🚀 go-pugleaf

Hi,

I want to build an application for set of calculators, about 20, (i.e. 
formulas where the user enters value, click calculate, and get the answer).

My plan is to create a frame with a selection list to the left (in a 
JPanel) and a JPanel (cardlayout) to the right showing the formula 
selected in the list.

Having worked with JB and cardlayout, Design mode gets really slow when 
a lot of labels and fields are entered. So my thought was to create a 
class per formula and extend JPanel and the only code in "main" would be 
to show the right panel with

cardLayout1.show(jPanel2,"formula1Panel"); // jPanel2 is my cardlayout panel

It works to a part. I create my formula1 class and set the Layout to 
GridBagLayout. It all looks good in design.
In main (to test before I create my showRightFormula method) I try to 
just display the right panel with code as above, right after call to 
jbInit(). The panel shows empty.

When I in design mode for "main" set different Layout managers, they 
override my formula1-class layout and displays as it feels like.

What to do?

--- Code ---

// main
     JPanel jPanel1 = new JPanel(); // where to put list
     JScrollPane jScrollPane1 = new JScrollPane();
     JList calcSelectjList = new JList();
     GridBagLayout gridBagLayout1 = new GridBagLayout();
     JPanel jPanel2 = new JPanel(); // cardlayout panel
     CardLayout cardLayout1 = new CardLayout();
     formula1 ohmsLawPanel = new formula1();
     JPanel emptyPanel = new JPanel(); // to show when no selection

//cosntructor
         try {
             setDefaultCloseOperation(EXIT_ON_CLOSE);
             jbInit();
             calcSelectjList.setListData(calculators);
             cardLayout1.show(jPanel2,"ohmsLawPanel");
         } catch (Exception exception) {
             exception.printStackTrace();
         }

// my extended class

class fomula1 extends JPanel {

     JTextField jTextField1 = new JTextField();
     JLabel jLabel2 = new JLabel();
     JLabel jLabel3 = new JLabel();
     JButton jButton1 = new JButton();
     GridBagLayout gridBagLayout1 = new GridBagLayout();

     public formula1() {
         try {
             jbInit();
         } catch (Exception ex) {
             ex.printStackTrace();
         }
     }

     public void paintComponent(Graphics g) {
         super.paintComponent(g);
     }

     private void jbInit() throws Exception {
	...
         jLabel1.setFont(new java.awt.Font("Dialog", Font.PLAIN, 20));
         jLabel1.setText("=");
         jLabel2.setHorizontalAlignment(SwingConstants.CENTER);
         jLabel3.setText("*");

         jButton1.setMaximumSize(new Dimension(80, 30));
         jButton1.setMinimumSize(new Dimension(80, 30));
         jButton1.setPreferredSize(new Dimension(80, 30));

         jButton1.setText("Reset");
	...
         this.add(jButton1, new GridBagConstraints(3, 2, 2, 1, 0.0, 0.0
                          , GridBagConstraints.CENTER,
                          GridBagConstraints.NONE,
                          new Insets(13, 10, 18, 23), 20, 0));
     }