JScrollPane: Button Corner Sample

  
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;

public class ButtonCornerSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Cornering Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Icon acrossLogo = new ImageIcon("logo-across.jpg");
    Icon downLogo = new ImageIcon("logo-down.jpg");
    Icon bookCover = new ImageIcon("puzzlebook.jpg");
    JLabel columnLabel = new JLabel(acrossLogo);
    JLabel rowLabel = new JLabel(downLogo);
    JLabel coverLabel = new JLabel(bookCover);
    JButton button = new JButton("+");
    button.setFont(new Font("Monospaced", Font.PLAIN, 8));
    JScrollPane scrollPane = new JScrollPane(coverLabel);
    scrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER, button);
    scrollPane.setColumnHeaderView(columnLabel);
    scrollPane.setRowHeaderView(rowLabel);

    ActionListener actionListener = new JScrollPaneToTopAction(scrollPane);
    button.addActionListener(actionListener);

    frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

class JScrollPaneToTopAction implements ActionListener {
  JScrollPane scrollPane;

  public JScrollPaneToTopAction(JScrollPane scrollPane) {
    if (scrollPane == null) {
      throw new IllegalArgumentException(
          "JScrollPaneToTopAction: null JScrollPane");
    }
    this.scrollPane = scrollPane;
  }

  public void actionPerformed(ActionEvent actionEvent) {
    JScrollBar verticalScrollBar = scrollPane.getVerticalScrollBar();
    JScrollBar horizontalScrollBar = scrollPane.getHorizontalScrollBar();
    verticalScrollBar.setValue(verticalScrollBar.getMinimum());
    horizontalScrollBar.setValue(horizontalScrollBar.getMinimum());
  }
}

1.	Accessible Scroll Demo
2.	A quick demonstration of JScrollBar both vertical and horizontal
3.	JScrollPane Corner
4.	Expandable SplitPane
5.	ScrollBar Pieces
6.	Listening for Scrollbar Value Changes in a JScrollPane Container
7.	Get the default scrollbar policy
8.	Make the scrollbars always appear
9.	Make the scrollbars never appear
10.	JScrollBar and Adjustment event
11.	JScrollPane to hold scrollable component
12.	Use Adjustment Events in Swing
13.	Always display scrollbar
14.	How to use scrollbar and react to its action

JScrollPane: Button Corner Sample : ScrollBar « Swing JFC « Java

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