Package org.eclipse.nebula.widgets.nattable.layer

Class AbstractDpiConverter

java.lang.Object

org.eclipse.nebula.widgets.nattable.layer.AbstractDpiConverter

All Implemented Interfaces:

IDpiConverter

Direct Known Subclasses:

DefaultHorizontalDpiConverter, DefaultVerticalDpiConverter, FixedScalingDpiConverter, NoScalingDpiConverter

public abstract class AbstractDpiConverter
extends Object
implements IDpiConverter

Abstract implementation for IDpiConverter that predefines dpi conversion factors and methods that convert based on these factors.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	dpi
protected float	scaleFactor

Constructor Summary

Constructors

Constructor	Description
AbstractDpiConverter()

Method Summary

Modifier and Type	Method	Description
int	convertDpiToPixel(int dpi)	Converts the given DPI scaled value to a pixel value.
int	convertPixelToDpi(int pixel)	Converts the given amount of pixels to a DPI scaled value.
float	getCurrentDpiFactor()
int	getDpi()	Returns the dots per inch of the display.
protected abstract void	readDpiFromDisplay()	Sets the value for the dpi member variable.

Methods inherited from class java.lang.Object

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

Field Detail

dpi

protected int dpi

scaleFactor

protected float scaleFactor

Since:

2.0

Constructor Detail

AbstractDpiConverter

public AbstractDpiConverter()

Method Detail

readDpiFromDisplay

protected abstract void readDpiFromDisplay()

Sets the value for the dpi member variable.

IMPORTANT:
Ensure the load operation is done in the UI thread!

getDpi

public int getDpi()

Description copied from interface: IDpiConverter

Returns the dots per inch of the display.

Specified by:

getDpi in interface IDpiConverter

Returns:

the horizontal and vertical DPI

getCurrentDpiFactor

public float getCurrentDpiFactor()

Specified by:

getCurrentDpiFactor in interface IDpiConverter

Returns:

The factor that will be used for the current DPI.

convertPixelToDpi

public int convertPixelToDpi(int pixel)

Description copied from interface: IDpiConverter

Converts the given amount of pixels to a DPI scaled value.

Specified by:

convertPixelToDpi in interface IDpiConverter

Parameters:

pixel - the amount of pixels to convert.

Returns:

The converted pixels.

convertDpiToPixel

public int convertDpiToPixel(int dpi)

Description copied from interface: IDpiConverter

Converts the given DPI scaled value to a pixel value.

Specified by:

convertDpiToPixel in interface IDpiConverter

Parameters:

dpi - the DPI value to convert.

Returns:

The pixel value related to the given DPI