我是JTables。我从第一个表中拖出一行并将其放到第二个表中。 到目前为止，DnD操作正常，但如何轻松刷新第二个表 放弃操作？我已经实现了一个TableModelListener，但它只适用于我 双击表格的一行。
我的问题：我需要哪个事件监听器来解决我的问题？任何解决方案或示例？
btw：DnD操作正在使用tranferHandler
执行答案 0 :(得分：0)
好的，这里有一些代码：
谢谢和问候！
TableExample：
package GUI_Examples;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
public class TableExample implements TableModelListener{
String [] title = new String [] {"Title A", "Title B"};
String [] title2 = new String [] {"Title C", "Title D"};
Object [][] data = new String [][] {{"aaaaaaaaaaaa aaaaaa aaaaaaa", "bbbbbbbb bbbb bbbbbb bbbbbb"},
{"cccccccccc cccccccc ccccccc", "ddddddd ddd dddddddd dddddd"},
{"eeeeeeeeee eeeeeeee eeeeeee", "fffffff ffff ffffff fffffff"}};
Object [][] data2 = new String [][] {{"",""}};
private JTable table;
private JTable table2;
private JFrame frame;
private DefaultTableModel model;
private DefaultTableModel model2;
private JScrollPane pane1;
private JScrollPane pane2;
private SearchRenderer1 myRenderer;
private SearchRenderer1 myRenderer2;
TableExample() {} //constructor
public JPanel createTable() {
JPanel panel = new JPanel();
//creating tables and table models
model = new DefaultTableModel(data, title);
model2 = new DefaultTableModel(data2, title2);
table = new JTable(model);
table2 = new JTable(model2);
//setting renderers
myRenderer = new SearchRenderer1();
table.setDefaultRenderer(String.class, myRenderer);
table.getColumnModel().getColumn(0).setCellRenderer(myRenderer);
table.getColumnModel().getColumn(1).setCellRenderer(myRenderer);
myRenderer2 = new SearchRenderer1();
table2.setDefaultRenderer(String.class, myRenderer2);
table2.getColumnModel().getColumn(0).setCellRenderer(myRenderer2);
table2.getColumnModel().getColumn(1).setCellRenderer(myRenderer2);
//setting sizes
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.getColumnModel().getColumn(0).setPreferredWidth(60);
table.getColumnModel().getColumn(1).setPreferredWidth(60);
table2.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table2.getColumnModel().getColumn(0).setPreferredWidth(60);
table2.getColumnModel().getColumn(1).setPreferredWidth(60);
//Drag&Drop operations
table.setDragEnabled(true);
table2.setDropMode(DropMode.INSERT);
table2.setTransferHandler(new ListHandler1(model2));
pane1 = new JScrollPane(table);
pane2 = new JScrollPane(table2);
pane1.setPreferredSize(new Dimension(150,300));
pane2.setPreferredSize(new Dimension(150,300));
updateRowHeights();
updateRowHeights2();
panel.add(pane1);
panel.add(pane2);
return panel;
}
void showTable() {
//create and show frame
JPanel testPanel = createTable();
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(testPanel);
frame.pack();
frame.setVisible(true);
}//showTable
void updateRowHeights() {
for (int row = 0; row < table.getRowCount(); row++) {
int rowHeight = table.getRowHeight();
Component comp = table.prepareRenderer(table.getCellRenderer(row, 1), row, 1);
rowHeight = Math.max(rowHeight, comp.getPreferredSize().height);
table.setRowHeight(row, rowHeight);
}
}
void updateRowHeights2() {
for (int row = 0; row < table2.getRowCount(); row++) {
int rowHeight = table2.getRowHeight();
Component comp2 = table2.prepareRenderer(table2.getCellRenderer(row, 1), row, 1);
rowHeight = Math.max(rowHeight, comp2.getPreferredSize().height);
table2.setRowHeight(row, rowHeight);
}
}
public static void main(String[] args) {
TableExample example = new TableExample();
example.showTable();
}//main
@Override
public void tableChanged(TableModelEvent e) {
updateRowHeights();
updateRowHeights2();
}
}//TableExample
ListHandler
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import javax.swing.TransferHandler;
import javax.swing.table.DefaultTableModel;
public class ListHandler1 extends TransferHandler {
DefaultTableModel model = new DefaultTableModel();
ListHandler1(DefaultTableModel tableModel) {
this.model=tableModel;
} //constructor
/**
*
*/
private static final long serialVersionUID = 1L;
/* canImport: This method tests suitability of a drop operation. Here we filter out the clipboard paste operations
* and allow only String drop operations. If the method returns false, the drop operation is cancelled.(non-Javadoc)
* @see javax.swing.TransferHandler#canImport(javax.swing.TransferHandler.TransferSupport)
*/
public boolean canImport(TransferSupport support) {
if (!support.isDrop()) {
return false;
}
return support.isDataFlavorSupported(DataFlavor.stringFlavor);
}
/*The importData() method transfers the data from the clipboard or from the drag and drop operation to the drop location.
* (non-Javadoc)
* @see javax.swing.TransferHandler#importData(javax.swing.TransferHandler.TransferSupport)
*/
public boolean importData(TransferSupport support) {
if (!canImport(support)) {
return false;
}
Transferable transferable = support.getTransferable(); //The Transferable is the class, where the data is bundled.
String line;
try {
line = (String) transferable.getTransferData(DataFlavor.stringFlavor); //We retrieve our data.
} catch (Exception e) {
return false;
}
String item [] = line.split("\t");
model.addRow(new Object[]{item[0],item[1]});
return true;
}
}
SearchRenderer：
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class SearchRenderer1 extends JTextArea implements TableCellRenderer {
private static final long serialVersionUID = 1L;
public SearchRenderer1() {
setLineWrap(true);
setWrapStyleWord(true);
} //constructor
public Component getTableCellRendererComponent (JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column ) {
this.setText((String)value);
//for update row height
this.setSize(table.getColumnModel().getColumn(column).getWidth(),Short.MAX_VALUE);
if (isSelected) {
this.setBackground(new java.awt.Color(255, 240, 200));
}
else {
this.setBackground(new java.awt.Color(255, 255, 255));
}
return this;
}//getTableCellRendererComponent
}