Basic Java Gui

Mr.Vuttichai Vicheanchai (Onizuka) [email protected]

java.awt • java.awt package (Abstract Window Toolkit) supports GUI operations. • Contains all of the classes for creating user interfaces and for painting graphics and images. • AWT Component • AWT Event  We leave it for next lesson

AWT Components hierarchy

Frame • ต้อง import java.awt.*; • Constructor Frame() , Frame(String title) • Method setTitle(String title) setResizable(boolean resizable) setVisible(boolean resizable) setSize(int width,int height)

ถ้าอยากจะปิด Frame ต้องสร้าง method ต่อไปนี้ public boolean handleEvent(Event e){ if(e.id == Event.WINDOW_DESTROY){ System.exit(0); } return super.handleEvent(e); }

JFrame • ต้อง import java.awt.*; • Constructor JFrame() , JFrame(String title) • Method setTitle(String title) setResizable(boolean resizable) setVisible(boolean resizable) setSize(int width,int height) setDefaultCloseOperation(EXIT_ON_CLOSE)

Component • • • • •

Frame Button TextField TextArea Label

Layout • • • •

BorderLayout GridLayout FlowLayout null

Etc

• Color • Font • Cursor

Frame

Button

javax.swing Component - JFrame - JButton - JTextArea - JScrollPane - JCheckBox - JLabel

BorderLayout

GridLayout

FlowLayout

null Layout

JOptionPane JOptionPane.showMessageDialog(null,”Message”,”title message”,JOptionPane.??? , icon) int x = JOptionPane.show?Dialog(null,”Message”,”title message”,JOptionPane.??,JOptionPane.???, icon , “botton1”,”button2”, “default button”) ? = Input or Confirm or Option ?? = YES_NO_OPTION or OK_CANCEL_OPTION or CANCEL_OPTION or NO_OPTION or CLOSED_OPTION or YES_OPTION ??? = WARNING_MESSAGE or INFORMATION_MESSAGE or ERROR_MESSAGE or PLAIN_MESSAGE

Event Listener and Event Class •

KeyListener and KeyEvent (All Component) public void keyPressed(KeyEvent e) = กด public void keyReleased(KeyEvent e) = ปล่อย public void keyTyped(KeyEvent e) = ทั้งกดและปล่อย

1.1 KeyEvent Class => important constant and method KEY_FIRST

KEY_LAST

VK_BACK_SPACE VK_TAB

VK_CANCEL

VK_SHIFT

VK_CONTROL

VK_ENTER

VK_ALT

VK_PAUSE

VK_CAPS_LOCK

VK_ESCAPE

VK_PAGE_UP

VK_PAGE_DOWN VK_END

VK_HOME

VK_LEFT

VK_RIGHT

VK_DOWN

VK_0,VK_1,…,VK_9

VK_F1,…,VK_F24

getKeyCode()

getKeyChar()

getKeyText(int keyCode)

isActionKey()

isAltDown()

isControlDown()

isShiftDown()

int primitive return int

return boolean

return char

return String

•

MouseListener , MouseMotionListener and MouseEvent (All Component) 2.1 MouseListener public void mouseClicked(MouseEvent e) = คลิก public void mouseEntered(MouseEvent e) = นำาเม้าส์เข้าไป public void mouseExited(MouseEvent e) = นำาเม้าส์ออก public void mousePressed(MouseEvent e) = กด public void mouseReleased(MouseEvent e) = ปล่อยเม้าส์ขวา

2.2 MouseMotionListener public void mouseDragged(MouseEvent e) = คลิกลาก public void mouseMoved(MouseEvent e) = เคลื่อนที่

2.3 MouseEvent Class => important constant and method public static final int NOBUTTON public static final int BUTTON1 public static final int BUTTON2 public static final int BUTTON3 public int getX() public int getY() public Point getPoint() public int getClickCount() public int getButton() public boolean isPopupTrigger() public void translatePoint(int x,int y) public static String getMouseModifiersText(int modifiers)

3. ActionListener and ActionEvent (Use to Button component) JButton

JToggleButton JTextComponent JMenuItem JCheckBoxMenuItem JRadioButton JRadioButtonMenuItem JComboBox JFileChooser JCheckBox JScrollbar

3.1 ActionListener public void actionPerformed(ActionEvent e) = คลิก หรือ enter

3.2 ActionEvent Class => important constant and method public static final SHIFT_MASK public static final int CTRL_MASK public static final int META_MASK public static final int ALT_MASK public String getActionCommand() public int getModifiers() public Point getWhen()