- 追加された行はこの色です。
- 削除された行はこの色です。
TITLE:TransferHandlerを使ってJTableの行をドラック＆ドロップ、並べ替え
#navi(../)
RIGHT:Posted by [[terai]] at 2009-09-07
*TransferHandlerを使ってJTableの行をドラック＆ドロップ、並べ替え [#fbf1230b]
JTableの行を複数選択し、ドラック＆ドロップで並べ替えを可能にするTransferHandlerを作成します。
-&jnlp;
-&jar;
-&zip;
#screenshot
**サンプルコード [#y7890e8f]
#code{{
JTable table = new JTable(model);
table.getSelectionModel().setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
table.setTransferHandler(new TableRowTransferHandler());
table.setDropMode(DropMode.INSERT_ROWS);
table.setDragEnabled(true);
}}
**解説 [#z3172930]
上記のサンプルのTransferHandler((JDK 6 で導入されたTransferHandler#canImport メソッドなどを使用しています。))は、[[TransferHandlerを使ったJListのドラック＆ドロップによる並べ替え>Swing/DnDReorderList]]のものとほぼ同じです。
----
[[JTableの行をドラッグ＆ドロップ>Swing/DnDTable]]とは異なり、複数行を選択してDrag&Dropによる移動が可能になっています。
**参考リンク [#z9df5392]
-[[Demo - BasicDnD (Drag and Drop and Data Transfer)>http://java.sun.com/docs/books/tutorial/uiswing/dnd/basicdemo.html]]
-[[Drag and drop for non-String objects>http://www.javakb.com/Uwe/Forum.aspx/java-programmer/43866/Drag-and-drop-for-non-String-objects]]
-[[Drag and Drop and Data Transfer: Examples (The Java™ Tutorials > Creating a GUI with JFC/Swing > Drag and Drop and Data Transfer)>http://java.sun.com/docs/books/tutorial/uiswing/examples/dnd/index.html#BasicDnD]]
--[[ListTransferHandler.java>http://java.sun.com/docs/books/tutorial/uiswing/examples/dnd/DropDemoProject/src/dnd/ListTransferHandler.java]]
-[[TransferHandlerを使ったJListのドラック＆ドロップによる並べ替え>Swing/DnDReorderList]]
-[[JTableの行をドラッグ＆ドロップ>Swing/DnDTable]]
**コメント [#ldd8458d]
- テスト -- [[terai]] &new{2009-09-26 (土) 02:19:20};
#code{{
//http://java.sun.com/docs/books/tutorial/uiswing/examples/dnd/index.html
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Vector;
import javax.activation.*;
import javax.swing.*;
import javax.swing.table.*;
public class DnDTableTest{
TransferHandler handler = new TableRowTransferHandler();
String[] columnNames = {"String", "Integer", "Boolean"};
Object[][] data = {
{"AAA",12,true},{"aaa",1,false},{"BBB",13,true},{"bbb",2,false},
};
private JTable makeDnDTable() {
JTable t = new JTable(new DefaultTableModel(data, columnNames) {
@Override public Class<?> getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
});
t.getSelectionModel().setSelectionMode(
ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
t.setTransferHandler(handler);
t.setDropMode(DropMode.INSERT_ROWS);
t.setDragEnabled(true);
t.setFillsViewportHeight(true);
return t;
}
public JComponent makeUI() {
JPanel p = new JPanel(new GridLayout(2,1));
p.add(new JScrollPane(makeDnDTable()));
p.add(new JScrollPane(makeDnDTable()));
p.setBorder(BorderFactory.createTitledBorder("Drag & Drop JTable"));
p.setPreferredSize(new Dimension(320, 320));
return p;
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() { createAndShowGUI(); }
});
}
public static void createAndShowGUI() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new DnDTableTest().makeUI());
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
class TableRowTransferHandler extends TransferHandler {
private int[] rows = null;
private int addIndex = -1; //Location where items were added
private int addCount = 0; //Number of items added.
private final DataFlavor localObjectFlavor;
private Object[] transferedObjects = null;
private JComponent source = null;
public TableRowTransferHandler() {
localObjectFlavor = new ActivationDataFlavor(
Object[].class, DataFlavor.javaJVMLocalObjectMimeType, "Array of items");
}
@Override protected Transferable createTransferable(JComponent c) {
source = c;
JTable table = (JTable) c;
DefaultTableModel model = (DefaultTableModel)table.getModel();
ArrayList<Object> list = new ArrayList<Object>();
for(int i: rows = table.getSelectedRows())
list.add(model.getDataVector().elementAt(i));
transferedObjects = list.toArray();
return new DataHandler(transferedObjects,localObjectFlavor.getMimeType());
}
@Override public boolean canImport(TransferHandler.TransferSupport info) {
JTable t = (JTable)info.getComponent();
boolean b = info.isDrop()&&info.isDataFlavorSupported(localObjectFlavor);
//XXX bug?
t.setCursor(b?DragSource.DefaultMoveDrop:DragSource.DefaultMoveNoDrop);
return b;
}
@Override public int getSourceActions(JComponent c) {
return TransferHandler.COPY_OR_MOVE;
}
@Override public boolean importData(TransferHandler.TransferSupport info) {
JTable target = (JTable)info.getComponent();
JTable.DropLocation dl = (JTable.DropLocation)info.getDropLocation();
DefaultTableModel model = (DefaultTableModel)target.getModel();
int index = dl.getRow();
int max = model.getRowCount();
if(index<0 || index>max) index = max;
addIndex = index;
target.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
try {
Object[] values =
(Object[])info.getTransferable().getTransferData(localObjectFlavor);
if(source==target) addCount = values.length;
for(int i=0;i<values.length;i++) {
int idx = index++;
model.insertRow(idx, (Vector)values[i]);
target.getSelectionModel().addSelectionInterval(idx, idx);
}
return true;
}catch(Exception ufe) { ufe.printStackTrace(); }
return false;
}
@Override protected void exportDone(JComponent c, Transferable t, int act) {
cleanup(c, act == TransferHandler.MOVE);
}
private void cleanup(JComponent src, boolean remove) {
if(remove && rows != null) {
JTable table = (JTable)src;
src.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
DefaultTableModel model = (DefaultTableModel)table.getModel();
if(addCount > 0) {
for(int i=0;i<rows.length;i++) {
if(rows[i]>=addIndex) { rows[i] += addCount; }
}
}
for(int i=rows.length-1;i>=0;i--) model.removeRow(rows[i]);
}
rows = null;
addCount = 0;
addIndex = -1;
}
}
}}
#comment