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嗨我正在使用一個表，其中兩列即儀器和方法。點擊一個按鈕，我會在每個單元格中添加一行組合框作爲編輯器。另外，這些組合框會有actionlistener。就像我在選擇儀器時一樣，應該更改方法組合框列表。我只使用兩個組合框，每當我添加一行時，我都會實例化它。我的問題是每當我添加一個新行時，現有的行組合將獲得最新值的重載。這意味着，組合框是獨一無二的，即使我以不同的方式進行實例化。動態創建組合框的方法是什麼，它應該有它自己的值。張貼我的代碼以供參考。動態組合框問題
addItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
comboInstrument = new CeNComboBox();
comboMethod = new CeNComboBox();
TableColumn instrumentColumn = table.getColumn("Instrument Used");
TableColumn methodColumn = table.getColumn("Method Title");
comboInstrument.removeAllItems();
listInstruments = analyticalUtil.getInstruments(listAnalysisSummaryPrefs);
iterateInstruments = listInstruments.iterator();
while(iterateInstruments.hasNext()){
comboInstrument.addItem(iterateInstruments.next());
}
dtm.addRow(new Object[]{" "," "});
comboInstrument.setEditable(true);
instrumentColumn.setCellEditor(new MyComboBoxEditor(comboInstrument));
instrumentColumn.setCellRenderer(new MyComboBoxRenderer());
comboMethod.setEditable(true);
methodColumn.setCellEditor(new MyComboBoxEditor(comboMethod));
methodColumn.setCellRenderer(new MyComboBoxRenderer());
comboInstrument.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent argEvent){
comboInstrumentActionPerformed();
}
});
comboMethod.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent argEvent){
comboMethodActionPerformed();
}
});
}
});
MyComboBoxEditor.java
public class MyComboBoxEditor extends DefaultCellEditor {
public MyComboBoxEditor(JComboBox combobox) {
super(combobox);
}
}
我很新的擺動。請幫助我。
添加一些帶硬編碼值的示例代碼。如果你運行這個，你會明白我的問題。以這種方式進行測試。 1.從第一列第一行中選擇一個值，然後從另一列中選擇值。 2.在第二行做相同的操作，現在檢查第一行的第二列。所有的值將根據第二行的選擇重新加載。 這是我面臨的問題。下面的代碼複製並編輯從以下鏈接
private static final long serialVersionUID = 1L;
private JComboBox mainComboBox;
private JComboBox subComboBox;
private Hashtable<Object, Object> subItems = new Hashtable<Object, Object>();
public Testing() {
String[] items = {"","Select Item", "Color", "Shape", "Fruit", "Size"};
mainComboBox = new JComboBox(items);
mainComboBox.addActionListener(this);
mainComboBox.addItemListener(this);
mainComboBox.setEditable(true);
//prevent action events from being fired when the up/down arrow keys are used
//mainComboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
// getContentPane().add(mainComboBox, BorderLayout.WEST);
subComboBox = new JComboBox();// Create sub combo box with multiple models
subComboBox.setPrototypeDisplayValue("XXXXXXXXXX"); // JDK1.4
subComboBox.addItemListener(this);
// getContentPane().add(subComboBox, BorderLayout.CENTER);
String[] subItems1 = {"Select Color", "Red", "Blue", "Green"};
subItems.put(items[1], subItems1);
String[] subItems2 = {"Select Shape", "Circle", "Square", "Triangle"};
subItems.put(items[2], subItems2);
String[] subItems3 = {"Select Fruit", "Apple", "Orange", "Banana"};
subItems.put(items[3], subItems3);
String[] subItems4 = {"Select Size", "Big", "Middle", "Small"};
subItems.put(items[4], subItems4);
DefaultTableModel model = new DefaultTableModel(new String[]{"Instrument Used","Method Title"},0);
JTable table = new JTable(model);
table.getColumn("Instrument Used").setCellEditor(new MyComboBoxEditor(mainComboBox));
table.getColumn("Instrument Used").setCellRenderer(new MyComboBoxRenderer());
table.getColumn("Method Title").setCellEditor(new MyComboBoxEditor(subComboBox));
table.getColumn("Method Title").setCellRenderer(new MyComboBoxRenderer());
model.addRow(new String[]{""});
model.addRow(new String[]{""});
getContentPane().add(table, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e) {
String item = (String) mainComboBox.getSelectedItem();
JOptionPane.showMessageDialog(null, "Action Performed "+item);
Object o = subItems.get(item);
if (o == null) {
subComboBox.setModel(new DefaultComboBoxModel());
} else {
subComboBox.setModel(new DefaultComboBoxModel((String[]) o));
}
}
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
if (e.getSource() == mainComboBox) {
if (mainComboBox.getSelectedIndex() != 0) {
FirstDialog firstDialog = new FirstDialog(Testing.this,
mainComboBox.getSelectedItem().toString(), "Please wait, Searching for ..... ");
}
}
}
}
private class FirstDialog extends JDialog {
private static final long serialVersionUID = 1L;
FirstDialog(final Frame parent, String winTitle, String msgString) {
super(parent, winTitle);
//setModalityType(Dialog.ModalityType.APPLICATION_MODAL);
JLabel myLabel = new JLabel(msgString);
JButton bNext = new JButton("Stop Processes");
add(myLabel, BorderLayout.CENTER);
add(bNext, BorderLayout.SOUTH);
bNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
setVisible(false);
}
});
javax.swing.Timer t = new javax.swing.Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
setVisible(false);
}
});
t.setRepeats(false);
t.start();
setLocationRelativeTo(parent);
setSize(new Dimension(400, 100));
setVisible(true);
}
}
public static void main(String[] args) {
JFrame frame = new Testing();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
您認爲哪些事件？已在'AbstractCellEditor'中實現的EditingStopped和editingCancelled – Nestor 2012-08-09 07:00:08
我看着它。所有我發現當comboBox改變其選擇的項目時，會觸發'stopCellEditing'。我同意，如果我將它添加到代碼中會更好。 – Nestor 2012-08-09 07:27:44
謝謝..它工作正常。編輯器組合框的項目狀態更改事件沒有被觸發 – Nila 2012-08-09 09:48:40