我创建了一个具有一些不错功能的JTable。我的问题是，当我调整打开框架的大小时，它不会调整大小。有人可以帮助我修改我的代码，使其按预期大小进行调整吗？我没有尝试过一些发现的帖子想法，但并没有帮助我。因此，我尝试通过一些布局思想将JPanel添加到另一面板上。我还尝试过在resizeaction上使用ComponentListeners和setSize。
代码：
public class TableyTable extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L;
public JTableHeader header;
public JTable table;
public JScrollPane scrollPane;
public JPopupMenu renamePopup;
public JTextField text;
public TableColumn column;
private boolean headerEditable = false;
private boolean tableEditable = false;
public static final Dimension SCREEN_SIZE = Toolkit.getDefaultToolkit().getScreenSize();
public static final int MIN_ROW_HEIGHT = (int)SCREEN_SIZE.getHeight()/36;
public static final int MIN_ROW_WIDTH = (int)SCREEN_SIZE.getWidth()/108;
public TableyTable(int row, int column) {
init(row, column);
}
public void init(int row, int column) {
table = new JTable(row, column) {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public boolean isCellEditable(int row, int column) {
if (tableEditable) return true;
return false;
}
};
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.changeSelection(0, 0, false, false);
header = table.getTableHeader();
header.addMouseListener(new MouseAdapter(){
@Override
public void mouseClicked(MouseEvent event) {
if (event.getClickCount() == 2 && headerEditable) {
editColumnAt(event.getPoint());
}
}
});
text = new JTextField();
text.setBorder(null);
text.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (headerEditable) renameColumn();
}
});
table.setRowSelectionAllowed(false);
table.setCellSelectionEnabled(true);
renamePopup = new JPopupMenu();
renamePopup.setBorder(new MatteBorder(0, 1, 1, 1, Color.DARK_GRAY));
renamePopup.add(text);
scrollPane = new JScrollPane( table );
scrollPane.setRowHeaderView(buildRowHeader(table));
table.setRowHeight(MIN_ROW_HEIGHT);
TableColumnModel cm = table.getColumnModel();
for(int i = 0; i < table.getColumnModel().getColumnCount(); i++)
cm.getColumn(i).setWidth(200);
table.setColumnModel(cm);
add(scrollPane);
}
public void setHeaderEditable(boolean b) {
headerEditable = b;
}
public boolean isHeaderEditable() {
return headerEditable;
}
public void setTableEditable(boolean b) {
tableEditable = b;
}
public boolean isTableEditable() {
return tableEditable;
}
private void editColumnAt(Point p) {
int columnIndex = header.columnAtPoint(p);
if (columnIndex != -1) {
column = header.getColumnModel().getColumn(columnIndex);
Rectangle columnRectangle = header.getHeaderRect(columnIndex);
text.setText(column.getHeaderValue().toString());
renamePopup.setPreferredSize(new Dimension(columnRectangle.width, columnRectangle.height - 1));
renamePopup.show(header, columnRectangle.x, 0);
text.requestFocusInWindow();
text.selectAll();
}
}
private void renameColumn() {
column.setHeaderValue(text.getText());
renamePopup.setVisible(false);
header.repaint();
}
private static JList<Object> buildRowHeader(JTable table) {
final Vector<String> headers = new Vector<String>();
for (int i = 0; i < table.getRowCount(); i++) {
String name = "";
if (i < 10) {
name += "0";
}
if (i < 100) {
name += "0";
}
name += i;
headers.add(name);
}
ListModel<Object> lm = new AbstractListModel<Object>() {
/**
*
*/
private static final long serialVersionUID = 1L;
public int getSize() {
return headers.size();
}
public Object getElementAt(int index) {
return headers.get(index);
}
};
final JList<Object> rowHeader = new JList<>(lm);
rowHeader.setOpaque(false);
rowHeader.setFixedCellWidth(TableyTable.MIN_ROW_HEIGHT);
MouseInputAdapter mouseAdapter = new MouseInputAdapter() {
Cursor oldCursor;
Cursor RESIZE_CURSOR = Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR);
int index = -1;
int oldY = -1;
@Override
public void mouseMoved(MouseEvent e) {
super.mouseMoved(e);
int previ = getLocationToIndex(new Point(e.getX(), e.getY() - 3));
int nexti = getLocationToIndex(new Point(e.getX(), e.getY() + 3));
if (previ != -1 && previ != nexti) {
if (!isResizeCursor()) {
oldCursor = rowHeader.getCursor();
rowHeader.setCursor(RESIZE_CURSOR);
index = previ;
}
} else if (isResizeCursor()) {
rowHeader.setCursor(oldCursor);
}
}
private int getLocationToIndex(Point point) {
int i = rowHeader.locationToIndex(point);
if (!rowHeader.getCellBounds(i, i).contains(point)) {
i = -1;
}
return i;
}
@Override
public void mouseReleased(MouseEvent e) {
super.mouseReleased(e);
if (isResizeCursor()) {
rowHeader.setCursor(oldCursor);
index = -1;
oldY = -1;
}
}
@Override
public void mouseDragged(MouseEvent e) {
super.mouseDragged(e);
if (isResizeCursor() && index != -1) {
int y = e.getY();
if (oldY != -1) {
int inc = y - oldY;
int oldRowHeight = table.getRowHeight(index);
int oldNextRowHeight = table.getRowHeight(index+1);
if (oldRowHeight > MIN_ROW_HEIGHT || inc > 0) {
int rowHeight = Math.max(MIN_ROW_HEIGHT, oldRowHeight + inc);
table.setRowHeight(index, rowHeight);
if (rowHeader.getModel().getSize() > index + 1) {
int rowHeight1 = table.getRowHeight(index + 1) - inc;
rowHeight1 = Math.max(MIN_ROW_HEIGHT, rowHeight1);
table.setRowHeight(index + 1, rowHeight1);
}
}
if (table.getRowCount()>index+1)
table.setRowHeight(1+index, oldNextRowHeight);
else System.out.println("HI");
}
oldY = y;
}
}
private boolean isResizeCursor() {
return rowHeader.getCursor() == RESIZE_CURSOR;
}
};
rowHeader.addMouseListener(mouseAdapter);
rowHeader.addMouseMotionListener(mouseAdapter);
rowHeader.addMouseWheelListener(mouseAdapter);
rowHeader.setCellRenderer(new RowHeaderRenderer(table));
rowHeader.setBackground(table.getBackground());
rowHeader.setForeground(table.getForeground());
return rowHeader;
}
static class RowHeaderRenderer extends JLabel implements ListCellRenderer<Object> {
/**
*
*/
private static final long serialVersionUID = 1L;
private JTable table;
RowHeaderRenderer(JTable table) {
this.table = table;
JTableHeader header = this.table.getTableHeader();
setOpaque(true);
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
setHorizontalAlignment(CENTER);
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
setDoubleBuffered(true);
}
public Component getListCellRendererComponent(JList<?> list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
setText((value == null) ? "" : value.toString());
setPreferredSize(null);
setPreferredSize(new Dimension((int) getPreferredSize().getWidth(), table.getRowHeight(index)));
list.firePropertyChange("cellRenderer", 0, 1);
return this;
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Tabley");
TableyTable table = new TableyTable(1000, 18278);
table.setHeaderEditable(true);
table.setTableEditable(true);
frame.add(table);
frame.setSize(new Dimension(700, 500));
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
答案 0 :(得分：3)
如在tutorial中所述，您需要设置一个LayoutManager并相应地添加JScrollPane：
setLayout(new BorderLayout());
add(scrollPane,BorderLayout.CENTER);