synthinternalframetitlepane.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

            else if (frame.isClosable()) {
                lastButton = closeButton;
            }
            int maxX;
            int minX;
            boolean ltr = SynthLookAndFeel.isLeftToRight(frame);
            int titleAlignment = this.titleAlignment;
            if (ltr) {
                if (lastButton != null) {
                    maxX = lastButton.getX() - titleSpacing;
                }
                else {
                    maxX = frame.getWidth() - frame.getInsets().right -
                           titleSpacing;
                }
                minX = menuButton.getX() + menuButton.getWidth() +
                       titleSpacing;
            }
            else {
                if (lastButton != null) {
                    minX = lastButton.getX() + lastButton.getWidth() +
                           titleSpacing;
                }
                else {
                    minX = frame.getInsets().left + titleSpacing;
                }
                maxX = menuButton.getX() - titleSpacing;
                if (titleAlignment == SwingConstants.LEADING) {
                    titleAlignment = SwingConstants.TRAILING;
                }
                else if (titleAlignment == SwingConstants.TRAILING) {
                    titleAlignment = SwingConstants.LEADING;
                }
            }
            String clippedTitle = getTitle(title, fm, maxX - minX);
            if (clippedTitle == title) {
                // String fit, align as necessary.
                if (titleAlignment == SwingConstants.TRAILING) {
                    minX = maxX - style.getGraphicsUtils(context).
                        computeStringWidth(context, g.getFont(), fm, title);
                }
                else if (titleAlignment == SwingConstants.CENTER) {
                    int width = style.getGraphicsUtils(context).
                           computeStringWidth(context, g.getFont(), fm, title);
                    minX = Math.max(minX, (getWidth() - width) / 2);
                    minX = Math.min(maxX - width, minX);
                }
            }
            style.getGraphicsUtils(context).paintText(
                context, g, clippedTitle, minX, baseline - fm.getAscent(), -1);
	}
    }

    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintInternalFrameTitlePaneBorder(context,
                                                            g, x, y, w, h);
    }

    protected LayoutManager createLayout() {
        SynthContext context = getContext(this);
	LayoutManager lm =
	    (LayoutManager)style.get(context, "InternalFrameTitlePane.titlePaneLayout");
	context.dispose();
        return (lm != null) ? lm : new SynthTitlePaneLayout();
    }

    public void propertyChange(PropertyChangeEvent evt) {
        if (evt.getSource() == this) {
            if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
                updateStyle(this);
            }
        }
        else {
            // Changes for the internal frame
            if (evt.getPropertyName() == JInternalFrame.FRAME_ICON_PROPERTY) {
                updateMenuIcon();
            }
        }
    }

    /**
     * Resets the menuButton icon to match that of the frame.
     */
    private void updateMenuIcon() {
        Icon frameIcon = frame.getFrameIcon();
        SynthContext context = getContext(this);
        if (frameIcon != null) {
            Dimension maxSize = (Dimension)context.getStyle().get(context,
                                "InternalFrameTitlePane.maxFrameIconSize");
            int maxWidth = 16;
            int maxHeight = 16;
            if (maxSize != null) {
                maxWidth = maxSize.width;
                maxHeight = maxSize.height;
            }
            if ((frameIcon.getIconWidth() > maxWidth ||
                     frameIcon.getIconHeight() > maxHeight) && 
                    (frameIcon instanceof ImageIcon)) {
                frameIcon = new ImageIcon(((ImageIcon)frameIcon).
                             getImage().getScaledInstance(maxWidth, maxHeight,
                             Image.SCALE_SMOOTH));
            }
        }
        context.dispose();
        menuButton.setIcon(frameIcon);
    }


    class SynthTitlePaneLayout implements LayoutManager {
        public void addLayoutComponent(String name, Component c) {}
        public void removeLayoutComponent(Component c) {}    
        public Dimension preferredLayoutSize(Container c)  {
	    return minimumLayoutSize(c);
	}
    
        public Dimension minimumLayoutSize(Container c) {
            SynthContext context = getContext(
                             SynthInternalFrameTitlePane.this);
            int width = 0;
            int height = 0;
 
            int buttonCount = 0;
            Dimension pref;

            if (frame.isClosable()) {
                pref = closeButton.getPreferredSize();
                width += pref.width;
                height = Math.max(pref.height, height);
                buttonCount++;
            }
            if (frame.isMaximizable()) {
                pref = maxButton.getPreferredSize();
                width += pref.width;
                height = Math.max(pref.height, height);
                buttonCount++;
            }
            if (frame.isIconifiable()) {
                pref = iconButton.getPreferredSize();
                width += pref.width;
                height = Math.max(pref.height, height);
                buttonCount++;
            }
            pref = menuButton.getPreferredSize();
            width += pref.width;
            height = Math.max(pref.height, height);

            width += Math.max(0, (buttonCount - 1) * buttonSpacing);

            FontMetrics fm = SynthInternalFrameTitlePane.this.getFontMetrics(
                                          getFont());
            SynthGraphicsUtils graphicsUtils = context.getStyle().
                                       getGraphicsUtils(context);
            String frameTitle = frame.getTitle();
            int title_w = frameTitle != null ? graphicsUtils.
                               computeStringWidth(context, fm.getFont(),
                               fm, frameTitle) : 0;
            int title_length = frameTitle != null ? frameTitle.length() : 0;

            // Leave room for three characters in the title.
            if (title_length > 3) {
                int subtitle_w = graphicsUtils.computeStringWidth(context,
                    fm.getFont(), fm, frameTitle.substring(0, 3) + "...");
                width += (title_w < subtitle_w) ? title_w : subtitle_w;
            } else {
                width += title_w;
            }

            height = Math.max(fm.getHeight() + 2, height);

            width += titleSpacing + titleSpacing;

            Insets insets = getInsets();
            height += insets.top + insets.bottom;
            width += insets.left + insets.right;
            context.dispose();
            return new Dimension(width, height);
	}
    
        private int center(Component c, Insets insets, int x,
                           boolean trailing) {
            Dimension pref = c.getPreferredSize();
            if (trailing) {
                x -= pref.width;
            }
            c.setBounds(x, insets.top +
                        (getHeight() - insets.top - insets.bottom -
                         pref.height) / 2, pref.width, pref.height);
            if (pref.width > 0) {
                if (trailing) {
                    return x - buttonSpacing;
                }
                return x + pref.width + buttonSpacing;
            }
            return x;
        }

        public void layoutContainer(Container c) {
            Insets insets = c.getInsets();
            Dimension pref;

            if (SynthLookAndFeel.isLeftToRight(frame)) {
                center(menuButton, insets, insets.left, false);
                int x = getWidth() - insets.right;
                if (frame.isClosable()) {
                    x = center(closeButton, insets, x, true);
                }
                if (frame.isMaximizable()) {
                    x = center(maxButton, insets, x, true);
                }
                if (frame.isIconifiable()) {
                    x = center(iconButton, insets, x, true);
                }
            }
            else {
                center(menuButton, insets, getWidth() - insets.right,
                       true);
                int x = insets.left;
                if (frame.isClosable()) {
                    x = center(closeButton, insets, x, false);
                }
                if (frame.isMaximizable()) {
                    x = center(maxButton, insets, x, false);
                }
                if (frame.isIconifiable()) {
                    x = center(iconButton, insets, x, false);
                }
            }
        }
    }

    private JButton createNoFocusButton() {
        JButton button = new JButton();
        button.setFocusable(false);
        button.setMargin(new Insets(0,0,0,0));
        return button;
    }
}