Set table header background

[seema165]

Hi,

I am trying to get my JTable table's header to setOpaque(false) so I can see the background image in the same way I can see it for my table rows and columns.

Can someone please tell me how to do this, if it is even possible to do.

Thanks in advance

 

[timw]

You might have to subclass the default TableCellRenderer which the JTableHeader uses to render the headers. Have a look at the setDefaultRenderer(TableCellRenderer) method of JTableHeader.

Tim

 

[seema165]

I have a TableCellRenderer class which extends default.
My code is:

public class TennisTableCellRenderer extends DefaultTableCellRenderer {

protected boolean isSelected = false;
protected Color selectionColor;

public TennisTableCellRenderer() {

super();

}

public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {

Component comp = table.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(table,value,isSelected, hasFocus, row, column);

if (comp instanceof JComponent){
((JComponent)comp).setOpaque(false);
((JComponent)comp).setBorder(BorderFactory.createEmptyBorder(2,1,1,1));
//Color oldCol = table.getSelectionBackground();
//selectionColor = new Color(oldCol.getRed(), oldCol.getGreen(), oldCol.getBlue(), 0); //128);
//((JComponent)comp).setBackground(new Color(0,0,0,0));

}
return comp;
}

//public void paintComponent(Graphics g) {
//if (isSelected) {
// g.setColor(selectionColor);
// g.fillRect(0, 0, getWidth(), getHeight());

//}
// super.paintComponent(g);
//}


What I'm trying to do (which I'm not sure if its possible or not) is on my table header, I get the headings on a grey rectangle bar. I want to keep my headings but make the grey bar transparent.

IS this at all possible? If so, how?

Thanks

 

[seema165]

Ok, I've worked it out, though I'm not sure if it was the best way to do it. I did:

table.getTableHeader().setBackground(new Color(0,0,0,0));

 

[Diancecht]

Didn't test this, but what about

yourJTable.getJTableHeader().setBackground(Color.yourColor);

?

Cheers,
Dian