Creating a JTable with rows of variable height : JTable « Swing « Java Tutorial






  1. Java Tutorial
  2. Swing
  3. JTable
//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";
  }
}








14.58.JTable
14.58.1.Creating a JTableCreating a JTable
14.58.2.Creating a JTable with rows of variable height
14.58.3.Creating a Scrollable JTable Component
14.58.4.public JTable(Vector rowData, Vector columnNames)public JTable(Vector rowData, Vector columnNames)
14.58.5.Retrieve the value in the visible cell (1,2) in a JTable
14.58.6.Retrieve the value in cell (1,2) from the model
14.58.7.Build a table from list data and column names
14.58.8.To change cell contents in code: setValueAt(Object value, int row, int column) method of JTable.To change cell contents in code: setValueAt(Object value, int row, int column) method of JTable.
14.58.9.Disable auto resizing to make the table horizontal scrollable
14.58.10.Manually Positioning the JTable ViewManually Positioning the JTable View
14.58.11.Selection ModesSelection Modes
14.58.12.Printing Tables SamplePrinting Tables Sample
14.58.13.Specify the print mode: public boolean print(JTable.PrintMode printMode)Specify the print mode: public boolean print(JTable.PrintMode printMode)
14.58.14.Specify a page header or footer during printingSpecify a page header or footer during printing
14.58.15.No user interaction to printNo user interaction to print
14.58.16.Listening to JTable Events with a TableModelListenerListening to JTable Events with a TableModelListener
14.58.17.Control the selection of rows or columns or individual cellsControl the selection of rows or columns or individual cells
14.58.18.Table selection mode
14.58.19.JTable with Tooltip
14.58.20.Table Selection Events and ListenersTable Selection Events and Listeners
14.58.21.Print a JTable out
14.58.22.JTable Look and Feel
14.58.23.Listening for Selection Events in a JTable Component
14.58.24.Listening for Changes to the Rows and Columns of a JTable Component
14.58.25.Listening for Column-Related Changes in a JTable Component
14.58.26.Programmatically Starting Cell Editing in a JTable Component
14.58.27.Select a column - column 0 in a JTable
14.58.28.Select an additional range of columns - columns 1 to 2
14.58.29.Deselect a range of columns - columns 0 to 1
14.58.30.Select a row - row 0
14.58.31.Select an additional range of rows - rows 1 to 2
14.58.32.Deselect a range of rows - rows 0 to 1
14.58.33.Select a cell: cell (2,1)
14.58.34.Select all cells
14.58.35.Deselect all cells
14.58.36.Enable row selection (default) in a JTable
14.58.37.Enable column selection in a JTable
14.58.38.Enable cell selection in a JTable
14.58.39.When the width of a column is changed, the width of the right-most column is changed
14.58.40.When the width of a column is changed, all columns to the right are resized
14.58.41.When the width of a column is changed, only the columns to the left and right of the margin change
14.58.42.When the width of a column is changed, the widths of all columns are changed
14.58.43.Use a regexFilter to filter table content
14.58.44.Don't show any grid lines
14.58.45.Show only vertical grid lines
14.58.46.Show only horizontal grid lines
14.58.47.Set the grid color
14.58.48.Show both horizontal and vertical grid lines (the default)
14.58.49.Getting the Gap Size Between Cells in a JTable Component
14.58.50.Add 5 spaces to the left and right sides of a cell.
14.58.51.Scrolling a Cell to the Center of a JTable Component
14.58.52.Setting Tool Tips on Cells in a JTable Component
14.58.53.Getting the Number of Rows and Columns in a JTable Component
14.58.54.Making a Cell Visible in a JTable Component
14.58.55.Increase the row height
14.58.56.Determining If a Cell Is Visible in a JTable Component
14.58.57.Allowing the User to Resize a Column in a JTable Component
14.58.58.Disabling User Edits in a JTable
14.58.59.Creating image out of a JTable