Painting a Graphic in a JTable Column Header

[Tommy Greenberg]

Hello,

I am trying to paint a graphic in the header of a column. The graphic paints but is not displayed. What I try to do is draw a graphic in a JLabel and display the label but this does not work. Can someone please look at this code and let me know where I went wrong?

 
package graphics;
 
import java.awt.Component;
import java.awt.Graphics;
import java.awt.geom.AffineTransform;
 
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
 

 
/**
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class GraphicHeader extends JLabel implements TableCellRenderer {
private AffineTransform at;
private String name = "";
private GraphicHeader gh;

private final static int CHARS_PER_LINE = 100;
private final static int NEWLINE_SIM = 15; 

public GraphicHeader(String name) {
super(name);
this.name = name;
}

public void paint(Graphics g) {
System.out.println("Calling paint on the column");
/*
at = new AffineTransform();
at.setToRotation(-Math.PI/2.0);
Graphics2D g2d = (Graphics2D)g;
g2d.setTransform(at);
g2d.setFont(new Font("Verdana", Font.BOLD, 12));

int index = 0;
int endOfStr = 0;
int newLine = 100;
String tmpToken;
while(index < name.length()) {
endOfStr = index + CHARS_PER_LINE;

if(endOfStr > (name.length()))
endOfStr = name.length();

tmpToken = name.substring(index, endOfStr);

g2d.drawString(tmpToken, -170, newLine);
index = endOfStr + 1;
newLine = newLine + NEWLINE_SIM;
} 

*/

g.drawString(name, 0, 0);

updateUI();
}
 
/* (non-Javadoc)
 * @see javax.swing.table.TableCellRenderer#getTableCellRendererComponent(javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
 */
public Component getTableCellRendererComponent(
JTable arg0,
Object arg1,
boolean arg2,
boolean arg3,
int arg4,
int arg5) {

System.out.println(arg1.getClass());

return this;
}
 
/* (non-Javadoc)
 * @see java.awt.Component#update(java.awt.Graphics)
 */
public void update(Graphics arg0) {
System.out.println("Update");
paint(arg0);
}
 
}
  

/*
 * Created on Aug 6, 2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package walgreens.tables.functions;
 
import java.awt.Color;
import java.awt.Dimension;
 
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JViewport;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
 
import graphics.GraphicHeader;
import tables.CheckCellRenderer;
 
/**
 * 
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FunctionTable {
protected JScrollPane jsp;
 
public JScrollPane getComponent() {
return jsp;
}
 
public FunctionTable() {
FunctionModel functionModel = new FunctionModel();

functionModel.setHeader();

//Create a column model for the main table. This model ignores the first 
//column added, and sets a minimum width of 150 pixels for all others.
FunctionColumnModel functionColumnModel = new FunctionColumnModel();

//Create a column model that will serve as our row header table. This
//model picks a maximum width and only stores the first column.
FunctionRowColumnModel rowHeaderModel = new FunctionRowColumnModel();

JTable jtable = new JTable(functionModel, functionColumnModel);

//Set up the header column and get it hooked up to everything
JTable headerColumn = new JTable(functionModel, rowHeaderModel);
jtable.createDefaultColumnsFromModel();
headerColumn.createDefaultColumnsFromModel();

//Make sure that selection between the main table and the header stay 
//in sync (by sharing the same model)
jtable.setSelectionModel(headerColumn.getSelectionModel());

//Make the header column look pretty
//headerColumn.setMaximumSize(new Dimension(40,10000));
headerColumn.setBackground(Color.lightGray);
//If you want to make the header selection invisible uncomment this 
//next line
headerColumn.setSelectionBackground(Color.lightGray);
headerColumn.setColumnSelectionAllowed(true);
headerColumn.setCellSelectionEnabled(true);

//put it in a viewport that we can control a bit
JViewport jv = new JViewport();
jv.setView(headerColumn);
jv.setPreferredSize(headerColumn.getMaximumSize());

//Without shutting off autoResizeMode, our tables won't scroll
//correctly (Horizontally, anyway)
jtable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
headerColumn.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

//We have to manually attach the row headers, but after that, the scroll
//pane keeps them in sync
jsp = new JScrollPane(jtable);
jsp.setRowHeader(jv);

}

}
  

 
/*
 * Created on Aug 9, 2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package tables.functions;
 
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableColumn;
 
/**
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FunctionRowColumnModel extends DefaultTableColumnModel {
private boolean first = true;

public void addColumn(TableColumn tc) {
if(first){
//create first column of functions
tc.setMaxWidth(35);

super.addColumn(tc);
first = false;
}
//Drop the rest of the columns...this is the header column only
}
}
 
 

  
/*
 * Created on Aug 9, 2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package tables.functions;
 
import javax.swing.table.AbstractTableModel;
 
/**
 *
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FunctionModel extends AbstractTableModel {
private String data[] = {"","a","b","c","d","e" };
private String headers[];

public int getColumnCount() {
return data.length; 
}

public int getRowCount() { 
return 1000; 
}

public String getColumnName(int col) {
return headers[col];
}

//Synthesize some entries using the data values & the row #
public Object getValueAt(int row, int col) {
//Random num = new Random();
//return new Boolean(num.nextBoolean());
return data[col] + row;
}

public void setData() {
/* Set the value of the checkboxes from xls */
}

public void setHeader() {
headers = new String[6];
headers[0] = "";
headers[1] = "Column 1";
headers[2] = "Column 2";
headers[3] = "Column 3";
headers[4] = "Column 4";
headers[5] = "Column 5";
}

}

 
/*
 * Created on Aug 9, 2004
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package walgreens.tables.functions;
 
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableColumn;
 
import graphics.GraphicHeader;
import tables.CheckCellRenderer;
 
/**
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class FunctionColumnModel extends DefaultTableColumnModel {
private boolean first = true;

public void addColumn(TableColumn tc) {
//Drop the first column that'll be the row header
CheckCellRenderer ccr = new CheckCellRenderer();

if(first) { 
first = false; 
return; 
}

tc.setHeaderRenderer(new GraphicHeader((String) tc.getHeaderValue()));

//get column information in from of Boolean column model
tc.setCellRenderer(ccr);
tc.setMinWidth(150);
super.addColumn(tc);
}
}
 
 

These should be all the classes need, you just need to stick the table in JFrame and your good to go.

Thanks

[Tommy Greenberg]

The package "walgreens.tables.functions" in FunctionColumnModel should be
"package tables.functions"

Change that and you should be good to go.