我想在 a 中使用 aJComboBox作为单元格编辑器JXTreeTable。它适用于标准DefaultCellEditor（即点击计数开始等于 2）。
现在我希望该列只需单击即可编辑。所以我cellEditor.setClickCountToStart(1);在我的代码中添加了一条语句。
这是我的SSCCE：
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import org.jdesktop.swingx.JXTreeTable;
import org.jdesktop.swingx.treetable.DefaultMutableTreeTableNode;
import org.jdesktop.swingx.treetable.DefaultTreeTableModel;
public class TestCellEditorForJXTreeTable {
/** The JXTreeTable */
JXTreeTable treeTable;
/** The model */
DefaultTreeTableModel treeTableModel;
/** Constructor */
public TestCellEditorForJXTreeTable() {
treeTable = new JXTreeTable();
treeTableModel = new DefaultTreeTableModel() {
@Override
public String getColumnName(int column) {
switch (column) {
case 0:
return "A";
case 1:
return "B";
}
return null;
}
@Override
public Object getValueAt(Object node, int column) {
switch (column) {
case 0:
return ((DefaultMutableTreeTableNode) node).getUserObject();
case 1:
return "Value in B";
}
return null;
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public boolean isCellEditable(Object node, int column) {
return column == 1;
}
};
treeTable.setTreeTableModel(treeTableModel);
}
public static void main(String[] args) {
TestCellEditorForJXTreeTable test = new TestCellEditorForJXTreeTable();
// Root node
DefaultMutableTreeTableNode root = new DefaultMutableTreeTableNode("root");
test.treeTableModel.setRoot(root);
// New nodes/rows
DefaultMutableTreeTableNode node = new DefaultMutableTreeTableNode("child_node");
test.treeTableModel.insertNodeInto(node, root, 0);
DefaultMutableTreeTableNode node2 = new DefaultMutableTreeTableNode("child_node2");
test.treeTableModel.insertNodeInto(node2, root, 1);
// Showing the frame
showTable(test.treeTable);
// Setting the cell editor
DefaultCellEditor cellEditor = new DefaultCellEditor(new JComboBox(new String[]{"1", "2", "3"}));
cellEditor.setClickCountToStart(1);
test.treeTable.getColumn(1).setCellEditor(cellEditor);
}
/** Shows a JXTreeTable in a frame */
private static void showTable(JXTreeTable table) {
JFrame frame = new JFrame("Testing cell editor for JXTreeTable");
frame.setPreferredSize(new Dimension(640, 480));
frame.setLayout(new BorderLayout());
frame.add(table, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
但现在它看起来很丑：
当我点击一个可编辑的单元格时，它会打开JComboBox弹出菜单（太棒了！这是我所期待的！），但是这个弹出菜单会立即关闭（Erf！）。它闪烁。我必须再次单击所选单元格才能最终打开它。
每次我在可编辑列中选择另一个单元格时，问题都会重复。
第一次单击后如何才能真正JComboBox打开弹出菜单？
谢谢。
编辑 2014-01-24
这是相同的示例，但使用JTable. 弹出JComboBox菜单不闪烁。
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class TestCellEditorForJTable {
/** The JTable */
JTable table;
/** The model */
DefaultTableModel tableModel;
/** Constructor */
public TestCellEditorForJTable() {
table = new JTable();
tableModel = new DefaultTableModel(new String[] {"A", "B"}, 0) {
@Override
public boolean isCellEditable(int row, int column) {
return column == 1;
}
};
table.setModel(tableModel);
}
public static void main(String[] args) {
TestCellEditorForJTable test = new TestCellEditorForJTable();
// New rows
test.tableModel.insertRow(0, new String[] {"Value1 in A", "Value1 in B"});
test.tableModel.insertRow(1, new String[] {"Value2 in A", "Value2 in B"});
// Showing the frame
showTable(test.table);
// Setting the cell editor
DefaultCellEditor cellEditor = new DefaultCellEditor(new JComboBox(new String[]{"1", "2", "3"}));
cellEditor.setClickCountToStart(1);
test.table.getColumnModel().getColumn(1).setCellEditor(cellEditor);
}
/** Shows a table in a frame */
private static void showTable(JTable table) {
JFrame frame = new JFrame("Testing cell editor for JTable");
frame.setPreferredSize(new Dimension(640, 480));
frame.setLayout(new BorderLayout());
frame.add(table, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
我忘了提到我使用的是 Java 1.6。
编辑 2014-01-24 (2)
使用kleopatra's answer的ContainerListener和，并运行相同的执行流程，我通过 SSCCE 得到以下输出：FocusListenerJXTreeTable
// first click
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$2 componentRemoved
INFO: java.awt.event.ContainerEvent[COMPONENT_REMOVED...JXTreeTable...
24.01.2014 13:10:59 my.pkg.TestCellEditorForJXTreeTable$3 focusLost
INFO: java.awt.FocusEvent[FOCUS_LOST...JXTreeTable...
// second click
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$2 componentAdded
INFO: java.awt.event.ContainerEvent[COMPONENT_ADDED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$3 focusGained
INFO: java.awt.FocusEvent[FOCUS_GAINED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$2 componentRemoved
INFO: java.awt.event.ContainerEvent[COMPONENT_REMOVED...JXTreeTable...
24.01.2014 13:11:02 my.pkg.TestCellEditorForJXTreeTable$3 focusLost
INFO: java.awt.FocusEvent[FOCUS_LOST...JXTreeTable...