Main.java Source code

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Here is the source code for Main.java

Source

//Link to the Code:
//http://www.java2s.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";
    }
}