可滚动的JPanel

Question

如何使JPanel可滚动？当我将它添加到包含面板时,我实现了可滚动界面

tabbedPane.add("Editor", new JScrollPane(storeyEditor = new MNScrollablePanel()));

什么都行不通

码:

public class MNScrollablePanel extends JPanel implements Scrollable {

    public Dimension getPreferredScrollableViewportSize() {
        return getPreferredSize();
    }

    public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
        return 10;
    }

    public boolean getScrollableTracksViewportHeight() {
        return false;
    }

    public boolean getScrollableTracksViewportWidth() {
        return false;
    }

    public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
        return 10;
    }
}

Answer 1

它和我一起工作....

JPanel test = new JPanel();
test.setPreferredSize(new Dimension( 2000,2000));
JScrollPane scrollFrame = new JScrollPane(test);
test.setAutoscrolls(true);
scrollFrame.setPreferredSize(new Dimension( 800,300));
this.add(scrollFrame);

Answer 2

你必须使用JScrollPane.然后打电话给setViewportview(Component);

您不必实现可滚动,JPanel已经可以滚动