com.bbn.openmap.layer.imageTile
Class MapTileLayer

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              com.bbn.openmap.Layer
                  com.bbn.openmap.layer.OMGraphicHandlerLayer
                      com.bbn.openmap.layer.imageTile.MapTileLayer

All Implemented Interfaces:

MapTileRequester, ProjectionListener, GestureResponsePolicy, OMGraphicHandler, ProjectionPainter, PropertyConsumer, java.awt.event.ActionListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.beans.beancontext.BeanContextChild, java.beans.beancontext.BeanContextMembershipListener, java.io.Serializable, java.util.EventListener

public class MapTileLayer
extends OMGraphicHandlerLayer
implements MapTileRequester

A Layer that uses a MapTileFactory to display information (tiles) on the map. Properties for this layer look like this:

 
 tiles.class=com.bbn.openmap.layer.imageTile.MapTileLayer
 tiles.prettyName=TILES
 tiles.tileFactory=com.bbn.openmap.dataAccess.mapTile.StandardMapTileFactory
 tiles.rootDir=root_directory_of_tiles
 #optional, .png is default
 tiles.fileExt=.png
 tiles.cacheSize=the number of mapTiles the factory should hold on to. The default is 100.
 # transform for naming convention of tiles default is OSMMapTileCoordinateTransform, but it depends on the source of tiles.  GDAL is TSMMapTileCoordinateTransform
 tiles.mapTileTransform=com.bbn.openmap.dataAccess.mapTile.OSMMapTileCoordinateTransform, or com.bbn.openmap.dataAccess.mapTile.TMSMapTileCoordinateTransform
 
 

You can use a server that provides image tiles:

 
 tiles.class=com.bbn.openmap.layer.imageTile.MapTileLayer
 tiles.prettyName=TILES
 tiles.tileFactory=com.bbn.openmap.dataAccess.mapTile.ServerMapTileFactory
 tiles.rootDir=URL root directory of tiles
 # a local location to cache tiles, to reduce load on server.
 tiles.localCacheRootDir=/data/tiles/osmtiles
 # save cache when layer is done (true by default)
 tiles.saveCache=true
 
 # other properties are the same.
 tiles.fileExt=.png
 tiles.cacheSize=the number of mapTiles the factory should hold on to. The default is 100.
 # transform for naming convention of tiles default is OSMMapTileCoordinateTransform, but it depends on the source of tiles.  GDAL is TSMMapTileCoordinateTransform
 mapTileTransform=com.bbn.openmap.dataAccess.mapTile.OSMMapTileCoordinateTransform, or com.bbn.openmap.dataAccess.mapTile.TMSMapTileCoordinateTransform
 
 

The rootDir property can be defined as a pattern, with the zoom level z, x tile coordinate and y tile coordinate set using {z}{x}{y} for however the tiles are stored or retrieved:

 rootDir=/data/tiles/{z}/{x}/{y}.png
 
 #or, for the ServerMapTileFactory:
 rootDir=http://someserver.com/tileset/{z}/{x}/{y}.png
 
 

In this case, the fileExt won't be used as the code will assume you are setting that. To make things simpler, you can define a tiles.omp file that sits under the tile root directory or at the top level of the jar file, and let it specify the properties for the tile set. The properties in that file should be unscoped:

 
 fileExt=.png
 #for instance, for GDAL processed images you need this transform since tiles have difference reference coordinates
 mapTileTransform=com.bbn.openmap.dataAccess.mapTile.TMSMapTileCoordinateTransform
 #in jar file, should specify rootDir inside jar to tiles (don't need this for layers accessing local file system rootDirs, unless you want to specify z,x,y order differently):
 rootDir=mytiles
 
 #optional
 attribution=map data 2013 OpenStreetMap
 
 

If you do this last configuration, all you need to define is rootDir (and prettyName, class) property for layer, and then define all other props with data.

Author:

dietrick

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

protected java.lang.String	attribution Attribution for the map data.
protected DrawingAttributes	attributionAttributes Rendering parameters for attribution string.
static java.lang.String	DATA_ATTRIBUTION_PROPERTY A property to set for displaying attribution for the data used by the layer.
static java.lang.String	INCREMENTAL_UPDATES_PROPERTY Property to allow the MapTileFactory to call repaint on this layer as map tiles become available.
protected boolean	incrementalUpdates Flag to allow this layer to set itself as a repaint callback object on the tile factory.
static java.util.logging.Logger	logger
static java.lang.String	SAVE_CACHE_PROPERTY A property to save or destroy the tile factory cache when the layer is removed.
protected boolean	saveCache Flag to save tile factory cache when the layer is no longer used.
static java.lang.String	TILE_FACTORY_CLASS_PROPERTY Property that sets the class name of the MapTileFactory to use for this layer.
protected MapTileFactory	tileFactory The MapTileFactory that knows how to fetch image files and create OMRasters for them.
static java.lang.String	ZOOM_LEVEL_PROPERTY A property to set if you want to force the layer to use tiles of a certain zoom level.
protected int	zoomLevel The zoomLevel to use when requesting tiles from the MapTileFactory.

Fields inherited from class com.bbn.openmap.layer.OMGraphicHandlerLayer

consumeEvents, ConsumeEventsProperty, filter, interruptable, InterruptableProperty, layerWorker, LAYERWORKER_LOCK, layerWorkerQueue, mouseEventInterpreter, mouseModeIDs, MouseModesProperty, projectionChangePolicy, ProjectionChangePolicyProperty, renderPolicy, RenderPolicyProperty, selectedList, TransparencyProperty

Fields inherited from class com.bbn.openmap.Layer

addAsBackground, AddAsBackgroundProperty, addToBeanContext, AddToBeanContextProperty, attributes, autoPalette, AutoPaletteProperty, beanContextChildSupport, coordTransform, DataPathPrefixProperty, DisplayPaletteCmd, DisplayPropertiesCmd, doHack, HidePaletteCmd, i18n, localHackList, maxScale, MaxScaleProperty, minScale, MinScaleProperty, palette, paletteListener, PrettyNameProperty, propertyPrefix, readyToPaint, RedrawCmd, removable, RemovableProperty, SWING_PACKAGE, TransformProperty, windowSupport

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface com.bbn.openmap.PropertyConsumer

EditorProperty, initPropertiesProperty, LabelEditorProperty, ScopedEditorProperty

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

MapTileLayer()

MapTileLayer(MapTileFactory tileFactory)

Method Summary

void	clearCache() Clear the MapTileFactory cache.
java.lang.String	getAttribution()
DrawingAttributes	getAttributionAttributes()
protected OMText	getAttributionGraphic()
java.awt.Component	getGUI() Gets the gui controls associated with the layer.
java.util.Properties	getProperties(java.util.Properties props) Overrides Layer getProperties method., also calls that method on Layer.
java.util.Properties	getPropertyInfo(java.util.Properties props) Overrides Layer getProperties method., also calls that method on Layer.
MapTileFactory	getTileFactory()
java.lang.String	getToolTipTextFor(OMGraphic omg) If applicable, should return a tool tip for the OMGraphic.
int	getZoomLevel()
boolean	isIncrementalUpdates()
void	listUpdated() Called when the provided OMGraphicList has another tile added to it, so the list can be repainted if the caller is interested in incremental updates.
void	paint(java.awt.Graphics g) The default action is to get the OMGraphicList and render it.
OMGraphicList	prepare() OMGraphicHandlerLayer method, called with projection changes or whenever else doPrepare() is called.
void	removed(java.awt.Container cont) Called when the layer has been turned off and the projection changes, signifying that the layer can clean up.
void	setAttribution(java.lang.String attribution)
void	setAttributionAttributes(DrawingAttributes attributionAttributes)
void	setIncrementalUpdates(boolean incrementalUpdates)
void	setProperties(java.lang.String prefix, java.util.Properties props) Overrides the Layer setProperties method.
void	setTileFactory(MapTileFactory tileFactory)
void	setZoomLevel(int zoomLevel)
boolean	shouldContinue() Asked by the MapTileFactory if the tile fetching should continue.

Methods inherited from class com.bbn.openmap.layer.OMGraphicHandlerLayer

actionPerformed, canSetList, copy, createLayerWorker, cut, deselect, dispose, doAction, doPrepare, filter, filter, filter, getConsumeEvents, getDefaultSettingsPanel, getFilter, getInfoText, getItemsForMapMenu, getItemsForOMGraphicMenu, getLayerWorker, getList, getMapMouseListener, getMouseEventInterpreter, getMouseModeIDsForEvents, getProjectionChangePolicy, getRedrawButton, getRenderPolicy, getSelected, getSettingsButton, getTransparency, getTransparencyAdjustmentPanel, highlight, isCancelled, isHighlightable, isInterruptable, isSelectable, isWorking, leftClick, mouseOver, paste, projectionChanged, receivesMapEvents, renderDataForProjection, resetFiltering, select, setConsumeEvents, setFilter, setInterruptable, setLayerWorker, setList, setMouseEventInterpreter, setMouseModeIDsForEvents, setProjectionChangePolicy, setRenderPolicy, setTransparency, supportsSQL, unhighlight, workerComplete

Methods inherited from class com.bbn.openmap.Layer

addComponentListener, added, addInfoDisplayListener, addLayerStatusListener, addMouseListener, addVetoableChangeListener, childrenAdded, childrenRemoved, clearListeners, connectToBeanContext, createWindowSupport, disconnectFromBeanContext, finalize, findAndInit, findAndInit, findAndUndo, fireHideToolTip, firePaletteEvent, fireRequestBrowserContent, fireRequestBrowserContent, fireRequestCursor, fireRequestInfoLine, fireRequestInfoLine, fireRequestInfoLine, fireRequestMessage, fireRequestMessage, fireRequestToolTip, fireRequestToolTip, fireRequestURL, fireRequestURL, fireStatusUpdate, fireStatusUpdate, fireVetoableChange, getAddAsBackground, getAddToBeanContext, getAttribute, getBeanContext, getCoordTransform, getIcon, getMaxScale, getMinScale, getPackage, getPalette, getProjection, getPropertyPrefix, getWindowSupport, hasGUI, hidePalette, isAutoPalette, isProjectionOK, isReadyToPaint, isRemovable, notifyHideHack, prependDataPathPrefix, putAttribute, removeComponentListener, removeConfirmed, removeInfoDisplayListener, removeLayerStatusListener, removeVetoableChangeListener, repaint, resetPalette, setAddAsBackground, setAddToBeanContext, setAutoPalette, setBeanContext, setCoordTransform, setIcon, setLayerProperties, setMaxScale, setMinScale, setName, setPaletteVisible, setProjection, setProjection, setProperties, setPropertyPrefix, setReadyToPaint, setRemovable, setVisible, setWindowSupport, showPalette

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, paramString, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, unregisterKeyboardAction, update, updateUI

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.beans.beancontext.BeanContextChild

addPropertyChangeListener, removePropertyChangeListener

Field Detail

logger

public static java.util.logging.Logger logger

TILE_FACTORY_CLASS_PROPERTY

public static final java.lang.String TILE_FACTORY_CLASS_PROPERTY

Property that sets the class name of the MapTileFactory to use for this layer.

See Also:

Constant Field Values

INCREMENTAL_UPDATES_PROPERTY

public static final java.lang.String INCREMENTAL_UPDATES_PROPERTY

Property to allow the MapTileFactory to call repaint on this layer as map tiles become available. Default is false, enabling it will not allow this layer to be used with an ImageServer (renderDataForProjection won't work).

See Also:

Constant Field Values

ZOOM_LEVEL_PROPERTY

public static final java.lang.String ZOOM_LEVEL_PROPERTY

A property to set if you want to force the layer to use tiles of a certain zoom level.

See Also:

Constant Field Values

DATA_ATTRIBUTION_PROPERTY

public static final java.lang.String DATA_ATTRIBUTION_PROPERTY

A property to set for displaying attribution for the data used by the layer.

See Also:

Constant Field Values

SAVE_CACHE_PROPERTY

public static final java.lang.String SAVE_CACHE_PROPERTY

A property to save or destroy the tile factory cache when the layer is removed.

See Also:

Constant Field Values

tileFactory

protected MapTileFactory tileFactory

The MapTileFactory that knows how to fetch image files and create OMRasters for them.

incrementalUpdates

protected boolean incrementalUpdates

Flag to allow this layer to set itself as a repaint callback object on the tile factory.

zoomLevel

protected int zoomLevel

The zoomLevel to use when requesting tiles from the MapTileFactory. Is -1 for default, which lets the factory choose the zoom level based on the current scale setting. You can choose 1-20 if you want to force the layer to use something else.

attribution

protected java.lang.String attribution

Attribution for the map data. If it exists, it will be displayed on the lower left corner of the map.

saveCache

protected boolean saveCache

Flag to save tile factory cache when the layer is no longer used.

attributionAttributes

protected DrawingAttributes attributionAttributes

Rendering parameters for attribution string.

Constructor Detail

MapTileLayer

public MapTileLayer()

MapTileLayer

public MapTileLayer(MapTileFactory tileFactory)

Method Detail

prepare

public OMGraphicList prepare()

OMGraphicHandlerLayer method, called with projection changes or whenever else doPrepare() is called. Calls getTiles on the map tile factory.

Overrides:

prepare in class OMGraphicHandlerLayer

Returns:

OMGraphicList that contains tiles to be displayed for the current projection.

paint

public void paint(java.awt.Graphics g)

Description copied from class: OMGraphicHandlerLayer

The default action is to get the OMGraphicList and render it.

Overrides:

paint in class OMGraphicHandlerLayer

Parameters:

g - java.awt.Graphics object to render OMGraphics into.

getAttributionGraphic

protected OMText getAttributionGraphic()

Returns:

OMText for attribution text

getToolTipTextFor

public java.lang.String getToolTipTextFor(OMGraphic omg)

Description copied from class: OMGraphicHandlerLayer

If applicable, should return a tool tip for the OMGraphic. Return null if nothing should be shown.

Specified by:

getToolTipTextFor in interface GestureResponsePolicy

Overrides:

getToolTipTextFor in class OMGraphicHandlerLayer

setProperties

public void setProperties(java.lang.String prefix,
                          java.util.Properties props)

Description copied from class: OMGraphicHandlerLayer

Overrides the Layer setProperties method. Also calls Layer's version. If the ProjectionChangePolicy and RenderPolicy objects are set programmatically, are PropertyConsumers and the .class property is not set, they will still have access to properties if this method is called. Their property prefix will be scoped as if the OMGraphicHandlerLayer had them created, with their prefix being prefix + . + PropertyChangePolicyProperty and prefix + . + RenderPolicyProperty. If the .class property is set, then a new policy object will be created and replace the one set before this method is called.

Specified by:

setProperties in interface PropertyConsumer

Overrides:

setProperties in class OMGraphicHandlerLayer

Parameters:

prefix - the token to prefix the property names

props - the Properties object

getProperties

public java.util.Properties getProperties(java.util.Properties props)

Description copied from class: OMGraphicHandlerLayer

Overrides Layer getProperties method., also calls that method on Layer. Sets the properties from the policy objects used by this OMGraphicHandler layer.

Specified by:

getProperties in interface PropertyConsumer

Overrides:

getProperties in class OMGraphicHandlerLayer

Parameters:

props - a Properties object to load the PropertyConsumer properties into. If props equals null, then a new Properties object should be created.

Returns:

Properties object containing PropertyConsumer property values. If getList was not null, this should equal getList. Otherwise, it should be the Properties object created by the PropertyConsumer.

getPropertyInfo

public java.util.Properties getPropertyInfo(java.util.Properties props)

Description copied from class: OMGraphicHandlerLayer

Overrides Layer getProperties method., also calls that method on Layer. Sets the properties from the policy objects used by this OMGraphicHandler layer.

Specified by:

getPropertyInfo in interface PropertyConsumer

Overrides:

getPropertyInfo in class OMGraphicHandlerLayer

Parameters:

props - a Properties object to load the PropertyConsumer properties into. If getList equals null, then a new Properties object should be created.

Returns:

Properties object containing PropertyConsumer property values. If getList was not null, this should equal getList. Otherwise, it should be the Properties object created by the PropertyConsumer.

removed

public void removed(java.awt.Container cont)

Called when the layer has been turned off and the projection changes, signifying that the layer can clean up.

Overrides:

removed in class Layer

Parameters:

cont - Container

getTileFactory

public MapTileFactory getTileFactory()

setTileFactory

public void setTileFactory(MapTileFactory tileFactory)

isIncrementalUpdates

public boolean isIncrementalUpdates()

setIncrementalUpdates

public void setIncrementalUpdates(boolean incrementalUpdates)

getZoomLevel

public int getZoomLevel()

setZoomLevel

public void setZoomLevel(int zoomLevel)

getGUI

public java.awt.Component getGUI()

Description copied from class: Layer

Gets the gui controls associated with the layer. This default implementation returns null indicating that the layer has no gui controls.

Overrides:

getGUI in class Layer

Returns:

java.awt.Component or null, null by default.

getAttribution

public java.lang.String getAttribution()

Returns:

the attribution

setAttribution

public void setAttribution(java.lang.String attribution)

Parameters:

attribution - the attribution to set

getAttributionAttributes

public DrawingAttributes getAttributionAttributes()

Returns:

the attributionAttributes

setAttributionAttributes

public void setAttributionAttributes(DrawingAttributes attributionAttributes)

Parameters:

attributionAttributes - the attributionAttributes to set

shouldContinue

public boolean shouldContinue()

Description copied from interface: MapTileRequester

Asked by the MapTileFactory if the tile fetching should continue. Called during stable times, just to make sure that the currently fetched tile set is still wanted. Safe to always return true, but if you want the TileFactory to forget what it's doing (like the projection changed), then return false;

Specified by:

shouldContinue in interface MapTileRequester

Returns:

true of the MapTileFactory should keep collecting tiles for the current request.

listUpdated

public void listUpdated()

Description copied from interface: MapTileRequester

Called when the provided OMGraphicList has another tile added to it, so the list can be repainted if the caller is interested in incremental updates.

Specified by:

listUpdated in interface MapTileRequester

clearCache

public void clearCache()

Clear the MapTileFactory cache.