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| public class JTableRendererDemo {
public static void main(String[] args) {
JFrame frame = new JFrame("Démo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JCheckBox renderingButton = new JCheckBox("Activée");
JTable table = createTable();
TableColumn column = table.getColumnModel().getColumn(2);
BorderTableCellRenderer cellRenderer = new BorderTableCellRenderer(table.getDefaultRenderer(String.class));
column.setCellRenderer(cellRenderer);
renderingButton.setSelected(true);
renderingButton.addActionListener(e-> setRenderingEnabled(renderingButton.isSelected(), table, cellRenderer));
frame.add(new JScrollPane(table));
frame.add(renderingButton, BorderLayout.SOUTH);
frame.setSize(600, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void setRenderingEnabled(boolean selected, JTable table, BorderTableCellRenderer cellRenderer) {
if ( cellRenderer.isEnabled()!=selected ) {
cellRenderer.setEnabled(selected);
table.updateUI();
}
}
private static JTable createTable() {
TableModel model = new AbstractTableModel() {
Object[][] data = {
{ 1, "abc", "def", "ghi" },
{ 2, null, null, null },
{ 3, null, "def", "ghi" }
};
String[] columns = { "id", "A", "B", "C" };
@Override
public String getColumnName(int col) {
return columns[col];
}
@Override
public boolean isCellEditable(int row, int col) {
return col>0;
}
@Override
public Class<?> getColumnClass(int col) {
switch(col) {
case 0:
return Integer.class;
default:
return String.class;
}
}
@Override
public int getColumnCount() {
return columns.length;
}
@Override
public int getRowCount() {
return data.length;
}
@Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
@Override
public void setValueAt(Object value, int row, int col) {
data[row][col]=value;
}
};
JTable table = new JTable(model);
return table;
}
private static class BorderTableCellRenderer implements TableCellRenderer {
private final static BasicStroke STROKE = new BasicStroke(1.0f,
BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND,
0.0f, new float[]{2f,4f}, 0.0f);
private final static Border BORDER = BorderFactory.createStrokeBorder(STROKE, Color.RED);
private TableCellRenderer renderer;
private boolean enabled;
public BorderTableCellRenderer(TableCellRenderer renderer) {
this.renderer=renderer;
this.enabled=true;
}
public void setEnabled(boolean enabled) {
this.enabled=enabled;
}
public boolean isEnabled() {
return enabled;
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
JComponent component = (JComponent)renderer.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if ( enabled /*&& isSelected*/ ) {
boolean isnull=true;
for(int i=1; i<4; i++) {
String valueCol = (String) table.getValueAt(row, i);
if ( valueCol!=null && !valueCol.trim().isEmpty() ) {
isnull=false;
break;
}
}
if ( isnull ) {
component.setBorder(BorderFactory.createCompoundBorder(component.getBorder(), BORDER));
}
}
return component;
}
}
} |
