gov.nasa.worldwind.layers

Class CrosshairLayer

java.lang.Object

gov.nasa.worldwind.avlist.AVListImpl

gov.nasa.worldwind.WWObjectImpl

gov.nasa.worldwind.layers.AbstractLayer

gov.nasa.worldwind.layers.CrosshairLayer

All Implemented Interfaces:

AVList, Disposable, MessageListener, Layer, Restorable, WWObject, PropertyChangeListener, EventListener

public class CrosshairLayer
extends AbstractLayer

Renders a crosshair icon in the viewport center or at a specified location.

Constructor Summary

Constructors

Constructor and Description
CrosshairLayer()
CrosshairLayer(String iconFilePath)

Method Summary

Modifier and Type	Method and Description
protected void	doRender(DrawContext dc)
String	getIconFilePath() Returns the layer's current icon file path.
double	getIconScale() Returns the icon scale factor.
Vec4	getLocationCenter() Get the crosshair location inside the viewport.
String	getResizeBehavior() Returns the crosshair icon's resize behavior.
double	getToViewportScale() Returns the layer's compass-to-viewport scale factor.
void	setIconFilePath(String iconFilePath) Sets the crosshair icon's image location.
void	setIconScale(double iconScale) Sets the scale factor defining the displayed size of the crosshair icon relative to the icon's width and height in its image file.
void	setLocationCenter(Vec4 locationCenter) Set the crosshair location inside the viewport.
void	setResizeBehavior(String resizeBehavior) Sets the behavior the layer uses to size the crosshair icon when the viewport size changes, typically when the World Wind window is resized.
void	setToViewportScale(double toViewportScale) Sets the scale factor applied to the viewport size to determine the displayed size of the crosshair icon.
String	toString()

Methods inherited from class gov.nasa.worldwind.layers.AbstractLayer

createLayerConfigElements, dispose, doPick, doPreRender, getDataFileStore, getExpiryTime, getLayerConfigParams, getMaxActiveAltitude, getMaxEffectiveAltitude, getMinActiveAltitude, getMinEffectiveAltitude, getName, getOpacity, getRestorableState, getScale, getScreenCredit, isAtMaxResolution, isEnabled, isLayerActive, isLayerConfigDocument, isLayerInView, isMultiResolution, isNetworkRetrievalEnabled, isPickEnabled, pick, preRender, render, restoreState, setDataFileStore, setEnabled, setExpiryTime, setMaxActiveAltitude, setMinActiveAltitude, setName, setNetworkRetrievalEnabled, setOpacity, setPickEnabled, setScreenCredit

Methods inherited from class gov.nasa.worldwind.WWObjectImpl

onMessage, propertyChange

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, wait, wait, wait

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

Methods inherited from interface java.beans.PropertyChangeListener

propertyChange

Methods inherited from interface gov.nasa.worldwind.event.MessageListener

onMessage

Constructor Detail

CrosshairLayer

public CrosshairLayer()

CrosshairLayer

public CrosshairLayer(String iconFilePath)

Method Detail

doRender

protected void doRender(DrawContext dc)

Specified by:

doRender in class AbstractLayer

getIconFilePath

public String getIconFilePath()

Returns the layer's current icon file path.

Returns:

the icon file path

getIconScale

public double getIconScale()

Returns the icon scale factor. See setIconScale(double) for a description of the scale factor.

Returns:

the current icon scale

getLocationCenter

public Vec4 getLocationCenter()

Get the crosshair location inside the viewport. If this location is null, the crosshair is drawn in the viewport center.

Returns:

the crosshair location inside the viewport.

getResizeBehavior

public String getResizeBehavior()

Returns the crosshair icon's resize behavior.

Returns:

the icon's resize behavior

getToViewportScale

public double getToViewportScale()

Returns the layer's compass-to-viewport scale factor.

Returns:

the crosshair-to-viewport scale factor

setIconFilePath

public void setIconFilePath(String iconFilePath)

Sets the crosshair icon's image location. The layer first searches for this location in the current Java classpath. If not found then the specified path is assumed to refer to the local file system. found there then the

Parameters:

iconFilePath - the path to the icon's image file

setIconScale

public void setIconScale(double iconScale)

Sets the scale factor defining the displayed size of the crosshair icon relative to the icon's width and height in its image file. Values greater than 1 magify the image, values less than one minify it. If the layer's resize behavior is other than AVKey.RESIZE_KEEP_FIXED_SIZE, the icon's displayed sized is further affected by the value specified by setToViewportScale(double) and the current viewport size.

Parameters:

iconScale - the icon scale factor

setLocationCenter

public void setLocationCenter(Vec4 locationCenter)

Set the crosshair location inside the viewport. If this location is null, the crosshair will be drawn in the viewport center.

Parameters:

locationCenter - the crosshair location inside the viewport.

setResizeBehavior

public void setResizeBehavior(String resizeBehavior)

Sets the behavior the layer uses to size the crosshair icon when the viewport size changes, typically when the World Wind window is resized. If the value is AVKey.RESIZE_KEEP_FIXED_SIZE, the icon size is kept to the size specified in its image file scaled by the layer's current icon scale. If the value is AVKey.RESIZE_STRETCH, the icon is resized to have a constant size relative to the current viewport size. If the viewport shrinks the icon size decreases; if it expands then the icon file enlarges. The relative size is determined by the current crosshair-to-viewport scale and by the icon's image file size scaled by the current icon scale. If the value is AVKey.RESIZE_SHRINK_ONLY (the default), icon sizing behaves as for AVKey.RESIZE_STRETCH but the icon will not grow larger than the size specified in its image file scaled by the current icon scale.

Parameters:

resizeBehavior - the desired resize behavior

setToViewportScale

public void setToViewportScale(double toViewportScale)

Sets the scale factor applied to the viewport size to determine the displayed size of the crosshair icon. This scale factor is used only when the layer's resize behavior is AVKey.RESIZE_STRETCH or AVKey.RESIZE_SHRINK_ONLY. The icon's width is adjusted to occupy the proportion of the viewport's width indicated by this factor. The icon's height is adjusted to maintain the crosshair image's native aspect ratio.

Parameters:

toViewportScale - the compass to viewport scale factor

toString

public String toString()

Overrides:

toString in class AbstractLayer