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| public class MultiLineTableCellRenderer implements TableCellRenderer {
private static final Border SAFE_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1);
private static final Border DEFAULT_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1);
protected static Border noFocusBorder = DEFAULT_NO_FOCUS_BORDER;
private Color unselectedForeground;
private Color unselectedBackground;
private JTextArea textarea;
private JPanel panel;
public MultiLineTableCellRenderer() {
panel = new JPanel(new GridBagLayout());
textarea = new JTextArea();
textarea.setEditable(false);
textarea.setOpaque(false);
panel.setBorder(getNoFocusBorder());
textarea.setBorder(null);
textarea.setName("Table.cellRenderer");
textarea.setLineWrap(true);
textarea.setWrapStyleWord(true);
GridBagConstraints gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.HORIZONTAL;
panel.add(textarea, gbc);
panel.setOpaque(true);
}
public MultiLineTableCellRenderer setWrapStyleWord(boolean style) {
textarea.setWrapStyleWord(style);
return this;
}
public MultiLineTableCellRenderer setInsets(int thickness) {
return setInsets(thickness,thickness,thickness,thickness);
}
public MultiLineTableCellRenderer setInsets(int top, int left,
int bottom, int right) {
textarea.setBorder(BorderFactory.createEmptyBorder(top,left,bottom,right));
return this;
}
private Border getNoFocusBorder() {
Border border = UIManager.getBorder("Table.cellNoFocusBorder");
if (System.getSecurityManager() != null) {
if (border != null) return border;
return SAFE_NO_FOCUS_BORDER;
} else if (border != null) {
if (noFocusBorder == null || noFocusBorder == DEFAULT_NO_FOCUS_BORDER) {
return border;
}
}
return noFocusBorder;
}
public void setForeground(Color c) {
if ( textarea!=null ) textarea.setForeground(c);
unselectedForeground = c;
}
public void setBackground(Color c) {
textarea.setBackground(c);
panel.setBackground(c);
unselectedBackground = c;
}
public void updateUI() {
textarea.updateUI();
setForeground(null);
setBackground(null);
}
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (table == null) {
return panel;
}
TableColumn tableColumn = table.getColumnModel().getColumn(table.convertColumnIndexToModel(column));
Color fg = null;
Color bg = null;
JTable.DropLocation dropLocation = table.getDropLocation();
if (dropLocation != null
&& !dropLocation.isInsertRow()
&& !dropLocation.isInsertColumn()
&& dropLocation.getRow() == row
&& dropLocation.getColumn() == column) {
fg = UIManager.getColor("Table.dropCellForeground");
bg = UIManager.getColor("Table.dropCellBackground");
isSelected = true;
}
if (isSelected) {
textarea.setForeground(fg == null ? table.getSelectionForeground()
: fg);
panel.setBackground(bg == null ? table.getSelectionBackground()
: bg);
} else {
Color background = unselectedBackground != null
? unselectedBackground
: table.getBackground();
if (background == null || background instanceof javax.swing.plaf.UIResource) {
Color alternateColor = UIManager.getColor("Table.alternateRowColor");
if (alternateColor != null && row % 2 != 0) {
background = alternateColor;
}
}
textarea.setForeground(unselectedForeground != null
? unselectedForeground
: table.getForeground());
panel.setBackground(background);
}
textarea.setFont(table.getFont());
if (hasFocus) {
Border border = null;
if (isSelected) {
border = UIManager.getBorder("Table.focusSelectedCellHighlightBorder");
}
if (border == null) {
border = UIManager.getBorder("Table.focusCellHighlightBorder");
}
panel.setBorder(border);
if (!isSelected && table.isCellEditable(row, column)) {
Color col;
col = UIManager.getColor("Table.focusCellForeground");
if (col != null) {
textarea.setForeground(col);
}
col = UIManager.getColor("Table.focusCellBackground");
if (col != null) {
panel.setBackground(col);
}
}
} else {
panel.setBorder(getNoFocusBorder());
}
setValue(value);
textarea.setMaximumSize(new Dimension(tableColumn.getWidth(),0));
textarea.doLayout();
textarea.setSize(new Dimension(tableColumn.getWidth(),(int)textarea.getPreferredSize().getHeight()));
panel.setSize(new Dimension(tableColumn.getWidth(),(int)textarea.getPreferredSize().getHeight()));
return panel;
}
public boolean isOpaque() {
Color back = panel.getBackground();
Component p = panel.getParent();
if (p != null) {
p = p.getParent();
}
// p should now be the JTable.
boolean colorMatch = (back != null) && (p != null) &&
back.equals(p.getBackground()) &&
p.isOpaque();
return !colorMatch && panel.isOpaque();
}
protected void setValue(Object value) {
textarea.setText((value == null) ? "" : value.toString());
}
} |
