Re: choosing linestyles with a combobox

Tomba wrote: 
hi,

I'm trying to let a user choose a linestyle (that is several predefined dash patterns) by selecting one out of a combobox. I try to display a preview line in each item of the combo.
The problem here is that only the selected element is painted and visible, while the dropdown list displays nothing.

Here's my cell renderer, I hope anyone knows something to solve this one. I suspect paint() is only done for the selected item but I have no clue how to solve it :(

Thanks!

private class LineCellRenderer extends JLabel implements ListCellRenderer {
private float[] value;
private JTextField width;
public LineCellRenderer(JTextField width) {
super();
setOpaque(true);
this.width = width;
}
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
this.value = (float[])value;
return this;
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
super.paint(g);

BasicStroke bStroke = new BasicStroke(Integer.valueOf(width.getText()), BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND, 5, value, 0);
Line2D line = new Line2D.Double(2, getHeight()/2, getWidth()-4, getHeight()/2);
g2.setColor(Color.BLACK);
g2.setStroke(bStroke);
g2.draw(line);
}
} 

nevermind I've solved it ;)
Just replacing the JLabel by JPanel

anyway... that was trial and error, could anyone explain that?
.

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