Package org.apache.jorphan.gui.ui

Class KerningOptimizer

java.lang.Object

org.apache.jorphan.gui.ui.KerningOptimizer

@API(since="5.5",
     status=INTERNAL)
public class KerningOptimizer
extends Object

Text rendering might be slow for long lines when kerning is enabled, so it is worth disabling kerning for long texts.

Field Summary

Fields

Modifier and Type	Field	Description
static final KerningOptimizer	INSTANCE

Constructor Summary

Constructors

Constructor	Description
KerningOptimizer()

Method Summary

Modifier and Type	Method	Description
void	configureKerning(JComponent component, int documentLength)	Configures text kerning according to the expected document length.
int	getMaxTextLengthWithKerning()
void	installKerningListener(JTextComponent textComponent)	Adds a listener that disables kerning if text length reaches a certain threshold.
void	setMaxTextLengthWithKerning(int length)	Configures the maximum document length for rendering with kerning enabled.
void	uninstallKerningListener(JTextComponent textComponent)	Removes the listener that disables kerning if text length reaches a certain threshold.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final KerningOptimizer INSTANCE

Constructor Details

KerningOptimizer

public KerningOptimizer()

Method Details

setMaxTextLengthWithKerning

public void setMaxTextLengthWithKerning(int length)

Configures the maximum document length for rendering with kerning enabled.

Parameters:

length - maximum document length for rendering with kerning enabled

getMaxTextLengthWithKerning

public int getMaxTextLengthWithKerning()

configureKerning

public void configureKerning(JComponent component,
 int documentLength)

Configures text kerning according to the expected document length. This might be useful before setting the document so the kerning is disabled before updating the document.

Parameters:

component - text component for kerning configuration

documentLength - expected document length

installKerningListener

public void installKerningListener(JTextComponent textComponent)

Adds a listener that disables kerning if text length reaches a certain threshold.

Parameters:

textComponent - text component for kerning configuration

uninstallKerningListener

public void uninstallKerningListener(JTextComponent textComponent)

Removes the listener that disables kerning if text length reaches a certain threshold.

Parameters:

textComponent - text component for kerning configuration