com.googlecode.charts4j
Class AbstractGraphChart

java.lang.Object
  extended by com.googlecode.charts4j.AbstractGraphChart
All Implemented Interfaces:
GChart, GraphChart, TitledChart
Direct Known Subclasses:
AbstractAxisChart, VennDiagram

public abstract class AbstractGraphChart
extends Object
implements GraphChart, TitledChart

Abstract type for all charts that support legend positions. (MapChart, GoogleOMeter and PieChart do not support legend positions.)

Author:
Julien Chastang (julien.c.chastang at gmail dot com)

Nested Class Summary
 
Nested classes/interfaces inherited from interface com.googlecode.charts4j.TitledChart
TitledChart.ChartTitle
 
Method Summary
 void setAreaFill(Fill fill)
          Specify chart area fill.
 void setBackgroundFill(Fill fill)
          Specify background fill.
 void setDataEncoding(DataEncoding dataEncoding)
          Set the data encoding scheme.
 void setLegendPosition(LegendPosition legendPosition)
          Specify where the chart legends will appear.
 void setSize(int width, int height)
          Set the chart size.
 void setTitle(String title)
          Specify a chart title.
 void setTitle(String title, Color color, int fontSize)
          Specify a chart title with color and font size.
 void setTransparency(int opacity)
          Specify the chart transparency.
 String toURLForHTML()
          Create a URL with the ampersand character entity reference (&) in place of an ampersand.
 String toURLString()
          Create a URL string given the information supplied to this chart.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

setTitle

public final void setTitle(String title)
Specify a chart title. Use a pipe character (|) to force a line break.

Specified by:
setTitle in interface TitledChart
Parameters:
title - Chart title. Cannot be null.

setTitle

public final void setTitle(String title,
                           Color color,
                           int fontSize)
Specify a chart title with color and font size. Use a pipe character (|) to force a line break.

Specified by:
setTitle in interface TitledChart
Parameters:
title - Chart title. Cannot be null.
color - Chart title color. Cannot be null.
fontSize - Chart title font size. Must be > 0.

setLegendPosition

public final void setLegendPosition(LegendPosition legendPosition)
Specify where the chart legends will appear.

Specified by:
setLegendPosition in interface GraphChart
Parameters:
legendPosition - The legend position. Cannot be null.

setAreaFill

public final void setAreaFill(Fill fill)
Specify chart area fill.

Specified by:
setAreaFill in interface GraphChart
Parameters:
fill - Chart area fill. Cannot be null. This mutable parameter is defensively copied upon entry.

setSize

public void setSize(int width,
                    int height)
Set the chart size. If no size is specified, the chart will default to 200x125.

Specified by:
setSize in interface GChart
Parameters:
width - chart width. Must be > 0 and <= 1000.
height - chart height. Must be > 0 and <= 1000.
See Also:
Chart Size

toURLString

public final String toURLString()
Create a URL string given the information supplied to this chart. You can copy and paste this string into your web browser, and see if you get the results you anticipated. Better yet, incorporate this method call or GChart.toURLForHTML() into your Internet application to dynamically generate charts. URLs beyond 2000 characters are not recommended. You can sometimes get away with the simple encoding scheme if URL length is a problem. See GChart.setDataEncoding(DataEncoding dataEncoding)

Specified by:
toURLString in interface GChart
Returns:
URL String
See Also:
DataEncoding, WWW FAQs: What is the maximum length of a URL?

toURLForHTML

public final String toURLForHTML()
Create a URL with the ampersand character entity reference (&amp;) in place of an ampersand. Useful for embedding your link in a web page.

Specified by:
toURLForHTML in interface GChart
Returns:
URL string

setBackgroundFill

public void setBackgroundFill(Fill fill)
Specify background fill.

Specified by:
setBackgroundFill in interface GChart
Parameters:
fill - Background fill. Cannot be null.
See Also:
Fill

setTransparency

public void setTransparency(int opacity)
Specify the chart transparency. Use cautiously as this feature may obscure background fills. Also there appears to be a bug in the Google Chart API where setting a transparency makes the label color disappear.

Specified by:
setTransparency in interface GChart
Parameters:
opacity - Supply a number between 0 and 100. 0 is completely transparent, and 100 is completely opaque.

setDataEncoding

public final void setDataEncoding(DataEncoding dataEncoding)
Set the data encoding scheme. The only advantage to the simple encoding scheme is it will ultimately result in shorter URLs, but at the cost of lower resolution. charts4j defaults to the extended encoding, but if you have lots of data and if you are willing to sacrifice resolution, the simple encoding may be right for you.

Specified by:
setDataEncoding in interface GChart
Parameters:
dataEncoding - Supply the data encoding, either simple or extended. Cannot be null.