VerticallyScrollablePanel.java

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.widgets;

import java.awt.Dimension;
import java.awt.LayoutManager;
import java.awt.Rectangle;

import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.Scrollable;

public class VerticallyScrollablePanel extends JPanel implements Scrollable {

    static public JScrollPane embed(VerticallyScrollablePanel panel) {
        JScrollPane sp = new JScrollPane(panel);
        sp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
        return sp;
    }

    public VerticallyScrollablePanel() {
        super();
    }

    public VerticallyScrollablePanel(boolean isDoubleBuffered) {
        super(isDoubleBuffered);
    }

    public VerticallyScrollablePanel(LayoutManager layout, boolean isDoubleBuffered) {
        super(layout, isDoubleBuffered);
    }

    public VerticallyScrollablePanel(LayoutManager layout) {
        super(layout);
    }

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

    public int getScrollableBlockIncrement(Rectangle arg0, int arg1, int arg2) {
        return 20;
    }

    public boolean getScrollableTracksViewportHeight() {
        return false;
    }

    public boolean getScrollableTracksViewportWidth() {
        return true;
    }

    public int getScrollableUnitIncrement(Rectangle arg0, int arg1, int arg2) {
        return 10;
    }
}