//Link to the Code:
//http://www.rntsoft.com/Tutorial/Java/0240__Swing/CreatingaJTablewithrowsofvariableheight.htm
//In this Example it is suggested to use the line:
//table.setRowHeight(row, getPreferredSize().height + row * 10);
//to set the variable Row height in a Cell of a JTable.
//This works so far; however, this call triggers a new Layout of the table
//and causes the CellRenderer to render this Cell again. So this code
//creates a loop.
//I found a snippet where this is solved by testing, if the preferredSize
//of the component + the offset is equal to the height of the row. If it
//is equal, the new RowHeight won't be set and the call will be skipped.
//Examplecode:
//int offset = row * 10;
//if (getPreferredSize().height+offset != table.getRowHeight(row)) {
// table.setRowHeight(row, getPreferredSize().height +offset);
//}
//best regards
//Matthias Bonora (mat.bonora AT gmail.com)
import java.awt.Color;
import java.awt.Component;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;
public class Main {
public static void main(String[] argv) {
JFrame demoFrame = new JFrame("Variable Row Height Table Demo");
StringTableModel imageTableModel = new StringTableModel();
JTable imageTable = new JTable(imageTableModel);
imageTable.getColumnModel().getColumn(0).setCellRenderer(new VariableRowHeightRenderer());
demoFrame.getContentPane().add(new JScrollPane(imageTable));
demoFrame.pack();
demoFrame.setVisible(true);
}
}
class VariableRowHeightRenderer extends JLabel implements TableCellRenderer {
public VariableRowHeightRenderer() {
super();
setOpaque(true);
setHorizontalAlignment(JLabel.CENTER);
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
if (isSelected) {
setBackground(UIManager.getColor("Table.selectionBackground"));
}
if (hasFocus) {
setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
if (table.isCellEditable(row, column)) {
super.setForeground(UIManager.getColor("Table.focusCellForeground"));
super.setBackground(UIManager.getColor("Table.focusCellBackground"));
}
} else {
setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
}
setText((String) (value));
table.setRowHeight(row, getPreferredSize().height + row * 10);
return this;
}
}
class StringTableModel extends AbstractTableModel {
public static final int IMG_COL = 0;
public String[] m_colNames = { "Variable Dimension" };
public Class[] m_colTypes = { String.class };
public StringTableModel() {
super();
}
public int getColumnCount() {
return m_colNames.length;
}
public int getRowCount() {
return 3;
}
public String getColumnName(int col) {
return "" + col;
}
public Object getValueAt(int row, int col) {
return "aa";
}
}