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我有JXTable的錶行選擇問題。JXTable + GlazedLists +在拖動選擇期間更新=問題
如果我運行以下程序，我會看到兩個幀正在查看相同的EventList<Item>。一個有JTable，另一個有JXTable。
每1000毫秒我更新名稱以foo開頭的所有項目（這發生在tweakList()）。此更新似乎會干擾JXTable中的鼠標選擇，但不會影響JTable：如果在JXTable中單擊並向下拖動以選擇多行，則選擇定位點會在更新發生時消失。 （點擊並向上拖動工作正常）
它爲什麼這樣做，我該如何解決這個問題？
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashSet;
import java.util.Set;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.Timer;
import org.jdesktop.swingx.JXTable;
import ca.odell.glazedlists.BasicEventList;
import ca.odell.glazedlists.EventList;
import ca.odell.glazedlists.SortedList;
import ca.odell.glazedlists.gui.TableFormat;
import ca.odell.glazedlists.swing.EventTableModel;
public class TableSelectionExample {
static public enum ItemKey {
NAME("name") {
@Override public String getStringFromItem(Item item) {
return item.getName();
}
},
NUMBER("#") {
@Override public String getStringFromItem(Item item) {
return Integer.toString(item.getNumber());
}
},
PARENT("parent") {
@Override public String getStringFromItem(Item item) {
Item p = item.getParent();
return (p == null) ? null : p.getName();
}
};
final private String name;
ItemKey(String name) { this.name = name; }
public String getName() { return this.name; }
abstract public String getStringFromItem(Item item);
static private ItemKey[] columns = { NAME, NUMBER, PARENT };
static public ItemKey[] getColumns() { return columns; }
}
static public class ItemTableFormat implements TableFormat<Item> {
@Override public int getColumnCount() {
return ItemKey.getColumns().length;
}
@Override public String getColumnName(int col) {
return ItemKey.getColumns()[col].getName(); }
@Override public Object getColumnValue(Item item, int col) {
return ItemKey.getColumns()[col].getStringFromItem(item);
}
}
static class Item {
final private String name;
private int number;
final private Item parent;
private Item(String name, int number, Item parent) {
this.name=name; this.number=number; this.parent=parent;
}
static public Item create(String name, int number, Item parent) {
return new Item(name, number, parent);
}
public String getName() { return this.name; }
public int getNumber() { return this.number; }
public void setNumber(int number) { this.number = number; }
public Item getParent() { return this.parent; }
}
static public void main(String[] args)
{
final EventList<Item> items = new BasicEventList<Item>();
Item x1,x2,x3;
x1 = Item.create("foo", 1, null);
x2 = Item.create("bar", 2, x1);
x3 = Item.create("baz", 3, x1);
items.add(x1);
items.add(x2);
items.add(x3);
for (int i = 0; i < 20; ++i)
{
items.add(Item.create(String.format("bar%02d",i), 100+i, x2));
items.add(Item.create(String.format("baz%02d",i), 200+i, x3));
if (isprime(i))
items.add(Item.create(
String.format("foo%02d", i), 300+i, x1));
}
EventList<Item> sortedItems = new SortedList<Item>(items, null);
doit(sortedItems, new JTable(), "JTable selection example");
doit(sortedItems, new JXTable(), "JXTable selection example");
Timer timer = new Timer(1000, new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
tweakList(items);
}
});
timer.start();
}
private static void doit(EventList<Item> displayItems,
JTable table, String title) {
TableFormat<Item> tf = new ItemTableFormat();
EventTableModel<Item> etm =
new EventTableModel<Item>(displayItems, tf);
table.setModel(etm);
if (table instanceof JXTable)
{
((JXTable)table).setColumnControlVisible(true);
}
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.add(new JScrollPane(table), BorderLayout.CENTER);
JFrame frame = new JFrame(title);
frame.getContentPane().add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.pack();
}
private static boolean isprime(int i) {
// works for i < 400
if (i < 2)
return false;
else if (i > 2 && (i % 2) == 0)
return false;
else if (i > 3 && (i % 3) == 0)
return false;
else if (i > 5 && (i % 5) == 0)
return false;
else if (i > 7 && (i % 7) == 0)
return false;
else if (i > 11 && (i % 11) == 0)
return false;
else if (i > 13 && (i % 13) == 0)
return false;
else if (i > 17 && (i % 17) == 0)
return false;
else if (i > 19 && (i % 19) == 0)
return false;
else
return true;
}
protected static void tweakList(EventList<Item> items) {
int L = items.size();
Set<Integer> modifiedItems = new HashSet<Integer>();
for (int i = 0; i < L; ++i)
{
Item item = items.get(i);
if (item.getName().startsWith("foo"))
{
item.setNumber(item.getNumber()+1000);
modifiedItems.add(i);
}
}
refreshModifiedItems(items, modifiedItems);
}
private static void refreshModifiedItems(EventList<Item> items,
Set<Integer> modifiedItems) {
for (int i : modifiedItems)
{
items.set(i, items.get(i));
}
}
}