com.jgoodies.looks
Class LookUtils

java.lang.Object
  extended by com.jgoodies.looks.LookUtils

public final class LookUtils
extends Object

Provides convenience behavior used by the JGoodies Looks.

Version:
$Revision: 1.6 $
Author:
Karsten Lentzsch

Field Summary
static boolean IS_JAVA_1_4
          True if this is Java 1.4.
static boolean IS_JAVA_1_4_0
          True if this is Java 1.4.0_*.
static boolean IS_JAVA_1_4_2_OR_LATER
          True if this is Java 1.4.2 or later.
static boolean IS_JAVA_1_4_OR_5
          True if this is Java 1.4 or Java 5.
static boolean IS_JAVA_5
          True if this is Java 5.x.
static boolean IS_JAVA_5_OR_LATER
          True if this is Java 5.x or later.
static boolean IS_JAVA_6
          True if this is Java 6.
static boolean IS_JAVA_6_OR_LATER
          True if this is Java 6.x or later.
static boolean IS_LAF_WINDOWS_XP_ENABLED
          True if the Windows XP Look&Feel is enabled.
static boolean IS_LOW_RESOLUTION
          True if if the screen resolution is smaller than 120 dpi.
static boolean IS_OS_FREEBSD
          True if this is FreeBSD.
static boolean IS_OS_LINUX
          True if this is Linux.
static boolean IS_OS_MAC
          True if this is the Mac OS X.
static boolean IS_OS_OS2
          True if this is OS/2.
static boolean IS_OS_SOLARIS
          True if this is Solaris.
static boolean IS_OS_WINDOWS
          True if this is Windows.
static boolean IS_OS_WINDOWS_2000
          True if this is Windows 2000.
static boolean IS_OS_WINDOWS_95
          True if this is Windows 95.
static boolean IS_OS_WINDOWS_98
          True if this is Windows 98.
static boolean IS_OS_WINDOWS_ME
          True if this is Windows ME.
static boolean IS_OS_WINDOWS_MODERN
          True if this is Windows 98/ME/2000/XP/VISTA.
static boolean IS_OS_WINDOWS_NT
          True if this is Windows NT.
static boolean IS_OS_WINDOWS_VISTA
          True if this is Windows Vista.
static boolean IS_OS_WINDOWS_XP
          True if this is Windows XP.
 
Method Summary
static Boolean getBooleanSystemProperty(String key, String logMessage)
          Checks if a boolean system property has been set for the given key, and returns the associated Boolean, or null if no value has been set.
static Object getDefaultTheme(LookAndFeel laf)
           
static List getInstalledThemes(LookAndFeel laf)
           
static Color getSlightlyBrighter(Color color)
          Computes and returns a Color that is slightly brighter than the specified Color.
static Color getSlightlyBrighter(Color color, float factor)
          Computes and returns a Color that is slightly brighter than the specified Color.
static String getSystemProperty(String key)
          Tries to look up the System property for the given key.
static String getSystemProperty(String key, String defaultValue)
          Tries to look up the System property for the given key.
static boolean getToolkitUsesNativeDropShadows()
          Checks and answers whether this toolkit provides native drop shadows for popups such as the Mac OS X.
static boolean isTrueColor(Component c)
          Checks and answers whether we have a true color system.
static void log()
          Prints a new line to the console if logging is enabled.
static void log(String message)
          Prints the given message to the console if logging is enabled.
static void setLoggingEnabled(boolean enabled)
          Enables or disables the Looks logging.
static void setLookAndTheme(LookAndFeel laf, Object theme)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

IS_JAVA_1_4

public static final boolean IS_JAVA_1_4
True if this is Java 1.4.


IS_JAVA_1_4_0

public static final boolean IS_JAVA_1_4_0
True if this is Java 1.4.0_*.


IS_JAVA_1_4_2_OR_LATER

public static final boolean IS_JAVA_1_4_2_OR_LATER
True if this is Java 1.4.2 or later. Since we assume Java 1.4 we just check for 1.4.0 and 1.4.1.


IS_JAVA_5

public static final boolean IS_JAVA_5
True if this is Java 5.x. We check for a prefix of 1.5.


IS_JAVA_5_OR_LATER

public static final boolean IS_JAVA_5_OR_LATER
True if this is Java 5.x or later. Since we don't support Java 1.3, we can check that it's not 1.4.


IS_JAVA_6

public static final boolean IS_JAVA_6
True if this is Java 6. We check for a prefix of 1.6.


IS_JAVA_6_OR_LATER

public static final boolean IS_JAVA_6_OR_LATER
True if this is Java 6.x or later. Since we don't support Java 1.3, we can check that it's neither 1.4 nor 1.5.


IS_JAVA_1_4_OR_5

public static final boolean IS_JAVA_1_4_OR_5
True if this is Java 1.4 or Java 5.


IS_OS_FREEBSD

public static final boolean IS_OS_FREEBSD
True if this is FreeBSD.


IS_OS_LINUX

public static final boolean IS_OS_LINUX
True if this is Linux.


IS_OS_OS2

public static final boolean IS_OS_OS2
True if this is OS/2.


IS_OS_MAC

public static final boolean IS_OS_MAC
True if this is the Mac OS X.


IS_OS_WINDOWS

public static final boolean IS_OS_WINDOWS
True if this is Windows.


IS_OS_WINDOWS_MODERN

public static final boolean IS_OS_WINDOWS_MODERN
True if this is Windows 98/ME/2000/XP/VISTA.


IS_OS_WINDOWS_95

public static final boolean IS_OS_WINDOWS_95
True if this is Windows 95.

Since:
2.0

IS_OS_WINDOWS_98

public static final boolean IS_OS_WINDOWS_98
True if this is Windows 98.

Since:
2.0

IS_OS_WINDOWS_NT

public static final boolean IS_OS_WINDOWS_NT
True if this is Windows NT.

Since:
2.0

IS_OS_WINDOWS_ME

public static final boolean IS_OS_WINDOWS_ME
True if this is Windows ME.

Since:
2.0

IS_OS_WINDOWS_2000

public static final boolean IS_OS_WINDOWS_2000
True if this is Windows 2000.

Since:
2.0

IS_OS_WINDOWS_XP

public static final boolean IS_OS_WINDOWS_XP
True if this is Windows XP.


IS_OS_WINDOWS_VISTA

public static final boolean IS_OS_WINDOWS_VISTA
True if this is Windows Vista.

Since:
2.0

IS_OS_SOLARIS

public static final boolean IS_OS_SOLARIS
True if this is Solaris.


IS_LAF_WINDOWS_XP_ENABLED

public static final boolean IS_LAF_WINDOWS_XP_ENABLED
True if the Windows XP Look&Feel is enabled.


IS_LOW_RESOLUTION

public static final boolean IS_LOW_RESOLUTION
True if if the screen resolution is smaller than 120 dpi.

See Also:
Toolkit.getScreenResolution()
Method Detail

getSystemProperty

public static String getSystemProperty(String key)
Tries to look up the System property for the given key. In untrusted environments this may throw a SecurityException. In this case we catch the exception and answer null.

Parameters:
key - the name of the system property
Returns:
the system property's String value, or null if there's no such value, or a SecurityException has been catched

getSystemProperty

public static String getSystemProperty(String key,
                                       String defaultValue)
Tries to look up the System property for the given key. In untrusted environments this may throw a SecurityException. In this case, we catch the exception and answer the default value.

Parameters:
key - the name of the system property
defaultValue - the default value if no property exists.
Returns:
the system property's String value, or the defaultValue if there's no such value, or a SecurityException has been catched

getBooleanSystemProperty

public static Boolean getBooleanSystemProperty(String key,
                                               String logMessage)
Checks if a boolean system property has been set for the given key, and returns the associated Boolean, or null if no value has been set. The test for the property ignores case. If a Boolean value has been set, a message is logged with the given prefix.

Parameters:
key - the key used to lookup the system property value
logMessage - a prefix used when a message is logged
Returns:
Boolean.TRUE if the system property has been set to "true" (case ignored), Boolean.FALSE if it has been set to "false", null otherwise

isTrueColor

public static boolean isTrueColor(Component c)
Checks and answers whether we have a true color system.

Parameters:
c - the component used to determine the toolkit
Returns:
true if the component's toolkit has a pixel size >= 24

getToolkitUsesNativeDropShadows

public static boolean getToolkitUsesNativeDropShadows()
Checks and answers whether this toolkit provides native drop shadows for popups such as the Mac OS X. Currently this is used to determine if the Looks' popup drop shadow feature is active or not - even if it's enabled.

Returns:
true if the toolkit provides native drop shadows
See Also:
Options.isPopupDropShadowActive()

getSlightlyBrighter

public static Color getSlightlyBrighter(Color color)
Computes and returns a Color that is slightly brighter than the specified Color.

Parameters:
color - the color used as basis for the brightened color
Returns:
a slightly brighter color

getSlightlyBrighter

public static Color getSlightlyBrighter(Color color,
                                        float factor)
Computes and returns a Color that is slightly brighter than the specified Color.

Parameters:
color - the color used as basis for the brightened color
factor - the factor used to compute the brightness
Returns:
a slightly brighter color

setLookAndTheme

public static void setLookAndTheme(LookAndFeel laf,
                                   Object theme)
                            throws UnsupportedLookAndFeelException
Throws:
UnsupportedLookAndFeelException

getDefaultTheme

public static Object getDefaultTheme(LookAndFeel laf)

getInstalledThemes

public static List getInstalledThemes(LookAndFeel laf)

setLoggingEnabled

public static void setLoggingEnabled(boolean enabled)
Enables or disables the Looks logging.

Parameters:
enabled - true to enable logging, false to disable it

log

public static void log()
Prints a new line to the console if logging is enabled.


log

public static void log(String message)
Prints the given message to the console if logging is enabled.

Parameters:
message - the message to print


Copyright © 2001-2006 JGoodies Karsten Lentzsch. All Rights Reserved.