JDK8/Java8源码在线阅读
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* accompanied this code).
*
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package java.awt;
import sun.awt.AWTAccessor;
import java.io.ObjectStreamException;
import java.lang.annotation.Native;
/**
* A class to encapsulate symbolic colors representing the color of
* native GUI objects on a system. For systems which support the dynamic
* update of the system colors (when the user changes the colors)
* the actual RGB values of these symbolic colors will also change
* dynamically. In order to compare the "current" RGB value of a
* <code>SystemColor</code> object with a non-symbolic Color object,
* <code>getRGB</code> should be used rather than <code>equals</code>.
* <p>
* Note that the way in which these system colors are applied to GUI objects
* may vary slightly from platform to platform since GUI objects may be
* rendered differently on each platform.
* <p>
* System color values may also be available through the <code>getDesktopProperty</code>
* method on <code>java.awt.Toolkit</code>.
*
* @see Toolkit#getDesktopProperty
*
* @author Carl Quinn
* @author Amy Fowler
*/
public final class SystemColor extends Color implements java.io.Serializable {
/**
* The array index for the
* {@link #desktop} system color.
* @see SystemColor#desktop
*/
@Native public final static int DESKTOP = 0;
/**
* The array index for the
* {@link #activeCaption} system color.
* @see SystemColor#activeCaption
*/
@Native public final static int ACTIVE_CAPTION = 1;
/**
* The array index for the
* {@link #activeCaptionText} system color.
* @see SystemColor#activeCaptionText
*/
@Native public final static int ACTIVE_CAPTION_TEXT = 2;
/**
* The array index for the
* {@link #activeCaptionBorder} system color.
* @see SystemColor#activeCaptionBorder
*/
@Native public final static int ACTIVE_CAPTION_BORDER = 3;
/**
* The array index for the
* {@link #inactiveCaption} system color.
* @see SystemColor#inactiveCaption
*/
@Native public final static int INACTIVE_CAPTION = 4;
/**
* The array index for the
* {@link #inactiveCaptionText} system color.
* @see SystemColor#inactiveCaptionText
*/
@Native public final static int INACTIVE_CAPTION_TEXT = 5;
/**
* The array index for the
* {@link #inactiveCaptionBorder} system color.
* @see SystemColor#inactiveCaptionBorder
*/
@Native public final static int INACTIVE_CAPTION_BORDER = 6;
/**
* The array index for the
* {@link #window} system color.
* @see SystemColor#window
*/
@Native public final static int WINDOW = 7;
/**
* The array index for the
* {@link #windowBorder} system color.
* @see SystemColor#windowBorder
*/
@Native public final static int WINDOW_BORDER = 8;
/**
* The array index for the
* {@link #windowText} system color.
* @see SystemColor#windowText
*/
@Native public final static int WINDOW_TEXT = 9;
/**
* The array index for the
* {@link #menu} system color.
* @see SystemColor#menu
*/
@Native public final static int MENU = 10;
/**
* The array index for the
* {@link #menuText} system color.
* @see SystemColor#menuText
*/
@Native public final static int MENU_TEXT = 11;
/**
* The array index for the
* {@link #text} system color.
* @see SystemColor#text
*/
@Native public final static int TEXT = 12;
/**
* The array index for the
* {@link #textText} system color.
* @see SystemColor#textText
*/
@Native public final static int TEXT_TEXT = 13;
/**
* The array index for the
* {@link #textHighlight} system color.
* @see SystemColor#textHighlight
*/
@Native public final static int TEXT_HIGHLIGHT = 14;
/**
* The array index for the
* {@link #textHighlightText} system color.
* @see SystemColor#textHighlightText
*/
@Native public final static int TEXT_HIGHLIGHT_TEXT = 15;
/**
* The array index for the
* {@link #textInactiveText} system color.
* @see SystemColor#textInactiveText
*/
@Native public final static int TEXT_INACTIVE_TEXT = 16;
/**
* The array index for the
* {@link #control} system color.
* @see SystemColor#control
*/
@Native public final static int CONTROL = 17;
/**
* The array index for the
* {@link #controlText} system color.
* @see SystemColor#controlText
*/
@Native public final static int CONTROL_TEXT = 18;
/**
* The array index for the
* {@link #controlHighlight} system color.
* @see SystemColor#controlHighlight
*/
@Native public final static int CONTROL_HIGHLIGHT = 19;
/**
* The array index for the
* {@link #controlLtHighlight} system color.
* @see SystemColor#controlLtHighlight
*/
@Native public final static int CONTROL_LT_HIGHLIGHT = 20;
/**
* The array index for the
* {@link #controlShadow} system color.
* @see SystemColor#controlShadow
*/
@Native public final static int CONTROL_SHADOW = 21;
/**
* The array index for the
* {@link #controlDkShadow} system color.
* @see SystemColor#controlDkShadow
*/
@Native public final static int CONTROL_DK_SHADOW = 22;
/**
* The array index for the
* {@link #scrollbar} system color.
* @see SystemColor#scrollbar
*/
@Native public final static int SCROLLBAR = 23;
/**
* The array index for the
* {@link #info} system color.
* @see SystemColor#info
*/
@Native public final static int INFO = 24;
/**
* The array index for the
* {@link #infoText} system color.
* @see SystemColor#infoText
*/
@Native public final static int INFO_TEXT = 25;
/**
* The number of system colors in the array.
*/
@Native public final static int NUM_COLORS = 26;
/******************************************************************************************/
/*
* System colors with default initial values, overwritten by toolkit if
* system values differ and are available.
* Should put array initialization above first field that is using
* SystemColor constructor to initialize.
*/
private static int[] systemColors = {
0xFF005C5C, // desktop = new Color(0,92,92);
0xFF000080, // activeCaption = new Color(0,0,128);
0xFFFFFFFF, // activeCaptionText = Color.white;
0xFFC0C0C0, // activeCaptionBorder = Color.lightGray;
0xFF808080, // inactiveCaption = Color.gray;
0xFFC0C0C0, // inactiveCaptionText = Color.lightGray;
0xFFC0C0C0, // inactiveCaptionBorder = Color.lightGray;
0xFFFFFFFF, // window = Color.white;
0xFF000000, // windowBorder = Color.black;
0xFF000000, // windowText = Color.black;
0xFFC0C0C0, // menu = Color.lightGray;
0xFF000000, // menuText = Color.black;
0xFFC0C0C0, // text = Color.lightGray;
0xFF000000, // textText = Color.black;
0xFF000080, // textHighlight = new Color(0,0,128);
0xFFFFFFFF, // textHighlightText = Color.white;
0xFF808080, // textInactiveText = Color.gray;
0xFFC0C0C0, // control = Color.lightGray;
0xFF000000, // controlText = Color.black;
0xFFFFFFFF, // controlHighlight = Color.white;
0xFFE0E0E0, // controlLtHighlight = new Color(224,224,224);
0xFF808080, // controlShadow = Color.gray;
0xFF000000, // controlDkShadow = Color.black;
0xFFE0E0E0, // scrollbar = new Color(224,224,224);
0xFFE0E000, // info = new Color(224,224,0);
0xFF000000, // infoText = Color.black;
};
/**
* The color rendered for the background of the desktop.
*/
public final static SystemColor desktop = new SystemColor((byte)DESKTOP);
/**
* The color rendered for the window-title background of the currently active window.
*/
public final static SystemColor activeCaption = new SystemColor((byte)ACTIVE_CAPTION);
/**
* The color rendered for the window-title text of the currently active window.
*/
public final static SystemColor activeCaptionText = new SystemColor((byte)ACTIVE_CAPTION_TEXT);
/**
* The color rendered for the border around the currently active window.
*/
public final static SystemColor activeCaptionBorder = new SystemColor((byte)ACTIVE_CAPTION_BORDER);
/**
* The color rendered for the window-title background of inactive windows.
*/
public final static SystemColor inactiveCaption = new SystemColor((byte)INACTIVE_CAPTION);
/**
* The color rendered for the window-title text of inactive windows.
*/
public final static SystemColor inactiveCaptionText = new SystemColor((byte)INACTIVE_CAPTION_TEXT);
/**
* The color rendered for the border around inactive windows.
*/
public final static SystemColor inactiveCaptionBorder = new SystemColor((byte)INACTIVE_CAPTION_BORDER);
/**
* The color rendered for the background of interior regions inside windows.
*/
public final static SystemColor window = new SystemColor((byte)WINDOW);
/**
* The color rendered for the border around interior regions inside windows.
*/
public final static SystemColor windowBorder = new SystemColor((byte)WINDOW_BORDER);
/**
* The color rendered for text of interior regions inside windows.
*/
public final static SystemColor windowText = new SystemColor((byte)WINDOW_TEXT);
/**
* The color rendered for the background of menus.
*/
public final static SystemColor menu = new SystemColor((byte)MENU);
/**
* The color rendered for the text of menus.
*/
public final static SystemColor menuText = new SystemColor((byte)MENU_TEXT);
/**
* The color rendered for the background of text control objects, such as
* textfields and comboboxes.
*/
public final static SystemColor text = new SystemColor((byte)TEXT);
/**
* The color rendered for the text of text control objects, such as textfields
* and comboboxes.
*/
public final static SystemColor textText = new SystemColor((byte)TEXT_TEXT);
/**
* The color rendered for the background of selected items, such as in menus,
* comboboxes, and text.
*/
public final static SystemColor textHighlight = new SystemColor((byte)TEXT_HIGHLIGHT);
/**
* The color rendered for the text of selected items, such as in menus, comboboxes,
* and text.
*/
public final static SystemColor textHighlightText = new SystemColor((byte)TEXT_HIGHLIGHT_TEXT);
/**
* The color rendered for the text of inactive items, such as in menus.
*/
public final static SystemColor textInactiveText = new SystemColor((byte)TEXT_INACTIVE_TEXT);
/**
* The color rendered for the background of control panels and control objects,
* such as pushbuttons.
*/
public final static SystemColor control = new SystemColor((byte)CONTROL);
/**
* The color rendered for the text of control panels and control objects,
* such as pushbuttons.
*/
public final static SystemColor controlText = new SystemColor((byte)CONTROL_TEXT);
/**
* The color rendered for light areas of 3D control objects, such as pushbuttons.
* This color is typically derived from the <code>control</code> background color
* to provide a 3D effect.
*/
public final static SystemColor controlHighlight = new SystemColor((byte)CONTROL_HIGHLIGHT);
/**
* The color rendered for highlight areas of 3D control objects, such as pushbuttons.
* This color is typically derived from the <code>control</code> background color
* to provide a 3D effect.
*/
public final static SystemColor controlLtHighlight = new SystemColor((byte)CONTROL_LT_HIGHLIGHT);
/**
* The color rendered for shadow areas of 3D control objects, such as pushbuttons.
* This color is typically derived from the <code>control</code> background color
* to provide a 3D effect.
*/
public final static SystemColor controlShadow = new SystemColor((byte)CONTROL_SHADOW);
/**
* The color rendered for dark shadow areas on 3D control objects, such as pushbuttons.
* This color is typically derived from the <code>control</code> background color
* to provide a 3D effect.
*/
public final static SystemColor controlDkShadow = new SystemColor((byte)CONTROL_DK_SHADOW);
/**
* The color rendered for the background of scrollbars.
*/
public final static SystemColor scrollbar = new SystemColor((byte)SCROLLBAR);
/**
* The color rendered for the background of tooltips or spot help.
*/
public final static SystemColor info = new SystemColor((byte)INFO);
/**
* The color rendered for the text of tooltips or spot help.
*/
public final static SystemColor infoText = new SystemColor((byte)INFO_TEXT);
/*
* JDK 1.1 serialVersionUID.
*/
private static final long serialVersionUID = 4503142729533789064L;
/*
* An index into either array of SystemColor objects or values.
*/
private transient int index;
private static SystemColor systemColorObjects [] = {
SystemColor.desktop,
SystemColor.activeCaption,
SystemColor.activeCaptionText,
SystemColor.activeCaptionBorder,
SystemColor.inactiveCaption,
SystemColor.inactiveCaptionText,
SystemColor.inactiveCaptionBorder,
SystemColor.window,
SystemColor.windowBorder,
SystemColor.windowText,
SystemColor.menu,
SystemColor.menuText,
SystemColor.text,
SystemColor.textText,
SystemColor.textHighlight,
SystemColor.textHighlightText,
SystemColor.textInactiveText,
SystemColor.control,
SystemColor.controlText,
SystemColor.controlHighlight,
SystemColor.controlLtHighlight,
SystemColor.controlShadow,
SystemColor.controlDkShadow,
SystemColor.scrollbar,
SystemColor.info,
SystemColor.infoText
};
static {
AWTAccessor.setSystemColorAccessor(SystemColor::updateSystemColors);
updateSystemColors();
}
/**
* Called from {@code <init>} and toolkit to update the above systemColors cache.
*/
private static void updateSystemColors() {
if (!GraphicsEnvironment.isHeadless()) {
Toolkit.getDefaultToolkit().loadSystemColors(systemColors);
}
for (int i = 0; i < systemColors.length; i++) {
systemColorObjects[i].value = systemColors[i];
}
}
/**
* Creates a symbolic color that represents an indexed entry into system
* color cache. Used by above static system colors.
*/
private SystemColor(byte index) {
super(systemColors[index]);
this.index = index;
}
/**
* Returns a string representation of this <code>Color</code>'s values.
* This method is intended to be used only for debugging purposes,
* and the content and format of the returned string may vary between
* implementations.
* The returned string may be empty but may not be <code>null</code>.
*
* @return a string representation of this <code>Color</code>
*/
public String toString() {
return getClass().getName() + "[i=" + (index) + "]";
}
/**
* The design of the {@code SystemColor} class assumes that
* the {@code SystemColor} object instances stored in the
* static final fields above are the only instances that can
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