Java Doc for DefaultTableCellRenderer.java in  » 6.0-JDK-Core » swing » javax » swing » table » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Implementation Note: This class inherits from JLabel, a standard component class. However JTable employs a unique mechanism for rendering its cells and therefore requires some slightly modified behavior from its cell renderer. The table class defines a single cell renderer and uses it as a as a rubber-stamp for rendering all cells in the table; it renders the first cell, changes the contents of that cell renderer, shifts the origin to the new location, re-draws it, and so on. The standard JLabel component was not designed to be used this way and we want to avoid triggering a revalidate each time the cell is drawn. This would greatly decrease performance because the revalidate message would be passed up the hierarchy of the container to determine whether any other components would be affected. As the renderer is only parented for the lifetime of a painting operation we similarly want to avoid the overhead associated with walking the hierarchy for painting operations. So this class overrides the validate, invalidate, revalidate, repaint, and firePropertyChange methods to be no-ops and override the isOpaque method solely to improve performance. If you write your own renderer, please keep this performance consideration in mind.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see java.beans.XMLEncoder .
version:
   1.52 05/05/07
author:
   Philip Milne
See Also:   JTable

During a printing operation, this method will be called with isSelected and hasFocus values of false to prevent selection and focus from appearing in the printed output.

During a printing operation, this method will be called with isSelected and hasFocus values of false to prevent selection and focus from appearing in the printed output. To do other customization based on whether or not the table is being printed, check the return value from javax.swing.JComponent.isPaintingForPrint .
Parameters:
  table - the JTable
Parameters:
  value - the value to assign to the cell at[row, column]
Parameters:
  isSelected - true if cell is selected
Parameters:
  hasFocus - true if cell has focus
Parameters:
  row - the row of the cell to render
Parameters:
  column - the column of the cell to render the default table cell renderer
See Also:   javax.swing.JComponent.isPaintingForPrint