package javax.swing.plaf.basic; import javax.swing.plaf.*; import javax.swing.*; import java.awt.*; public class BasicScrollPaneUI extends ScrollPaneUI { int min_w = 50; int min_h = 50; public static ComponentUI createUI(final JComponent c) { return new BasicScrollPaneUI(); } public void installUI(final JComponent c) { super.installUI(c); } public Dimension getPreferredSize(JComponent c) { JScrollPane p = (JScrollPane ) c; Dimension d = new Dimension(min_w, min_h); Dimension a = p.getViewport().getPreferredSize(); if (a != null) { d.width = Math.max(d.width, a.width); d.height = Math.max(d.height, a.height); } System.out.println("BasicScrollPaneUI->preff->"+d); return d; } void paint(Graphics g, JComponent c) { System.out.println("BasicScrollPaneUI->paint()->"+c); JScrollPane p = (JScrollPane ) c; p.getViewport().paint(g); } }