AbstractChart (Codename One API)

java.lang.Object
- com.codename1.charts.views.AbstractChart

Direct Known Subclasses:

RoundChart, XYChart
```
public abstract class AbstractChart
extends Object
```
An abstract class to be implemented by the chart rendering classes.

Constructor Summary

Constructors
Constructor and Description

AbstractChart()

Constructors
Constructor and Description
`AbstractChart()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract void`	`draw(Canvas canvas, int x, int y, int width, int height, Paint paint)` The graphical representation of the chart.
`protected void`	`drawBackground(DefaultRenderer renderer, Canvas canvas, int x, int y, int width, int height, Paint paint, boolean newColor, int color)` Draws the chart background.
`protected void`	`drawLabel(Canvas canvas, String labelText, DefaultRenderer renderer, List<Rectangle2D> prevLabelsBounds, int centerX, int centerY, float shortRadius, float longRadius, float currentAngle, float angle, int left, int right, int color, Paint paint, boolean line, boolean display)` Draws a text label.
`protected int`	`drawLegend(Canvas canvas, DefaultRenderer renderer, String[] titles, int left, int right, int y, int width, int height, int legendSize, Paint paint, boolean calculate)` Draws the chart legend.
`abstract void`	`drawLegendShape(Canvas canvas, SimpleSeriesRenderer renderer, float x, float y, int seriesIndex, Paint paint)` The graphical representation of the legend shape.
`protected void`	`drawPath(Canvas canvas, float[] points, Paint paint, boolean circular)` The graphical representation of a path.
`protected void`	`drawPath(Canvas canvas, List<Float> points, Paint paint, boolean circular)` The graphical representation of a path.
`protected void`	`drawString(Canvas canvas, String text, float x, float y, Paint paint)` Draw a multiple lines string.
`protected boolean`	`getExceed(float currentWidth, DefaultRenderer renderer, int right, int width)` Calculates if the current width exceeds the total width.
`protected String`	`getLabel(NumberFormat format, double label)` Makes sure the fraction digit is not displayed, if not needed.
`abstract int`	`getLegendShapeWidth(int seriesIndex)` Returns the legend shape width.
`protected int`	`getLegendSize(DefaultRenderer renderer, int defaultHeight, float extraHeight)` Calculates the current legend size.
`SeriesSelection`	`getSeriesAndPointForScreenCoordinate(Point screenPoint)` Given screen coordinates, returns the series and point indexes of a chart element.
`boolean`	`isNullValue(double value)`
`boolean`	`isVertical(DefaultRenderer renderer)` Checks if the current chart is rendered as vertical.

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractChart
```
public AbstractChart()
```
- Method Detail
  - draw
```
public abstract void draw(Canvas canvas,
                          int x,
                          int y,
                          int width,
                          int height,
                          Paint paint)
```
    The graphical representation of the chart.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    x - the top left x value of the view to draw to
    
    y - the top left y value of the view to draw to
    
    width - the width of the view to draw to
    
    height - the height of the view to draw to
    
    paint - the paint
  - drawBackground
```
protected void drawBackground(DefaultRenderer renderer,
                              Canvas canvas,
                              int x,
                              int y,
                              int width,
                              int height,
                              Paint paint,
                              boolean newColor,
                              int color)
```
    Draws the chart background.
    
    Parameters:
    
    renderer - the chart renderer
    
    canvas - the canvas to paint to
    
    x - the top left x value of the view to draw to
    
    y - the top left y value of the view to draw to
    
    width - the width of the view to draw to
    
    height - the height of the view to draw to
    
    paint - the paint used for drawing
    
    newColor - if a new color is to be used
    
    color - the color to be used
  - drawLegend
```
protected int drawLegend(Canvas canvas,
                         DefaultRenderer renderer,
                         String[] titles,
                         int left,
                         int right,
                         int y,
                         int width,
                         int height,
                         int legendSize,
                         Paint paint,
                         boolean calculate)
```
    Draws the chart legend.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    renderer - the series renderer
    
    titles - the titles to go to the legend
    
    left - the left X value of the area to draw to
    
    right - the right X value of the area to draw to
    
    y - the y value of the area to draw to
    
    width - the width of the area to draw to
    
    height - the height of the area to draw to
    
    legendSize - the legend size
    
    paint - the paint to be used for drawing
    
    calculate - if only calculating the legend size
    
    Returns:
    
    the legend height
  - drawString
```
protected void drawString(Canvas canvas,
                          String text,
                          float x,
                          float y,
                          Paint paint)
```
    Draw a multiple lines string.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    text - the text to be painted
    
    x - the x value of the area to draw to
    
    y - the y value of the area to draw to
    
    paint - the paint to be used for drawing
  - getExceed
```
protected boolean getExceed(float currentWidth,
                            DefaultRenderer renderer,
                            int right,
                            int width)
```
    Calculates if the current width exceeds the total width.
    
    Parameters:
    
    currentWidth - the current width
    
    renderer - the renderer
    
    right - the right side pixel value
    
    width - the total width
    
    Returns:
    
    if the current width exceeds the total width
  - isVertical
```
public boolean isVertical(DefaultRenderer renderer)
```
    Checks if the current chart is rendered as vertical.
    
    Parameters:
    
    renderer - the renderer
    
    Returns:
    
    if the chart is rendered as a vertical one
  - getLabel
```
protected String getLabel(NumberFormat format,
                          double label)
```
    Makes sure the fraction digit is not displayed, if not needed.
    
    Parameters:
    
    format - the number format for the label
    
    label - the input label value
    
    Returns:
    
    the label without the useless fraction digit
  - drawPath
```
protected void drawPath(Canvas canvas,
                        List<Float> points,
                        Paint paint,
                        boolean circular)
```
    The graphical representation of a path.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    points - the points that are contained in the path to paint
    
    paint - the paint to be used for painting
    
    circular - if the path ends with the start point
  - drawPath
```
protected void drawPath(Canvas canvas,
                        float[] points,
                        Paint paint,
                        boolean circular)
```
    The graphical representation of a path.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    points - the points that are contained in the path to paint
    
    paint - the paint to be used for painting
    
    circular - if the path ends with the start point
  - getLegendShapeWidth
```
public abstract int getLegendShapeWidth(int seriesIndex)
```
    Returns the legend shape width.
    
    Parameters:
    
    seriesIndex - the series index
    
    Returns:
    
    the legend shape width
  - drawLegendShape
```
public abstract void drawLegendShape(Canvas canvas,
                                     SimpleSeriesRenderer renderer,
                                     float x,
                                     float y,
                                     int seriesIndex,
                                     Paint paint)
```
    The graphical representation of the legend shape.
    
    Parameters:
    
    canvas - the canvas to paint to
    
    renderer - the series renderer
    
    x - the x value of the point the shape should be drawn at
    
    y - the y value of the point the shape should be drawn at
    
    seriesIndex - the series index
    
    paint - the paint to be used for drawing
  - getLegendSize
```
protected int getLegendSize(DefaultRenderer renderer,
                            int defaultHeight,
                            float extraHeight)
```
    Calculates the current legend size.
    
    Parameters:
    
    renderer - the renderer
    
    defaultHeight - the default height
    
    extraHeight - the added extra height
    
    Returns:
    
    the legend size
  - drawLabel
```
protected void drawLabel(Canvas canvas,
                         String labelText,
                         DefaultRenderer renderer,
                         List<Rectangle2D> prevLabelsBounds,
                         int centerX,
                         int centerY,
                         float shortRadius,
                         float longRadius,
                         float currentAngle,
                         float angle,
                         int left,
                         int right,
                         int color,
                         Paint paint,
                         boolean line,
                         boolean display)
```
    Draws a text label.
    
    Parameters:
    
    canvas - the canvas
    
    labelText - the label text
    
    renderer - the renderer
    
    prevLabelsBounds - the previous rendered label bounds
    
    centerX - the round chart center on X axis
    
    centerY - the round chart center on Y axis
    
    shortRadius - the short radius for the round chart
    
    longRadius - the long radius for the round chart
    
    currentAngle - the current angle
    
    angle - the label extra angle
    
    left - the left side
    
    right - the right side
    
    color - the label color
    
    paint - the paint
    
    line - if a line to the label should be drawn
    
    display - display the label anyway
  - isNullValue
```
public boolean isNullValue(double value)
```
  - getSeriesAndPointForScreenCoordinate
```
public SeriesSelection getSeriesAndPointForScreenCoordinate(Point screenPoint)
```
    Given screen coordinates, returns the series and point indexes of a chart element. If there is no chart element (line, point, bar, etc) at those coordinates, null is returned.
    
    Parameters:
    
    screenPoint -
    
    Returns:
    
    the series and point indexes

Class AbstractChart

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AbstractChart

Method Detail

draw

drawBackground

drawLegend

drawString

getExceed

isVertical

getLabel

drawPath

drawPath

getLegendShapeWidth

drawLegendShape

getLegendSize

drawLabel

isNullValue

getSeriesAndPointForScreenCoordinate