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Chapter 21 java.awt.event Reference |
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AdjustmentEvent 
Name
AdjustmentEvent
![[Graphic: Figure from the text]](./figs/adjustm.gif)
Description
AdjustmentEvents are generated by objects that implement the Adjustable interface. Scrollbar is one example of such an object.
Class Definition
public class java.awt.event.AdjustmentEvent
extends java.awt.AWTEvent {
// Constants
public final static int ADJUSTMENT_FIRST;
public final static int ADJUSTMENT_LAST;
public final static int ADJUSTMENT_VALUE_CHANGED;
public final static int BLOCK_DECREMENT;
public final static int BLOCK_INCREMENT;
public final static int TRACK;
public final static int UNIT_DECREMENT;
public final static int UNIT_INCREMENT;
// Constructors
public AdjustmentEvent (Adjustable source, int id, int type, int value);
// Instance Methods
public Adjustable getAdjustable();
public int getAdjustmentType();
public int getValue();
public String paramString();
}
Constants
ADJUSTMENT_FIRST
public final static int ADJUSTMENT_FIRST
Specifies the beginning range of adjustment event ID values.
ADJUSTMENT_LAST
public final static int ADJUSTMENT_LAST
Specifies the ending range of adjustment event ID values.
ADJUSTMENT_VALUE_CHANGED
public final static int ADJUSTMENT_VALUE_CHANGED
Event type ID for value changed.
BLOCK_DECREMENT
public final static int BLOCK_DECREMENT
Adjustment type for block decrement.
BLOCK_INCREMENT
public final static int BLOCK_INCREMENT
Adjustment type for block increment.
TRACK
public final static int TRACK
Adjustment type for tracking.
UNIT_DECREMENT
public final static int UNIT_DECREMENT
Adjustment type for unit decrement.
UNIT_INCREMENT
public final static int UNIT_INCREMENT
Adjustment type for unit increment.
Constructors
AdjustmentEvent
public AdjustmentEvent (Adjustable source, int id, int type, int value)
- Parameters
-
- source
-
The object that generated the event.
- id
-
The event type ID of the event.
- type
-
The type of adjustment event.
- value
-
The value of the Adjustable object.
- source
- Description
-
Constructs an AdjustmentEvent with the given characteristics.
Instance Methods
getAdjustable
public Adjustable getAdjustable()
- Returns
-
The source of this event.
getAdjustmentType
public int getAdjustmentType()
- Returns
-
One of the adjustment type constants.
- Description
-
The type will be BLOCK_DECREMENT, BLOCK_INCREMENT, TRACK, UNIT_DECREMENT, or UNIT_INCREMENT.
getValue
public int getValue()
- Returns
-
The new value of the Adjustable object.
paramString
public String paramString()
- Returns
-
String with current settings of the AdjustmentEvent.
- Overrides
-
AWTEvent.paramString()
- Description
-
Helper method for toString() to generate string of current settings.
See Also
Adjustable, AdjustmentListener, AWTEvent, Scrollbar
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| ActionListener |
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AdjustmentListener |
