DragContext (NASA World Wind)

java.lang.Object
- gov.nasa.worldwind.drag.DragContext

```
public class DragContext
extends Object
```
Provides information about mouse inputs and WorldWindow state for use in dragging operations.

Field Summary

Fields
Modifier and Type	Field and Description
`protected String`	`dragState` The current drag state, which can be one of the three following values: `AVKey.DRAG_BEGIN`, `AVKey.DRAG_CHANGE`, `AVKey.DRAG_ENDED`.
`protected Globe`	`globe` The current `Globe` of the `WorldWindow`.
`protected Point`	`initialPoint` In accordance with the AWT screen coordinates the top left point of the window is the origin.
`protected Point`	`point` In accordance with the AWT screen coordinates the top left point of the window is the origin.
`protected Point`	`previousPoint` In accordance with the AWT screen coordinates the top left point of the window is the origin.
`protected SceneController`	`sceneController` The current `SceneController` of the `WorldWindow`.
`protected View`	`view` The current`View` of the `WorldWindow`.

Constructor Summary

Constructors
Constructor and Description

DragContext()
Creates a new DragContext instance.

Constructors
Constructor and Description
`DragContext()` Creates a new `DragContext` instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`getDragState()` Returns the current drag state for this drag event.
`Globe`	`getGlobe()` Returns the current `Globe` for this drag event.
`Point`	`getInitialPoint()` Returns the initial screen point with the origin at the top left corner of the window.
`Point`	`getPoint()` Returns the current screen point with the origin at the top left corner of the window.
`Point`	`getPreviousPoint()` Returns the previous screen point with the origin at the top left corner of the window.
`SceneController`	`getSceneController()` Returns the current `SceneController` for this drag event.
`View`	`getView()` Returns the current `View` for this drag event.
`void`	`setDragState(String dragState)` Set the `DragContext` drag state, which must be one of the following three states: `AVKey.DRAG_BEGIN` , `AVKey.DRAG_CHANGE`, or `AVKey.DRAG_ENDED`.
`void`	`setGlobe(Globe globe)` Set the `DragContext` `Globe`.
`void`	`setInitialPoint(Point initialPoint)` Set the `DragContext` initial screen point.
`void`	`setPoint(Point point)` Set the `DragContext` current screen point.
`void`	`setPreviousPoint(Point previousPoint)` Set the `DragContext` previous screen point.
`void`	`setSceneController(SceneController sceneController)` Set the `DragContext` `SceneController`.
`void`	`setView(View view)` Set the `DragContext` `View`.

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

- Field Detail
  - dragState
```
protected String dragState
```
    The current drag state, which can be one of the three following values: AVKey.DRAG_BEGIN, AVKey.DRAG_CHANGE, AVKey.DRAG_ENDED.
  - globe
```
protected Globe globe
```
    The current Globe of the WorldWindow.
  - initialPoint
```
protected Point initialPoint
```
    In accordance with the AWT screen coordinates the top left point of the window is the origin. This point refers to the initial point of the drag event.
  - point
```
protected Point point
```
    In accordance with the AWT screen coordinates the top left point of the window is the origin.
  - previousPoint
```
protected Point previousPoint
```
    In accordance with the AWT screen coordinates the top left point of the window is the origin. This point is the previous screen point.
  - sceneController
```
protected SceneController sceneController
```
    The current SceneController of the WorldWindow.
  - view
```
protected View view
```
    The currentView of the WorldWindow.
- Constructor Detail
  - DragContext
```
public DragContext()
```
    Creates a new DragContext instance.
- Method Detail
  - getDragState
```
public String getDragState()
```
    Returns the current drag state for this drag event.
    
    Returns:
    
    the drag state.
  - getGlobe
```
public Globe getGlobe()
```
    Returns the current Globe for this drag event.
    
    Returns:
    
    the current Globe.
  - getInitialPoint
```
public Point getInitialPoint()
```
    Returns the initial screen point with the origin at the top left corner of the window. The initial point is the screen point at the initiation of the drag event.
    
    Returns:
    
    the initial screen point.
  - getPoint
```
public Point getPoint()
```
    Returns the current screen point with the origin at the top left corner of the window.
    
    Returns:
    
    the current screen point.
  - getPreviousPoint
```
public Point getPreviousPoint()
```
    Returns the previous screen point with the origin at the top left corner of the window.
    
    Returns:
    
    the previous point.
  - getSceneController
```
public SceneController getSceneController()
```
    Returns the current SceneController for this drag event.
    
    Returns:
    
    the current SceneController.
  - getView
```
public View getView()
```
    Returns the current View for this drag event.
    
    Returns:
    
    the current View.
  - setDragState
```
public void setDragState(String dragState)
```
    Set the DragContext drag state, which must be one of the following three states: AVKey.DRAG_BEGIN , AVKey.DRAG_CHANGE, or AVKey.DRAG_ENDED.
    
    Parameters:
    
    dragState - the drag state to assign to the DragContext.
    
    Throws:
    
    IllegalArgumentException - if the drag state is null or not one of the three states defined for dragging.
  - setGlobe
```
public void setGlobe(Globe globe)
```
    Set the DragContext Globe.
    
    Parameters:
    
    globe - the Globe to assign to the DragContext.
    
    Throws:
    
    IllegalArgumentException - if the globe is null.
  - setInitialPoint
```
public void setInitialPoint(Point initialPoint)
```
    Set the DragContext initial screen point.
    
    Parameters:
    
    initialPoint - the screen point to assign to the initial screen point.
    
    Throws:
    
    IllegalArgumentException - if the initialPoint is null.
  - setPoint
```
public void setPoint(Point point)
```
    Set the DragContext current screen point.
    
    Parameters:
    
    point - the point to assign to the current screen point.
    
    Throws:
    
    IllegalArgumentException - if the point is null.
  - setPreviousPoint
```
public void setPreviousPoint(Point previousPoint)
```
    Set the DragContext previous screen point.
    
    Parameters:
    
    previousPoint - the screen point to assign to the previous screen point.
    
    Throws:
    
    IllegalArgumentException - if the previousPoint is null.
  - setSceneController
```
public void setSceneController(SceneController sceneController)
```
    Set the DragContext SceneController.
    
    Parameters:
    
    sceneController - the SceneController to assign to the DragContext.
    
    Throws:
    
    IllegalArgumentException - if the scene controller is null.
  - setView
```
public void setView(View view)
```
    Set the DragContext View.
    
    Parameters:
    
    view - the View to assign to the DragContext.
    
    Throws:
    
    IllegalArgumentException - if the view is null.

Class DragContext

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

dragState

globe

initialPoint

point

previousPoint

sceneController

view

Constructor Detail

DragContext

Method Detail

getDragState

getGlobe

getInitialPoint

getPoint

getPreviousPoint

getSceneController

getView

setDragState

setGlobe

setInitialPoint

setPoint

setPreviousPoint

setSceneController

setView