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					Swing Components III


   Chapter 12 - Student

   JFrame, Component Methods
JFrame windows
Window

   Mostly used for ____________
   Generic type that _______ and Dialog inherit
   3 important methods:
       dispose() – eliminate ___________ when done
       pack() – __________ to fit added components
       setVisible(boolean) – make the window appear




                       (c) 2005 by Elizabeth Sugar Boese
JFrame
   Uses ____________ by default

   Possible ornaments:
      Title
      ____________
      Menu
      ____________
      Widgets to hide/minimize/grow

   Methods:
      Constructors:
           JFrame()
           JFrame( String title)
       setBounds( w, h )
       setSize( w, h )

                                (c) 2005 by Elizabeth Sugar Boese
JFrame                                                       text is the title
   Create a JFrame window                                   on the JFrame
    JFrame frame;
    frame = new JFrame( text );
   Set the ____________ on the screen (optional)
        frame.setLocation( 500, 600 );
   Major Steps
    1. ______________________.
        JFrame frame; frame = new JFrame("FrameDemo");
    2. Set ________________
        frame.setLayout( new BorderLayout( ) );
    3. Create components and _________________________
        JButton go = new JButton( "Go for it!" );
        frame.add(universe, BorderLayout.SOUTH);
                                                                                Calling the .pack( )
    4. _________ the frame.                                                    method will size the
        frame.pack();                                                          frame based on the
                                                                             minimum size to fit all the
    OR frame.setSize( 200, 500 );
                                                                              components added to
    5. Show it.                                                                      the frame.
        frame.setVisible(true);

                                         (c) 2005 by Elizabeth Sugar Boese
JFrame – Simple Example
import javax.swing.*;
public class JFrameDefault extends JApplet
{
  JFrame frame;
  public void init( )
  {
    frame = new JFrame( "Testing JFrame stuff" );
    frame.setSize( 200,100 );
    frame.setVisible( true );
  }
}




                           (c) 2005 by Elizabeth Sugar Boese
JFrame – Example with components
import java.awt.*;
import javax.swing.*;
public class JFrameStuff extends JApplet
{
  JFrame frame;
  JLabel myname, universe;
  JButton go, skiing;
  public void init( )
  {
     //1. Create the frame.
     frame = new JFrame("FrameDemo");
     //2. Set layout manager
     frame.setLayout( new BorderLayout( ) );
     //3. Create components and put them in the frame.
     myname = new JLabel( "<HTML>My <BR>Stuff", JLabel.CENTER );
     go = new JButton( "Go for it!" );
     skiing = new JButton( "Do you like skiing too?" );
     universe = new JLabel( "I live at the borders of the universe where fact and fiction collide" );
     frame.add(myname, BorderLayout.NORTH);
     frame.add(go, BorderLayout.WEST);
     frame.add(skiing, BorderLayout.EAST);
     frame.add(universe, BorderLayout.SOUTH);

        //4. Size the frame.
        frame.pack( );
        //5. Show it.
        frame.setVisible(true);
    }
}



                                                   (c) 2005 by Elizabeth Sugar Boese
JFrame Closing Behaviors

   When user selects window manager Close option
    for JFrame, has default behavior
       JFrame did nothing
       JFrame hides itself

   setDefaultCloseOperation (operation)
       DO_NOTHING_ON_CLOSE
       HIDE_ON_CLOSE
       DISPOSE_ON_CLOSE
       No EXIT_ON_CLOSE operation




                          (c) 2005 by Elizabeth Sugar Boese
JFrame - Events

   usually want to pop open a JFrame based on
    an event (e.g. a button click)
   Example




                  (c) 2005 by Elizabeth Sugar Boese
Dialogs


   (extra material)
JOptionPane Examples




            (c) 2005 by Elizabeth Sugar Boese
Dialog

   For simple _______________ with user
   Uses _______________ by default
   Are _____ by default (can change to modeless setModal(false)
   Constructors:
       Dialog( Frame parent )
       Dialog( Frame parent, String title )
       Dialog( Frame parent, boolean isModal )
   Call to super( )




                            (c) 2005 by Elizabeth Sugar Boese
Dialog Example

Frame frame = new Frame( );
Dialog d = new Dialog( frame, “Hi there”, true );
JButton button = new JButton( “Okay?” );
JPanel panel = new JPanel();
p.add( button );
d.add( panel );
d.setSize( 400,100 );
d.setVisible( true );


                     (c) 2005 by Elizabeth Sugar Boese
Menu


  (extra material)
Menu

   MenuBar
       Collection of Menus
       Associated with a Frame
   Menu
       Collection of MenuItems and separators
       Can be a MenuItem for hierarchical menus
   MenuItem
       Enabled or disabled
       May be checkable




                        (c) 2005 by Elizabeth Sugar Boese
Component Methods
Component Methods

   Common methods works on most
    components (e.g. JLabel, JButton, JPanel,
    etc.)
       setBackground ( Color )
       setForeground ( Color )
       setBorder ( Border )
       setFont ( Font )
       setToolTipText( String )
       setVisible ( boolean )

                        (c) 2005 by Elizabeth Sugar Boese
Component Methods - JButton

   JButton
       addActionListener ( this )
       setBorderPainted ( boolean )
       setContentAreaFilled ( boolean )
       setDisabledIcon ( ImageIcon )                       Parameter int one
       setIcon ( ImageIcon )                                      of:
                                                              JButton.LEFT
       setHorizontalAlignment ( int )                      JButton.CENTER
                                                             JButton.RIGHT
       setHorizontalTextPosition ( int )
       setRolloverIcon ( ImageIcon )
       setText ( String )

                        (c) 2005 by Elizabeth Sugar Boese
Component Methods – JCheckbox,
JRadioButton
   JCheckbox and JRadioButton
       addItemListener ( this )
                                                     Returns true if
       isSelected ( )                             currently selected,
                                                       false if not
                                                        selected




                        (c) 2005 by Elizabeth Sugar Boese
Component Methods - JLabel

   JLabel
       setIcon ( ImageIcon )
       setText ( String )




                       (c) 2005 by Elizabeth Sugar Boese
Component Methods - text

   JTextField
       getText ( )
       setText ( )


   JTextArea
       append ( String )
       getText ( )
       setLineWrap ( boolean )
       setText ( String )
       setWrapStyleWord ( boolean )


                         (c) 2005 by Elizabeth Sugar Boese
Summary

   JFrame
   Dialogs
   Menu
   Component methods




                (c) 2005 by Elizabeth Sugar Boese

				
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