prajna.geo

Class GoogleGeoCanvas

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

prajna.geo.GeoCanvas

prajna.geo.GoogleGeoCanvas

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, GeoDisplay

public class GoogleGeoCanvas
extends GeoCanvas

Extension of a GeoCanvas which adds GoogleMaps as a background. This allows plotting other Geographic data over a Google map, enabling a synthesis of Google Maps and other geographic products. The GoogleGeoCanvas will actually transform the images which compose the Google map, scaling them to arbitrary sizes to fit the desired mapping parameters. This class does not yet support projections other than Mercator projection.

Author:

Edward Swing

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

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 java.awt.image.ImageObserver

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

Constructor Summary

Constructors

Constructor and Description
GoogleGeoCanvas() Instantiates a new GoogleGeoCanvas.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getUrlBase() Gets the Google Maps URL base.
protected void	paintGeoLayers(java.awt.Graphics2D g2) Paint the geographic layers.
protected void	processComponentEvent(java.awt.event.ComponentEvent event) This method processes any resize event.
void	setGeoBounds(GeoBounds geoBounds) Set the geographic bounds.
void	setProjection(Projection proj) Overrides GeoCanvas.setProjection to prevent the projection from changing.
void	setUrlBase(java.lang.String url) Sets the the Google Maps URL base.

Methods inherited from class prajna.geo.GeoCanvas

addLayer, addShape, addShapes, clearShapes, findLayer, getBackgroundImage, getGeoBounds, getLayers, getProjection, getShapeAt, getWorldColor, paintComponent, setBackgroundImage, setLayers, setWorldColor

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, 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, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintImmediately, paintImmediately, paramString, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, 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, setVisible, 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, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, 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, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, 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, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Constructor Detail

GoogleGeoCanvas

public GoogleGeoCanvas()

Instantiates a new GoogleGeoCanvas. The GeoCanvas world color is set to null, to prevent it from filling over the Google map backdrop. The projection is set to Mercator projection.

Method Detail

getUrlBase

public java.lang.String getUrlBase()

Gets the Google Maps URL base. This is the base URL which points to the Google Maps instance.

Returns:

the urlBase

paintGeoLayers

protected void paintGeoLayers(java.awt.Graphics2D g2)

Paint the geographic layers. This method retrieves the visible cells from the Google Maps server, and displays them within the canvas. The algorithm scales the images to fit the desired size, so maps can be displayed with an arbitrary scale. This method then calls the superclass paintGeoLayers method to draw all other geographic layers.

Overrides:

paintGeoLayers in class GeoCanvas

Parameters:

g2 - the graphics context to use for painting

processComponentEvent

protected void processComponentEvent(java.awt.event.ComponentEvent event)

This method processes any resize event. It is visible as an implementation side-effect.

Overrides:

processComponentEvent in class java.awt.Component

Parameters:

event - the component event

setGeoBounds

public void setGeoBounds(GeoBounds geoBounds)

Set the geographic bounds. This method recalculates the map level based upon the new bounds.

Specified by:

setGeoBounds in interface GeoDisplay

Overrides:

setGeoBounds in class GeoCanvas

Parameters:

geoBounds - the geographic bounds

setProjection

public void setProjection(Projection proj)

Overrides GeoCanvas.setProjection to prevent the projection from changing. The Google images are Mercator projection, therefore we want to retain that projection.

Specified by:

setProjection in interface GeoDisplay

Overrides:

setProjection in class GeoCanvas

Parameters:

proj - the projection. Ignored

setUrlBase

public void setUrlBase(java.lang.String url)

Sets the the Google Maps URL base. This is the base URL which points to the Google Maps instance. The default value points to the public Google Maps URL.

Parameters:

url - the Google Maps URL base