Basic functionality for Add/Remove object instances to the list

src/main/java/eva2/gui/ObjectArrayEditor.java

@@ -0,0 +1,110 @@
+package eva2.gui;
+
+import eva2.problems.AbstractProblemDouble;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * Created by fabian on 16/12/15.
+ */
+public class ObjectArrayEditor<T> extends JPanel {
+    private JList<T> objectList;
+    private DefaultListModel<T> listModel;
+
+    public ObjectArrayEditor(Class<T> type) {
+        listModel = new DefaultListModel<>();
+
+        setLayout(new GridBagLayout());
+        GridBagConstraints c = new GridBagConstraints();
+        c.gridwidth = 2;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        c.weightx = 1.0;
+        c.weighty = 0.0;
+        c.gridx = 0;
+        c.gridy = 0;
+
+        TypeSelector typeSelector = new TypeSelector();
+        typeSelector.updateClassType(type.getName());
+
+        setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
+        add(typeSelector, c);
+
+        JButton addButton = new JButton("Add");
+        c.gridwidth = 1;
+        c.gridx = 2;
+        c.gridy = 0;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        c.weightx = 1.0;
+        c.weighty = 0.0;
+        add(addButton, c);
+
+        JButton removeButton = new JButton("Remove");
+        c.gridx = 2;
+        c.gridy = 1;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        c.weightx = 1.0;
+        c.weighty = 0.0;
+        add(removeButton, c);
+
+        JButton button;
+        button = new JButton("Config");
+        c.gridx = 2;
+        c.gridy = 2;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        c.weightx = 1.0;
+        c.weighty = 0.0;
+
+        add(button, c);
+
+        objectList = new JList<>(listModel);
+        objectList.setVisibleRowCount(10);
+        //objectList.setFixedCellHeight(15);
+        //objectList.setFixedCellWidth(100);
+
+        c.gridwidth = 2;
+        c.gridheight = 5;
+        c.gridx = 0;
+        c.gridy = 1;
+        c.fill = GridBagConstraints.BOTH;
+        c.weightx = 1.0;
+        c.weighty = 1.0;
+
+        JScrollPane scrollPane = new JScrollPane(objectList);
+        add(scrollPane, c);
+
+        addButton.addActionListener(event -> {
+            String className = ((Item) typeSelector.getSelectedItem()).getId();
+            try {
+                T n = (T) Class.forName(className).newInstance();
+                listModel.addElement(n);
+            } catch (Exception ex) {
+                System.err.println("Exception in itemStateChanged " + ex.getMessage());
+                System.err.println("Classpath is " + System.getProperty("java.class.path"));
+                ex.printStackTrace();
+
+                JOptionPane.showMessageDialog(this,
+                        "Could not create an example of\n"
+                                + className + "\n"
+                                + "from the current classpath. Is the resource folder at the right place?\nIs the class abstract or the default constructor missing?",
+                        "GenericObjectEditor",
+                        JOptionPane.ERROR_MESSAGE);
+            }
+        });
+
+        removeButton.addActionListener(event -> {
+            if (!objectList.isSelectionEmpty()) {
+                listModel.remove(objectList.getSelectedIndex());
+            }
+        });
+
+    }
+
+    public static void main(String[] args) {
+        JFrame frame = new JFrame("ObjectArrayEditor");
+        frame.add(new ObjectArrayEditor<>(AbstractProblemDouble.class), BorderLayout.CENTER);
+        frame.setVisible(true);
+        frame.pack();
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    }
+}