/jgoodies-looks/src/main/java/com/jgoodies/looks/LookUtils.java
Java | 492 lines | 171 code | 73 blank | 248 comment | 31 complexity | f0843aeaf50d0797226dfb1fb317ade6 MD5 | raw file
- /*
- * Copyright (c) 2001-2007 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 com.jgoodies.looks;
- import java.awt.Color;
- import java.awt.Component;
- import java.awt.Toolkit;
- import java.util.Collections;
- import java.util.List;
- import java.util.Locale;
- import javax.swing.LookAndFeel;
- import javax.swing.UIManager;
- import javax.swing.UnsupportedLookAndFeelException;
- import com.jgoodies.looks.plastic.PlasticLookAndFeel;
- import com.jgoodies.looks.plastic.PlasticTheme;
- /**
- * Provides convenience behavior used by the JGoodies Looks.
- *
- * @author Karsten Lentzsch
- * @version $Revision: 1.9 $
- */
- public final class LookUtils {
-
- // Basics System Properties **********************************************
- /**
- * The <code>java.version</code> System Property.<p>
- *
- * Defaults to <code>null</code> 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 <code>os.name</code> System Property. Operating system name.<p>
- *
- * Defaults to <code>null</code> 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 <code>os.version</code> System Property. Operating system version.<p>
- *
- * Defaults to <code>null</code> 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 <code>null</code>.
- *
- * @param key the name of the system property
- * @return the system property's String value, or <code>null</code> 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 <code>null</code> 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 <code>Boolean.TRUE</code> if the system property has been set to
- * "true" (case ignored), <code>Boolean.FALSE</code> if it has been set to
- * "false", <code>null</code> 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.<p>
- *
- * First checks the platform, platform version and Java version. Then
- * checks whether the desktop property <tt>win.xpstyle.themeActive</tt>
- * 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);
- }
-
- // Accessing Look, Theme, and Font Settings *****************************
- public static void setLookAndTheme(LookAndFeel laf, Object theme)
- throws UnsupportedLookAndFeelException {
- if ((laf instanceof PlasticLookAndFeel)
- && (theme != null)
- && (theme instanceof PlasticTheme)) {
- PlasticLookAndFeel.setPlasticTheme((PlasticTheme) theme);
- }
- UIManager.setLookAndFeel(laf);
- }
- public static Object getDefaultTheme(LookAndFeel laf) {
- return laf instanceof PlasticLookAndFeel
- ? PlasticLookAndFeel.createMyDefaultTheme()
- : null;
- }
- public static List getInstalledThemes(LookAndFeel laf) {
- return laf instanceof PlasticLookAndFeel
- ? PlasticLookAndFeel.getInstalledThemes()
- : Collections.EMPTY_LIST;
- }
-
- // 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));
- }
- }