com.github.mikephil.charting.renderer

Class PieChartRenderer

java.lang.Object

com.github.mikephil.charting.renderer.Renderer

com.github.mikephil.charting.renderer.DataRenderer

com.github.mikephil.charting.renderer.PieChartRenderer

public class PieChartRenderer
extends DataRenderer

Field Summary

Fields

Modifier and Type	Field and Description
protected android.graphics.Canvas	mBitmapCanvas
protected PieChart	mChart
protected java.lang.ref.WeakReference<android.graphics.Bitmap>	mDrawBitmap Bitmap for drawing the center hole
protected android.graphics.Path	mDrawCenterTextPathBuffer
protected android.graphics.RectF	mDrawHighlightedRectF
protected android.graphics.Paint	mHolePaint paint for the hole in the center of the pie chart and the transparent circle
protected android.graphics.Paint	mTransparentCirclePaint
protected android.graphics.Paint	mValueLinePaint

Fields inherited from class com.github.mikephil.charting.renderer.DataRenderer

mAnimator, mDrawPaint, mHighlightPaint, mRenderPaint, mValuePaint

Fields inherited from class com.github.mikephil.charting.renderer.Renderer

mViewPortHandler

Constructor Summary

Constructors

Constructor and Description
PieChartRenderer(PieChart chart, ChartAnimator animator, ViewPortHandler viewPortHandler)

Method Summary

Modifier and Type	Method and Description
protected float	calculateMinimumRadiusForSpacedSlice(MPPointF center, float radius, float angle, float arcStartPointX, float arcStartPointY, float startAngle, float sweepAngle)
protected void	drawCenterText(android.graphics.Canvas c) draws the description text in the center of the pie chart makes most sense when center-hole is enabled
void	drawData(android.graphics.Canvas c) Draws the actual data in form of lines, bars, ...
protected void	drawDataSet(android.graphics.Canvas c, IPieDataSet dataSet)
protected void	drawEntryLabel(android.graphics.Canvas c, java.lang.String label, float x, float y) Draws an entry label at the specified position.
void	drawExtras(android.graphics.Canvas c) Draws any kind of additional information (e.g.
void	drawHighlighted(android.graphics.Canvas c, Highlight[] indices) Draws all highlight indicators for the values that are currently highlighted.
protected void	drawHole(android.graphics.Canvas c) draws the hole in the center of the chart and the transparent circle / hole
protected void	drawRoundedSlices(android.graphics.Canvas c) This gives all pie-slices a rounded edge.
void	drawValues(android.graphics.Canvas c) Loops over all Entrys and draws their values.
android.text.TextPaint	getPaintCenterText()
android.graphics.Paint	getPaintEntryLabels()
android.graphics.Paint	getPaintHole()
android.graphics.Paint	getPaintTransparentCircle()
protected float	getSliceSpace(IPieDataSet dataSet) Calculates the sliceSpace to use based on visible values and their size compared to the set sliceSpace.
void	initBuffers() Initializes the buffers used for rendering with a new size.
void	releaseBitmap() Releases the drawing bitmap.

Methods inherited from class com.github.mikephil.charting.renderer.DataRenderer

applyValueTextStyle, drawValue, getPaintHighlight, getPaintRender, getPaintValues, isDrawingValuesAllowed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mChart

protected PieChart mChart

mHolePaint

protected android.graphics.Paint mHolePaint

paint for the hole in the center of the pie chart and the transparent circle

mTransparentCirclePaint

protected android.graphics.Paint mTransparentCirclePaint

mValueLinePaint

protected android.graphics.Paint mValueLinePaint

mDrawBitmap

protected java.lang.ref.WeakReference<android.graphics.Bitmap> mDrawBitmap

Bitmap for drawing the center hole

mBitmapCanvas

protected android.graphics.Canvas mBitmapCanvas

mDrawCenterTextPathBuffer

protected android.graphics.Path mDrawCenterTextPathBuffer

mDrawHighlightedRectF

protected android.graphics.RectF mDrawHighlightedRectF

Constructor Detail

PieChartRenderer

public PieChartRenderer(PieChart chart,
                        ChartAnimator animator,
                        ViewPortHandler viewPortHandler)

Method Detail

getPaintHole

public android.graphics.Paint getPaintHole()

getPaintTransparentCircle

public android.graphics.Paint getPaintTransparentCircle()

getPaintCenterText

public android.text.TextPaint getPaintCenterText()

getPaintEntryLabels

public android.graphics.Paint getPaintEntryLabels()

initBuffers

public void initBuffers()

Description copied from class: DataRenderer

Initializes the buffers used for rendering with a new size. Since this method performs memory allocations, it should only be called if necessary.

Specified by:

initBuffers in class DataRenderer

drawData

public void drawData(android.graphics.Canvas c)

Description copied from class: DataRenderer

Draws the actual data in form of lines, bars, ... depending on Renderer subclass.

Specified by:

drawData in class DataRenderer

calculateMinimumRadiusForSpacedSlice

protected float calculateMinimumRadiusForSpacedSlice(MPPointF center,
                                                     float radius,
                                                     float angle,
                                                     float arcStartPointX,
                                                     float arcStartPointY,
                                                     float startAngle,
                                                     float sweepAngle)

getSliceSpace

protected float getSliceSpace(IPieDataSet dataSet)

Calculates the sliceSpace to use based on visible values and their size compared to the set sliceSpace.

Parameters:

dataSet -

Returns:

drawDataSet

protected void drawDataSet(android.graphics.Canvas c,
                           IPieDataSet dataSet)

drawValues

public void drawValues(android.graphics.Canvas c)

Description copied from class: DataRenderer

Loops over all Entrys and draws their values.

Specified by:

drawValues in class DataRenderer

drawEntryLabel

protected void drawEntryLabel(android.graphics.Canvas c,
                              java.lang.String label,
                              float x,
                              float y)

Draws an entry label at the specified position.

Parameters:

c -

label -

x -

y -

drawExtras

public void drawExtras(android.graphics.Canvas c)

Description copied from class: DataRenderer

Draws any kind of additional information (e.g. line-circles).

Specified by:

drawExtras in class DataRenderer

drawHole

protected void drawHole(android.graphics.Canvas c)

draws the hole in the center of the chart and the transparent circle / hole

drawCenterText

protected void drawCenterText(android.graphics.Canvas c)

draws the description text in the center of the pie chart makes most sense when center-hole is enabled

drawHighlighted

public void drawHighlighted(android.graphics.Canvas c,
                            Highlight[] indices)

Description copied from class: DataRenderer

Draws all highlight indicators for the values that are currently highlighted.

Specified by:

drawHighlighted in class DataRenderer

indices - the highlighted values

drawRoundedSlices

protected void drawRoundedSlices(android.graphics.Canvas c)

This gives all pie-slices a rounded edge.

Parameters:

c -

releaseBitmap

public void releaseBitmap()

Releases the drawing bitmap. This should be called when LineChart.onDetachedFromWindow().