gov.nasa.worldwind
Class WorldWindowGLAutoDrawable

java.lang.Object
  gov.nasa.worldwind.avlist.AVListImpl
      gov.nasa.worldwind.WWObjectImpl
          gov.nasa.worldwind.WorldWindowImpl
              gov.nasa.worldwind.WorldWindowGLAutoDrawable

All Implemented Interfaces:

AVList, MessageListener, WorldWindow, WorldWindowGLDrawable, WWObject, PropertyChangeListener, EventListener, GLEventListener

Direct Known Subclasses:

ConfiguringGLRuntimeCapabilities.MyGLAutoDrawable

public class WorldWindowGLAutoDrawable
extends WorldWindowImpl
implements WorldWindowGLDrawable, GLEventListener

A non-platform specific WorldWindow class. This class can be aggregated into platform-specific classes to provide the core functionality of World Wind.

Field Summary

static long	DEFAULT_VIEW_STOP_TIME Default time in milliseconds that the view must remain unchanged before the View.VIEW_STOPPED message is sent.
protected long	lastViewID The most recent View modelView ID.
protected ScheduledFuture	viewRefreshTask Schedule task to send the View.VIEW_STOPPED message after the view stop time elapses.
protected long	viewStopTime Time in milliseconds that the view must remain unchanged before the View.VIEW_STOPPED message is sent.

Fields inherited from class gov.nasa.worldwind.WorldWindowImpl

gpuResourceCache

Constructor Summary

WorldWindowGLAutoDrawable()
Construct a new WorldWindowGLCanvas for a specified GLDrawable.

Method Summary

protected void	checkForViewChange() Determine if the view has changed since the previous frame.
void	display(GLAutoDrawable glAutoDrawable) See GLEventListener.display(GLAutoDrawable).
void	dispose(GLAutoDrawable glAutoDrawable) See GLEventListener.init(GLAutoDrawable).
protected int	doDisplay() Performs the actual repaint.
protected void	doShutdown()
protected void	doSwapBuffers(GLAutoDrawable drawable) Performs the actual buffer swap.
void	endInitialization()
GLContext	getContext() Returns the GLContext associated with this WorldWindow.
protected String[]	getRequiredOglExtensions()
protected String[]	getRequiredOglFunctions()
long	getViewStopTime() Indicates the amount of time, in milliseconds, that the View must remain unchanged before a View.VIEW_STOPPED event is triggered.
void	init(GLAutoDrawable glAutoDrawable) See GLEventListener.init(GLAutoDrawable).
void	initDrawable(GLAutoDrawable glAutoDrawable)
void	initGpuResourceCache(GpuResourceCache cache)
protected void	initializeCreditsController()
protected boolean	isGLContextCompatible(GLContext context)
void	onMessage(Message msg) Empty implementation of MessageListener.
void	propertyChange(PropertyChangeEvent propertyChangeEvent) The property change listener for this instance.
void	redraw() Causes a repaint event to be enqueued with the window system for this world window.
void	redrawNow() Immediately repaints the world window without waiting for a window system repaint event.
protected void	reinitialize(GLAutoDrawable glAutoDrawable)
void	reshape(GLAutoDrawable glAutoDrawable, int x, int y, int w, int h) See GLEventListener.reshape(GLAutoDrawable, int, int, int, int).
protected void	scheduleViewStopTask(long delay) Schedule a task that will send a View.VIEW_STOPPED message to the Model when the task executes.
void	setViewStopTime(long time) Specifies the amount of time, in milliseconds, that the View must remain unchanged before a View.VIEW_STOPPED event is triggered.
void	shutdown() Causes resources used by the World Window to be freed.

Methods inherited from class gov.nasa.worldwind.WorldWindowImpl

addPositionListener, addRenderingExceptionListener, addRenderingListener, addSelectListener, callPositionListeners, callRenderingExceptionListeners, callRenderingListeners, callSelectListeners, createGpuResourceCache, getCurrentBoxSelection, getCurrentPosition, getCurrentSelection, getGpuResourceCache, getInputHandler, getModel, getObjectsAtCurrentPosition, getObjectsInSelectionBox, getPerFrameStatistics, getSceneController, getView, removePositionListener, removeRenderingExceptionListener, removeRenderingListener, removeSelectListener, setGpuResourceCache, setInputHandler, setModel, setModelAndView, setPerFrameStatisticsKeys, setSceneController, setView

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, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface gov.nasa.worldwind.WorldWindow

addPositionListener, addRenderingExceptionListener, addRenderingListener, addSelectListener, getCurrentPosition, getGpuResourceCache, getInputHandler, getModel, getObjectsAtCurrentPosition, getObjectsInSelectionBox, getPerFrameStatistics, getSceneController, getView, removePositionListener, removeRenderingExceptionListener, removeRenderingListener, removeSelectListener, setInputHandler, setModel, setModelAndView, setPerFrameStatisticsKeys, setSceneController, setView

Methods inherited from interface gov.nasa.worldwind.avlist.AVList

addPropertyChangeListener, addPropertyChangeListener, clearList, copy, firePropertyChange, firePropertyChange, getEntries, getStringValue, getValue, getValues, hasKey, removeKey, removePropertyChangeListener, removePropertyChangeListener, setValue, setValues

Field Detail

DEFAULT_VIEW_STOP_TIME

public static final long DEFAULT_VIEW_STOP_TIME

Default time in milliseconds that the view must remain unchanged before the View.VIEW_STOPPED message is sent.

See Also:

Constant Field Values

lastViewID

protected long lastViewID

The most recent View modelView ID.

See Also:

View.getViewStateID()

viewRefreshTask

protected ScheduledFuture viewRefreshTask

Schedule task to send the View.VIEW_STOPPED message after the view stop time elapses.

viewStopTime

protected long viewStopTime

Time in milliseconds that the view must remain unchanged before the View.VIEW_STOPPED message is sent.

Constructor Detail

WorldWindowGLAutoDrawable

public WorldWindowGLAutoDrawable()

Construct a new WorldWindowGLCanvas for a specified GLDrawable.

Method Detail

checkForViewChange

protected void checkForViewChange()

Determine if the view has changed since the previous frame. If the view has changed, schedule a task that will send a View.VIEW_STOPPED to the Model if the view does not change for viewStopTime milliseconds.

See Also:

getViewStopTime()

display

public void display(GLAutoDrawable glAutoDrawable)

See GLEventListener.display(GLAutoDrawable).

Specified by:

display in interface GLEventListener

Parameters:

glAutoDrawable - the drawable

Throws:

IllegalStateException - if no SceneController exists for this canvas

dispose

public void dispose(GLAutoDrawable glAutoDrawable)

See GLEventListener.init(GLAutoDrawable).

GLEventListener's dispose method indicates that the GL context has been released, and provides the listener an opportunity to clean up any resources. Dispose does not imply that the component's lifecycle has ended or that the application is closing. There are three cases in which dispose may be called:

• The WorldWindow is removed from its parent component.
• The WorldWindow's parent frame is closed.
• The application calls either GLCanvas.dispose or GLJPanel.dispose.

This implementation is left empty. In the case when a WorldWindow or a World Wind application has reached its end of life, its resources should be released by calling WorldWindow.shutdown() or WorldWind.shutDown(), respectively. In the case when a WorldWindow is removed from its parent frame or that frame is closed without a call to shutdown, it is assumed that the application intends to reuse the WorldWindow. Resources associated with the previous GL context are released in the subsequent call to init.

Specified by:

dispose in interface GLEventListener

Parameters:

glAutoDrawable - the drawable

doDisplay

protected int doDisplay()

Performs the actual repaint. Provided so that subclasses may override the repaint steps.

Returns:

if greater than zero, the window should be automatically repainted again at the indicated number of milliseconds from this method's return.

doShutdown

protected void doShutdown()

doSwapBuffers

protected void doSwapBuffers(GLAutoDrawable drawable)

Performs the actual buffer swap. Provided so that subclasses may override the swap steps.

Parameters:

drawable - the window's associated drawable.

endInitialization

public void endInitialization()

Specified by:

endInitialization in interface WorldWindowGLDrawable

getContext

public GLContext getContext()

Description copied from interface: WorldWindow

Returns the GLContext associated with this WorldWindow.

Specified by:

getContext in interface WorldWindow

Returns:

the GLContext associated with this window. May be null.

getRequiredOglExtensions

protected String[] getRequiredOglExtensions()

getRequiredOglFunctions

protected String[] getRequiredOglFunctions()

getViewStopTime

public long getViewStopTime()

Indicates the amount of time, in milliseconds, that the View must remain unchanged before a View.VIEW_STOPPED event is triggered.

Returns:

Time in milliseconds that the View must must remain unchanged before the view stopped event is triggered.

init

public void init(GLAutoDrawable glAutoDrawable)

See GLEventListener.init(GLAutoDrawable).

Specified by:

init in interface GLEventListener

Parameters:

glAutoDrawable - the drawable

initDrawable

public void initDrawable(GLAutoDrawable glAutoDrawable)

Specified by:

initDrawable in interface WorldWindowGLDrawable

initGpuResourceCache

public void initGpuResourceCache(GpuResourceCache cache)

Specified by:

initGpuResourceCache in interface WorldWindowGLDrawable

initializeCreditsController

protected void initializeCreditsController()

isGLContextCompatible

protected boolean isGLContextCompatible(GLContext context)

onMessage

public void onMessage(Message msg)

Empty implementation of MessageListener.

Forward the message event to the Model for distribution to the layers.

Specified by:

onMessage in interface MessageListener

Overrides:

onMessage in class WWObjectImpl

Parameters:

msg - Message event.

propertyChange

public void propertyChange(PropertyChangeEvent propertyChangeEvent)

Description copied from class: WWObjectImpl

The property change listener for this instance. Receives property change notifications that this instance has registered with other property change notifiers.

Specified by:

propertyChange in interface PropertyChangeListener

Overrides:

propertyChange in class WWObjectImpl

Parameters:

propertyChangeEvent - the event

redraw

public void redraw()

Description copied from interface: WorldWindow

Causes a repaint event to be enqueued with the window system for this world window. The repaint will occur at the window system's discretion, within the window system toolkit's event loop, and on the thread of that loop. This is the preferred method for requesting a repaint of the world window.

Specified by:

redraw in interface WorldWindow

Overrides:

redraw in class WorldWindowImpl

redrawNow

public void redrawNow()

Description copied from interface: WorldWindow

Immediately repaints the world window without waiting for a window system repaint event. This is not the preferred way to cause a repaint, but is provided for the rare cases that require it.

Specified by:

redrawNow in interface WorldWindow

Overrides:

redrawNow in class WorldWindowImpl

reinitialize

protected void reinitialize(GLAutoDrawable glAutoDrawable)

reshape

public void reshape(GLAutoDrawable glAutoDrawable,
                    int x,
                    int y,
                    int w,
                    int h)

See GLEventListener.reshape(GLAutoDrawable, int, int, int, int).

Specified by:

reshape in interface GLEventListener

Parameters:

glAutoDrawable - the drawable

scheduleViewStopTask

protected void scheduleViewStopTask(long delay)

Schedule a task that will send a View.VIEW_STOPPED message to the Model when the task executes. If the task runs (is not cancelled), then the view is considered stopped. Only one view stop task is scheduled at a time. If this method is called again before the task executes, the task will be cancelled and a new task scheduled.

Parameters:

delay - Delay in milliseconds until the task runs.

setViewStopTime

public void setViewStopTime(long time)

Specifies the amount of time, in milliseconds, that the View must remain unchanged before a View.VIEW_STOPPED event is triggered.

Parameters:

time - Time in milliseconds that the View must must remain unchanged before the view stopped event is triggered.

shutdown

public void shutdown()

Description copied from class: WorldWindowImpl

Causes resources used by the World Window to be freed. The World Window cannot be used once this method is called. An OpenGL context for the window must be current.

Specified by:

shutdown in interface WorldWindow

Overrides:

shutdown in class WorldWindowImpl