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package javax.sound.sampled;
A BooleanControl provides the ability to switch between
two possible settings that affect a line's audio. The settings are boolean
values (true and false). A graphical user interface
might represent the control by a two-state button, an on/off switch, two
mutually exclusive buttons, or a checkbox (among other possibilities).
For example, depressing a button might activate a
MUTE
As with other Control
Author: Kara Kytle Since: 1.3
/**
* A <code>BooleanControl</code> provides the ability to switch between
* two possible settings that affect a line's audio. The settings are boolean
* values (<code>true</code> and <code>false</code>). A graphical user interface
* might represent the control by a two-state button, an on/off switch, two
* mutually exclusive buttons, or a checkbox (among other possibilities).
* For example, depressing a button might activate a
* <code>{@link BooleanControl.Type#MUTE MUTE}</code> control to silence
* the line's audio.
* <p>
* As with other <code>{@link Control}</code> subclasses, a method is
* provided that returns string labels for the values, suitable for
* display in the user interface.
*
* @author Kara Kytle
* @since 1.3
*/
public abstract class BooleanControl extends Control {
// INSTANCE VARIABLES
The true state label, such as "true" or "on."
/**
* The <code>true</code> state label, such as "true" or "on."
*/
private final String trueStateLabel;
The false state label, such as "false" or "off."
/**
* The <code>false</code> state label, such as "false" or "off."
*/
private final String falseStateLabel;
The current value.
/**
* The current value.
*/
private boolean value;
// CONSTRUCTORS
Constructs a new boolean control object with the given parameters.
Params: - type – the type of control represented this float control object
- initialValue – the initial control value
- trueStateLabel – the label for the state represented by
true,
such as "true" or "on." - falseStateLabel – the label for the state represented by
false,
such as "false" or "off."
/**
* Constructs a new boolean control object with the given parameters.
*
* @param type the type of control represented this float control object
* @param initialValue the initial control value
* @param trueStateLabel the label for the state represented by <code>true</code>,
* such as "true" or "on."
* @param falseStateLabel the label for the state represented by <code>false</code>,
* such as "false" or "off."
*/
protected BooleanControl(Type type, boolean initialValue, String trueStateLabel, String falseStateLabel) {
super(type);
this.value = initialValue;
this.trueStateLabel = trueStateLabel;
this.falseStateLabel = falseStateLabel;
}
Constructs a new boolean control object with the given parameters.
The labels for the true and false states
default to "true" and "false."
Params: - type – the type of control represented by this float control object
- initialValue – the initial control value
/**
* Constructs a new boolean control object with the given parameters.
* The labels for the <code>true</code> and <code>false</code> states
* default to "true" and "false."
*
* @param type the type of control represented by this float control object
* @param initialValue the initial control value
*/
protected BooleanControl(Type type, boolean initialValue) {
this(type, initialValue, "true", "false");
}
// METHODS
Sets the current value for the control. The default
implementation simply sets the value as indicated.
Some controls require that their line be open before they can be affected
by setting a value.
Params: - value – desired new value.
/**
* Sets the current value for the control. The default
* implementation simply sets the value as indicated.
* Some controls require that their line be open before they can be affected
* by setting a value.
* @param value desired new value.
*/
public void setValue(boolean value) {
this.value = value;
}
Obtains this control's current value.
Returns: current value.
/**
* Obtains this control's current value.
* @return current value.
*/
public boolean getValue() {
return value;
}
Obtains the label for the specified state.
Returns: the label for the specified state, such as "true" or "on"
for true, or "false" or "off" for false.
/**
* Obtains the label for the specified state.
* @return the label for the specified state, such as "true" or "on"
* for <code>true</code>, or "false" or "off" for <code>false</code>.
*/
public String getStateLabel(boolean state) {
return ((state == true) ? trueStateLabel : falseStateLabel);
}
// ABSTRACT METHOD IMPLEMENTATIONS: CONTROL
Provides a string representation of the control
Returns: a string description
/**
* Provides a string representation of the control
* @return a string description
*/
public String toString() {
return new String(super.toString() + " with current value: " + getStateLabel(getValue()));
}
// INNER CLASSES
An instance of the BooleanControl.Type class identifies one kind of
boolean control. Static instances are provided for the
common types.
Author: Kara Kytle Since: 1.3
/**
* An instance of the <code>BooleanControl.Type</code> class identifies one kind of
* boolean control. Static instances are provided for the
* common types.
*
* @author Kara Kytle
* @since 1.3
*/
public static class Type extends Control.Type {
// TYPE DEFINES
Represents a control for the mute status of a line.
Note that mute status does not affect gain.
/**
* Represents a control for the mute status of a line.
* Note that mute status does not affect gain.
*/
public static final Type MUTE = new Type("Mute");
Represents a control for whether reverberation is applied
to a line. Note that the status of this control not affect
the reverberation settings for a line, but does affect whether
these settings are used.
/**
* Represents a control for whether reverberation is applied
* to a line. Note that the status of this control not affect
* the reverberation settings for a line, but does affect whether
* these settings are used.
*/
public static final Type APPLY_REVERB = new Type("Apply Reverb");
// CONSTRUCTOR
Constructs a new boolean control type.
Params: - name – the name of the new boolean control type
/**
* Constructs a new boolean control type.
* @param name the name of the new boolean control type
*/
protected Type(String name) {
super(name);
}
} // class Type
}