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Class guinea.ui.GradeBar

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----guinea.ui.GradeBar

public class GradeBar

extends Container

implements AdjustmentListener, QuestionInterface, ControlInterface, PropertyLoader

Variable Index

· controlCommand

· isControl

· isQuestion

· showLabels

· showValue

Constructor Index

· GradeBar()

Create a new grade bar with default grade parameters and no question.

· GradeBar(double, double, int)

Create a new grade bar with given parameters.

· GradeBar(double, double, int, String)

Create a new grade bar with given parameters.

· GradeBar(String)

Create a new grade bar with default grade parameters.

Method Index

· addAnswerListener(AnswerListener)

Add a listener that is interested to receive answer events.

· addControlListener(ControlListener)

Add a control listener to receive events from this control component.

· adjustmentValueChanged(AdjustmentEvent)

· getAnswer()

Get answer for question.

· getAnswer_internal()

· getChoiceFormat()

Get the choice format used for formatting the grade.

· getControlValue()

Get the value of this controller.

· getDecimals()

Get number of decimals.

· getMaximum()

Get the maximum value of grade.

· getMinimum()

Get the minimum value of grade.

· getPreferredSize()

Returns the preferred size of this container.

· getQuestion()

Get the text of the question.

· getQuestionFont()

Get font of the question text.

· getQuestionID()

Get the ID of the question.

· isAnswered()

See if an aswer has been given.

· isControlEnabled()

Test whether control is enabled or disabled.

· isQuestionEnabled()

Test whether question is enabled or disabled.

· paint(Graphics)

Paints the container.

· propertyLoad(Properties, String)

· removeAnswerListener(AnswerListener)

Removes the specified listener so it no longer receives control motion events from this component.

· removeControlListener(ControlListener)

Remove a control listener so that control events are no longer sent to that listener.

· reset()

Reset question to default answer and/or to unanswered state.

· setAnswer(Object)

Set answer of question.

· setChoiceFormat(ChoiceFormat)

Set the choice format for showing an adjective corresponding to a grade.

· setChoiceFormat(double[], String[])

Set the choice format for showing an adjective corresponding to a grade.

· setChoiceFormat(String)

Set the choice format for showing an adjective corresponding to a grade using a pattern.

· setControlEnabled(boolean)

Enable or disable control component.

· setControlValue(Object)

Set the value of this controller.

· setDecimals(int)

Set number of decimals to show and return in answer.

· setEnabled(boolean)

Fix an error in java's setEnabled for Containers

· setMaximum(double)

Set maximum value of grade.

· setMinimum(double)

Set minimum value of grade.

· setQuestion(String)

Set the text of the question.

· setQuestionEnabled(boolean)

Enable or disable question component.

· setQuestionFont(Font)

Set font of the question text.

· setQuestionID(String)

Set the ID of this question.

· valueToString(double)

Variables

 protected boolean showValue

 protected boolean showLabels

 protected boolean isQuestion

 protected boolean isControl

 protected String controlCommand

Constructors

 public GradeBar()

 public GradeBar(String qtext)

Create a new grade bar with default grade parameters.

Parameters:

qtext - Text of question.

 public GradeBar(double minVal,
                 double maxVal,
                 int decimals)

 public GradeBar(double minVal,
                 double maxVal,
                 int decimals,
                 String qtext)

Create a new grade bar with given parameters.

Parameters:

minVal - minimum value of grade.

maxVal - maximum value of grade.

decimals - number of decimals.

qtext - text of question.

Methods

 public void setMinimum(double minVal)

Set minimum value of grade.

Parameters:

minVal - minimum value of grade.

 public double getMinimum()

Get the minimum value of grade.

Returns:

minimum value of grade.

 public void setMaximum(double maxVal)

Set maximum value of grade.

Parameters:

maxVal - maximum value of grade.

 public double getMaximum()

Get the maximum value of grade.

Returns:

maximum value of grade.

 public void paint(Graphics g)

Paints the container.

Overrides:

paint in class Container

 public synchronized void setDecimals(int decimals)

Set number of decimals to show and return in answer.

Parameters:

decimals - number of decimals or 0 if no decimals wanted.

 public int getDecimals()

Get number of decimals.

 public void setChoiceFormat(double limits[],
                             String names[])

Set the choice format for showing an adjective corresponding to a grade. Constructs with limits and corresponding formats based on the pattern.

See Also:

ChoiceFormat, setChoices

 public void setChoiceFormat(String pattern)

Set the choice format for showing an adjective corresponding to a grade using a pattern.

See Also:

ChoiceFormat, applyPattern

 public void setChoiceFormat(ChoiceFormat cf)

Set the choice format for showing an adjective corresponding to a grade.

Parameters:

cf - The choice format to be used.

 public ChoiceFormat getChoiceFormat()

Get the choice format used for formatting the grade.

Returns:

A ChoiceFormat object.

 protected String valueToString(double value)

 public void adjustmentValueChanged(AdjustmentEvent e)

 public void setQuestionEnabled(boolean enabled)

Enable or disable question component.

Parameters:

enabled - Use true to enable, false to disable the question.

 public boolean isQuestionEnabled()

Test whether question is enabled or disabled.

Returns:

true if question is enabled, false if not.

 public Object getAnswer()

Get answer for question. If number of decimals is 0, returns a java.lang.Integer, otherwise returns a java.lang.Double.

Returns:

the answer as a java.lang.Number or null if question hasn't been answered.

 protected Object getAnswer_internal()

 public void setAnswer(Object answer)

Set answer of question.

Parameters:

answer - the answer as a java.lang.Number. null clears answer (question becomes unanswered. Same as reset().

 public void reset()

Reset question to default answer and/or to unanswered state.

 public boolean isAnswered()

See if an aswer has been given.

Returns:

true if user has given an answer.

 public void setQuestion(String question)

Set the text of the question.

Parameters:

question - text of the question.

 public String getQuestion()

Get the text of the question.

Returns:

text of the question.

 public void setQuestionID(String id)

Set the ID of this question.

Parameters:

id - ID label of question.

 public String getQuestionID()

Get the ID of the question.

Returns:

ID label of the question.

 public void setQuestionFont(Font f)

Set font of the question text.

 public Font getQuestionFont()

Get font of the question text.

 public synchronized void addAnswerListener(AnswerListener listener)

Add a listener that is interested to receive answer events.

Parameters:

listener - A listener.

 public synchronized void removeAnswerListener(AnswerListener listener)

Removes the specified listener so it no longer receives control motion events from this component.

Parameters:

listener - A control listener.

 public void setControlEnabled(boolean enabled)

Enable or disable control component.

Parameters:

enabled - Use true to enable, false to disable the controller.

 public boolean isControlEnabled()

Test whether control is enabled or disabled.

Returns:

true if controller is enabled, false if not.

 public void setControlValue(Object value)

Set the value of this controller. Can be used to set initial value of controlled variable.

Parameters:

value - the value to set.

 public Object getControlValue()

Get the value of this controller. Can be used to get initial value of controlled variable.

Parameters:

value - The value to get.

 public void addControlListener(ControlListener listener)

Add a control listener to receive events from this control component.

Parameters:

listener - a listener

 public void removeControlListener(ControlListener listener)

Remove a control listener so that control events are no longer sent to that listener.

Parameters:

listener - a listener

 public void setEnabled(boolean enable)

Fix an error in java's setEnabled for Containers

Parameters:

enable - enable or disable component.

Overrides:

setEnabled in class Component

 public Dimension getPreferredSize()

Returns the preferred size of this container.

Overrides:

getPreferredSize in class Container

 public void propertyLoad(Properties p,
                          String name) throws IllegalArgumentException

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