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## javax.swing
Class DefaultBoundedRangeModel

    java.lang.Object
      |
      +--javax.swing.DefaultBoundedRangeModel

All Implemented Interfaces:
  BoundedRangeModel, Serializable

public class DefaultBoundedRangeModel
extends Object
implements BoundedRangeModel, Serializable

A generic implementation of BoundedRangeModel.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the `java.beans` package. Please see `XMLEncoder`.

See Also:
  `BoundedRangeModel`

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`.
`protected void` | `fireStateChanged()` Runs each `ChangeListener`'s `stateChanged` method.
`ChangeListener[]` | `getChangeListeners()` Returns an array of all the change listeners registered on this `DefaultBoundedRangeModel`.
`int` | `getExtent()` Returns the model's extent.
`EventListener[]` | `getListeners(Class listenerType)` Returns an array of all the objects currently registered as `FooListener`s upon this model.
`int` | `getMaximum()` Returns the model's maximum.
`int` | `getMinimum()` Returns the model's minimum.
`int` | `getValue()` Returns 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`.
`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:
`void` | `setMaximum(int n)` Sets the maximum to n after ensuring that n that the other three properties obey the model's constraints:
`void` | `setMinimum(int n)` Sets the minimum to n after ensuring that n that the other three properties obey the model's constraints:
`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:
`void` | `setValue(int n)` Sets the current value of the model.
`void` | `setValueIsAdjusting(boolean b)` Sets the `valueIsAdjusting` property.
`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

### getValue

    public int getValue()

  Returns the model's current value.

  Specified by:
    `getValue` in interface `BoundedRangeModel`
  Returns:
    the model's current value
  See Also:
    `setValue(int)`, `BoundedRangeModel.getValue()`

### getExtent

    public int getExtent()

  Returns the model's extent.

  Specified by:
    `getExtent` in interface `BoundedRangeModel`
  Returns:
    the model's extent
  See Also:
    `setExtent(int)`, `BoundedRangeModel.getExtent()`

### getMinimum

    public int getMinimum()

  Returns the model's minimum.

  Specified by:
    `getMinimum` in interface `BoundedRangeModel`
  Returns:
    the model's minimum
  See Also:
    `setMinimum(int)`, `BoundedRangeModel.getMinimum()`

### getMaximum

    public int getMaximum()

  Returns the model's maximum.

  Specified by:
    `getMaximum` in interface `BoundedRangeModel`
  Returns:
    the model's maximum
  See Also:
    `setMaximum(int)`, `BoundedRangeModel.getMaximum()`

### 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`
  Parameters:
    `n` - the model's new value
  See Also:
    `BoundedRangeModel.setValue(int)`

### 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`
  Parameters:
    `n` - the model's new extent
  See Also:
    `BoundedRangeModel.setExtent(int)`

### 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`
  Parameters:
    `n` - the model's new minimum
  See Also:
    `getMinimum()`, `BoundedRangeModel.setMinimum(int)`

### 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`
  Parameters:
    `n` - the model's new maximum
  See Also:
    `BoundedRangeModel.setMaximum(int)`

### 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
  See Also:
    `getValueIsAdjusting()`, `setValue(int)`, `BoundedRangeModel.setValueIsAdjusting(boolean)`

### 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`
  Returns:
    the value of the `valueIsAdjusting` property
  See Also:
    `setValue(int)`, `BoundedRangeModel.getValueIsAdjusting()`

### 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`
  Parameters:
    `newValue` - an int giving the current value
    `newExtent` - an int giving the amount by which the value can "jump"
    `newMin` - an int giving the minimum value
    `newMax` - an int giving the maximum value
  See Also:
    `BoundedRangeModel.setRangeProperties(int, int, int, int, boolean)`, `setValue(int)`, `setExtent(int)`, `setMinimum(int)`, `setMaximum(int)`, `setValueIsAdjusting(boolean)`

### addChangeListener

    public void addChangeListener(ChangeListener l)

  Adds a `ChangeListener`. The change listeners are run each time any one of the Bounded Range model properties changes.

  Specified by:
    `addChangeListener` in interface `BoundedRangeModel`
  Parameters:
    `l` - the ChangeListener to add
  See Also:
    `removeChangeListener(javax.swing.event.ChangeListener)`, `BoundedRangeModel.addChangeListener(javax.swing.event.ChangeListener)`

### removeChangeListener

    public void removeChangeListener(ChangeListener l)

  Removes a `ChangeListener`.

  Specified by:
    `removeChangeListener` in interface `BoundedRangeModel`
  Parameters:
    `l` - the `ChangeListener` to remove
  See Also:
    `addChangeListener(javax.swing.event.ChangeListener)`, `BoundedRangeModel.removeChangeListener(javax.swing.event.ChangeListener)`

### getChangeListeners

    public ChangeListener[] getChangeListeners()

  Returns an array of all the change listeners registered on this `DefaultBoundedRangeModel`.

  Returns:
    all of this model's `ChangeListener`s or an empty array if no change listeners are currently registered
  Since:
    1.4
  See Also:
    `addChangeListener(javax.swing.event.ChangeListener)`, `removeChangeListener(javax.swing.event.ChangeListener)`

### fireStateChanged

    protected void fireStateChanged()

  Runs each `ChangeListener`'s `stateChanged` method.

  See Also:
    `setRangeProperties(int, int, int, int, boolean)`, `EventListenerList`

### toString

    public String toString()

  Returns a string that displays all of the `BoundedRangeModel` properties.

  Overrides:
    `toString` in class `Object`
  Returns:
    a string representation of the object.

### getListeners

    public EventListener[] getListeners(Class listenerType)

  Returns an array of all the objects currently registered as `FooListener`s upon this model. `FooListener`s are registered using the `addFooListener` method.

  You can specify the `listenerType` argument with a class literal, such as `FooListener.class`. For example, you can query a `DefaultBoundedRangeModel` instance `m` for its change listeners with the following code:

      ChangeListener[] cls = (ChangeListener[])(m.getListeners(ChangeListener.class));

  If no such listeners exist, this method returns an empty array.

  Parameters:
    `listenerType` - the type of listeners requested; this parameter should specify an interface that descends from `java.util.EventListener`
  Returns:
    an array of all objects registered as `FooListener`s on this model, or an empty array if no such listeners have been added
  Throws:
    `ClassCastException` - if `listenerType` doesn't specify a class or interface that implements `java.util.EventListener`
  Since:
    1.3
  See Also:
    `getChangeListeners()`

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Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.