/
MainPanel.java
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/
MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.util.Objects;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
public final class MainPanel extends JPanel {
public static final int BW1 = 1;
public static final int BW2 = 2;
public static final int CELL_SZ = 18;
private MainPanel() {
super(new GridBagLayout());
String[] columnNames = {"1", "2", "3", "4", "5", "6", "7", "8", "9"};
Integer[][] data = {
{5, 3, 0, 0, 7, 0, 0, 0, 0},
{6, 0, 0, 1, 9, 5, 0, 0, 0},
{0, 9, 8, 0, 0, 0, 0, 6, 0},
{8, 0, 0, 0, 6, 0, 0, 0, 3},
{4, 0, 0, 8, 0, 3, 0, 0, 1},
{7, 0, 0, 0, 2, 0, 0, 0, 6},
{0, 6, 0, 0, 0, 0, 2, 8, 0},
{0, 0, 0, 4, 1, 9, 0, 0, 5},
{0, 0, 0, 0, 8, 0, 0, 7, 9}
};
TableModel model = new DefaultTableModel(data, columnNames) {
@Override public Class<?> getColumnClass(int column) {
return Integer.class;
}
@Override public boolean isCellEditable(int row, int column) {
return data[row][column] == 0;
}
};
JTable table = new JTable(model) {
@Override public Dimension getPreferredScrollableViewportSize() {
return super.getPreferredSize();
}
};
for (int i = 0; i < table.getRowCount(); i++) {
int a = (i + 1) % 3 == 0 ? BW2 : BW1;
table.setRowHeight(i, CELL_SZ + a);
}
table.setCellSelectionEnabled(true);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.getTableHeader().setReorderingAllowed(false);
table.setBorder(BorderFactory.createEmptyBorder());
table.setShowVerticalLines(false);
table.setShowHorizontalLines(false);
table.setIntercellSpacing(new Dimension());
table.setRowMargin(0);
table.getColumnModel().setColumnMargin(0);
JTextField editor = new JTextField();
editor.setHorizontalAlignment(SwingConstants.CENTER);
// editor.setBorder(BorderFactory.createLineBorder(Color.RED));
table.setDefaultEditor(Integer.class, new DefaultCellEditor(editor) {
@Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
Object v = Objects.equals(value, 0) ? "" : value;
return super.getTableCellEditorComponent(table, v, isSelected, row, column);
}
@Override public Object getCellEditorValue() {
return editor.getText().isEmpty() ? 0 : super.getCellEditorValue();
}
});
table.setDefaultRenderer(Integer.class, new SudokuCellRenderer(data));
TableColumnModel m = table.getColumnModel();
m.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
for (int i = 0; i < m.getColumnCount(); i++) {
TableColumn col = m.getColumn(i);
int a = (i + 1) % 3 == 0 ? BW2 : BW1;
col.setPreferredWidth(CELL_SZ + a);
col.setResizable(false);
}
JScrollPane scroll = new JScrollPane(table);
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
scroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scroll.setBorder(BorderFactory.createEmptyBorder());
scroll.setViewportBorder(BorderFactory.createMatteBorder(BW2, BW2, 0, 0, Color.BLACK));
scroll.setColumnHeader(new JViewport());
scroll.getColumnHeader().setVisible(false);
add(scroll);
setPreferredSize(new Dimension(320, 240));
}
private static class SudokuCellRenderer extends DefaultTableCellRenderer {
private final Border b0 = BorderFactory.createMatteBorder(0, 0, BW1, BW1, Color.GRAY);
private final Border b1 = BorderFactory.createMatteBorder(0, 0, BW2, BW2, Color.BLACK);
private final Border b2 = BorderFactory.createCompoundBorder(
BorderFactory.createMatteBorder(0, 0, BW2, 0, Color.BLACK),
BorderFactory.createMatteBorder(0, 0, 0, BW1, Color.GRAY));
private final Border b3 = BorderFactory.createCompoundBorder(
BorderFactory.createMatteBorder(0, 0, 0, BW2, Color.BLACK),
BorderFactory.createMatteBorder(0, 0, BW1, 0, Color.GRAY));
private final Integer[][] mask;
@SuppressWarnings("PMD.UseVarargs")
protected SudokuCellRenderer(Integer[][] src) {
super();
Integer[][] dest = new Integer[src.length][src[0].length];
for (int i = 0; i < src.length; i++) {
System.arraycopy(src[i], 0, dest[i], 0, src[0].length);
}
this.mask = dest;
}
@Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
boolean isEditable = mask[row][column] == 0;
Component c = super.getTableCellRendererComponent(
table, value, isEditable && isSelected, hasFocus, row, column);
c.setFont(isEditable ? c.getFont() : c.getFont().deriveFont(Font.BOLD));
if (c instanceof JLabel) {
JLabel l = (JLabel) c;
l.setHorizontalAlignment(CENTER);
if (isEditable && Objects.equals(value, 0)) {
l.setText(" ");
}
boolean rf = (row + 1) % 3 == 0;
boolean cf = (column + 1) % 3 == 0;
if (rf && cf) {
l.setBorder(b1);
} else if (rf) {
l.setBorder(b2);
} else if (cf) {
l.setBorder(b3);
} else {
l.setBorder(b0);
}
}
return c;
}
}
public static void main(String[] args) {
EventQueue.invokeLater(MainPanel::createAndShowGui);
}
private static void createAndShowGui() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
JFrame frame = new JFrame("@title@");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}