Added 'design' functionality

src/main/java/org/openautonomousconnection/oacswing/component/OACRootPane.java

@@ -0,0 +1,129 @@
+/* Author: Maple
+ *  Feb. 2 2026
+ *  */
+
+package org.openautonomousconnection.oacswing.component;
+
+import org.jetbrains.annotations.NotNull;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class OACRootPane extends JRootPane implements OACComponent {
+    public OACRootPane() {
+        super();
+    }
+
+    @Override
+    protected OACLayeredPane createLayeredPane() {
+        OACLayeredPane p = new OACLayeredPane();
+        p.setName(this.getName()+".layeredPane");
+        return p;
+    }
+
+    @Override
+    protected Container createContentPane() {
+        JComponent c = new OACPanel();
+        c.setName(this.getName()+".contentPane");
+        c.setLayout(new BorderLayout() {
+            /* This BorderLayout subclass maps a null constraint to CENTER.
+             * Although the reference BorderLayout also does this, some VMs
+             * throw an IllegalArgumentException.
+             */
+            public void addLayoutComponent(Component comp, Object constraints) {
+                if (constraints == null) {
+                    constraints = BorderLayout.CENTER;
+                }
+                super.addLayoutComponent(comp, constraints);
+            }
+        });
+        return c;
+    }
+
+//    public void setOACMenuBar(OACMenuBar menu) {
+//        super.setJMenuBar(menu);
+//    }
+
+    @Deprecated
+    @Override
+    public JMenuBar getJMenuBar() {
+        if(this.menuBar instanceof OACMenuBar oacMenuBar)
+            return oacMenuBar;
+        else
+            return this.menuBar;
+    }
+
+    public OACMenuBar getOACMenuBar() {
+        return (OACMenuBar) this.menuBar;
+    }
+
+    @Deprecated
+    @Override
+    public void setLayeredPane(JLayeredPane layered) {
+        if(layered instanceof OACLayeredPane)
+            super.setLayeredPane(layered);
+    }
+
+    public void setLayeredPane(OACLayeredPane layeredPane) {
+        super.setLayeredPane(layeredPane);
+    }
+
+    @Deprecated
+    @Override
+    public void setDefaultButton(JButton defaultButton) {
+        if(defaultButton instanceof OACButton)
+            super.setDefaultButton(defaultButton);
+    }
+
+    public void setDefaultButton(OACButton defaultButton) {
+        super.setDefaultButton(defaultButton);
+    }
+
+    @Override
+    public OACButton getDefaultButton() {
+        return (OACButton) this.defaultButton;
+    }
+
+
+    @Override
+    public OACLayeredPane getLayeredPane() { return (OACLayeredPane) this.layeredPane; }
+
+    @Override
+    protected Component createGlassPane() {
+        OACPanel c = new OACPanel();
+        c.setName(this.getName()+".glassPane");
+        c.setVisible(false);
+        c.setOpaque(false);
+        return c;
+    }
+
+    @Override
+    public Component add(Component comp) {
+        this.initOther(comp);
+        return super.add(comp);
+    }
+
+    @Override
+    public Component add(Component comp, int index) {
+        this.initOther(comp);
+        return super.add(comp, index);
+    }
+
+    @Override
+    public void add(@NotNull Component comp, Object constraints) {
+        this.initOther(comp);
+        super.add(comp, constraints);
+    }
+
+    @Override
+    public Component add(String name, Component comp) {
+        this.initOther(comp);
+        return super.add(name, comp);
+    }
+
+    @Override
+    public void add(Component comp, Object constraints, int index) {
+        this.initOther(comp);
+        super.add(comp, constraints, index);
+    }
+}