1. Computer Science A 11: 20/2

2. Java and swing Graphics programming: Windows with menus Buttons, textfields, scroll panels etc Animations, images, Events from mouse clicks, keyboard etc. Can be quite complicated…

3. EmptyFrame.java import javax.swing.JFrame; public class EmptyFrame{ public static void main(String args[]){ JFrame frame=new JFrame("EmptyFrame"); frame.setSize(600,600); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }

4. EmptyFrame

5. Add a canvas to the window public static void main(String args[]){ JFrame frame=new JFrame(); frame.setSize(600,600); frame.setTitle("DrawShapes"); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); JCanvas canvas = new JCanvas(); frame.add(canvas); frame.setVisible(true);.. }

6. Coordinate system:

7. drawLine(135,230,335,370)

8. drawOval(135,230,200,140)

9. What to draw on a canvas: Line Oval/ellipsis Arcs (parts of an ellipsis Rectangles Curves, quadratic, qubic, bezier Images Text

10. The state when drawing: Current Font Current Stroke (width of lines) Current Paint (color of areas) Current Transform (scaling, rotation, deformation of drawings) Current Composite (new items can be made partially transparent Current clipping area. (limit the area in which you can draw)

11. setFont(new Font("Serif",Font.BOLD,150)); drawString("(GyÑ)",50,200);

12. Paint canvas.setPaint(Color.red); canvas.fillRect(50,50,100,100); canvas.setPaint(Color.blue); canvas.fillOval(250,50,100,100); canvas.setPaint(Color.green); canvas.fillArc(450,50,100,100,45,270); canvas.setPaint(new GradientPaint( 50,350,Color.red,450,350,Color.blue)); canvas.fillRect(50,300,500,100);

13. Paint

14. More to come Transformations Partially transparent Images Other components: buttons etc Events from windows.

15. Java swing components Windows and components

16. Example

17. JLabel A bit of text and/or an icon new JLabel(”Label 1”,new IconImage(..))

18. JButton A button you can press. Text and/or an image (icon)

19. Radiobutton and checkbox Press to select or de-select

20. JTextField TextField: a line where you can enter text using the keyboard.

21. JTextArea TextArea: a multi-line area for entering text

22. JSlider A slider: select a value By dragging a knob

23. JSpinner Select a value by stepping through a bounded range of values

24. JComboBox Select a value from a drop-down list

25. JList Select an a value or an interval of values from a list