Полезная информация

Java AWT

Previous Chapter 19
java.awt Reference
Next
 

Adjustable (New)

Name

Adjustable (New)

[Graphic: Figure from the text]

Description

The Adjustable interface is useful for scrollbars, sliders, dials, and other components that have an adjustable numeric value. Classes that implement the Adjustable interface should send AdjustmentEvent objects to listeners that have registered via addAdjustmentListener(AdjustmentListener).

Interface Definition

public abstract interface java.awt.Adjustable {
  // Constants
  public final static int HORIZONTAL = 0;
  public final static int VERTICAL = 1;
  
  // Interface Methods
  public abstract void addAdjustmentListener (AdjustmentListener l);
  public abstract int getBlockIncrement();
  public abstract int getMaximum();
  public abstract int getMinimum();
  public abstract int getOrientation();
  public abstract int getUnitIncrement();
  public abstract int getValue();
  public abstract int getVisibleAmount();
  public abstract void removeAdjustmentListener (AdjustmentListener l);
  public abstract void setBlockIncrement (int b);
  public abstract void setMaximum (int max);
  public abstract void setMinimum (int min);
  public abstract void setUnitIncrement (int u);
  public abstract void setValue (int v);
  public abstract void setVisibleAmount (int v);
}

Constants

HORIZONTAL

public static final int HORIZONTAL

A constant representing horizontal orientation.

VERTICAL

public static final int VERTICAL

A constant representing vertical orientation.

Interface Methods

addAdjustmentListener

public abstract void addAdjustmentListener (ActionListener l)

Parameters

l

An object that implements the AdjustmentListener interface.

Description

Add a listener for adjustment event.

getBlockIncrement

public abstract int getBlockIncrement()

Returns

The amount to scroll when a paging area is selected.

getMaximum

public abstract int getMaximum()

Returns

The maximum value that the Adjustable object can take.

getMinimum

public abstract int getMinimum()

Returns

The minimum value that the Adjustable object can take.

getOrientation

public abstract int getOrientation()

Returns

A value representing the direction of the Adjustable object.

getUnitIncrement

public abstract int getUnitIncrement()

Returns

The unit amount to scroll.

getValue

public abstract int getValue()

Returns

The current setting for the Adjustable object.

getVisibleAmount

public abstract int getVisibleAmount()

Returns

The current visible setting (i.e., size) for the Adjustable object.

removeAdjustmentListener

public abstract void removeAdjustmentListener (AdjustmentListener l)

Parameters

l

One of the object's AdjustmentListeners.

Description

Remove an adjustment event listener.

setBlockIncrement

public abstract void setBlockIncrement (int b)

Parameters

b

New block increment amount.

Description

Changes the block increment amount for the Adjustable object.

setMaximum

public abstract void setMaximum (int max)

Parameters

max

New maximum value.

Description

Changes the maximum value for the Adjustable object.

setMinimum

public abstract void setMinimum (int min)

Parameters

min

New minimum value.

Description

Changes the minimum value for the Adjustable object.

setUnitIncrement

public abstract void setUnitIncrement (int u)

Parameters

u

New unit increment amount.

Description

Changes the unit increment amount for the Adjustable object.

setValue

public abstract void setValue (int v)

Parameters

v

New value.

Description

Changes the current value of the Adjustable object.

setVisibleAmount

public abstract void setVisibleAmount (int v)

Parameters

v

New amount visible.

Description

Changes the current visible amount of the Adjustable object.

See Also

AdjustmentEvent, AdjustmentListener, Scrollbar


Previous Home Next
AWTException Book Index BorderLayout

Java in a Nutshell Java Language Reference Java AWT Java Fundamental Classes Exploring Java