1 / 34

Swing

Swing. štandard od Java 2 „nadmnožina awt“ – aj ke ď len voľne chápané komponenty sa volajú Jxxxx vlastný look-and-feel Nemie šajte awt a swing komponenty javax.swing javax.swing.event …. import javax.swing.*;. awt vs. swing. JButton. import java.applet.*; import javax.swing.*;

micheal
Download Presentation

Swing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Swing • štandard od Java 2 • „nadmnožina awt“ – aj keď len voľne chápané • komponenty sa volajú Jxxxx • vlastný look-and-feel • Nemiešajte awt a swing komponenty • javax.swing • javax.swing.event • ….

  2. import javax.swing.*;

  3. awt vs. swing

  4. JButton import java.applet.*; import javax.swing.*; public class JButtonDemo extends Applet { JButton b1 = new JButton("JButton 1"), b2 = new JButton("JButton 2"); JTextField t = new JTextField(20); public void init() { ActionListener al = new ActionListener() { public void actionPerformed(ActionEvent e){ String name = ((JButton)e.getSource()).getText(); t.setText(name + " Pressed"); } }; b1.addActionListener(al); add(b1); b2.addActionListener(al); add(b2); add(t); }

  5. JFrame public static void main(String args[]) { JButtonDemo applet = new JButtonDemo(); JFrame frame = new JFrame("TextAreaNew"); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e){ System.exit(0); } }); frame.getContentPane().add(applet,BorderLayout.CENTER); frame.setSize(300,100); applet.init(); applet.start(); frame.setVisible(true); } }

  6. Buttoniáda public Buttons() { add(jb); add(new JToggleButton("JToggleButton")); add(new JCheckBox("JCheckBox")); add(new JRadioButton("JRadioButton")); JPanel jp = new JPanel(); jp.setBorder(new TitledBorder("Directions")); jp.add(up); jp.add(down); jp.add(left); jp.add(right); add(jp); } } public class Buttons extends JPanel { JButton jb = new JButton("JButton"); BasicArrowButton up = new BasicArrowButton( BasicArrowButton.NORTH), down = new BasicArrowButton( BasicArrowButton.SOUTH), right = new BasicArrowButton( BasicArrowButton.EAST), left = new BasicArrowButton( BasicArrowButton.WEST);

  7. Grupáky public class ButtonGroups extends JPanel { static String[] ids = { "zelen", "gula", "cerven", "zalud" }; static JPanel makeBPanel(Class bClass, String[] ids) { ButtonGroup bg = new ButtonGroup(); JPanel jp = new JPanel(); String title = bClass.getName(); title = title.substring( title.lastIndexOf('.') + 1); jp.setBorder(new TitledBorder(title)); for(int i = 0; i < ids.length; i++) { AbstractButton ab = new JButton("failed"); try { Constructor ctor = bClass.getConstructor(new Class[] { String.class }); ab = (AbstractButton)ctor.newInstance(new Object[]{ids[i]}); } catch(Exception ex) { System.out.println("can't create " + bClass); } bg.add(ab); jp.add(ab); } return jp; } public ButtonGroups() { add(makeBPanel(JButton.class, ids)); add(makeBPanel(JToggleButton.class, ids)); add(makeBPanel(JCheckBox.class, ids)); add(makeBPanel(JRadioButton.class, ids)); } }

  8. public interface Icon { void paintIcon(Component c, Graphics g, int x, int y); int getIconWidth(); int getIconHeight(); } Ikony ImageIcon implements Icon Icon xSign = new ImageIcon("x.gif"); Icon oSign = new ImageIcon("o.gif"); java.net.URL imgURL = ButtonDemo.class.getResource("images/right.gif"); ImageIcon leftButtonIcon = new ImageIcon(imgURL); public class RedOval implements Icon { public void paintIcon(Component c, Graphics g, int x, int y) { g.setColor(Color.red); g.drawOval (x, y, getIconWidth(), getIconHeight()); } public int getIconWidth() { return 10; } public int getIconHeight() { return 10; } }

  9. ButtIkony ImageIcon leftButtonIcon = new ImageIcon(....); . . . b1 = new JButton("Disable middle button", leftButtonIcon); b1.setVerticalTextPosition(AbstractButton.CENTER); b1.setHorizontalTextPosition(AbstractButton.LEADING); b1.setMnemonic(KeyEvent.VK_D); b1.setActionCommand("disable"); b1.addActionListener(this); b1.setToolTipText("Click this button to disable the middlebutton."); public void actionPerformed(ActionEvent e) { if ("disable".equals(e.getActionCommand())) { b2.setEnabled(false); b1.setEnabled(false); b3.setEnabled(true); } . . . .

  10. Ikony import java.awt.event.*; import javax.swing.*; public class Faces extends JPanel { static Icon[] faces = { new ImageIcon("face0.gif"), new ImageIcon("face1.gif"), new ImageIcon("face2.gif"), new ImageIcon("face3.gif"), new ImageIcon("face4.gif"), }; JButton jb = new JButton("JButton", faces[3]), jb2 = new JButton("Disable"); boolean mad = false; public Faces() { jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ if(mad) { jb.setIcon(faces[3]); mad = false; } else { jb.setIcon(faces[0]); mad = true; } jb.setVerticalAlignment(JButton.TOP); jb.setHorizontalAlignment(JButton.LEFT); } }); jb.setRolloverEnabled(true); jb.setRolloverIcon(faces[1]); jb.setPressedIcon(faces[2]); jb.setDisabledIcon(faces[4]); jb.setToolTipText("Yow!"); add(jb); jb2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ if(jb.isEnabled()) { jb.setEnabled(false); jb2.setText("Enable"); } else { jb.setEnabled(true); jb2.setText("Disable"); } } }); add(jb2); }

  11. JLabel public class LabelPanel extends JPanel { public LabelPanel() { JLabel plainLabel = new JLabel("Plain Small Label"); add(plainLabel); JLabel fancyLabel = new JLabel("Fancy Big Label"); Font fancyFont =new Font("Serif", Font.BOLD | Font.ITALIC, 32); fancyLabel.setFont(fancyFont); Icon tigerIcon = new ImageIcon("SmallTiger.gif"); fancyLabel.setIcon(tigerIcon); fancyLabel.setHorizontalAlignment(JLabel.RIGHT); add(fancyLabel); } } String labelText = "<html><FONT COLOR=RED>Red</FONT> and " + "<FONT COLOR=BLUE>Blue</FONT> Text</html>"; JLabel coloredLabel = new JLabel(labelText, Label.CENTER);

  12. Border public class Borders extends JPanel { static JPanel showBorder(Border b) { JPanel jp = new JPanel(); jp.setLayout(new BorderLayout()); String nm = b.getClass().toString(); nm = nm.substring(nm.lastIndexOf('.') + 1); jp.add(new JLabel(nm, JLabel.CENTER), BorderLayout.CENTER); jp.setBorder(b); return jp; } public Borders() { setLayout(new GridLayout(2,4)); add(showBorder(new TitledBorder("Title"))); add(showBorder(new EtchedBorder())); add(showBorder(new LineBorder(Color.blue))); add(showBorder( new MatteBorder(5,5,30,30,Color.green))); add(showBorder( new BevelBorder(BevelBorder.RAISED))); add(showBorder( new SoftBevelBorder(BevelBorder.LOWERED))); add(showBorder(new CompoundBorder( new EtchedBorder(), new LineBorder(Color.red)))); } }

  13. JList import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class ListCombo extends JPanel { JComboBox combo; JList list; public ListCombo() { setLayout(new GridLayout(2,1)); list = new JList(ButtonGroups.ids); list.addListSelectionListener(new ListSelectionListener() { public void valueChanged(ListSelectionEvent e) { int[] a = list.getSelectedIndices(); for(int i=0; i < list.getSelectedIndices().length; i++) System.out.println(list.getSelectedIndices()[i]); }}); add(new JScrollPane(list));

  14. JList public void valueChanged(ListSelectionEvent e) { if (e.getValueIsAdjusting() == false) { if (list.getSelectedIndex() == -1) { … } else { … } } } list = new JList(data); // data::Object[] list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); list.setLayoutOrientation(JList.HORIZONTAL_WRAP); ... JScrollPane listScroller = new JScrollPane(list); listScroller.setPreferredSize(new Dimension(250, 80));

  15. JCombo combo = new JComboBox(); for(int i = 0; i < 100; i++) combo.addItem(Integer.toString(i)); add(combo); combo.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { System.out.println(combo.getSelectedItem()); }}); }

  16. Slider static final int FPS_MIN = 0; static final int FPS_MAX = 30; static final int FPS_INIT = 15; //init JSlider framesPerSecond = new JSlider(JSlider.HORIZONTAL, FPS_MIN, FPS_MAX, FPS_INIT); framesPerSecond.addChangeListener(this); framesPerSecond.setMajorTickSpacing(10); framesPerSecond.setMinorTickSpacing(1); framesPerSecond.setPaintTicks(true); framesPerSecond.setPaintLabels(true); public void stateChanged(ChangeEvent e) { JSlider source = (JSlider)e.getSource(); if (!source.getValueIsAdjusting()) { int fps = (int)source.getValue(); if (fps == 0) { if (!frozen) stopAnimation(); } else { delay = 1000 / fps; timer.setDelay(delay); timer.setInitialDelay(delay * 10); if (frozen) startAnimation(); } } }

  17. ProgressBar public void actionPerformed(ActionEvent evt) { progressBar.setValue(task.getCurrent()); String s = task.getMessage(); if (s != null) { taskOutput.append(s + newline); taskOutput.setCaretPosition( taskOutput.getDocument().getLength()); } if (task.isDone()) { Toolkit.getDefaultToolkit().beep(); timer.stop(); startButton.setEnabled(true); setCursor(null); //turn off the wait cursor progressBar.setValue(progressBar.getMinimum()); } } JProgressBar progressBar; ... progressBar = new JProgressBar(0, task.getLengthOfTask()); progressBar.setValue(0); progressBar.setStringPainted(true);

  18. Slider & Progress public class Progress extends JPanel { JProgressBar pb = new JProgressBar(); JSlider sb = new JSlider(JSlider.HORIZONTAL, 0, 100, 60); public Progress() { setLayout(new GridLayout(2,1)); add(pb); sb.setValue(0); sb.setPaintTicks(true); sb.setMajorTickSpacing(20); sb.setMinorTickSpacing(5); sb.setBorder(new TitledBorder("Slide Me")); pb.setModel(sb.getModel()); // Share model add(sb); } }

  19. JSplit Pane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, listScrollPane, pictureScrollPane); splitPane.setOneTouchExpandable(true); splitPane.setDividerLocation(150); Dimension minimumSize = new Dimension(100, 50); listScrollPane.setMinimumSize(minimumSize); pictureScrollPane.setMinimumSize(minimumSize);

  20. JScrollBar public class ScrollbarPanel extends JPanel { public ScrollbarPanel() { setLayout(new BorderLayout()); JScrollBar scrollBar1 = new JScrollBar (JScrollBar.VERTICAL, 0, 5, 0, 100); add(scrollBar1, BorderLayout.EAST); JScrollBar scrollBar2 = new JScrollBar (JScrollBar.HORIZONTAL, 0, 5, 0, 100); add(scrollBar2, BorderLayout.SOUTH); } }

  21. JText copy() cut() paste() getSelectedText() setSelectionStart() setSelectionEnd() selectAll() replaceSelection() getText() setText() setEditable() setCaretPosition()

  22. JTextField, JTextArea, JTextPane JTextField tf = new JTextField(); tf.setText("TextField"); add(tf); JTextArea ta = new JTextArea(); ta.setText("JTextArea\n Allows Multiple Lines"); add(new JScrollPane(ta)); JTextPane tp = new JTextPane(); MutableAttributeSet attr = new SimpleAttributeSet(); StyleConstants.setFontFamily(attr, "Serif"); StyleConstants.setFontSize(attr, 18); StyleConstants.setBold(attr, true); tp.setCharacterAttributes(attr, false); add(new JScrollPane(tp)); PasswordPanel() { JPasswordField pass1 = new JPasswordField(20); JPasswordField pass2 = new JPasswordField(20); pass2.setEchoChar ('?'); add(pass1); add(pass2); }

  23. JEditorPane final JEditorPane jt = new JEditorPane(); jt.setEditable(false); jt.setPage ("file:///C:/borovan/JAVA/index.html"); jt.addHyperlinkListener(new HyperlinkListener () { public void hyperlinkUpdate(final HyperlinkEvent e) { if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) { SwingUtilities.invokeLater(new Runnable() { public void run() { Document doc = jt.getDocument(); try { URL url = e.getURL(); jt.setPage(url); input.setText (url.toString()); } catch (IOException io) { JOptionPane.showMessageDialog ( Browser.this, "Can't follow link", "Invalid Input", JOptionPane.ERROR_MESSAGE); jt.setDocument (doc); } } });

  24. Dialogs //default title and icon JOptionPane.showMessageDialog(frame, “info dialog"); //custom title, warning icon JOptionPane.showMessageDialog(frame, “warning dialog", "warning", JOptionPane.WARNING_MESSAGE); //custom title, error icon JOptionPane.showMessageDialog(frame, “error dialog”, "error", JOptionPane.ERROR_MESSAGE); //custom title, custom icon JOptionPane.showMessageDialog(frame, “icon", "custom", JOptionPane.INFORMATION_MESSAGE, icon); JOptionPane optionPane = new JOptionPane( "The only way to close this dialog is by\n" + "pressing one of the following buttons.\n" + "Do you understand?", JOptionPane.QUESTION_MESSAGE, JOptionPane.YES_NO_OPTION);

  25. InputDialog Object[] possibilities = {"ham", "spam", "yam"}; String s = (String)JOptionPane.showInputDialog( frame, "Complete the sentence:\n" + "\"Green eggs and...\"", "Customized Dialog", JOptionPane.PLAIN_MESSAGE, icon, possibilities, "ham"); //If a string was returned, say so. if ((s != null) && (s.length() > 0)) { setLabel("Green eggs and... " + s + "!"); return; }

  26. JMenuBar public Object[] menuBar = { fileMenu, editMenu, faceMenu, optionMenu, helpMenu, }; static public JMenuBar createMenuBar(Object[] menuBarData) { JMenuBar menuBar = new JMenuBar(); for(int i = 0; i < menuBarData.length; i++) menuBar.add(createMenu((Object[][])menuBarData[i])); return menuBar; }

  27. JMenu public Object[][] helpMenu = { // Menu name: { "Help", new Character('H') }, // Name type accel listener enabled { "Index", mi, new Character('I'), a1, bT }, { "Using help", mi,new Character('U'),a1,bT}, { null }, // Separator { "About", mi, new Character('t'), a1, bT }, }; static ButtonGroup bgroup; static public JMenu createMenu(Object[][] menuData) { JMenu menu = new JMenu(); menu.setText((String)menuData[0][0]); menu.setMnemonic(((Character)menuData[0][1]).charValue()); // Create redundantly, in case there are any radio buttons: bgroup = new ButtonGroup(); for(int i = 1; i < menuData.length; i++) { if(menuData[i][0] == null) menu.add(new JSeparator()); else menu.add(createMenuItem(menuData[i])); } return menu; }

  28. JMenuItem static public JMenuItem createMenuItem(Object[] data) { JMenuItem m = null; MType type = (MType)data[1]; if(type == mi) m = new JMenuItem(); else if(type == cb) m = new JCheckBoxMenuItem(); else if(type == rb) { m = new JRadioButtonMenuItem(); bgroup.add(m); } m.setText((String)data[0]); m.setMnemonic( ((Character)data[2]).charValue()); m.addActionListener((ActionListener)data[3]); m.setEnabled(((Boolean)data[4]).booleanValue()); if(data.length == 6) m.setIcon((Icon)data[5]); return m; } public Object[][] faceMenu = { { "Faces", new Character('a') }, { "Face 0", rb, new Character('0'), a2, bT, Faces.faces[0] },

  29. Action&ItemListener menuItem = new JMenuItem( "Both text and icon", new ImageIcon("images/middle.gif")); menuItem.setMnemonic(KeyEvent.VK_B); menu.add(menuItem); public class MenuDemo ... implements ActionListener, ItemListener { ... public MenuDemo() { menuItem.addActionListener(this); //...for each JMenuItem instance: ... rbMenuItem.addActionListener(this); //for each JRadioButtonMenuItem: ... cbMenuItem.addItemListener(this); //for each JCheckBoxMenuItem: ... } public void actionPerformed(ActionEvent e) { } public void itemStateChanged(ItemEvent e) { }

  30. Popup import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Popup extends JPanel { JPopupMenu popup = new JPopupMenu(); JTextField t = new JTextField(10); public Popup() { add(t); ActionListener al = new ActionListener() { public void actionPerformed(ActionEvent e){ t.setText( ((JMenuItem)e.getSource()).getText()); } }; JMenuItem m = new JMenuItem(“CutMe"); m.addActionListener(al); popup.add(m); m = new JMenuItem(“CopyMe"); m.addActionListener(al); popup.add(m); m = new JMenuItem(“PasteMe"); m.addActionListener(al); popup.add(m); popup.addSeparator(); m = new JMenuItem(“Nothing"); m.addActionListener(al); popup.add(m); PopupListener pl = new PopupListener(); addMouseListener(pl); t.addMouseListener(pl); } class PopupListener extends MouseAdapter { public void mousePressed(MouseEvent e) { maybeShowPopup(e); } public void mouseReleased(MouseEvent e) { maybeShowPopup(e); } private void maybeShowPopup(MouseEvent e) { if(e.isPopupTrigger()) { popup.show( e.getComponent(), e.getX(), e.getY()); } } } }

  31. static int i = 0; DefaultMutableTreeNode root, child, chosen; JTree tree; DefaultTreeModel model; public Trees() { setLayout(new BorderLayout()); root = new DefaultMutableTreeNode("root"); tree = new JTree(root); add(new JScrollPane(tree), BorderLayout.CENTER); model =(DefaultTreeModel)tree.getModel(); JButton test = new JButton("Press me"); test.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ if(i < data.length) { child = new Branch(data[i++]).node(); chosen = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent(); if(chosen == null) chosen = root; model.insertNodeInto(child, chosen, 0); } } }); JPanel p = new JPanel(); p.add(test); add(p, BorderLayout.SOUTH); } Trees class Branch { DefaultMutableTreeNode r; public Branch(String[] data) { r = new DefaultMutableTreeNode(data[0]); for(int i = 1; i < data.length; i++) r.add(new DefaultMutableTreeNode(data[i])); } public DefaultMutableTreeNode node() { return r; } } public class Trees extends JPanel { String[][] data = { { "Colors", "Red", "Blue", "Green" }, { "Flavors", "Tart", "Sweet", "Bland" }, { "Length", "Short", "Medium", "Long" }, { "Volume", "High", "Medium", "Low" }, { "Temperature", "High", "Medium", "Low" }, { "Intensity", "High", "Medium", "Low" }, };

  32. Tabbed public class Tabbed extends JPanel { static Object[][] q = { { "Felix", Borders.class }, { "The Professor", Buttons.class }, { "Rock Bottom", ButtonGroups.class }, { "Theodore", Faces.class }, { "Simon", Menus.class }, { "Alvin", Popup.class }, { "Tom", ListCombo.class }, { "Jerry", Progress.class }, { "Bugs", Trees.class }, { "Daffy", Table.class }, }; static JPanel makePanel(Class c) { String title = c.getName(); title = title.substring(title.lastIndexOf('.') + 1); JPanel sp = null; try { sp = (JPanel)c.newInstance(); } catch(Exception e) { System.out.println(e); } sp.setBorder(new TitledBorder(title)); return sp; } public Tabbed() { setLayout(new BorderLayout()); JTabbedPane tabbed = new JTabbedPane(); for(int i = 0; i < q.length; i++) tabbed.addTab((String)q[i][0], makePanel((Class)q[i][1])); add(tabbed, BorderLayout.CENTER); tabbed.setSelectedIndex(q.length/2); } }

  33. JTable String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian"}; Object[][] data = { {"Mary", "Campione", "Snowboarding", new Integer(5), new Boolean(false)}, {"Alison", "Huml", "Rowing", new Integer(3), new Boolean(true)}, {"Kathy", "Walrath", "Knitting", new Integer(2), new Boolean(false)}, {"Sharon", "Zakhour", "Speed reading", new Integer(20), new Boolean(true)}, {"Philip", "Milne", "Pool", new Integer(10), new Boolean(false)} }; JTable table = new JTable(data, columnNames);

  34. Table class DataModel extends AbstractTableModel { Object[][] data = { {"one", "two", "three", "four"}, {"five", "six", "seven", "eight"}, {"nine", "ten", "eleven", "twelve"}, }; class TML implements TableModelListener { public void tableChanged(TableModelEvent e) { … } } DataModel() { addTableModelListener(new TML()); } public int getColumnCount() { return data[0].length; } public int getRowCount() { return data.length; } public Object getValueAt(int row, int col) { return data[row][col]; } public void setValueAt(Object val, int row, int col) { data[row][col] = val; // Indicate the change has happened: fireTableDataChanged(); } public boolean isCellEditable(int row, int col) { return true; } }; import java.awt.*; import javax.swing.*; public class Table extends JPanel { public Table() { setLayout(new BorderLayout()); JTable table = new JTable(new DataModel()); JScrollPane scrollpane = JTable.createScrollPaneForTable(table); add(scrollpane, BorderLayout.CENTER); } public static void main(String args[]) { Show.inFrame(new Table(),200,200); } }

More Related