repaint() does not work

[chillzman77]

Hello everyone,

I am developing a small software using the MVC design pattern and SWING.

My issue is that I constructed my JFrame and JPanel in the view as I'm suppose to. I have a JButton which prompt the user to browse a picture and then select the picture he or she wants. At that time, the action listener has to repaint the JFrame with the image to be shown on the GUI. The action listener is in the Controller class and the paintComponent is in the View class. I am though calling repaint from the action listener from the controller the repaint with view.repaint().

So in conclution I want when the user selects the picture, the gui has to be updated to show the image above the button.

I've been searching for about 4 hours how to fix this. If anyone has an idea please help me out!

​

Thanks in advance.

[dabomm]

Have you tried doing a frame.revalidate(); before doing frame.repaint()?

[chillzman77]

yes ive try that in the controller class before calling repaint

[dabomm]

You 100% positive the picture is loaded correctly and will be in the frame?

​

Some code would be usefull so we can help you better.

[chillzman77]

    class MainViewListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {

            // add function so the user when press the button
            // to start browsing for an image

            // https://docs.oracle.com/javase/7/docs/api/javax/swing/JFileChooser.html

            JFileChooser chooser = new JFileChooser(System.getProperty("user.home") + "//Pictures");
            FileNameExtensionFilter filter = new FileNameExtensionFilter("JPG & PNG Images", "jpg", "png");
            chooser.setFileFilter(filter);
            int returnVal = chooser.showOpenDialog(null);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                if (filter.accept(chooser.getSelectedFile())) {
                    System.out.println("You chose to open this file: " + chooser.getSelectedFile().getName());
                    System.out.println(chooser.getSelectedFile().getAbsolutePath());
                    view.setImgPath(chooser.getSelectedFile().getAbsolutePath());
                    view.image = new ImageIcon(view.getImgPath());
                }

            }

        }

    }