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Class weblab.gauge.Meter 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----weblab.gauge.Meter
public abstract class Meter
extends Panel
The base class for all Meter objects. Derived from sample codes by Liam Relihan.

Variable Index

o caption
o captionFont
o highestValue
o lowestValue
o numbersFont
o offScreenGraphics
o offScreenImage
o offScreenSize
o panelColor
o scaleGrad
o value

Constructor Index

o Meter()
Constructor for Meter class.
o Meter(double, double, double, double)
Constructor for Meter class.

Method Index

o drawMeter(Graphics)
draws the gauge in the background.
o getCaption()
o getCaptionFont()
o getHighestValue()
o getLowestValueValue()
o getMaximum()
get the maximum value that the meter can indicate
o getMinimum()
get the minimum value that the meter can indicate
o getMinimumSize()
o getNumbersFont()
o getPanelColor()
o getPreferredSize()
o getScaleGrad()
o getValue()
o paint(Graphics)
paint the meter on the foreground
o setCaption(String)
sets the caption
o setCaptionFont(Font)
sets the caption Font
o setHighestValue(double)
o setLowestValueValue(double)
o setNumbersFont(Font)
sets the font of the readings
o setPanelColor(Color)
sets the panel color
o setRange(int, int)
set the valid range of the meter
o setScaleGrad(double)
o setValue(double)
set the value that meter should indicate
o update(Graphics)
redefines inherited method to exclude screen clear

Variables

o lowestValue 
 protected double lowestValue
o highestValue 
 protected double highestValue
o scaleGrad 
 protected double scaleGrad
o value 
 protected double value
o panelColor 
 protected Color panelColor
o caption 
 protected String caption
o captionFont 
 protected Font captionFont
o numbersFont 
 protected Font numbersFont
o offScreenImage 
 protected Image offScreenImage
o offScreenSize 
 protected Dimension offScreenSize
o offScreenGraphics 
 protected Graphics offScreenGraphics

Constructors

o Meter 
 public Meter()
Constructor for Meter class. use default property values.

o Meter 
 public Meter(double lo,
              double hi,
              double grad,
              double val)
Constructor for Meter class.

Methods

o setRange 
 public void setRange(int theMinimum,
                      int theMaximum)
set the valid range of the meter

o setHighestValue 
 public void setHighestValue(double hi)
o getHighestValue 
 public double getHighestValue()
o setLowestValueValue 
 public void setLowestValueValue(double hi)
o getLowestValueValue 
 public double getLowestValueValue()
o setScaleGrad 
 public void setScaleGrad(double g)
o getScaleGrad 
 public double getScaleGrad()
o setValue 
 public void setValue(double theValue)
set the value that meter should indicate

o getValue 
 public double getValue()
o getMinimum 
 public double getMinimum()
get the minimum value that the meter can indicate

o getMaximum 
 public double getMaximum()
get the maximum value that the meter can indicate

o setPanelColor 
 public void setPanelColor(Color theColor)
sets the panel color

o getPanelColor 
 public Color getPanelColor()
o setCaption 
 public void setCaption(String theCaption)
sets the caption

o getCaption 
 public String getCaption()
o setCaptionFont 
 public void setCaptionFont(Font theFont)
sets the caption Font

o getCaptionFont 
 public Font getCaptionFont()
o setNumbersFont 
 public void setNumbersFont(Font theFont)
sets the font of the readings

o getNumbersFont 
 public Font getNumbersFont()
o paint 
 public synchronized void paint(Graphics g)
paint the meter on the foreground

Overrides:
paint in class Container
o update 
 public void update(Graphics g)
redefines inherited method to exclude screen clear

Overrides:
update in class Component
o drawMeter 
 protected abstract void drawMeter(Graphics g)
draws the gauge in the background. This allows the reduction of flicker.

o getMinimumSize 
 public abstract Dimension getMinimumSize()
Overrides:
getMinimumSize in class Container
o getPreferredSize 
 public abstract Dimension getPreferredSize()
Overrides:
getPreferredSize in class Container 
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