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/*
* Copyright (c) 2001-2006 JGoodies Karsten Lentzsch. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* o Neither the name of JGoodies Karsten Lentzsch nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.pushingpixels.lafwidget.utils;
import java.awt.*;
import java.util.Locale;
/**
* Provides convenience behavior used by the JGoodies Looks.
*
* @author Karsten Lentzsch
*/
public final class LookUtils {
// Basics System Properties **********************************************
/**
* The java.version System Property.
*
*
* Defaults to null if the runtime does not have security
* access to read this property or the property does not exist.
*/
private static final String JAVA_VERSION = getSystemProperty("java.version");
/**
* The os.name System Property. Operating system name.
*
*
* Defaults to null if the runtime does not have security
* access to read this property or the property does not exist.
*/
private static final String OS_NAME = getSystemProperty("os.name");
/**
* The os.version System Property. Operating system version.
*
*
* Defaults to null if the runtime does not have security
* access to read this property or the property does not exist.
*/
private static final String OS_VERSION = getSystemProperty("os.version");
// Requesting the Java Version ********************************************
/**
* True if this is Java 1.4.
*/
public static final boolean IS_JAVA_1_4 = startsWith(JAVA_VERSION, "1.4");
/**
* True if this is Java 1.4.0_*.
*/
public static final boolean IS_JAVA_1_4_0 = startsWith(JAVA_VERSION,
"1.4.0");
/**
* 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.
*/
public static final boolean IS_JAVA_1_4_2_OR_LATER = !startsWith(
JAVA_VERSION, "1.4.0")
&& !startsWith(JAVA_VERSION, "1.4.1");
/**
* True if this is Java 5.x. We check for a prefix of 1.5.
*/
public static final boolean IS_JAVA_5 = startsWith(JAVA_VERSION, "1.5");
/**
* 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.
*/
public static final boolean IS_JAVA_5_OR_LATER = !IS_JAVA_1_4;
/**
* True if this is Java 6. We check for a prefix of 1.6.
*/
public static final boolean IS_JAVA_6 = startsWith(JAVA_VERSION, "1.6");
/**
* 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.
*/
public static final boolean IS_JAVA_6_OR_LATER = !IS_JAVA_1_4 && !IS_JAVA_5;
/**
* True if this is Java 1.4 or Java 5.
*/
public static final boolean IS_JAVA_1_4_OR_5 = IS_JAVA_1_4 || IS_JAVA_5;
// Requesting the Operating System Name ***********************************
/**
* True if this is FreeBSD.
*/
public static final boolean IS_OS_FREEBSD = startsWithIgnoreCase(OS_NAME,
"FreeBSD");
/**
* True if this is Linux.
*/
public static final boolean IS_OS_LINUX = startsWithIgnoreCase(OS_NAME,
"Linux");
/**
* True if this is OS/2.
*/
public static final boolean IS_OS_OS2 = startsWith(OS_NAME, "OS/2");
/**
* True if this is the Mac OS X.
*/
public static final boolean IS_OS_MAC = startsWith(OS_NAME, "Mac");
/**
* True if this is Windows.
*/
public static final boolean IS_OS_WINDOWS = startsWith(OS_NAME, "Windows");
/**
* True if this is Windows 98/ME/2000/XP/VISTA.
*/
public static final boolean IS_OS_WINDOWS_MODERN = startsWith(OS_NAME,
"Windows")
&& !startsWith(OS_VERSION, "4.0");
/**
* True if this is Windows 95.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_95 = startsWith(OS_NAME,
"Windows 9")
&& startsWith(OS_VERSION, "4.0");
/**
* True if this is Windows 98.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_98 = startsWith(OS_NAME,
"Windows 9")
&& startsWith(OS_VERSION, "4.1");
/**
* True if this is Windows NT.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_NT = startsWith(OS_NAME,
"Windows NT");
/**
* True if this is Windows ME.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_ME = startsWith(OS_NAME,
"Windows")
&& startsWith(OS_VERSION, "4.9");
/**
* True if this is Windows 2000.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_2000 = startsWith(OS_NAME,
"Windows")
&& startsWith(OS_VERSION, "5.0");
/**
* True if this is Windows XP.
*/
public static final boolean IS_OS_WINDOWS_XP = startsWith(OS_NAME,
"Windows")
&& startsWith(OS_VERSION, "5.1");
/**
* True if this is Windows Vista.
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_VISTA = startsWith(OS_NAME,
"Windows")
&& startsWith(OS_VERSION, "6.0");
/**
* True if this is Solaris.
*/
public static final boolean IS_OS_SOLARIS = startsWith(OS_NAME, "Solaris");
// Other Properties *******************************************************
/**
* True if the Windows XP Look&Feel is enabled.
*/
public static final boolean IS_LAF_WINDOWS_XP_ENABLED = isWindowsXPLafEnabled();
/**
* True if if the screen resolution is smaller than 120 dpi.
*
* @see Toolkit#getScreenResolution()
*/
public static final boolean IS_LOW_RESOLUTION = isLowResolution();
private static boolean loggingEnabled = true;
private LookUtils() {
// Override default constructor; prevents instantiation.
}
// Accessing System Configuration *****************************************
/**
* 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.
*
* @param key
* the name of the system property
* @return the system property's String value, or null if
* there's no such value, or a SecurityException has been caught
*/
public static String getSystemProperty(String key) {
try {
return System.getProperty(key);
} catch (SecurityException e) {
// log("Can't read the System property " + key + ".");
return null;
}
}
/**
* 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.
*
* @param key
* the name of the system property
* @param defaultValue
* the default value if no property exists.
* @return the system property's String value, or the defaultValue if
* there's no such value, or a SecurityException has been caught
*/
public static String getSystemProperty(String key, String defaultValue) {
try {
return System.getProperty(key, defaultValue);
} catch (SecurityException e) {
// log("Can't read the System property " + key + ".");
return defaultValue;
}
}
/**
* 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.
*
* @param key
* the key used to lookup the system property value
* @param logMessage
* a prefix used when a message is logged
* @return Boolean.TRUE if the system property has been set to
* "true" (case ignored), Boolean.FALSE if it has been
* set to "false", null otherwise
*/
public static Boolean getBooleanSystemProperty(String key, String logMessage) {
String value = getSystemProperty(key, "");
Boolean result;
if (value.equalsIgnoreCase("false"))
result = Boolean.FALSE;
else if (value.equalsIgnoreCase("true"))
result = Boolean.TRUE;
else
result = null;
if (result != null) {
LookUtils.log(logMessage + " have been "
+ (result.booleanValue() ? "en" : "dis")
+ "abled in the system properties.");
}
return result;
}
/**
* Checks and answers whether the Windows XP style is enabled. This method
* is intended to be called only if a Windows look&feel is about to be
* installed or already active in the UIManager. The XP style of the Windows
* look&feel is enabled by default on Windows XP platforms since the
* J2SE 1.4.2; it can be disabled either in the Windows desktop as well as
* in the Java runtime by setting a System property.
*
*
* First checks the platform, platform version and Java version. Then checks
* whether the desktop property win.xpstyle.themeActive is set or
* not.
*
* @return true if the Windows XP style is enabled
*/
private static boolean isWindowsXPLafEnabled() {
return (IS_OS_WINDOWS_XP || IS_OS_WINDOWS_VISTA)
&& IS_JAVA_1_4_2_OR_LATER
&& Boolean.TRUE.equals(Toolkit.getDefaultToolkit()
.getDesktopProperty("win.xpstyle.themeActive"))
&& getSystemProperty("swing.noxp") == null;
}
/**
* Checks and answers whether we have a true color system.
*
* @param c
* the component used to determine the toolkit
* @return true if the component's toolkit has a pixel size >= 24
*/
public static boolean isTrueColor(Component c) {
return c.getToolkit().getColorModel().getPixelSize() >= 24;
}
/**
* 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.
*
* @return true if the toolkit provides native drop shadows
*
* @see Options#isPopupDropShadowActive()
*/
public static boolean getToolkitUsesNativeDropShadows() {
return IS_OS_MAC;
}
/**
* Computes and returns a Color that is slightly brighter than the specified
* Color.
*
* @param color
* the color used as basis for the brightened color
* @return a slightly brighter color
*/
public static Color getSlightlyBrighter(Color color) {
return getSlightlyBrighter(color, 1.1f);
}
/**
* Computes and returns a Color that is slightly brighter than the specified
* Color.
*
* @param color
* the color used as basis for the brightened color
* @param factor
* the factor used to compute the brightness
* @return a slightly brighter color
*/
public static Color getSlightlyBrighter(Color color, float factor) {
float[] hsbValues = new float[3];
Color.RGBtoHSB(color.getRed(), color.getGreen(), color.getBlue(),
hsbValues);
float hue = hsbValues[0];
float saturation = hsbValues[1];
float brightness = hsbValues[2];
float newBrightness = Math.min(brightness * factor, 1.0f);
return Color.getHSBColor(hue, saturation, newBrightness);
}
// Minimal logging ******************************************************
/**
* Enables or disables the Looks logging.
*
* @param enabled
* true to enable logging, false to disable it
*/
public static void setLoggingEnabled(boolean enabled) {
loggingEnabled = enabled;
}
/**
* Prints a new line to the console if logging is enabled.
*/
public static void log() {
if (loggingEnabled) {
System.out.println();
}
}
/**
* Prints the given message to the console if logging is enabled.
*
* @param message
* the message to print
*/
public static void log(String message) {
if (loggingEnabled) {
System.out.println("JGoodies Looks: " + message);
}
}
// Private Helper Methods ***********************************************
/**
* Checks and answers whether the screen resolution is low or high.
* Resolutions below 120 dpi are considere low, all others are high.
*
* @return true if the screen resolution is smaller than 120 dpi
*/
private static boolean isLowResolution() {
return Toolkit.getDefaultToolkit().getScreenResolution() < 120;
}
private static boolean startsWith(String str, String prefix) {
return str != null && str.startsWith(prefix);
}
private static boolean startsWithIgnoreCase(String str, String prefix) {
return str != null
&& str.toUpperCase(Locale.ENGLISH).startsWith(
prefix.toUpperCase(Locale.ENGLISH));
}
}