filesystemtreescrollpane.java

java写的图片浏览器,类似acds

package org.net9.oops.jsee;
import javax.swing.*;
import javax.swing.tree.*;
//import javax.swing.table.*;
import java.io.*;
import java.awt.*;


public class FileSystemTreeScrollPane extends JScrollPane {
    private JTree tree;
    ImageIcon diskIcon = new ImageIcon(getClass().getResource("/org/net9/oops/jsee/image/diskIcon.gif"));
    ImageIcon diskOnIcon = new ImageIcon(getClass().getResource("/org/net9/oops/jsee/image/diskOnIcon.gif"));
    ImageIcon expandIcon = new ImageIcon(getClass().getResource("/org/net9/oops/jsee/image/expand.gif"));
    ImageIcon dirIcon = new ImageIcon(getClass().getResource("/org/net9/oops/jsee/image/dirIcon.gif"));
    ImageIcon selectedIcon = new ImageIcon(getClass().getResource("/org/net9/oops/jsee/image/selected.gif"));

  public class FolderTreeCellRenderer extends JLabel implements TreeCellRenderer {
//    protected boolean selected;
    public Component getTreeCellRendererComponent(JTree tree, Object value,
					  boolean selected, boolean expanded,
					  boolean leaf, int row,
            boolean hasFocus) {

        Font font;
        String s = value.toString(); /* = tree.convertValueToText( value, selected,
                                      expanded, leaf, row, hasFocus);*/

        String osName = System.getProperty("os.name",".");
        if ( !s.endsWith(":\\") ) // if this is not a drive
        {
            if ( osName.startsWith("Windows") )
                s = s.substring(s.lastIndexOf("\\") + 1);
            else if ( !s.equals("/") )// hopefully Unix
                s = s.substring(s.lastIndexOf("/") + 1);
        }
        setIcon(diskIcon);

	      /* Set the text. */
	      setText(s);

        if (expanded)
          if (s.endsWith(":\\"))
            if (!selected)
              setIcon(diskIcon);
            else
              setIcon(diskOnIcon);
          else if (!selected)
	          setIcon(expandIcon);
          else
            setIcon(selectedIcon);
	      else if (selected)
          if (s.endsWith(":\\"))
            setIcon(diskOnIcon);
          else
	          setIcon(selectedIcon);
        else if (s.endsWith(":\\"))
            setIcon(diskIcon);
        else
            setIcon(dirIcon);

        return this;
    }
  }

    public FileSystemTreeScrollPane() {
        this( new FileSystemModel() );
    }

    public FileSystemTreeScrollPane( String startPath ) {
        this( new FileSystemModel( startPath ) );
    }

    public FileSystemTreeScrollPane( FileSystemModel model ) {
        tree = new JTree( model ) {
            public String convertValueToText(Object value, boolean selected,
                                             boolean expanded, boolean leaf, int row,
                                             boolean hasFocus) {
                return ((File)value).getName();
            }
        };

        tree.setCellRenderer(new FolderTreeCellRenderer());
        // check operating system
        String osName = System.getProperty("os.name",".");
        if ( osName.startsWith("Windows") ) /* Win32 */
            tree.setRootVisible( false );
        else // hopefully Unix for the moment
            tree.setRootVisible( true );

        tree.setEditable(false);
        tree.setShowsRootHandles( true );
        tree.putClientProperty( "JTree.lineStyle", "Angled" );

        getViewport().setView(tree);
    }

    public JTree getTree() {
       return tree;
    }

    public void setSelectionPath(File path) {
        File temp;
        temp = path;
        int count = 1;
        while (path.getParentFile() != null) {
            count++;
            path = path.getParentFile();
        }
        String osName = System.getProperty("os.name",".");
        if (osName.startsWith("Windows")) {
            File[] fpath = new File[count + 1];
            fpath[0] = new File("/");
            fpath[count] = temp;
            for (int i = count-1; i > 0; i--) {
                fpath[i] = fpath[i+1].getParentFile();
            }
            tree.setSelectionPath(new TreePath(fpath));
        } else // Unix
        {
            File[] fpath = new File[count];
            fpath[count-1] = temp;
            for (int i = count-2; i >= 0; i--) {
                fpath[i] = fpath[i+1].getParentFile();
            }
            tree.setSelectionPath(new TreePath(fpath));
        }
    }

    public TreePath getSelectionPath() {
        return tree.getSelectionPath();
    }
}