PopUp Window HOW TO?


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  1. #1
    Danny Guest

    PopUp Window HOW TO?


    Hello,

    I want a user to click on a button and then have a popup window for "HELP

    And I want to add contents into "HELP"

    I was wondering if someone could tell me or better show me
    the code to how I get java to after a user clicks on the
    button and pops up the help window?


    Looking forward to your feedback.

    dannyh@idx.com.au

  2. #2
    John Timney (MVP) Guest

    Re: PopUp Window HOW TO?

    An excellent example from Real Gagnon for you to adapt.

    Regards

    John Timney (MVP)

    import java.awt.*;
    import java.awt.event.*;
    import java.lang.*;
    import java.util.Hashtable;

    public class popupTest extends Frame
    implements ActionListener, MouseListener {

    PopupMenu pm = new PopupMenu();

    public static void main (String argv[]) {
    new popupTest();
    }

    public popupTest() {
    /*
    ** regular menu
    */
    MenuItem item = new MenuItem("file-1");
    item.addActionListener(this);
    Menu m = new Menu("file");
    m.add(item);
    item = new MenuItem("file-2");
    m.add(item);
    MenuBar mb = new MenuBar();
    mb.add(m);

    setMenuBar(mb);
    setSize(100, 100);
    setLayout(new BorderLayout());

    /*
    ** label with a popup
    */
    Label l = new Label("label");
    addPopup(l, "label");
    add(l, "North");

    /*
    ** panel with popup
    */
    Panel p = new Panel();
    p.setBackground(new Color(0).red);
    addPopup(p, "Panel");
    add(p, "Center");

    /*
    ** button with popup
    */
    Button b = new Button("button");
    addPopup(b, "button");
    add(b, "South");

    show();
    }

    public void actionPerformed(ActionEvent e) {
    /*
    ** handle actions related to popup
    */
    System.out.println("actionPerformed, event=" + e );
    // System.out.println(" command=" + e.getActionCommand());
    // System.out.println(" param=" + e.paramString());
    // System.out.println(" source=" + e.getSource());
    }


    public void mouseClicked (MouseEvent e) { }

    public void mouseEntered (MouseEvent e) { }

    public void mouseExited (MouseEvent e) { }

    public void mousePressed (MouseEvent e) {
    mouseAction(e);
    }

    public void mouseReleased (MouseEvent e) {
    mouseAction(e);
    }

    void mouseAction (MouseEvent e) {
    /*
    ** determine if we have to show a Popup
    */
    Component c = e.getComponent();
    if (e.isPopupTrigger()) {
    PopupMenu pm = getHash(c);
    pm.show(c, c.getSize().width/2, c.getSize().height/2);
    }
    }

    /*
    ** initialize a Popup for a particular Component
    */
    Hashtable popupTable = new Hashtable();

    void addPopup(Component c, String name) {
    PopupMenu pm = new PopupMenu();
    MenuItem mi = new MenuItem(name + "-1");
    mi.addActionListener(this);
    pm.add(mi);

    mi = new MenuItem(name + "-2");
    pm.add(mi);

    setHash(c, pm);
    c.add(pm);
    c.addMouseListener(this);
    }

    void setHash(Component c, PopupMenu p) {
    /*
    ** associate a Component with a particular Popup
    */
    popupTable.put(c, p);
    }

    PopupMenu getHash(Component c) {
    /*
    ** return a Popup associated with a particular Component
    */
    return (PopupMenu)(popupTable.get(c));
    }

    }




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