oracle.spatial.network.nfe.vis.maps.layer.ui

Class ScaleBarLayer

java.lang.Object

oracle.spatial.network.nfe.vis.maps.layer.BasicLayer

oracle.spatial.network.nfe.vis.maps.layer.ui.ScaleBarLayer

All Implemented Interfaces:

Layer

public class ScaleBarLayer
extends BasicLayer

A background layer that sits at the bottom of layer stack, and intercepts primarily mouse wheel zooming and mouse panning events.

Field Summary

Fields inherited from interface oracle.spatial.network.nfe.vis.maps.core.Layer

PROPERTY_NAME, PROPERTY_PROVIDERID, PROPERTY_SRID, PROPERTY_VISIBLE

Constructor Summary

Constructors

Constructor and Description
ScaleBarLayer(MapCanvas parent)

Method Summary

Modifier and Type	Method and Description
boolean	handleEvent(java.util.EventObject evt) The main method that performs event handling for this tool.
void	mapRegionChanged(MapRegionEvent e) When the associated canvas's map region is changed, this method is called to notify the layer of the change.
long	render(java.awt.Graphics2D g) Renders the layer contents to the given Graphics.
void	setVisible(boolean v) Sets the visibility of this layer.

Methods inherited from class oracle.spatial.network.nfe.vis.maps.layer.BasicLayer

added, addPropertyChangeListener, addPropertyChangeListener, clear, fromXMLElement, getCanvas, getDataMBR, getFullExtent, getIcon, getName, getProperties, getProperty, getProperty, getPropertyChangeListeners, getPropertyChangeListeners, getProviderID, getSRID, hitTest, hitTest, isVisible, removed, removePropertyChangeListener, removePropertyChangeListener, repaint, setCanvas, setName, setProperty, setProviderID, setSRID, toXMLElement, update

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ScaleBarLayer

public ScaleBarLayer(MapCanvas parent)

Method Detail

handleEvent

public boolean handleEvent(java.util.EventObject evt)

Description copied from interface: Layer

The main method that performs event handling for this tool. Returns whether the event should be propagated to other layers down stream (further down the layer stack) after the event has been handled.

Specified by:

handleEvent in interface Layer

Overrides:

handleEvent in class BasicLayer

render

public long render(java.awt.Graphics2D g)

Description copied from interface: Layer

Renders the layer contents to the given Graphics.

Specified by:

render in interface Layer

Overrides:

render in class BasicLayer

Parameters:

g - the graphics object

Returns:

the rendering time in milliseconds.

setVisible

public void setVisible(boolean v)

Description copied from interface: Layer

Sets the visibility of this layer.

Specified by:

setVisible in interface Layer

Overrides:

setVisible in class BasicLayer

mapRegionChanged

public void mapRegionChanged(MapRegionEvent e)

Description copied from interface: Layer

When the associated canvas's map region is changed, this method is called to notify the layer of the change. Note that either a device window change (as a result of resizing the application window) or a data window change can cause this method to be invoked. Query the canvas' MapRegion object to get the changed values. Inside a mapRegionChanged() implementation, the layer typically needs to update its data contents accordingly.

Specified by:

mapRegionChanged in interface Layer

Overrides:

mapRegionChanged in class BasicLayer