Forgot to commit this

Author: rcx

src/main/java/club/bytecode/the/jda/gui/components/CheckboxList.java

@@ -0,0 +1,65 @@
+package club.bytecode.the.jda.gui.components;
+
+import javax.swing.*;
+import javax.swing.border.Border;
+import javax.swing.border.EmptyBorder;
+import java.awt.*;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+/**
+ * Copied from somewhere online.
+ */
+public class CheckboxList extends JList {
+    protected static Border noFocusBorder =
+            new EmptyBorder(1, 1, 1, 1);
+
+    public CheckboxList() {
+        setCellRenderer(new CellRenderer());
+
+        addMouseListener(new MouseAdapter() {
+            public void mousePressed(MouseEvent e) {
+                int index = locationToIndex(e.getPoint());
+
+                if (index != -1) {
+                    JCheckBox checkbox = (JCheckBox)
+                            getModel().getElementAt(index);
+                    checkbox.setSelected(
+                            !checkbox.isSelected());
+                    repaint();
+                }
+            }
+        });
+        setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+    }
+
+    protected class CellRenderer implements ListCellRenderer {
+        public Component getListCellRendererComponent(
+                JList list, Object value, int index,
+                boolean isSelected, boolean cellHasFocus) {
+            JCheckBox checkbox = (JCheckBox) value;
+            checkbox.setBackground(isSelected ?
+                    getSelectionBackground() : getBackground());
+            checkbox.setForeground(isSelected ?
+                    getSelectionForeground() : getForeground());
+            checkbox.setEnabled(isEnabled());
+            checkbox.setFont(getFont());
+            checkbox.setFocusPainted(false);
+            checkbox.setBorderPainted(true);
+            checkbox.setBorder(isSelected ?
+                    UIManager.getBorder(
+                            "List.focusCellHighlightBorder") : noFocusBorder);
+            return checkbox;
+        }
+    }
+    
+    public void addCheckbox(JCheckBox checkBox) {
+        ListModel currentList = this.getModel();
+        JCheckBox[] newList = new JCheckBox[currentList.getSize() + 1];
+        for (int i = 0; i < currentList.getSize(); i++) {
+            newList[i] = (JCheckBox) currentList.getElementAt(i);
+        }
+        newList[newList.length - 1] = checkBox;
+        setListData(newList);
+    }
+}