Example usage for java.awt MenuBar setHelpMenu

Introduction

In this page you can find the example usage for java.awt MenuBar setHelpMenu.

Prototype

public void setHelpMenu(final Menu m) 

Source Link

Document

Sets the specified menu to be this menu bar's help menu.

Usage

From source file:Unicode.java

/** Construct the object including its GUI */
public Unicode() {
    super("Unicode");

    Container cp = getContentPane();

    // Used both for Buttons and Menus
    ResourceBundle b = ResourceBundle.getBundle("UnicodeWidgets");

    JButton quitButton, nextButton, prevButton;
    Panel p = new Panel();
    // Make a grid, add one for labels.
    p.setLayout(new GridLayout(ROWS + 1, COLUMNS + 1));
    DecimalFormat df2d = new DecimalFormat("00");

    // Add first row, just column labels.
    p.add(new JLabel(""));
    for (int i = 0; i < COLUMNS; i++)
        p.add(new JLabel(Integer.toString(i, 16), JLabel.CENTER));

    // Add subsequent rows, each with an offset label
    for (int i = 0; i < ROWS; i++) {
        JLabel l = new JLabel("0000"); // room for max, i.e. \uFFFF
        p.add(l);//from  ww w  .j  av  a2  s .c o  m
        rowLabs[i] = l;
        for (int j = 0; j < COLUMNS; j++) {
            JLabel pb = new JLabel(" ");
            buttons[j][i] = pb;
            p.add(pb);
        }
    }

    // ActionListeners for jumping around; used by buttons and menus
    ActionListener firster = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            gotoPage(startNum = 0);
        }
    };
    ActionListener previouser = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            if (startNum > 0)
                gotoPage(startNum -= QUADSIZE);
        }
    };
    ActionListener nexter = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            if (startNum < 65535)
                gotoPage(startNum += QUADSIZE);
        }
    };
    ActionListener laster = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            gotoPage(65536 - QUADSIZE);
        }
    };

    cp.add(BorderLayout.NORTH, p);
    fontName = new JLabel("Default font", JLabel.CENTER);
    cp.add(BorderLayout.CENTER, fontName);
    Panel q = new Panel();
    cp.add(BorderLayout.SOUTH, q);
    q.add(prevButton = mkButton(b, "page.prev"));
    prevButton.addActionListener(previouser);

    q.add(nextButton = mkButton(b, "page.next"));
    nextButton.addActionListener(nexter);

    q.add(quitButton = mkButton(b, "exit"));
    quitButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            setVisible(false);
            dispose();
            System.exit(0);
        }
    });
    addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
            setVisible(false);
            dispose();
            System.exit(0);
        }
    });

    MenuItem mi; // used in various spots

    MenuBar mb = new MenuBar();
    setMenuBar(mb);

    String titlebar;
    try {
        titlebar = b.getString("program" + ".title");
    } catch (MissingResourceException e) {
        titlebar = "Unicode Demo";
    }
    setTitle(titlebar);

    ActionListener fontSelector = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            String font = e.getActionCommand();
            mySetFont(font, FONTSIZE);
        }
    };

    Menu fontMenu = mkMenu(b, "font");
    // String[] fontList = Toolkit.getDefaultToolkit().getFontList();
    String[] fontList = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
    for (int i = 0; i < fontList.length; i++) {
        fontMenu.add(mi = new MenuItem(fontList[i]));
        mi.addActionListener(fontSelector);
    }
    mb.add(fontMenu);

    gotoPageUI = new GoToPage("Unicode Page");
    centre(gotoPageUI);

    Menu vm = mkMenu(b, "page");
    vm.add(mi = mkMenuItem(b, "page", "first"));
    mi.addActionListener(firster);
    vm.add(mi = mkMenuItem(b, "page", "prev"));
    mi.addActionListener(previouser);
    vm.add(mi = mkMenuItem(b, "page", "next"));
    mi.addActionListener(nexter);
    vm.add(mi = mkMenuItem(b, "page", "last"));
    mi.addActionListener(laster);
    vm.add(mi = mkMenuItem(b, "page", "goto"));
    mi.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            Unicode.this.gotoPageUI.setVisible(true);
        }
    });
    mb.add(vm);

    Menu hm = mkMenu(b, "help");
    hm.add(mi = mkMenuItem(b, "help", "about"));
    mb.setHelpMenu(hm); // needed for portability (Motif, etc.).

    pack();
    // After packing the Frame, centre it on the screen.
    centre(this);

    // start at a known place
    mySetFont(fontList[0], FONTSIZE);
    gotoPage(startNum);
}

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