actionmenubar.java

这是linux下ssl vpn的实现程序

        }

        public void setMenu(ActionMenu menu) {
            this.menu = menu;
            menuCanvas.sel = -1;
        }

        public void paint(Graphics ig) {
            Dimension s = getSize();
            if (backingStore == null
                            || (backingStore != null && (s.width != backingStore.getWidth(this) || s.height != backingStore
                                            .getHeight(this)))) {
                if (backingStore != null) {
                    backingStore.getGraphics().dispose();
                }
                backingStore = createImage(s.width, s.height);
            }
            Graphics g = backingStore.getGraphics();
            g.setColor(getBackground());
            g.fillRect(0, 0, s.width - 1, s.height - 1);
            int px = 0;
            int py = 0;
            g.setColor(borderColor);
            for (int i = 0; i < borderWidth; i++) {
                g.drawRect(px, py, s.width - px - 1, s.height - py - 1);
                px++;
                py++;
            }
            if (insets != null) {
                px += insets.left;
                py += insets.top;
            }
            if (menu != null) {
                Action m = null;
                FontMetrics fm = getFontMetrics(getFont());
                //                py += fm.getHeight() - fm.getDescent();
                int i = 0;
                for (Enumeration e = menu.children(); e.hasMoreElements();) {
                    m = (Action) e.nextElement();
                    if(m.getName().equals(ActionMenu.SEPARATOR.getName())) {
                        int h = separator.getPreferredSize().height;
                        int sw = s.width - ( insets == null ? 0 : ( ( insets.left + insets.right ) / 2 ) ) - ( borderWidth * 2 );
                        separator.setBounds(0, 0, sw, h);
                        int sx = (s.width - sw ) / 2;
                        g.translate(sx, py);
                        separator.paint(g);
                        g.translate(-sx, -py);
                        py += h;
                    }
                    else {
	                    String n = (String) m.getValue(Action.SHORT_DESCRIPTION);
	                    n = n == null ? m.getName() : n;
	                    if (m.isEnabled()) {
	                        if (i == sel) {
	                            g.setColor(selectionBackground);
	                            int ty = borderWidth + (insets != null ? insets.top : 0) + (py - borderWidth - insets.top );
	                            g.fillRect(borderWidth, ty, s.width - (borderWidth * 2), itemHeight);
	                            if (borderWidth != 0) {
	                                g.setColor(borderColor);
	                                g.drawLine(borderWidth, ty, (borderWidth * 2) + s.width - 1, ty);
	                                g.drawLine(borderWidth, ty + itemHeight - 1, (borderWidth * 2) + s.width - 1, ty + itemHeight - 1);
	                            }
	                            g.setColor(selectionForeground);
	                        } else {
	                            g.setColor(getForeground());
	                        }
	                    } else {
	                        g.setColor(disabledForeground);
	                    }
	                    String imagePath = null;
	                    if (iconType.equals(ActionButton.SMALL_ICONS)) {
	                        imagePath = (String) m.getValue(Action.SMALL_IMAGE_PATH);
	                    } else if (iconType.equals(ActionButton.LARGE_ICONS)) {
	                        imagePath = (String) m.getValue(Action.IMAGE_PATH);
	                    }
	                    int toff = 0;
	                    if (imagePath != null) {
	                        Image img = UIUtil.loadImage(m.getClass(), imagePath);
	                        if(!m.isEnabled()) {
	                            img = createImage(new FilteredImageSource(img.getSource(),
	                            new GrayFilter()));
	                            UIUtil.waitFor(img, this);
	                        }
	                        
	                        if (img != null) {
	                            g.drawImage(img, px, py + ((itemHeight - img.getHeight(this)) / 2), this);
	                            toff = imageTextGap + img.getWidth(this);
	                        }
	                    }
	                    g.drawString(n, px + toff, py + fm.getHeight() - fm.getDescent() + ((itemHeight - fm.getHeight()) / 2));
	                    py += itemHeight;
                    }
                    i++;
                }
            }
            ig.drawImage(backingStore, 0, 0, this);
        }

        int getIndexForLocation(int x, int ey) {
            int idx = -1;
            if (menu != null && getGraphics() != null) {
                int y = borderWidth;
                if (insets != null) {
                    y += insets.top;
                }
                FontMetrics fm = getFontMetrics(getFont());
                Action m = null;
                for (Enumeration e = menu.children(); e.hasMoreElements();) {
                    idx++;
                    m = (Action) e.nextElement();                   
                    if(!m.getName().equals(ActionMenu.SEPARATOR.getName())) {
                        y+= itemHeight;
                        if(y >= ey) {
                            return idx;
                        }
                    }
                    else {
                        y += separator.getPreferredSize().height;
                    }
                }
            }
            return idx;
        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
         */
        public void mouseDragged(MouseEvent e) {
            // TODO Auto-generated method stub

        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseMotionListener#mouseMoved(java.awt.event.MouseEvent)
         */
        public void mouseMoved(MouseEvent e) {
            sel = getIndexForLocation(e.getX(), e.getY());
            if (sel != -1) {
                Action action = menu.getChild(sel);
                if (action.isEnabled()) {
                    String tip = (String) action.getValue(Action.LONG_DESCRIPTION);
                    if (tip != null) {
                        Point p = getLocationOnScreen();
                        if (toolTipsEnabled) {
                            ToolTipManager.getInstance().requestToolTip(this, p.x + e.getX() + 4, p.y + e.getY() + 4, tip);
                        }
                    }
                } else {
                    sel = -1;
                    if (toolTipsEnabled) {
                        ToolTipManager.getInstance().hide();
                    }
                }
                repaint();
            }
        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
         */
        public void mouseClicked(MouseEvent e) {
            if ((e.getModifiers() & MouseEvent.BUTTON1_MASK) != 0) {
                int clicked = getIndexForLocation(e.getX(), e.getY());
                if (clicked != -1 && clicked < menu.getChildCount()) {
                    Action action = menu.getChild(clicked);
                    action.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, action.getName(), e.getModifiers()));
                }
            }
            hideMenuWindow();

        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
         */
        public void mousePressed(MouseEvent e) {
            // TODO Auto-generated method stub

        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
         */
        public void mouseReleased(MouseEvent e) {
            // TODO Auto-generated method stub

        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
         */
        public void mouseEntered(MouseEvent e) {
            // TODO Auto-generated method stub

        }

        /*
         * (non-Javadoc)
         * 
         * @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
         */
        public void mouseExited(MouseEvent e) {
            // TODO Auto-generated method stub

        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.FocusListener#focusGained(java.awt.event.FocusEvent)
     */
    public void focusGained(FocusEvent e) {
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.FocusListener#focusLost(java.awt.event.FocusEvent)
     */
    public void focusLost(FocusEvent e) {
        hideMenuWindow();
    }

    /**
     *  
     */
    public void removeAllMenuItems() {
        for (Enumeration e = menus.elements(); e.hasMoreElements();) {
            MenuAction act = (MenuAction) e.nextElement();
            for (Enumeration e2 = act.menu.children(); e2.hasMoreElements();) {
                Action a = (Action) e2.nextElement();
                a.removePropertyChangeListener(this);
            }
        }
        hideMenuWindow();
        menus.removeAllElements();
        removeAll();
        doLayout();
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.ComponentListener#componentResized(java.awt.event.ComponentEvent)
     */
    public void componentResized(ComponentEvent e) {
        hideMenuWindow();
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.ComponentListener#componentMoved(java.awt.event.ComponentEvent)
     */
    public void componentMoved(ComponentEvent e) {
        hideMenuWindow();
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.ComponentListener#componentShown(java.awt.event.ComponentEvent)
     */
    public void componentShown(ComponentEvent e) {
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.awt.event.ComponentListener#componentHidden(java.awt.event.ComponentEvent)
     */
    public void componentHidden(ComponentEvent e) {
        hideMenuWindow();
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.beans.PropertyChangeListener#propertyChange(java.beans.PropertyChangeEvent)
     */
    public void propertyChange(PropertyChangeEvent evt) {
        repaint();
    }

    /**
     * @param background
     */
    public void setBaseBackground(Color baseBackground) {
        setBackground(baseBackground == null ? SystemColor.control : baseBackground);
        this.baseBackground = baseBackground;
        for(Enumeration e = menus.elements(); e.hasMoreElements(); ) {
            MenuAction m = (MenuAction)e.nextElement();
            m.button.setBaseBackground(baseBackground);
        }
        if(menuCanvas != null) {
            menuCanvas.setBaseBackground(baseBackground);
        }
    }

    /**
     * @param background
     */
    public void setBaseForeground(Color baseForeground) {
        setForeground(baseForeground == null ? SystemColor.controlText : baseForeground);
        this.baseForeground = baseForeground;
        for(Enumeration e = menus.elements(); e.hasMoreElements(); ) {
            MenuAction m = (MenuAction)e.nextElement();
            m.button.setBaseForeground(baseForeground);
        }
        if(menuCanvas != null) {
            menuCanvas.setBaseForeground(baseForeground);
        }
    }
}