

noexcept

Tests whether this xtd::drawing::region has an empty interior on the specified drawing surface.

Parameters

g	A xtd::drawing::graphics that represents a drawing surface.

Returns

true if the interior of this xtd::drawing::region is empty when the transformation associated with g is applied; otherwise, false.

Remarks

The current transformation of the graphics context g is used to compute the region interior on the drawing surface.

is_infinite() [1/2]

bool xtd::drawing::region::is_infinite ( ) const

noexcept

Tests whether this xtd::drawing::region has an infinite interior.

Returns

true if the interior of this xtd::drawing::region is infinite; otherwise, false.

Remarks

The current transformation of the graphics context g is used to compute the region interior on the drawing surface.

is_infinite() [2/2]

bool xtd::drawing::region::is_infinite ( const xtd::drawing::graphics &  g ) const

noexcept

Tests whether this xtd::drawing::region has an infinite interior on the specified drawing surface.

Parameters

g	A xtd::drawing::graphics that represents a drawing surface.

Returns

true if the interior of this xtd::drawing::region is infinite when the transformation associated with g is applied; otherwise, false.

Remarks

The current transformation of the graphics context g is used to compute the region interior on the drawing surface.

is_visible() [1/16]

bool xtd::drawing::region::is_visible ( const xtd::drawing::rectangle_f &  rect, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether any portion of the specified xtd::drawing::rectangle_f structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

rect	The xtd::drawing::rectangle_f structure to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when any portion of the rect is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [2/16]

bool xtd::drawing::region::is_visible ( float  x, float  y, float  width, float  height, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the upper-left corner of the rectangle to test.
y	The y-coordinate of the upper-left corner of the rectangle to test.
width	The width of the rectangle to test.
height	The height of the rectangle to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when any portion of the specified rectangle is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [3/16]

bool xtd::drawing::region::is_visible ( const xtd::drawing::rectangle &  rect, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether any portion of the specified xtd::drawing::rectangle structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

rect	The xtd::drawing::rectangle structure to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when any portion of the rect is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [4/16]

bool xtd::drawing::region::is_visible ( int32  x, int32  y, int32  width, int32  height, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the upper-left corner of the rectangle to test.
y	The y-coordinate of the upper-left corner of the rectangle to test.
width	The width of the rectangle to test.
height	The height of the rectangle to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when any portion of the specified rectangle is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [5/16]

bool xtd::drawing::region::is_visible ( const xtd::drawing::rectangle_f &  rect ) const

noexcept

Tests whether any portion of the specified xtd::drawing::rectangle_f structure is contained within this xtd::drawing::region.

Parameters

rect	The xtd::drawing::rectangle_f structure to test.

Returns

true when any portion of rect is contained within this xtd::drawing::region; otherwise, false.

is_visible() [6/16]

bool xtd::drawing::region::is_visible ( float  x, float  y, float  width, float  height  ) const

noexcept

Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region.

Parameters

x	The x-coordinate of the upper-left corner of the rectangle to test.
y	The y-coordinate of the upper-left corner of the rectangle to test.
width	The width of the rectangle to test.
height	The height of the rectangle to test.

Returns

true when any portion of the specified rectangle is contained within this xtd::drawing::region; otherwise, false.

is_visible() [7/16]

bool xtd::drawing::region::is_visible ( const xtd::drawing::rectangle &  rect ) const

noexcept

Tests whether any portion of the specified xtd::drawing::rectangle structure is contained within this xtd::drawing::region.

Parameters

rect	The xtd::drawing::rectangle structure to test.

Returns

true when any portion of rect is contained within this xtd::drawing::region; otherwise, false.

is_visible() [8/16]

bool xtd::drawing::region::is_visible ( int32  x, int32  y, int32  width, int32  height  ) const

noexcept

Tests whether any portion of the specified rectangle is contained within this xtd::drawing::region.

Parameters

x	The x-coordinate of the upper-left corner of the rectangle to test.
y	The y-coordinate of the upper-left corner of the rectangle to test.
width	The width of the rectangle to test.
height	The height of the rectangle to test.

Returns

true when any portion of the specified rectangle is contained within this xtd::drawing::region; otherwise, false.

is_visible() [9/16]

bool xtd::drawing::region::is_visible ( xtd::drawing::point_f  pt, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether the specified PointF structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

pt	The PointF structure to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when point is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [10/16]

bool xtd::drawing::region::is_visible ( float  x, float  y, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the point to test.
y	The y-coordinate of the point to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when the specified point is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [11/16]

bool xtd::drawing::region::is_visible ( xtd::drawing::point  pt, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether the specified Point structure is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

pt	The Point structure to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when point is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [12/16]

bool xtd::drawing::region::is_visible ( int32  x, int32  y, const xtd::drawing::graphics &  g  ) const

noexcept

Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the point to test.
y	The y-coordinate of the point to test.
g	A xtd::drawing::graphics that represents a graphics context.

Returns

true when the specified point is contained within this xtd::drawing::region; otherwise, false.

Remarks

The current transformation of the graphics context is used to compute the region interior and the rectangle coordinates on the drawing surface.

is_visible() [13/16]

bool xtd::drawing::region::is_visible ( xtd::drawing::point_f  pt ) const

noexcept

Tests whether the specified PointF structure is contained within this xtd::drawing::region.

Parameters

pt	The PointF structure to test.

Returns

true when point is contained within this xtd::drawing::region; otherwise, false.

is_visible() [14/16]

bool xtd::drawing::region::is_visible ( float  x, float  y  ) const

noexcept

Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the point to test.
y	The y-coordinate of the point to test.

Returns

true when the specified point is contained within this xtd::drawing::region; otherwise, false.

is_visible() [15/16]

bool xtd::drawing::region::is_visible ( xtd::drawing::point  pt ) const

noexcept

Tests whether the specified Point structure is contained within this xtd::drawing::region.

Parameters

pt	The Point structure to test.

Returns

true when point is contained within this xtd::drawing::region; otherwise, false.

is_visible() [16/16]

bool xtd::drawing::region::is_visible ( int32  x, int32  y  ) const

noexcept

Tests whether the specified point is contained within this xtd::drawing::region when drawn using the specified xtd::drawing::graphics.

Parameters

x	The x-coordinate of the point to test.
y	The y-coordinate of the point to test.

Returns

true when the specified point is contained within this xtd::drawing::region; otherwise, false.

make_empty()

void xtd::drawing::region::make_empty

(

)

Initializes this xtd::drawing::region to an empty interior.

make_infinite()

void xtd::drawing::region::make_infinite ( )

noexcept

Initializes this xtd::drawing::region object to an infinite interior.

make_union() [1/4]

void xtd::drawing::region::make_union ( const xtd::drawing::drawing_2d::graphics_path &  path )

noexcept

Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::graphics_path.

Parameters

path	The xtd::drawing::graphics_path to unite with this xtd::drawing::region.

make_union() [2/4]

void xtd::drawing::region::make_union ( const xtd::drawing::rectangle &  rect )

noexcept

Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::rectangle structure.

Parameters

rect	The xtd::drawing::rectangle structure to unite with this xtd::drawing::region.

make_union() [3/4]

void xtd::drawing::region::make_union ( const xtd::drawing::rectangle_f &  rect )

noexcept

Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::rectangle_f structure.

Parameters

rect	The xtd::drawing::rectangle_f structure to unite with this xtd::drawing::region.

make_union() [4/4]

void xtd::drawing::region::make_union ( const xtd::drawing::region &  region )

noexcept

Updates this xtd::drawing::region to the union of itself and the specified xtd::drawing::region.

Parameters

region

The xtd::drawing::region to unite with this xtd::drawing::region.

make_xor() [1/4]

void xtd::drawing::region::make_xor ( const xtd::drawing::drawing_2d::graphics_path &  path )

noexcept

Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::graphics_path.

Parameters

path	The xtd::drawing::graphics_path to Xor with this xtd::drawing::region.

make_xor() [2/4]

void xtd::drawing::region::make_xor ( const xtd::drawing::rectangle &  rect )

noexcept

Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::rectangle structure.

Parameters

path	The xtd::drawing::rectangle structure to Xor with this xtd::drawing::region.

make_xor() [3/4]

void xtd::drawing::region::make_xor ( const xtd::drawing::rectangle_f &  rect )

noexcept

Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::rectangle_f structure.

Parameters

path	The xtd::drawing::rectangle_f structure to Xor with this xtd::drawing::region.

make_xor() [4/4]

void xtd::drawing::region::make_xor ( const xtd::drawing::region &  region )

noexcept

Updates this xtd::drawing::region to the union minus the intersection of itself with the specified xtd::drawing::region.

Parameters

path	The xtd::drawing::region to Xor with this xtd::drawing::region.

release_hrgn()

void xtd::drawing::region::release_hrgn

(

intptr

region_handle

)

Releases the handle of the xtd::drawing::region.

Parameters

region_handle

The handle to the xtd::drawing::region.

translate() [1/2]

void xtd::drawing::region::translate ( int32  dx, int32  dy  )

noexcept

Offsets the coordinates of this xtd::drawing::region by the specified amount.

Parameters

dx	The amount to offset this xtd::drawing::region horizontally.
dy	The amount to offset this xtd::drawing::region vertically.

translate() [2/2]

void xtd::drawing::region::translate ( float  dx, float  dy  )

noexcept

Offsets the coordinates of this xtd::drawing::region by the specified amount.

Parameters

dx	The amount to offset this xtd::drawing::region horizontally.
dy	The amount to offset this xtd::drawing::region vertically.

from_hrgn()

static xtd::drawing::region xtd::drawing::region::from_hrgn ( intptr  hrgn )

static

Initializes a new xtd::drawing::region from a handle to the specified existing GDI region.

Parameters

hrgn	A handle to an existing xtd::drawing::region.

Returns

The new xtd::drawing::region.

Remarks

This method creates a new xtd::drawing::region with an interior defined by the existing xtd::drawing::region referred to by the handle in the hrgn parameter.

equals() [1/2]

virtual bool xtd::object::equals ( const object &  obj ) const

virtualnoexcept

Determines whether the specified object is equal to the current object.

Parameters

obj	The object to compare with the current object.

Returns

true if the specified object is equal to the current object. otherwise, false.

Examples

The following code example compares the current instance with another object.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  auto object1 = new_ptr<object>();
  auto object2 = new_ptr<object>();
  
  auto object3 = object2;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
  object3 = object1;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
}
 
// This code produces the following output :
//
// false
// false
// true
// true

Reimplemented from xtd::object.

equals() [2/2]

template<typename object_a_t , typename object_b_t >

static bool xtd::object::equals ( const object_a_t &  object_a, const object_b_t &  object_b  )

inlinestaticnoexcept

Determines whether the specified object instances are considered equal.

Parameters

object_a	The first object to compare.
object_b	The second object to compare.

Returns

true if object_a is the same instance as object_b or if both are null references or if object_a(object_b) returns true. otherwise, false.

Examples

The following code example compares different objects.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  string s1 = "Tom";
  string s2 = "Carol";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Tom";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Carol";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
}
 
// This code produces the following output :
//
// object::equals("Tom", "Carol") => false
// object::equals("Tom", "Tom") => true
// object::equals("", "Tom") => false
// object::equals("Carol", "") => false
// object::equals("", "") => true

---

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

• xtd.drawing/include/xtd/drawing/region.h