lecho.lib.hellocharts.renderer

Class AbstractChartRenderer

java.lang.Object

lecho.lib.hellocharts.renderer.AbstractChartRenderer

All Implemented Interfaces:

ChartRenderer

Direct Known Subclasses:

BubbleChartRenderer, ColumnChartRenderer, ComboChartRenderer, LineChartRenderer, PieChartRenderer

public abstract class AbstractChartRenderer
extends java.lang.Object
implements ChartRenderer

Abstract renderer implementation, every chart renderer extends this class(although it is not required it helps).

Field Summary

Fields

Modifier and Type	Field and Description
protected Chart	chart
protected ChartComputator	computator
int	DEFAULT_LABEL_MARGIN_DP
protected float	density
protected android.graphics.Paint.FontMetricsInt	fontMetrics Font metrics for label paint, used to determine text height.
protected boolean	isValueLabelBackgroundAuto
protected boolean	isValueLabelBackgroundEnabled
protected boolean	isViewportCalculationEnabled If true maximum and current viewport will be calculated when chart data change or during data animations.
protected android.graphics.Paint	labelBackgroundPaint Paint for labels background.
protected android.graphics.RectF	labelBackgroundRect Holds coordinates for label background rect.
protected char[]	labelBuffer
protected int	labelMargin
protected int	labelOffset
protected android.graphics.Paint	labelPaint Paint for value labels.
protected float	scaledDensity
protected SelectedValue	selectedValue

Constructor Summary

Constructors

Constructor and Description
AbstractChartRenderer(android.content.Context context, Chart chart)

Method Summary

Modifier and Type	Method and Description
void	clearTouch() Clear value selection.
protected void	drawLabelTextAndBackground(android.graphics.Canvas canvas, char[] labelBuffer, int startIndex, int numChars, int autoBackgroundColor) Draws label text and label background if isValueLabelBackgroundEnabled is true.
Viewport	getCurrentViewport()
Viewport	getMaximumViewport()
SelectedValue	getSelectedValue()
boolean	isTouched() Returns true if there is value selected.
boolean	isViewportCalculationEnabled()
void	onChartDataChanged()
void	resetRenderer()
void	selectValue(SelectedValue selectedValue)
void	setCurrentViewport(Viewport viewport)
void	setMaximumViewport(Viewport maxViewport)
void	setViewportCalculationEnabled(boolean isEnabled)

Methods inherited from class java.lang.Object

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

Methods inherited from interface lecho.lib.hellocharts.renderer.ChartRenderer

checkTouch, draw, drawUnclipped, onChartSizeChanged, onChartViewportChanged

Field Detail

DEFAULT_LABEL_MARGIN_DP

public int DEFAULT_LABEL_MARGIN_DP

chart

protected Chart chart

computator

protected ChartComputator computator

labelPaint

protected android.graphics.Paint labelPaint

Paint for value labels.

labelBackgroundPaint

protected android.graphics.Paint labelBackgroundPaint

Paint for labels background.

labelBackgroundRect

protected android.graphics.RectF labelBackgroundRect

Holds coordinates for label background rect.

fontMetrics

protected android.graphics.Paint.FontMetricsInt fontMetrics

Font metrics for label paint, used to determine text height.

isViewportCalculationEnabled

protected boolean isViewportCalculationEnabled

If true maximum and current viewport will be calculated when chart data change or during data animations.

density

protected float density

scaledDensity

protected float scaledDensity

selectedValue

protected SelectedValue selectedValue

labelBuffer

protected char[] labelBuffer

labelOffset

protected int labelOffset

labelMargin

protected int labelMargin

isValueLabelBackgroundEnabled

protected boolean isValueLabelBackgroundEnabled

isValueLabelBackgroundAuto

protected boolean isValueLabelBackgroundAuto

Constructor Detail

AbstractChartRenderer

public AbstractChartRenderer(android.content.Context context,
                             Chart chart)

Method Detail

resetRenderer

public void resetRenderer()

Specified by:

resetRenderer in interface ChartRenderer

onChartDataChanged

public void onChartDataChanged()

Specified by:

onChartDataChanged in interface ChartRenderer

drawLabelTextAndBackground

protected void drawLabelTextAndBackground(android.graphics.Canvas canvas,
                                          char[] labelBuffer,
                                          int startIndex,
                                          int numChars,
                                          int autoBackgroundColor)

Draws label text and label background if isValueLabelBackgroundEnabled is true.

isTouched

public boolean isTouched()

Description copied from interface: ChartRenderer

Returns true if there is value selected.

Specified by:

isTouched in interface ChartRenderer

clearTouch

public void clearTouch()

Description copied from interface: ChartRenderer

Clear value selection.

Specified by:

clearTouch in interface ChartRenderer

getMaximumViewport

public Viewport getMaximumViewport()

Specified by:

getMaximumViewport in interface ChartRenderer

setMaximumViewport

public void setMaximumViewport(Viewport maxViewport)

Specified by:

setMaximumViewport in interface ChartRenderer

getCurrentViewport

public Viewport getCurrentViewport()

Specified by:

getCurrentViewport in interface ChartRenderer

setCurrentViewport

public void setCurrentViewport(Viewport viewport)

Specified by:

setCurrentViewport in interface ChartRenderer

isViewportCalculationEnabled

public boolean isViewportCalculationEnabled()

Specified by:

isViewportCalculationEnabled in interface ChartRenderer

setViewportCalculationEnabled

public void setViewportCalculationEnabled(boolean isEnabled)

Specified by:

setViewportCalculationEnabled in interface ChartRenderer

selectValue

public void selectValue(SelectedValue selectedValue)

Specified by:

selectValue in interface ChartRenderer

getSelectedValue

public SelectedValue getSelectedValue()

Specified by:

getSelectedValue in interface ChartRenderer