|
| 1 | +import java.awt.BorderLayout; |
| 2 | +import java.awt.Component; |
| 3 | +import java.awt.GridLayout; |
| 4 | +import java.awt.Rectangle; |
| 5 | +import java.awt.event.ActionEvent; |
| 6 | +import java.awt.event.ActionListener; |
| 7 | +import java.awt.event.MouseAdapter; |
| 8 | +import java.awt.event.MouseEvent; |
| 9 | +import java.awt.event.WindowAdapter; |
| 10 | +import java.awt.event.WindowEvent; |
| 11 | +import java.io.Serializable; |
| 12 | + |
| 13 | +import javax.swing.JButton; |
| 14 | +import javax.swing.JCheckBox; |
| 15 | +import javax.swing.JFrame; |
| 16 | +import javax.swing.JList; |
| 17 | +import javax.swing.JPanel; |
| 18 | +import javax.swing.JScrollPane; |
| 19 | +import javax.swing.JTextArea; |
| 20 | +import javax.swing.ListCellRenderer; |
| 21 | +import javax.swing.ListModel; |
| 22 | +import javax.swing.ListSelectionModel; |
| 23 | +import javax.swing.UIManager; |
| 24 | +import javax.swing.border.EmptyBorder; |
| 25 | + |
| 26 | +public class JFrameTest extends JFrame { |
| 27 | + |
| 28 | + public JFrameTest() { |
| 29 | + super("CheckList Example"); |
| 30 | + String[] strs = { "swing", "home", "basic", "metal", "JList" }; |
| 31 | + |
| 32 | + final JList list = new JList(createData(strs)); |
| 33 | + |
| 34 | + list.setCellRenderer(new CheckListRenderer()); |
| 35 | + list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); |
| 36 | + list.setBorder(new EmptyBorder(0, 4, 0, 0)); |
| 37 | + list.addMouseListener(new MouseAdapter() { |
| 38 | + public void mouseClicked(MouseEvent e) { |
| 39 | + int index = list.locationToIndex(e.getPoint()); |
| 40 | + CheckableItem item = (CheckableItem) list.getModel() |
| 41 | + .getElementAt(index); |
| 42 | + item.setSelected(!item.isSelected()); |
| 43 | + Rectangle rect = list.getCellBounds(index, index); |
| 44 | + list.repaint(rect); |
| 45 | + } |
| 46 | + }); |
| 47 | + JScrollPane sp = new JScrollPane(list); |
| 48 | + |
| 49 | + final JTextArea textArea = new JTextArea(3, 10); |
| 50 | + JScrollPane textPanel = new JScrollPane(textArea); |
| 51 | + JButton printButton = new JButton("print"); |
| 52 | + printButton.addActionListener(new ActionListener() { |
| 53 | + public void actionPerformed(ActionEvent e) { |
| 54 | + ListModel model = list.getModel(); |
| 55 | + int n = model.getSize(); |
| 56 | + for (int i = 0; i < n; i++) { |
| 57 | + CheckableItem item = (CheckableItem) model.getElementAt(i); |
| 58 | + if (item.isSelected()) { |
| 59 | + textArea.append(item.toString()); |
| 60 | + textArea.append(System.getProperty("line.separator")); |
| 61 | + } |
| 62 | + } |
| 63 | + } |
| 64 | + }); |
| 65 | + JButton clearButton = new JButton("clear"); |
| 66 | + clearButton.addActionListener(new ActionListener() { |
| 67 | + public void actionPerformed(ActionEvent e) { |
| 68 | + textArea.setText(""); |
| 69 | + } |
| 70 | + }); |
| 71 | + JPanel panel = new JPanel(new GridLayout(2, 1)); |
| 72 | + panel.add(printButton); |
| 73 | + panel.add(clearButton); |
| 74 | + |
| 75 | + getContentPane().add(sp, BorderLayout.CENTER); |
| 76 | + getContentPane().add(panel, BorderLayout.EAST); |
| 77 | + getContentPane().add(textPanel, BorderLayout.SOUTH); |
| 78 | + } |
| 79 | + |
| 80 | + private CheckableItem[] createData(String[] strs) { |
| 81 | + int n = strs.length; |
| 82 | + CheckableItem[] items = new CheckableItem[n]; |
| 83 | + for (int i = 0; i < n; i++) { |
| 84 | + items[i] = new CheckableItem(strs[i]); |
| 85 | + } |
| 86 | + return items; |
| 87 | + } |
| 88 | + |
| 89 | + class CheckableItem implements Serializable { |
| 90 | + private String str; |
| 91 | + |
| 92 | + private boolean isSelected; |
| 93 | + |
| 94 | + public CheckableItem(String str) { |
| 95 | + this.str = str; |
| 96 | + isSelected = false; |
| 97 | + } |
| 98 | + |
| 99 | + public void setSelected(boolean b) { |
| 100 | + isSelected = b; |
| 101 | + } |
| 102 | + |
| 103 | + public boolean isSelected() { |
| 104 | + return isSelected; |
| 105 | + } |
| 106 | + |
| 107 | + public String toString() { |
| 108 | + return str; |
| 109 | + } |
| 110 | + } |
| 111 | + |
| 112 | + class CheckListRenderer extends JCheckBox implements ListCellRenderer { |
| 113 | + |
| 114 | + public CheckListRenderer() { |
| 115 | + setBackground(UIManager.getColor("List.textBackground")); |
| 116 | + setForeground(UIManager.getColor("List.textForeground")); |
| 117 | + } |
| 118 | + |
| 119 | + public Component getListCellRendererComponent(JList list, Object value, |
| 120 | + int index, boolean isSelected, boolean hasFocus) { |
| 121 | + setEnabled(list.isEnabled()); |
| 122 | + setSelected(((CheckableItem) value).isSelected()); |
| 123 | + setFont(list.getFont()); |
| 124 | + setText(value.toString()); |
| 125 | + return this; |
| 126 | + } |
| 127 | + } |
| 128 | + |
| 129 | + public static void main(String args[]) { |
| 130 | + try { |
| 131 | + UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); |
| 132 | + } catch (Exception evt) { |
| 133 | + } |
| 134 | + |
| 135 | + JFrameTest frame = new JFrameTest(); |
| 136 | + frame.addWindowListener(new WindowAdapter() { |
| 137 | + public void windowClosing(WindowEvent e) { |
| 138 | + System.exit(0); |
| 139 | + } |
| 140 | + }); |
| 141 | + frame.setSize(300, 200); |
| 142 | + frame.setVisible(true); |
| 143 | + } |
| 144 | +} |
0 commit comments