A pie chart. More...

#import <CPTPieChart.h>

Inheritance diagram for CPTPieChart:

Collaboration diagram for CPTPieChart:

Public Class Methods
Factory Methods
(nonnull CPTColor *)	+ defaultPieSliceColorForIndex:
	Creates and returns a CPTColor that acts as the default color for that pie chart index. More...

Public Class Methods inherited from CPTPlot
(nonnull id)	+ nilData
	A unique marker object used in collections to indicate that the datasource returned nil. More...

Public Class Methods inherited from CALayer
(id)	+ layer

Public Class Methods inherited from NSObject
(id)	+ alloc

(Class)	+ class

(void)	+ initialize

(void)	+ load

(id)	+ new

Public Class Methods inherited from <NSSecureCoding>
(BOOL)	+ supportsSecureCoding:

Public Instance Methods
Slice Style
(void)	- reloadSliceFills
	Reload all slice fills from the data source immediately. More...

(void)	- reloadSliceFillsInIndexRange:
	Reload slice fills in the given index range from the data source immediately. More...

Slice Layout
(void)	- reloadRadialOffsets
	Reload all slice offsets from the data source immediately. More...

(void)	- reloadRadialOffsetsInIndexRange:
	Reload slice offsets in the given index range from the data source immediately. More...

Information
(NSUInteger)	- pieSliceIndexAtAngle:
	Searches the pie slices for one corresponding to the given angle. More...

(CGFloat)	- medianAngleForPieSliceIndex:
	Computes the halfway-point between the starting and ending angles of a given pie slice. More...

Initialization
(nonnull instancetype)	- initWithFrame: `[implementation]`
	Initializes a newly allocated CPTPieChart object with the provided frame rectangle. More...

User Interaction
(BOOL)	- pointingDeviceDownEvent:atPoint: `[implementation]`
	Informs the receiver that the user has started touching the screen. More...

(BOOL)	- pointingDeviceUpEvent:atPoint: `[implementation]`
	Informs the receiver that the user has ended touching the screen. More...

Public Instance Methods inherited from CPTPlot
(void)	- reloadPlotDataInIndexRange: `[implementation]`
	Reload plot data in the given index range from the data source immediately. More...

(nullable NSString *)	- titleForLegendEntryAtIndex: `[implementation]`
	The title text of a legend entry. More...

(nullable NSAttributedString *)	- attributedTitleForLegendEntryAtIndex: `[implementation]`
	The styled title text of a legend entry. More...

(nonnull CPTNumberArray *)	- fieldIdentifiersForCoordinate: `[implementation]`
	The field identifiers that correspond to a particular coordinate. More...

(CPTCoordinate)	- coordinateForFieldIdentifier: `[implementation]`
	The coordinate value that corresponds to a particular field identifier. More...

(void)	- positionLabelAnnotation:forIndex: `[implementation]`
	Adjusts the position of the data label annotation for the plot point at the given index. More...

(NSUInteger)	- dataIndexFromInteractionPoint: `[implementation]`
	Determines the index of the data element that is under the given point. More...

(nullable CPTPlotRange *)	- plotRangeForField:
	Determines the smallest plot range that fully encloses the data for a particular field. More...

(nullable CPTPlotRange *)	- plotRangeForCoordinate:
	Determines the smallest plot range that fully encloses the data for a particular coordinate. More...

(nullable CPTPlotRange *)	- plotRangeEnclosingField:
	Determines the smallest plot range that fully encloses the entire plot for a particular field. More...

(nullable CPTPlotRange *)	- plotRangeEnclosingCoordinate:
	Determines the smallest plot range that fully encloses the entire plot for a particular coordinate. More...

(NSUInteger)	- dataIndexFromInteractionPoint:

(NSUInteger)	- numberOfFields
	Number of fields in a plot data record. More...

(nonnull CPTNumberArray *)	- fieldIdentifiers
	Identifiers (enum values) identifying the fields. More...

(nonnull CPTNumberArray *)	- fieldIdentifiersForCoordinate:

(CPTCoordinate)	- coordinateForFieldIdentifier:

(void)	- setDataNeedsReloading
	Marks the receiver as needing the data source reloaded before the content is next drawn. More...

(void)	- reloadData
	Reload all plot data, labels, and plot-specific information from the data source immediately. More...

(void)	- reloadDataIfNeeded
	Reload plot data from the data source only if the data cache is out of date. More...

(void)	- reloadDataInIndexRange:
	Reload plot data, labels, and plot-specific information in the given index range from the data source immediately. More...

(void)	- insertDataAtIndex:numberOfRecords:
	Insert records into the plot data cache at the given index. More...

(void)	- deleteDataInIndexRange:
	Delete records in the given index range from the plot data cache. More...

(void)	- reloadPlotData
	Reload all plot data from the data source immediately. More...

(void)	- reloadPlotDataInIndexRange:

(nullable CPTMutableNumericData *)	- cachedNumbersForField:
	Retrieves an array of numbers from the cache. More...

(nullable NSNumber *)	- cachedNumberForField:recordIndex:
	Retrieves a single number from the cache. More...

(double)	- cachedDoubleForField:recordIndex:
	Retrieves a single number from the cache. More...

(NSDecimal)	- cachedDecimalForField:recordIndex:
	Retrieves a single number from the cache. More...

(nullable NSArray *)	- cachedArrayForKey:
	Retrieves an array of values from the cache. More...

(nullable id)	- cachedValueForKey:recordIndex:
	Retrieves a single value from the cache. More...

(void)	- cacheNumbers:forField:
	Copies an array of numbers to the cache. More...

(void)	- cacheNumbers:forField:atRecordIndex:
	Copies an array of numbers to replace a part of the cache. More...

(void)	- cacheArray:forKey:
	Copies an array of arbitrary values to the cache. More...

(void)	- cacheArray:forKey:atRecordIndex:
	Copies an array of arbitrary values to replace a part of the cache. More...

(void)	- setNeedsRelabel
	Marks the receiver as needing to update all data labels before the content is next drawn. More...

(void)	- relabel
	Updates the data labels in the labelIndexRange. More...

(void)	- relabelIndexRange:
	Marks the receiver as needing to update a range of data labels before the content is next drawn. More...

(void)	- repositionAllLabelAnnotations
	Repositions all existing label annotations. More...

(void)	- reloadDataLabels
	Reload all data labels from the data source immediately. More...

(void)	- reloadDataLabelsInIndexRange:
	Reload data labels in the given index range from the data source immediately. More...

(void)	- positionLabelAnnotation:forIndex:

(NSUInteger)	- numberOfLegendEntries
	The number of legend entries provided by this plot. More...

(nullable NSString *)	- titleForLegendEntryAtIndex:

(nullable NSAttributedString *)	- attributedTitleForLegendEntryAtIndex:

(void)	- drawSwatchForLegend:atIndex:inRect:inContext:
	Draws the legend swatch of a legend entry. Subclasses should call `super` to draw the background fill and border. More...

(nullable id)	- numbersFromDataSourceForField:recordIndexRange:
	Gets a range of plot data for the given plot and field. More...

(BOOL)	- loadNumbersForAllFieldsFromDataSourceInRecordIndexRange:
	Gets a range of plot data for the given plot. More...

Public Instance Methods inherited from CPTAnnotationHostLayer
(void)	- addAnnotation:
	Adds an annotation to the receiver. More...

(void)	- removeAnnotation:
	Removes an annotation from the receiver. More...

(void)	- removeAllAnnotations
	Removes all annotations from the receiver. More...

(BOOL)	- pointingDeviceDraggedEvent:atPoint: `[implementation]`
	Informs the receiver that the user has moved their finger while touching the screen. More...

(BOOL)	- pointingDeviceCancelledEvent: `[implementation]`
	Informs the receiver that tracking of touches has been cancelled for any reason. More...

Public Instance Methods inherited from CPTLayer
(nullable instancetype)	- initWithCoder:
	Returns an object initialized from data in a given unarchiver. More...

(nonnull instancetype)	- initWithLayer:
	Override to copy or initialize custom fields of the specified layer. More...

(nonnull instancetype)	- init `[implementation]`
	Initializes a newly allocated CPTLayer object with an empty frame rectangle. More...

(void)	- logLayers
	Logs this layer and all of its sublayers. More...

(BOOL)	- pointingDeviceDownEvent:atPoint: `[implementation]`

(BOOL)	- pointingDeviceUpEvent:atPoint: `[implementation]`

(BOOL)	- pointingDeviceDraggedEvent:atPoint: `[implementation]`

(BOOL)	- pointingDeviceCancelledEvent: `[implementation]`

(nullable CPTNativeImage *)	- imageOfLayer
	Gets an image of the layer contents. More...

(void)	- setNeedsDisplayAllLayers
	Recursively marks this layer and all sublayers as needing to be redrawn. More...

(void)	- renderAsVectorInContext:
	Draws layer content into the provided graphics context. More...

(void)	- recursivelyRenderInContext:
	Draws layer content and the content of all sublayers into the provided graphics context. More...

(void)	- layoutAndRenderInContext:
	Updates the layer layout if needed and then draws layer content and the content of all sublayers into the provided graphics context. More...

(nonnull NSData *)	- dataForPDFRepresentationOfLayer
	Draws layer content and the content of all sublayers into a PDF document. More...

(void)	- applySublayerMaskToContext:forSublayer:withOffset:
	Recursively sets the clipping path of the given graphics context to the sublayer masking paths of its superlayers. More...

(void)	- applyMaskToContext:
	Sets the clipping path of the given graphics context to mask the content. More...

(void)	- pixelAlign
	Align the receiver’s position with pixel boundaries. More...

(void)	- sublayerMarginLeft:top:right:bottom:
	Returns the margins that should be left between the bounds of the receiver and all sublayers. More...

(void)	- layoutSublayers `[implementation]`
	Updates the layout of all sublayers. Sublayers fill the super layer’s bounds minus any padding. More...

Public Instance Methods inherited from CALayer
(BOOL)	- containsPoint:

(void)	- drawInContext:

(id)	- init

(id)	- initWithLayer

(void)	- layoutSublayers

(void)	- setNeedsDisplay

(void)	- setNeedsDisplayInRect:

(void)	- setNeedsLayout

Public Instance Methods inherited from NSObject
(Class)	- classForCoder

(id)	- copy

(void)	- dealloc

(void)	- finalize

(id)	- init

(id)	- mutableCopy

Public Instance Methods inherited from <NSObject>
(NSString *)	- description

(NSUInteger)	- hash

(BOOL)	- isEqual:

User Interaction

Properties
Appearance
CGFloat	pieRadius
	The radius of the overall pie chart. Defaults to `80%` of the initial frame size. More...

CGFloat	pieInnerRadius
	The inner radius of the pie chart, used to create a “donut hole”. Defaults to 0. More...

CGFloat	startAngle
	The starting angle for the first slice in radians. Defaults to `π/2`. More...

CGFloat	endAngle
	The ending angle for the last slice in radians. If `NaN`, the ending angle is the same as the start angle, i.e., the pie slices fill the whole circle. Defaults to `NaN`. More...

CPTPieDirection	sliceDirection
	Determines whether the pie slices are drawn in a clockwise or counter-clockwise direction from the starting point. Defaults to clockwise. More...

CGPoint	centerAnchor
	The position of the center of the pie chart with the x and y coordinates given as a fraction of the width and height, respectively. Defaults to (`0.5`, `0.5`). More...

Drawing
CPTLineStyle *	borderLineStyle
	The line style used to outline the pie slices. If nil, no border is drawn. Defaults to nil. More...

CPTFill *	overlayFill
	A fill drawn on top of the pie chart. Can be used to add shading and/or gloss effects. Defaults to nil. More...

Data Labels
BOOL	labelRotationRelativeToRadius
	If NO, the default, the data labels are rotated relative to the default coordinate system (the positive x-axis is zero rotation). If YES, the labels are rotated relative to the radius of the pie chart (zero rotation is parallel to the radius). More...

Properties inherited from CPTPlot
id< CPTPlotDataSource >	dataSource
	The data source for the plot. More...

NSString *	title
	The title of the plot displayed in the legend. More...

NSAttributedString *	attributedTitle
	The styled title of the plot displayed in the legend. More...

CPTPlotSpace *	plotSpace
	The plot space for the plot. More...

CPTPlotArea *	plotArea
	The plot area for the plot. More...

BOOL	alignsPointsToPixels
	If YES (the default), all plot points will be aligned to device pixels when drawing. More...

BOOL	dataNeedsReloading
	If YES, the plot data will be reloaded from the data source before the layer content is drawn. More...

NSUInteger	cachedDataCount
	The number of data points stored in the cache. More...

BOOL	doublePrecisionCache
	If YES, the cache holds data of type `double`, otherwise it holds NSDecimal. More...

CPTPlotCachePrecision	cachePrecision
	The numeric precision used to cache the plot data and perform all plot calculations. Defaults to CPTPlotCachePrecisionAuto. More...

CPTNumericDataType	doubleDataType
	The CPTNumericDataType used to cache plot data as `double`. More...

CPTNumericDataType	decimalDataType
	The CPTNumericDataType used to cache plot data as NSDecimal. More...

BOOL	needsRelabel
	If YES, the plot needs to be relabeled before the layer content is drawn. More...

BOOL	adjustLabelAnchors
	If YES, data labels anchor points are adjusted automatically when the labels are positioned. If NO, data labels anchor points do not change. More...

BOOL	showLabels
	Set to NO to override all other label settings and hide the data labels. Defaults to YES. More...

CGFloat	labelOffset
	The distance that labels should be offset from their anchor points. The direction of the offset is defined by subclasses. More...

CGFloat	labelRotation
	The rotation of the data labels in radians. Set this property to `π/2` to have labels read up the screen, for example. More...

NSUInteger	labelField
	The plot field identifier of the data field used to generate automatic labels. More...

CPTTextStyle *	labelTextStyle
	The text style used to draw the data labels. Set this property to nil to hide the data labels. More...

NSFormatter *	labelFormatter
	The number formatter used to format the data labels. Set this property to nil to hide the data labels. If you need a non-numerical label, such as a date, you can use a formatter than turns the numerical plot coordinate into a string (e.g., “Jan 10, 2010”). The CPTCalendarFormatter and CPTTimeFormatter classes are useful for this purpose. More...

CPTShadow *	labelShadow
	The shadow applied to each data label. More...

BOOL	drawLegendSwatchDecoration
	If YES (the default), additional plot-specific decorations, symbols, and/or colors will be drawn on top of the legend swatch rectangle. More...

Properties inherited from CPTAnnotationHostLayer
CPTAnnotationArray *	annotations
	An array of annotations attached to this layer. More...

Properties inherited from CPTLayer
CPTGraph *	graph
	The graph for the layer. More...

CGFloat	paddingLeft
	Amount to inset the left side of each sublayer. More...

CGFloat	paddingTop
	Amount to inset the top of each sublayer. More...

CGFloat	paddingRight
	Amount to inset the right side of each sublayer. More...

CGFloat	paddingBottom
	Amount to inset the bottom of each sublayer. More...

id< NSCopying, NSCoding, NSObject >	identifier
	An object used to identify the layer in collections. More...

CGFloat	contentsScale
	The scale factor applied to the layer. More...

BOOL	useFastRendering
	If YES, subclasses should optimize their drawing for speed over precision. More...

CPTShadow *	shadow
	The shadow drawn under the layer content. If nil (the default), no shadow is drawn. More...

CGSize	shadowMargin
	The maximum margin size needed to fully enclose the layer shadow. More...

BOOL	masksToBorder
	If YES, a sublayer mask is applied to clip sublayer content to the inside of the border. More...

CGPathRef	outerBorderPath
	A drawing path that encompasses the outer boundary of the layer border. More...

CGPathRef	innerBorderPath
	A drawing path that encompasses the inner boundary of the layer border. More...

CGPathRef	maskingPath
	A drawing path that encompasses the layer content including any borders. Set to `NULL` when no masking is desired. More...

CGPathRef	sublayerMaskingPath
	A drawing path that encompasses the layer content excluding any borders. Set to `NULL` when no masking is desired. More...

CPTSublayerSet *	sublayersExcludedFromAutomaticLayout
	A set of sublayers that should be excluded from the automatic sublayer layout. More...

Properties inherited from CALayer
CGPoint	anchorPoint

CGRect	bounds

CGFloat	contentsScale

CGFloat	cornerRadius

id	delegate

CGRect	frame

BOOL	masksToBounds

BOOL	needsDisplayOnBoundsChange

BOOL	opacity

BOOL	opaque

Properties inherited from <CAMediaTiming>
BOOL	autoreverses

CFTimeInterval	beginTime

CFTimeInterval	duration

NSString *	fillMode

float	repeatCount

id	repeatDuration

float	speed

CFTimeInterval	timeOffset

Detailed Description

A pie chart.

See also: See Pie Chart for a list of animatable properties.

Method Documentation

◆ defaultPieSliceColorForIndex:

+ (nonnull CPTColor *) defaultPieSliceColorForIndex: (NSUInteger) pieSliceIndex

Creates and returns a CPTColor that acts as the default color for that pie chart index.

Parameters

pieSliceIndex The pie slice index to return a color for.

Returns: A new CPTColor instance corresponding to the default value for this pie slice index.

◆ initWithFrame:

- (nonnull instancetype) initWithFrame: (CGRect) newFrame

implementation

Initializes a newly allocated CPTPieChart object with the provided frame rectangle.

This is the designated initializer. The initialized layer will have the following properties:

pieRadius = 40% of the minimum of the width and height of the frame rectangle
pieInnerRadius = 0.0
startAngle = π/2
endAngle = NaN
sliceDirection = CPTPieDirectionClockwise
centerAnchor = (0.5, 0.5)
borderLineStyle = nil
overlayFill = nil
labelRotationRelativeToRadius = NO
labelOffset = 10.0
labelField = CPTPieChartFieldSliceWidth

Parameters

newFrame The frame rectangle.

Returns: The initialized CPTPieChart object.

Reimplemented from CPTPlot.

◆ medianAngleForPieSliceIndex:

- (CGFloat) medianAngleForPieSliceIndex: (NSUInteger) idx

Computes the halfway-point between the starting and ending angles of a given pie slice.

Parameters

idx	A pie slice index.

Returns: The angle that is halfway between the slice's starting and ending angles, or NaN if an angle matching the given index cannot be found.

◆ pieSliceIndexAtAngle:

- (NSUInteger) pieSliceIndexAtAngle: (CGFloat) angle

Searches the pie slices for one corresponding to the given angle.

Parameters

angle An angle in radians.

Returns: The index of the pie slice that matches the given angle. Returns NSNotFound if no such pie slice exists.

◆ pointingDeviceDownEvent:atPoint:

- (BOOL) pointingDeviceDownEvent:	(nonnull CPTNativeEvent *)	event
atPoint:	(CGPoint)	interactionPoint

implementation

Informs the receiver that the user has started touching the screen.

If this plot has a delegate that responds to the -pieChart:sliceTouchDownAtRecordIndex: and/or -pieChart:sliceTouchDownAtRecordIndex:withEvent: methods, the interactionPoint is compared with each slice in index order. The delegate method will be called and this method returns YES for the first index where the interactionPoint is inside a pie slice. This method returns NO if the interactionPoint is outside all of the slices.

Parameters

event	The OS event.
interactionPoint	The coordinates of the interaction.

Returns: Whether the event was handled or not.

Reimplemented from CPTPlot.

◆ pointingDeviceUpEvent:atPoint:

- (BOOL) pointingDeviceUpEvent:	(nonnull CPTNativeEvent *)	event
atPoint:	(CGPoint)	interactionPoint

implementation

Informs the receiver that the user has ended touching the screen.

If this plot has a delegate that responds to the -pieChart:sliceTouchUpAtRecordIndex: and/or -pieChart:sliceTouchUpAtRecordIndex:withEvent: methods, the interactionPoint is compared with each slice in index order. The delegate method will be called and this method returns YES for the first index where the interactionPoint is inside a pie slice. This method returns NO if the interactionPoint is outside all of the slices.

If the pie slice being released is the same as the one that was pressed (see -pointingDeviceDownEvent:atPoint: ), if the delegate responds to the -pieChart:sliceWasSelectedAtRecordIndex: and/or -pieChart:sliceWasSelectedAtRecordIndex:withEvent: methods, these will be called.

Parameters

event	The OS event.
interactionPoint	The coordinates of the interaction.

Returns: Whether the event was handled or not.

Reimplemented from CPTPlot.

◆ reloadRadialOffsets

- (void) reloadRadialOffsets

Reload all slice offsets from the data source immediately.

◆ reloadRadialOffsetsInIndexRange:

- (void) reloadRadialOffsetsInIndexRange: (NSRange) indexRange

Reload slice offsets in the given index range from the data source immediately.

Parameters

indexRange The index range to load.

◆ reloadSliceFills

- (void) reloadSliceFills

Reload all slice fills from the data source immediately.

◆ reloadSliceFillsInIndexRange:

- (void) reloadSliceFillsInIndexRange: (NSRange) indexRange

Reload slice fills in the given index range from the data source immediately.

Parameters

indexRange The index range to load.

Property Documentation

◆ borderLineStyle

- (nullable CPTLineStyle *) borderLineStyle

readwritenonatomiccopy

The line style used to outline the pie slices. If nil, no border is drawn. Defaults to nil.

◆ labelRotationRelativeToRadius

- (BOOL) labelRotationRelativeToRadius

readwritenonatomicassign

If NO, the default, the data labels are rotated relative to the default coordinate system (the positive x-axis is zero rotation). If YES, the labels are rotated relative to the radius of the pie chart (zero rotation is parallel to the radius).

◆ overlayFill

- (nullable CPTFill *) overlayFill

readwritenonatomiccopy

A fill drawn on top of the pie chart. Can be used to add shading and/or gloss effects. Defaults to nil.

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

Source/CPTPieChart.h
Source/CPTPieChart.m

Public Class Methods

Public Instance Methods

Properties

Detailed Description

Method Documentation

◆ defaultPieSliceColorForIndex:

◆ initWithFrame:

◆ medianAngleForPieSliceIndex:

◆ pieSliceIndexAtAngle:

◆ pointingDeviceDownEvent:atPoint:

◆ pointingDeviceUpEvent:atPoint:

◆ reloadRadialOffsets

◆ reloadRadialOffsetsInIndexRange:

◆ reloadSliceFills

◆ reloadSliceFillsInIndexRange:

Property Documentation

◆ borderLineStyle

◆ labelRotationRelativeToRadius

◆ overlayFill