java类java.awt.SystemColor的实例源码

public static void drawText(Graphics g, ChoiceState s) {
    String text = s.getText();
    if (text == null) {
        return;
    }

    Rectangle r = s.getTextBounds();

    Shape oldClip = g.getClip();
    g.clipRect(r.x, r.y, r.width, r.height);

    g.setFont(s.getFont());
    g.setColor(s.isFocused() ? SystemColor.textHighlightText
                             : s.getTextColor());
    int baseX = r.x;
    int baseY = r.y + r.height - s.getFontMetrics().getDescent();
    if (s.isEnabled()) {
        g.drawString(text, baseX, baseY);
    } else {
        drawDisabledString(g, text, baseX, baseY);
    }
    g.setClip(oldClip);
}

public boolean show() {
    if (!shown) {
        fileDialog.setBackground(SystemColor.control);
        // create components & add listeners here
        createComponents();
        addLayoutComponents();
        addListeners();
        fileDialog.setSize(SIZE, SIZE);
        String file = fileDialog.getFile();
        File curFile = ((file != null) ? new File(file) : null);
        File curFolder = ((curFile != null) ?
                     curFile.getParentFile() : getDefaultFolder());
        changeDirectory(curFolder);
        if (curFile != null) {
            fileName.setText(file);
        }
        fillChoice();
        shown = true;
    }
    return true; // call Dialog's show()
}

private static void paintTriangle(final Graphics g, final int[] x, final int[] y,
                                  final boolean isEnabled) {


    g.setColor(isEnabled ? arrowColor : SystemColor.controlShadow);
    g.fillPolygon(new Polygon(x, y, x.length));
    if (!isEnabled) {
        g.setColor(SystemColor.controlHighlight);
        int x1 = x[0] + 1;
        int y1 = y[0] + 1;
        int x2 = x[1] + 1;
        int y2 = y[1] + 1;
        g.drawLine(x1, y1, x2, y2);
    }

}

private static void drawItem(int idx, Graphics g, ListState s) {        
    Rectangle itemRect = s.getItemBounds(idx);
    itemRect.width = s.getClient().width - itemRect.x + 1;
    int itemHeight = itemRect.height;        
    if (s.isSelected(idx)) {
        g.setColor(SystemColor.textHighlight);
        ((Graphics2D)g).fill(itemRect);
        g.setColor(SystemColor.textHighlightText);
    }
    String item = s.getItem(idx);
    FontMetrics fm = s.getFontMetrics();
    int baseLineOffset = itemHeight - fm.getDescent() - 1;
    g.drawString(item, itemRect.x + 1, baseLineOffset + itemRect.y);

    if (s.isSelected(idx)) {
        g.setColor(s.getTextColor());
    }
}

public static void drawBackground(Graphics g, ButtonState s) {
    Rectangle rect = s.getBounds();
    Color bkColor = s.isBackgroundSet() ? s.getBackground() :
                                          SystemColor.control;
    g.setColor(bkColor);
    g.fillRect(0, 0, rect.width, rect.height);

    drawButtonFrame(g, s.getBounds(), s.isPressed());

    if (s.isFocused()) {
        Color foreColor = s.isTextColorSet() ?
                s.getTextColor() :
                SystemColor.controlText;
        g.setColor(foreColor);

        drawFocusRect(g, 3, 3, rect.width - 7, rect.height - 7);
    }
}

public static void drawButtonFrame(Graphics g, Rectangle rect, boolean pressed) {
    if (pressed) {
        g.setColor(SystemColor.controlHighlight);
        g.drawLine(rect.width - 1, 0, rect.width - 1, rect.height - 1);
        g.drawLine(0, rect.height - 1, rect.width - 1, rect.height - 1);
        g.setColor(SystemColor.controlShadow);
        g.drawLine(1, 1, rect.width - 3, 1);
        g.drawLine(1, 1, 1, rect.height - 3);
        g.setColor(SystemColor.controlDkShadow);
        g.drawLine(0, 0, rect.width - 2, 0);
        g.drawLine(0, 0, 0, rect.height - 2);
    } else {
        g.setColor(SystemColor.controlHighlight);
        g.drawLine(0, 0, rect.width - 1, 0);
        g.drawLine(0, 0, 0, rect.height - 1);
        g.setColor(SystemColor.controlShadow);
        g.drawLine(rect.width - 2, 1, rect.width - 2, rect.height - 2);
        g.drawLine(1, rect.height - 2, rect.width - 2, rect.height - 2);
        g.setColor(SystemColor.controlDkShadow);
        g.drawLine(rect.width - 1, 0, rect.width - 1, rect.height - 1);
        g.drawLine(0, rect.height - 1, rect.width - 1, rect.height - 1);
    }
}

private static void drawPressedRect(Graphics g, Rectangle rect,
                                    boolean pressed) {
    int w = rect.width;
    int h = rect.height;
    int x = rect.x;
    int y = rect.y;
    g.setColor(SystemColor.controlHighlight);

    g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
    g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
    g.setColor(SystemColor.controlShadow);
    g.drawLine(x + 1, y + 1, x + w - 3, y + 1);
    g.drawLine(x + 1, y + 1, x + 1, y + h - 3);
    g.setColor(SystemColor.controlDkShadow);
    g.drawLine(x, y, x + w - 2, y);
    g.drawLine(x, y, x, y + h - 2);
    g.setColor(pressed ? pressedColor : SystemColor.window);
    g.fillRect(x+2, y+2, CB_SIZE - 2, CB_SIZE - 2);
}

private static void drawPressedCircle(Graphics g, Rectangle rect,
                                      boolean pressed) {
    int w = rect.width;
    int h = rect.height;
    int x = rect.x;
    int y = rect.y;

    g.setColor(SystemColor.controlShadow);
    int startAngle = 45;
    int angle = 180;
    int endAngle = startAngle + angle;
    g.drawArc(x, y, w, h, startAngle, angle);
    g.setColor(SystemColor.controlDkShadow);
    g.drawArc(x + 1, y + 1, w - 1, h - 1,  startAngle, angle);

    g.setColor(SystemColor.controlHighlight);
    g.drawArc(x, y, w, h, endAngle, angle);
    g.setColor(SystemColor.controlLtHighlight);
    g.drawArc(x + 1, y + 1, w - 1, h - 1, endAngle, angle);
    g.setColor(pressed ? pressedColor : SystemColor.window);
    g.fillOval(x+2, y+2, CB_SIZE - 2, CB_SIZE - 2);

}

/**
 * Returns the default background color to use for tool tip windows.
 *
 * @return The default background color.
 */
public static Color getToolTipBackground() {

    Color c = UIManager.getColor("ToolTip.background");

    // Tooltip.background is wrong color on Nimbus (!)
    boolean isNimbus = isNimbusLookAndFeel();
    if (c==null || isNimbus) {
        c = UIManager.getColor("info"); // Used by Nimbus (and others)
        if (c==null || (isNimbus && isDerivedColor(c))) {
            c = SystemColor.info; // System default
        }
    }

    // Workaround for a bug (?) with Nimbus - calling JLabel.setBackground()
    // with a ColorUIResource does nothing, must be a normal Color
    if (c instanceof ColorUIResource) {
        c = new Color(c.getRGB());
    }

    return c;

}