Section 17.11. The JSplitPane Class


17.11. The JSplitPane Class

A split pane is a special container that holds two components, each in its own sub-pane. A splitter bar adjusts the sizes of the two subpanes. In a document viewer, for example, you might use a split pane to show a table of contents next to a page of text.

The following example uses two JLabels containing ImageIcons, like the previous example. It displays the two labels, wrapped in JScrollPanes, on either side of a JSplitPane (see Figure 17-10). You can drag the splitter bar back and forth to adjust the sizes of the two contained components.

     //file: SplitPaneFrame.java     import java.awt.*;     import java.awt.event.*;     import javax.swing.*;     import javax.swing.border.*;     public class SplitPaneFrame {       public static void main(String[] args) {         String fileOne = "Piazza di Spagna.jpg";         String fileTwo = "L1-Light.jpg";         if (args.length > 0) fileOne = args[0];         if (args.length > 1) fileTwo = args[1];         JFrame frame = new JFrame("SplitPaneFrame");         JLabel leftImage = new JLabel( new ImageIcon( fileOne ) );         Component left = new JScrollPane(leftImage);         JLabel rightImage = new JLabel( new ImageIcon( fileTwo ) );         Component right = new JScrollPane(rightImage);         JSplitPane split =           new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, left, right);         split.setDividerLocation(100);         frame.getContentPane(  ).add(split);         frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );         frame.setSize(300, 200);         frame.setVisible(true);       }     }

Figure 17-10. Using a split pane




    Learning Java
    Learning Java
    ISBN: 0596008732
    EAN: 2147483647
    Year: 2005
    Pages: 262

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