Maintains a set of rectangles as a complex region. More...

Public Types
typedef Rectangle< ValueType >	RectangleType

Public Member Functions
	RectangleList () noexcept
	Creates an empty RectangleList. More...

	RectangleList (const RectangleList &other)
	Creates a copy of another list. More...

	RectangleList (const RectangleType &rect)
	Creates a list containing just one rectangle. More...

RectangleList &	operator= (const RectangleList &other)
	Copies this list from another one. More...

	RectangleList (RectangleList &&other) noexcept

RectangleList &	operator= (RectangleList &&other) noexcept

bool	isEmpty () const noexcept
	Returns true if the region is empty. More...

int	getNumRectangles () const noexcept
	Returns the number of rectangles in the list. More...

RectangleType	getRectangle (int index) const noexcept
	Returns one of the rectangles at a particular index. More...

void	clear ()
	Removes all rectangles to leave an empty region. More...

void	add (const RectangleType &rect)
	Merges a new rectangle into the list. More...

void	add (ValueType x, ValueType y, ValueType width, ValueType height)
	Merges a new rectangle into the list. More...

void	addWithoutMerging (const RectangleType &rect)
	Dumbly adds a rectangle to the list without checking for overlaps. More...

void	add (const RectangleList &other)
	Merges another rectangle list into this one. More...

void	subtract (const RectangleType &rect)
	Removes a rectangular region from the list. More...

bool	subtract (const RectangleList &otherList)
	Removes all areas in another RectangleList from this one. More...

bool	clipTo (const RectangleType &rect)
	Removes any areas of the region that lie outside a given rectangle. More...

template<typename OtherValueType >
bool	clipTo (const RectangleList< OtherValueType > &other)
	Removes any areas of the region that lie outside a given rectangle list. More...

bool	getIntersectionWith (const RectangleType &rect, RectangleList &destRegion) const
	Creates a region which is the result of clipping this one to a given rectangle. More...

void	swapWith (RectangleList &otherList) noexcept
	Swaps the contents of this and another list. More...

bool	containsPoint (Point< ValueType > point) const noexcept
	Checks whether the region contains a given point. More...

bool	containsPoint (ValueType x, ValueType y) const noexcept
	Checks whether the region contains a given point. More...

bool	containsRectangle (const RectangleType &rectangleToCheck) const
	Checks whether the region contains the whole of a given rectangle. More...

bool	intersectsRectangle (const RectangleType &rectangleToCheck) const noexcept
	Checks whether the region contains any part of a given rectangle. More...

bool	intersects (const RectangleList &other) const noexcept
	Checks whether this region intersects any part of another one. More...

RectangleType	getBounds () const noexcept
	Returns the smallest rectangle that can enclose the whole of this region. More...

void	consolidate ()
	Optimises the list into a minimum number of constituent rectangles. More...

void	offsetAll (Point< ValueType > offset) noexcept
	Adds an x and y value to all the coordinates. More...

void	offsetAll (ValueType dx, ValueType dy) noexcept
	Adds an x and y value to all the coordinates. More...

template<typename ScaleType >
void	scaleAll (ScaleType scaleFactor) noexcept
	Scales all the coordinates. More...

void	transformAll (const AffineTransform &transform) noexcept
	Applies a transform to all the rectangles. More...

Path	toPath () const
	Creates a Path object to represent this region. More...

const RectangleType *	begin () const noexcept
	Standard method for iterating the rectangles in the list. More...

const RectangleType *	end () const noexcept
	Standard method for iterating the rectangles in the list. More...

void	ensureStorageAllocated (int minNumRectangles)
	Increases the internal storage to hold a minimum number of rectangles. More...

Detailed Description

template<typename ValueType>
class RectangleList< ValueType >

Maintains a set of rectangles as a complex region.

This class allows a set of rectangles to be treated as a solid shape, and can add and remove rectangular sections of it, and simplify overlapping or adjacent rectangles.

See also: Rectangle

Member Typedef Documentation

template<typename ValueType>

typedef Rectangle<ValueType> RectangleList< ValueType >::RectangleType

Constructor & Destructor Documentation

template<typename ValueType>

RectangleList< ValueType >::RectangleList ( )

noexcept

Creates an empty RectangleList.

template<typename ValueType>

RectangleList< ValueType >::RectangleList ( const RectangleList< ValueType > & other )

Creates a copy of another list.

template<typename ValueType>

RectangleList< ValueType >::RectangleList ( const RectangleType & rect )

Creates a list containing just one rectangle.

template<typename ValueType>

RectangleList< ValueType >::RectangleList ( RectangleList< ValueType > && other )

noexcept

Member Function Documentation

template<typename ValueType>

RectangleList& RectangleList< ValueType >::operator= ( const RectangleList< ValueType > & other )

Copies this list from another one.

template<typename ValueType>

RectangleList& RectangleList< ValueType >::operator= ( RectangleList< ValueType > && other )

noexcept

template<typename ValueType>

bool RectangleList< ValueType >::isEmpty ( ) const

noexcept

Returns true if the region is empty.

Referenced by RectangleList< int >::clipTo().

template<typename ValueType>

int RectangleList< ValueType >::getNumRectangles ( ) const

noexcept

Returns the number of rectangles in the list.

Referenced by RectangleList< int >::subtract().

template<typename ValueType>

RectangleType RectangleList< ValueType >::getRectangle ( int index ) const

noexcept

Returns one of the rectangles at a particular index.

Returns: the rectangle at the index, or an empty rectangle if the index is out-of-range.

template<typename ValueType>

void RectangleList< ValueType >::clear ( )

Removes all rectangles to leave an empty region.

Referenced by RectangleList< int >::clipTo(), and RectangleList< int >::getIntersectionWith().

template<typename ValueType>

void RectangleList< ValueType >::add ( const RectangleType & rect )

Merges a new rectangle into the list.

The rectangle being added will first be clipped to remove any parts of it that overlap existing rectangles in the list, and adjacent rectangles will be merged into it.

The rectangle can have any size and may be empty, but if it's floating point then it's expected to not contain any INF values.

Referenced by RectangleList< int >::add().

template<typename ValueType>

void RectangleList< ValueType >::add	(	ValueType	x,
		ValueType	y,
		ValueType	width,
		ValueType	height
	)

Merges a new rectangle into the list.

The rectangle being added will first be clipped to remove any parts of it that overlap existing rectangles in the list.

template<typename ValueType>

void RectangleList< ValueType >::addWithoutMerging ( const RectangleType & rect )

Dumbly adds a rectangle to the list without checking for overlaps.

This simply adds the rectangle to the end, it doesn't merge it or remove any overlapping bits.

The rectangle can have any size and may be empty, but if it's floating point then it's expected to not contain any INF values.

Referenced by RectangleList< int >::RectangleList().

template<typename ValueType>

void RectangleList< ValueType >::add ( const RectangleList< ValueType > & other )

Merges another rectangle list into this one.

Any overlaps between the two lists will be clipped, so that the result is the union of both lists.

template<typename ValueType>

void RectangleList< ValueType >::subtract ( const RectangleType & rect )

Removes a rectangular region from the list.

Any rectangles in the list which overlap this will be clipped and subdivided if necessary.

Referenced by RectangleList< int >::add(), RectangleList< int >::containsRectangle(), and RectangleList< int >::subtract().

template<typename ValueType>

bool RectangleList< ValueType >::subtract ( const RectangleList< ValueType > & otherList )

Removes all areas in another RectangleList from this one.

Any rectangles in the list which overlap this will be clipped and subdivided if necessary.

Returns: true if the resulting list is non-empty.

template<typename ValueType>

bool RectangleList< ValueType >::clipTo ( const RectangleType & rect )

Removes any areas of the region that lie outside a given rectangle.

Any rectangles in the list which overlap this will be clipped and subdivided if necessary.

Returns true if the resulting region is not empty, false if it is empty.

See also: getIntersectionWith

template<typename ValueType>

template<typename OtherValueType >

bool RectangleList< ValueType >::clipTo ( const RectangleList< OtherValueType > & other )

Removes any areas of the region that lie outside a given rectangle list.

Any rectangles in this object which overlap the specified list will be clipped and subdivided if necessary.

Returns true if the resulting region is not empty, false if it is empty.

See also: getIntersectionWith

template<typename ValueType>

bool RectangleList< ValueType >::getIntersectionWith	(	const RectangleType &	rect,
		RectangleList< ValueType > &	destRegion
	)		const

Creates a region which is the result of clipping this one to a given rectangle.

Unlike the other clipTo method, this one doesn't affect this object - it puts the resulting region into the list whose reference is passed-in.

Returns true if the resulting region is not empty, false if it is empty.

See also: clipTo

template<typename ValueType>

void RectangleList< ValueType >::swapWith ( RectangleList< ValueType > & otherList )

noexcept

Swaps the contents of this and another list.

This swaps their internal pointers, so is hugely faster than using copy-by-value to swap them.

Referenced by RectangleList< int >::clipTo().

template<typename ValueType>

bool RectangleList< ValueType >::containsPoint ( Point< ValueType > point ) const

noexcept

Checks whether the region contains a given point.

Returns: true if the point lies within one of the rectangles in the list

Referenced by RectangleList< int >::containsPoint().

template<typename ValueType>

bool RectangleList< ValueType >::containsPoint	(	ValueType	x,
		ValueType	y
	)		const

noexcept

Checks whether the region contains a given point.

Returns: true if the point lies within one of the rectangles in the list

template<typename ValueType>

bool RectangleList< ValueType >::containsRectangle ( const RectangleType & rectangleToCheck ) const

Checks whether the region contains the whole of a given rectangle.

Returns: true all parts of the rectangle passed in lie within the region defined by this object

See also: intersectsRectangle, containsPoint

template<typename ValueType>

bool RectangleList< ValueType >::intersectsRectangle ( const RectangleType & rectangleToCheck ) const

noexcept

Checks whether the region contains any part of a given rectangle.

Returns: true if any part of the rectangle passed in lies within the region defined by this object

See also: containsRectangle

template<typename ValueType>

bool RectangleList< ValueType >::intersects ( const RectangleList< ValueType > & other ) const

noexcept

Checks whether this region intersects any part of another one.

See also: intersectsRectangle

template<typename ValueType>

RectangleType RectangleList< ValueType >::getBounds ( ) const

noexcept

Returns the smallest rectangle that can enclose the whole of this region.

template<typename ValueType>

void RectangleList< ValueType >::consolidate ( )

Optimises the list into a minimum number of constituent rectangles.

This will try to combine any adjacent rectangles into larger ones where possible, to simplify lists that might have been fragmented by repeated add/subtract calls.

template<typename ValueType>

void RectangleList< ValueType >::offsetAll ( Point< ValueType > offset )

noexcept

Adds an x and y value to all the coordinates.

Referenced by RectangleList< int >::offsetAll().

template<typename ValueType>

void RectangleList< ValueType >::offsetAll	(	ValueType	dx,
		ValueType	dy
	)

noexcept

Adds an x and y value to all the coordinates.

template<typename ValueType>

template<typename ScaleType >

void RectangleList< ValueType >::scaleAll ( ScaleType scaleFactor )

noexcept

Scales all the coordinates.

template<typename ValueType>

void RectangleList< ValueType >::transformAll ( const AffineTransform & transform )

noexcept

Applies a transform to all the rectangles.

Obviously this will create a mess if the transform involves any rotation or skewing.

template<typename ValueType>

Path RectangleList< ValueType >::toPath ( ) const

Creates a Path object to represent this region.

template<typename ValueType>

const RectangleType* RectangleList< ValueType >::begin ( ) const

noexcept

Standard method for iterating the rectangles in the list.

Referenced by RectangleList< int >::add(), and RectangleList< int >::clipTo().

template<typename ValueType>

const RectangleType* RectangleList< ValueType >::end ( ) const

noexcept

Standard method for iterating the rectangles in the list.

Referenced by RectangleList< int >::add(), and RectangleList< int >::clipTo().

template<typename ValueType>

void RectangleList< ValueType >::ensureStorageAllocated ( int minNumRectangles )

Increases the internal storage to hold a minimum number of rectangles.

Calling this before adding a large number of rectangles means that the array won't have to keep dynamically resizing itself as the elements are added, and it'll therefore be more efficient.

See also: Array::ensureStorageAllocated

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

juce_RectangleList.h

Public Types

Public Member Functions

Detailed Description

template<typename ValueType> class RectangleList< ValueType >

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

template<typename ValueType>
class RectangleList< ValueType >