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Class EnumControl

public abstract class EnumControl
extends Control

A EnumControl provides control over a set of discrete possible values, each represented by an object. In a graphical user interface, such a control might be represented by a set of buttons, each of which chooses one value or setting. For example, a reverb control might provide several preset reverberation settings, instead of providing continuously adjustable parameters of the sort that would be represented by FloatControl objects.

Controls that provide a choice between only two settings can often be implemented instead as a BooleanControl, and controls that provide a set of values along some quantifiable dimension might be implemented instead as a FloatControl with a coarse resolution. However, a key feature of EnumControl is that the returned values are arbitrary objects, rather than numerical or boolean values. This means that each returned object can provide further information. As an example, the settings of a REVERB control are instances of ReverbType that can be queried for the parameter values used for each setting.

Since:
1.3

Nested Classes

Nested Classes
Modifier and Type Class and Description
static class  EnumControl.Type

An instance of the EnumControl.Type inner class identifies one kind of enumerated control.

Constructors

EnumControl

protected EnumControl(EnumControl.Type type,
                      Object[] values,
                      Object value)

Constructs a new enumerated control object with the given parameters.

Parameters:
type - the type of control represented this enumerated control object
values - the set of possible values for the control
value - the initial control value

Methods

setValue

public void setValue(Object value)

Sets the current value for the control. The default implementation simply sets the value as indicated. If the value indicated is not supported, an IllegalArgumentException is thrown. Some controls require that their line be open before they can be affected by setting a value.

Parameters:
value - the desired new value
Throws:
IllegalArgumentException - if the value indicated does not fall within the allowable range

getValue

public Object getValue()

Obtains this control's current value.

Returns:
the current value

getValues

public Object[] getValues()

Returns the set of possible values for this control.

Returns:
the set of possible values

toString

public String toString()

Provides a string representation of the control.

Overrides:
toString in class Control
Returns:
a string description

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Documentation extracted from Debian's OpenJDK Development Kit package.
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