Class SpectrumInput 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----CanvasDB
                           |
                           +----SpectrumInput
class SpectrumInput
extends CanvasDB
This class produces a non-flicker canvas that allows free-hand drawing of a spectrum. The spectrum consists of 16 data points.

Variable Index

o data
array of 16 spectrum data points
o parent
reference to parent applet

Constructor Index

o SpectrumInput(Spectrum)
Constructs the spectrum input component.

Method Index

o drawAxes(Graphics)
Draws x and y axes of the spectrum and labels them.
o drawData(Graphics)
Draws spectrum as a polyline and marks the breakpoints.
o insets()
Overrides the default insets() method.
o minimumSize()
Overrides the default minimumSize() method.
o mouseDrag(Event, int, int)
An internal method used to handle mouse drag events.
o paint(Graphics)
Paints the spectrum in the current graphics context.
o preferredSize()
Overrides the default preferredSize() method.

Variables

o parent 
 Spectrum parent
reference to parent applet

o data 
 static float data[]
array of 16 spectrum data points

Constructors

o SpectrumInput 
 public SpectrumInput(Spectrum parent)
Constructs the spectrum input component.

Parameters:
parent - reference to the parent applet.

Methods

o drawAxes 
 void drawAxes(Graphics g)
Draws x and y axes of the spectrum and labels them.

o drawData 
 void drawData(Graphics g)
Draws spectrum as a polyline and marks the breakpoints.

o paint 
 public void paint(Graphics g)
Paints the spectrum in the current graphics context.

Overrides:
paint in class Canvas
o mouseDrag 
 public boolean mouseDrag(Event e,
                          int x,
                          int y)
An internal method used to handle mouse drag events. Spectrum is updated and repainted.

Overrides:
mouseDrag in class Component
o minimumSize 
 public Dimension minimumSize()
Overrides the default minimumSize() method.

Returns:
new Dimension
Overrides:
minimumSize in class Component
o preferredSize 
 public Dimension preferredSize()
Overrides the default preferredSize() method.

Returns:
new Dimension
Overrides:
preferredSize in class Component
o insets 
 public Insets insets()
Overrides the default insets() method.

Returns:
new Insets