echopoint.progressbar
Class DefaultBoundedRangeModel

java.lang.Object
  echopoint.progressbar.DefaultBoundedRangeModel

All Implemented Interfaces:

BoundedRangeModel, java.io.Serializable

public class DefaultBoundedRangeModel
extends java.lang.Object
implements BoundedRangeModel, java.io.Serializable

A generic implementation of BoundedRangeModel.

See Also:

Serialized Form

Field Summary

protected ChangeEvent	changeEvent Only one ChangeEvent is needed per model instance since the event's only (read-only) state is the source property.
protected EventListenerList	listenerList The listeners waiting for model changes.

Constructor Summary

DefaultBoundedRangeModel()
Initializes all of the properties with default values.

DefaultBoundedRangeModel(int value, int extent, int min, int max)
Initializes value, extent, minimum and maximum.

Method Summary

void	addChangeListener(ChangeListener l) Adds a ChangeListener to the button.
void	fireStateChanged() Notifies all listeners that have registered for this event type.
int	getExtent() Return the model's extent.
int	getMaximum() Return the model's maximum.
int	getMinimum() Return the model's minimum.
int	getValue() Return the model's current value.
boolean	getValueIsAdjusting() Returns true if the value is in the process of changing as a result of actions being taken by the user.
void	removeChangeListener(ChangeListener l) Removes a ChangeListener from the button.
void	setExtent(int n) Sets the extent to n after ensuring that n is greater than or equal to zero and falls within the model's constraints: minimum <= value <= value+extent <= maximum
void	setMaximum(int n) Sets the maximum to n after ensuring that n that the other three properties obey the model's constraints: minimum <= value <= value+extent <= maximum
void	setMinimum(int n) Sets the minimum to n after ensuring that n that the other three properties obey the model's constraints: minimum <= value <= value+extent <= maximum
void	setRangeProperties(int newValue, int newExtent, int newMin, int newMax, boolean adjusting) Sets all of the BoundedRangeModel properties after forcing the arguments to obey the usual constraints: minimum <= value <= value+extent <= maximum At most, one ChangeEvent is generated.
void	setValue(int n) Sets the current value of the model.
void	setValueIsAdjusting(boolean b) Sets the valueIsAdjusting property.
java.lang.String	toString() Returns a string that displays all of the BoundedRangeModel properties.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

changeEvent

protected transient ChangeEvent changeEvent

Only one ChangeEvent is needed per model instance since the event's only (read-only) state is the source property. The source of events generated here is always "this".

listenerList

protected EventListenerList listenerList

The listeners waiting for model changes.

Constructor Detail

DefaultBoundedRangeModel

public DefaultBoundedRangeModel()

Initializes all of the properties with default values. Those values are:

• value = 0
• extent = 0
• minimum = 0
• maximum = 100
• adjusting = false

DefaultBoundedRangeModel

public DefaultBoundedRangeModel(int value,
                                int extent,
                                int min,
                                int max)

Initializes value, extent, minimum and maximum. Adjusting is false. Throws an IllegalArgumentException if the following constraints aren't satisfied:

 min <= value <= value+extent <= max
 

Method Detail

addChangeListener

public void addChangeListener(ChangeListener l)

Adds a ChangeListener to the button.

Specified by:

addChangeListener in interface BoundedRangeModel

Parameters:

l - The ChangeListener to be added.

fireStateChanged

public void fireStateChanged()

Notifies all listeners that have registered for this event type.

getExtent

public int getExtent()

Return the model's extent.

Specified by:

getExtent in interface BoundedRangeModel

Returns:

the model's extent

getMaximum

public int getMaximum()

Return the model's maximum.

Specified by:

getMaximum in interface BoundedRangeModel

Returns:

the model's maximum

getMinimum

public int getMinimum()

Return the model's minimum.

Specified by:

getMinimum in interface BoundedRangeModel

Returns:

the value of the minimum property

getValue

public int getValue()

Return the model's current value.

Specified by:

getValue in interface BoundedRangeModel

getValueIsAdjusting

public boolean getValueIsAdjusting()

Returns true if the value is in the process of changing as a result of actions being taken by the user.

Specified by:

getValueIsAdjusting in interface BoundedRangeModel

removeChangeListener

public void removeChangeListener(ChangeListener l)

Removes a ChangeListener from the button.

Specified by:

removeChangeListener in interface BoundedRangeModel

Parameters:

l - The ChangeListener to be removed.

setExtent

public void setExtent(int n)

Sets the extent to n after ensuring that n is greater than or equal to zero and falls within the model's constraints:

     minimum <= value <= value+extent <= maximum
 

Specified by:

setExtent in interface BoundedRangeModel

setMaximum

public void setMaximum(int n)

Sets the maximum to n after ensuring that n that the other three properties obey the model's constraints:

     minimum <= value <= value+extent <= maximum
 

Specified by:

setMaximum in interface BoundedRangeModel

setMinimum

public void setMinimum(int n)

Sets the minimum to n after ensuring that n that the other three properties obey the model's constraints:

     minimum <= value <= value+extent <= maximum
 

Specified by:

setMinimum in interface BoundedRangeModel

setRangeProperties

public void setRangeProperties(int newValue,
                               int newExtent,
                               int newMin,
                               int newMax,
                               boolean adjusting)

Sets all of the BoundedRangeModel properties after forcing the arguments to obey the usual constraints:

     minimum <= value <= value+extent <= maximum
 

At most, one ChangeEvent is generated.

Specified by:

setRangeProperties in interface BoundedRangeModel

setValue

public void setValue(int n)

Sets the current value of the model. For a slider, that determines where the knob appears. Ensures that the new value, n falls within the model's constraints:

     minimum <= value <= value+extent <= maximum
 

Specified by:

setValue in interface BoundedRangeModel

setValueIsAdjusting

public void setValueIsAdjusting(boolean b)

Sets the valueIsAdjusting property.

Specified by:

setValueIsAdjusting in interface BoundedRangeModel

Parameters:

b - true if the upcoming changes to the value property are part of a series

toString

public java.lang.String toString()

Returns a string that displays all of the BoundedRangeModel properties.

Overrides:

toString in class java.lang.Object