Hide/Show an image drawn with Graphics

Question

I have multiple images drawn with Graphics. How can I make them appear and disappear using a JCheckBox ?

private void drawImages(int index) {
   Graphics g = mNew.getGraphics();
   int x = index % this.width;
   int y = index / this.width;
   g.drawImage(imageLabelPixel.get(idImage-1), x, y, 100, 100, null);
}

Answer 1

I would do it like that:

JCheckBox cb = new JCheckBox();
ImgPanel p = new ImgPanel();

cb.addActionListener(new ActionListener(){
    @Override
    public void actionPerformed(ActionEvent evt){
        if(cb.isSelected){
            p.set(0);
        } else {
            p.set(-1);
        }
    }
});

.

public class ImgPanel extends JPanel {

    private int i = 0;
    private List<BufferedImage> imgs;

    public ImgPanel(){
        //init imgs
    }

    public void set(){
        i = 0;
        repaint();
    }

    @Override
    public void paintComponent (Graphics g){
        super.paintComponent(g);

        if(i >= 0){
            Image img = imgs.get(i-1);
            Image img1 = img.getScaledInstance(100, 100, null);
        }

        g.drawImage(img1, 0, 0, null);
    }

}

You can't simply draw on a graphic and then hand it to a compoennt or so (I don't really understand what your given code should have done). Instead you have to overwrite the paintComponent method of a Component and put your custom drawing code in there.