at.mug.iqm.api.gui.util

Class ZoomHelper

java.lang.Object

at.mug.iqm.api.gui.util.ZoomHelper

public class ZoomHelper
extends Object

Since:

27.07.2012

Author:

Philipp Kainz

Field Summary

Fields

Modifier and Type	Field and Description
private double[]	fixedLevels A predefined list of fixed zoom levels.
private static org.apache.log4j.Logger	logger Custom class logger
private LinkedList<Double>	zoomLevels The list of supported zoom levels in this class.

Constructor Summary

Constructors

Constructor and Description
ZoomHelper() Default constructor.

Method Summary

Modifier and Type	Method and Description
void	calculateZoomLevels(double minDimension) Calculates the zoom level according to a given minimum dimension.
double	getHigherZoomLevel(double currentLevel) Get the next higher zoom level according to a given level.
double	getLowerZoomLevel(double currentLevel) Get the next lower zoom level according to a given level.
double	getMaximalZoom() Gets the maximal zoom of the calculated zoom list.
double	getMinimalZoom() Gets the minimal zoom of the calculated zoom list.
LinkedList<Double>	getZoomLevels()
protected void	setZoomLevels(LinkedList<Double> zoomLevels)

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.apache.log4j.Logger logger

Custom class logger

fixedLevels

private final double[] fixedLevels

A predefined list of fixed zoom levels.

zoomLevels

private LinkedList<Double> zoomLevels

The list of supported zoom levels in this class.

Constructor Detail

ZoomHelper

public ZoomHelper()

Default constructor.

Method Detail

getLowerZoomLevel

public double getLowerZoomLevel(double currentLevel)

Get the next lower zoom level according to a given level.

Parameters:

currentLevel - the given zoom level

Returns:

the next lower zoom level

getHigherZoomLevel

public double getHigherZoomLevel(double currentLevel)

Get the next higher zoom level according to a given level.

Parameters:

currentLevel - the given zoom level

Returns:

the next higher zoom level

calculateZoomLevels

public void calculateZoomLevels(double minDimension)

Calculates the zoom level according to a given minimum dimension.

Parameters:

minDimension - the minimum dimension

getMinimalZoom

public double getMinimalZoom()

Gets the minimal zoom of the calculated zoom list.

getMaximalZoom

public double getMaximalZoom()

Gets the maximal zoom of the calculated zoom list.

getZoomLevels

public LinkedList<Double> getZoomLevels()

Returns:

the zoomLevels

setZoomLevels

protected void setZoomLevels(LinkedList<Double> zoomLevels)

Parameters:

zoomLevels - the zoomLevels to set