1. Handling User Events with Swing
Program Swing:
May re-do old Java program
Update it using Swing

2. Swing Handles Different through use of classes of event listners
ActionListener =click on button
AdjustmentListener like scrollbar move
FocusListener = keyboard (text field)
ItemListener = like check box change
KeyListener = enter text from keys

3. More Swing Handles MouseListener = clicks or moves out of area
MouseMotionListener = mouse moves
track it
WindowListener = max, min, move, close it
public class Suspense extends Jframe implements ActionListner, TextListener { …}

4. Setting up Components addActionListener( ) Jbutton….
addAdjustmentListener ( ) JScrollBar …
addFocusListener( ) All Swing Components
addItemListener ( ) ..Jbutton …
addKeyListener ( ) All Swing Components
addMouseListener( ) “ “
addMouseMotionListener( ) “ “

5. Last few addMouseMotionListener( ) All Swing Components
addWindowListener( ) All Jwindow and Jframe Components
Jbutton zap = new Jbutton( “Zap”);
zap.addActionListener(this);

6. Program CHANGETITLE.JAVA
Results of execution “Rosencrantz” “Guildenstern”

7. Working with Methods Action Events
Jbutton, JCheckBox, JTextField, Jradio
actionPerformed(ActionEvent evt) { ….}

8. Statements create JButton & JTextField
Jbutton sort = new Jbutton(“Sort”);
JTextField name = new JTextField( );
sort.setActionCommand(“Sort Files:);
name.setActionCommand(“Sort Files”);
Both cause same thing to happen

9. Adjustment Events
Happen when JScrollBar component moved by means of arrows on the bar, box, clicks
public void adjustmentValueChanged(AdjustmentEvent evt) { …}

10. AdjustmentEvent object’s getAdjustmentType( ) method
UNIT-INCREMENT = +1
UNIT_DECREMENT = -1
BLOCK_INCREMENT = LARGER INCREASE
BLOCK_DECREMENT = LARGER DECREASE
TRACK = VALUE CHANGE - moving the box

11. WellAdjusted.java
A scrollbar showing an integer of where the thumb button is in relation to the bar (position)

12. Null String In last program “ “ is a null String.
The int value concatenated into a String
“ “ + 73 is then a String “ 73”
Focus Events = a gain/loss of focus on GUI
The blinking field is in focus = text may then be entered

13. More Focus Events public void focusGained(FocusEvent evt) {…}
public void focusLost(FocusEvent evt) { …}
Determine which object has gained/lost focus

14. Item Events Occur when an item is selected/deselected
(Jbutton, JCheckBox, JComboBox,JRadioButton)
void itemStateChanged(ItemEvent evt) { …}

15. SelectItem.java Source code
Produces output
Which
pick.additem(“ text of item”);
Scroll down button click on item desired
Text of item displayed

16. Key Events Occur when a key is pressed on the keyboard
public void keyTyped(KeyEvent evt) {…}

17. Mouse Events A mouse click A mouse enters component’s area
A mouse leaves “ “
MouseListener (5) Events:
mouseClicked(MouseEvent) …ALSO
mouseEntered, mouseExited, mousePressed, mouseReleased
public void mouseReleased(MouseEvent evt) {…}.

18. More Mouse stuff getClickCount( ) getPoint( ) getX( ) getY( )
MOUSE-MOVEMENT EVENTS
mouseDragged(MouseEvent evt) …
mouseMoved(MouseEvent evt)...

19. Swing with old SPOTS & LINES Program
A possible suggestion
import java.awt.swing.*;
With your old Spots/Lines program

20. Window Events WindowActivated(WindowEvent) windowClosed( )
windowClosing( )
windowDeactivated( )
windowDeiconified( )
windowIconified()
windowOpened( )

21. Last Progam SwingColorTest.java
Output Same as Old ColorTest program
Red - Green - Blue OR Hue Saturation Brightness BUT with Swing
Text official web site