ScrollBar.ScrollKnob (NASA WorldWind)

java.lang.Object
- gov.nasa.worldwind.avlist.AVListImpl
- - gov.nasa.worldwind.util.AbstractHotSpot
  - - gov.nasa.worldwind.util.tree.TreeHotSpot
    - - gov.nasa.worldwind.util.tree.DragControl
      - gov.nasa.worldwind.util.tree.ScrollBar.ScrollKnob

All Implemented Interfaces:

AVList, SelectListener, HotSpot, java.awt.event.KeyListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.event.MouseWheelListener, java.util.EventListener

Enclosing class:

ScrollBar
```
public class ScrollBar.ScrollKnob
extends DragControl
```
Control for dragging the scroll knob.

Field Summary

Fields
Modifier and Type Field Description

protected int dragRefValue

protected ScrollBar scrollBar
- Fields inherited from class gov.nasa.worldwind.util.tree.DragControl
  dragging, dragRefPoint
- Fields inherited from class gov.nasa.worldwind.util.tree.TreeHotSpot
  parent
- Fields inherited from class gov.nasa.worldwind.util.AbstractHotSpot
  active

Constructor Summary

Constructors
Constructor Description

ScrollKnob(HotSpot parent, ScrollBar owner)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`beginDrag(java.awt.Point point)`	Called when a drag begins.
`protected void`	`drag(java.awt.Point point)`	Called for each point within a drag action.
`void`	`mouseClicked(java.awt.event.MouseEvent event)`	Forwards the event to the parent HotSpot if the parent is non-null.

Methods inherited from class gov.nasa.worldwind.util.tree.DragControl
endDrag, isDragging, selected

Methods inherited from class gov.nasa.worldwind.util.tree.TreeHotSpot
mousePressed, mouseReleased, mouseWheelMoved

Methods inherited from class gov.nasa.worldwind.util.AbstractHotSpot
getCursor, isActive, isConsumed, keyPressed, keyReleased, keyTyped, mouseDragged, mouseEntered, mouseExited, mouseMoved, setActive

Methods inherited from class gov.nasa.worldwind.avlist.AVListImpl
addPropertyChangeListener, addPropertyChangeListener, clearList, copy, firePropertyChange, firePropertyChange, getBooleanValue, getBooleanValue, getChangeSupport, getDoubleValue, getDoubleValue, getEntries, getIntegerValue, getIntegerValue, getLongValue, getLongValue, getRestorableStateForAVPair, getStringValue, getStringValue, getStringValue, getValue, getValues, hasKey, removeKey, removePropertyChangeListener, removePropertyChangeListener, setValue, setValues

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - scrollBar
```
protected ScrollBar scrollBar
```
  - dragRefValue
```
protected int dragRefValue
```
- Constructor Detail
  - ScrollKnob
```
public ScrollKnob(HotSpot parent,
                  ScrollBar owner)
```
- Method Detail
  - mouseClicked
```
public void mouseClicked(java.awt.event.MouseEvent event)
```
    Description copied from class: TreeHotSpot
    
    Forwards the event to the parent HotSpot if the parent is non-null. Otherwise does nothing. Override this method to handle mouse click events.
    
    Specified by:
    
    mouseClicked in interface HotSpot
    
    Specified by:
    
    mouseClicked in interface java.awt.event.MouseListener
    
    Overrides:
    
    mouseClicked in class TreeHotSpot
    
    Parameters:
    
    event - The event to handle.
  - beginDrag
```
protected void beginDrag(java.awt.Point point)
```
    Description copied from class: DragControl
    
    Called when a drag begins. This implementation saves the first drag point to DragControl.dragRefPoint.
    
    Overrides:
    
    beginDrag in class DragControl
    
    Parameters:
    
    point - Point at which dragging started.
  - drag
```
protected void drag(java.awt.Point point)
```
    Description copied from class: DragControl
    
    Called for each point within a drag action.
    
    Specified by:
    
    drag in class DragControl
    
    Parameters:
    
    point - Current drag point.