Java Swing JMenu's icon is not placed properly inside the menu

[shariq khan]

I add only an icon to my JMenu.

If I use setPreferredSize(size of the icon) on JMenu, my icon is shifted to right in the JMenu.

If I use setSize(size of the icon) on JMenu, my icon is placed in center in the JMenu but has gaps on both sides.

Is there a way to align my icon properly or to expand so that its fills the menu space?

I can share my code snippets if required. Pic is attached.

Thanks

[Campbell Ritchie]

Welcome to the Ranch

Please show us the code for that button and the icon.

[shariq khan]

My menu class:

public class RGWMenu extends JMenu 
{
private void initialize()
	{		
		setOpaque(false);
		setUI((MenuItemUI) BasicMenuUI.createUI(this));
		setContentAreaFilled(false);             
		setFocusPainted(false);
		setBorderPainted(false);
		setFont(UXStandards.MENU_TEXT_FONT);
		setForeground(UXStandards.MENU_TEXT_COLOR);		
		setLayout(new FlowLayout(FlowLayout.LEFT));		
	}
}

My Applet:

public class RGWSViewApplet extends JApplet {
public void init(){
new CreateUIComponents(canvas, layerPanel, this);
}
}

My UI Class:

public class CreateUIComponents extends RGWSViewApplet{
private RGWMenu terrainAnalysisMenu;

public CreateUIComponents(RGWSWindowGLCanvas wwdCanvas,LayerPanel lPanel, final RGWSViewApplet rgwsApplet)
	{
terrainAnalysisMenu = new RGWMenu();
trnAnalysisImg = new   ImageIcon(ImageIO.read(this.getClass().getClassLoader().getResourceAsStream("images/MainNav_Btn_TrnAnalysis.png")));

trnAnalysisPressedImg = new ImageIcon(ImageIO.read(this.getClass().getClassLoader().getResourceAsStream("images/MainNav_Btn_TrnAnalysis_Pressed.png")));

terrainAnalysisMenu.setPreferredSize(new Dimension(80,70));
terrainAnalysisMenu.setIcon(trnAnalysisImg);
terrainAnalysisMenu.setHorizontalAlignment(SwingConstants.CENTER );**//tried LEFT and RIGHT too, RIGHT works when I run applet but in browser there is no effect**

menubar.setLayout(new BoxLayout(menubar, 
            BoxLayout.LINE_AXIS)); 
menubar.add(fileMenu);
menubar.add(new RGWSeparator(SwingConstants.VERTICAL)); 
menubar.add(terrainAnalysisMenu);

terrainAnalysisMenu.addMenuListener(new MenuListener() {

        @Override
        public void menuSelected(MenuEvent e) {
            RGWMenu menu = (RGWMenu) e.getSource();
            menu.setIcon(trnAnalysisPressedImg);
        }

        @Override
        public void menuDeselected(MenuEvent e) {
            RGWMenu menu = (RGWMenu) e.getSource();
            menu.setIcon(trnAnalysisImg);
        }

        @Override
        public void menuCanceled(MenuEvent e) {
            RGWMenu menu = (RGWMenu) e.getSource();
            menu.setIcon(trnAnalysisImg);
        }       
    });
}
}

I replaced setPreferredSize with setSize which led to gap on both sides instead of only on left.

I am sorry if I missed some declaration, tried to provide a minimal implementation for one of the menus. Let me know if need any specific information which could help in figuring out the problem.

Thanks for the reply