filelist.java

用ｊａｖａ实现的模拟ｗｉｎｄｏｗｓ资源管理器．可以随便访问计算机中的众多资源．

import java.awt.Color;

import java.awt.Component;

 

import javax.swing.JLabel;

import javax.swing.JList;

import javax.swing.ListCellRenderer;

import javax.swing.ListModel;

import javax.swing.event.ListDataListener;

 

public class FileList

extends JList{

    //PathNode theNode;

    FileListModel dataModel;

    static final long serialVersionUID = 10;

 

    public FileList() {

        dataModel = new FileListModel();

        setModel(dataModel);

        this.setCellRenderer(new MyCellRenderer());

    }

    

    public void fireTreeSelectionChanged(I_fileSystem node) {

        //Vector files = node.getFiles();

        //theNode = node;

        dataModel.setNode(node);

        updateUI();

    }

}

 

class FileListModel

implements ListModel {

    FileList theList;

    I_fileSystem node;

    char fileType = I_fileSystem.ALL;

 

    public void setNode (I_fileSystem node) {

        this.node = node;

    }

 

    public Object getElementAt(int index) {

       if (node != null) {

           return ((I_fileSystem)node).getChild(fileType, index);

       } else {

           return null;

       }

    }

 

    public int getSize() {

       if (node != null) {

           return ((I_fileSystem)node).getChildCount(fileType);

       } else {

           return 0;

       }       

    }

    

    public void addListDataListener(ListDataListener l) {

    }

    public void removeListDataListener(ListDataListener l) {

    }

}

 

class MyCellRenderer extends JLabel implements ListCellRenderer {

    public MyCellRenderer() {

        setOpaque(true);

    }

    public Component getListCellRendererComponent(

        JList list,

        Object value,

        int index,

        boolean isSelected,

        boolean cellHasFocus)

    {

        FolderNode node = (FolderNode)value;

        setIcon(node.getIcon());

        setText(value.toString());

        setBackground(isSelected ? Color.BLUE.darker().darker(): Color.WHITE);

        setForeground(isSelected ? Color.WHITE : Color.BLACK);

        return this;

    }

}