java 资源浏览器的图形化组件
资源浏览器的图形化组件
FileList.java
import java.awt.*; import javax.swing.*; import javax.swing.event.*; public class FileList extends JList<Object> { class FileListModel implements ListModel<Object> { private FolderNode node; private final static char ALL = 'A'; char fileType = ALL; public void setNode(FolderNode node) { this.node = node; } public FolderNode getElementAt(int index) { if (node != null) return node.getChild(fileType, index); else return null; } public int getSize() { if (node != null) return node.getChildCount(fileType); else return 0; } public void addListDataListener(ListDataListener l) { } public void removeListDataListener(ListDataListener l) { } } class MyCellRenderer extends JLabel implements ListCellRenderer<Object> { private static final long serialVersionUID = 1L; 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; } } FileListModel dataModel; static final long serialVersionUID = 10; public FileList() { dataModel = new FileListModel(); setModel(dataModel); this.setCellRenderer(new MyCellRenderer()); } public void fireTreeSelectionChanged(FolderNode node) { dataModel.setNode(node); updateUI(); } } I_fileSystem.java
import javax.swing.*; public interface I_fileSystem { final public static char DIRECTORY = 'D'; final public static char FILE = 'F'; final public static char ALL = 'A'; public Icon getIcon(); public I_fileSystem getChild(char fileType, int index); public String getFullPath(); public int getChildCount(char fileType); public boolean isLeaf(char fileType); public int getIndexOfChild(char fileType, Object child); } FileTree.java
import java.awt.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.tree.*; public class FileTree extends JTree { class FolderRenderer extends DefaultTreeCellRenderer { private static final long serialVersionUID = 1L; public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) { I_fileSystem node = (I_fileSystem) value; Icon icon = node.getIcon(); setLeafIcon(icon); setOpenIcon(icon); setClosedIcon(icon); return super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); } } class FileSystemModel implements TreeModel { I_fileSystem theRoot; public FileSystemModel(I_fileSystem fs) { theRoot = fs; } public Object getRoot() { return theRoot; } public Object getChild(Object parent, int index) { return ((I_fileSystem) parent).getChild(I_fileSystem.DIRECTORY, index); } public int getChildCount(Object parent) { return ((I_fileSystem) parent).getChildCount(I_fileSystem.DIRECTORY); } public boolean isLeaf(Object node) { return ((I_fileSystem) node).isLeaf(I_fileSystem.DIRECTORY); } public int getIndexOfChild(Object parent, Object child) { return ((I_fileSystem) parent).getIndexOfChild(I_fileSystem.DIRECTORY, child); } public void valueForPathChanged(TreePath path, Object newValue) { } public void addTreeModelListener(TreeModelListener l) { } public void removeTreeModelListener(TreeModelListener l) { } } static final long serialVersionUID = 0; private FileList theList; public FileTree(FileList list) { theList = list; setModel(new FileSystemModel(new FolderNode())); this.setCellRenderer(new FolderRenderer()); addTreeSelectionListener(new TreeSelectionListener() { public void valueChanged(TreeSelectionEvent tse) { } }); this.setSelectionRow(0); } public void fireValueChanged(TreeSelectionEvent tse) { TreePath tp = tse.getNewLeadSelectionPath(); theList.fireTreeSelectionChanged((FolderNode) tp.getLastPathComponent()); } public void fireTreeCollapsed(TreePath path) { super.fireTreeCollapsed(path); TreePath curpath = getSelectionPath(); if (path.isDescendant(curpath)) setSelectionPath(path); } public void fireTreeWillExpand(TreePath path) { System.out.println("Path will expand is " + path); } public void fireTreeWillCollapse(TreePath path) { System.out.println("Path will collapse is " + path); } class ExpansionListener implements TreeExpansionListener { FileTree tree; public ExpansionListener(FileTree ft) { tree = ft; } public void treeCollapsed(TreeExpansionEvent tee) { } public void treeExpanded(TreeExpansionEvent tee) { } } } FolderNode.java
import java.io.*; import java.util.*; import javax.swing.*; import javax.swing.filechooser.*; /** * * A data model for a JTree. This model explorer windows file system directly. * * * * <p> * * Perhaps there is a fatal bug with this design. For speed, each of instances * * of this model contains file objects of subdirectory, up to now, there isn't * * any method to release them until program be end. I'm afraid that the memory * * would be full of if the file system is large enough and JVM memery size * * setted too small. * * * * <p> * * I won't pay more attention to solve it. it isn't goal of current a exercise. * * * * @author Jason */ public class FolderNode implements I_fileSystem { private static FileSystemView fsView; private static boolean showHiden = true;; private File theFile; private Vector<File> all = new Vector<File>(); private Vector<File> folder = new Vector<File>(); /** * * set that whether apply hiden file. * * * * @param ifshow */ public void setShowHiden(boolean ifshow) { showHiden = ifshow; } public Icon getIcon() { return fsView.getSystemIcon(theFile); } public String toString() { // return fsView. return fsView.getSystemDisplayName(theFile); } /** * * create a root node. by default, it should be the DeskTop in window file * * system. * * */ public FolderNode() { fsView = FileSystemView.getFileSystemView(); theFile = fsView.getHomeDirectory(); prepareChildren(); } private void prepareChildren() { File[] files = fsView.getFiles(theFile, showHiden); for (int i = 0; i < files.length; i++) { all.add(files[i]); if (files[i].isDirectory() && !files[i].toString().toLowerCase().endsWith(".lnk")) { folder.add(files[i]); } } } private FolderNode(File file) { theFile = file; prepareChildren(); } public FolderNode getChild(char fileType, int index) { if (I_fileSystem.DIRECTORY == fileType) { return new FolderNode(folder.get(index)); } else if (I_fileSystem.ALL == fileType) { return new FolderNode(all.get(index)); } else if (I_fileSystem.FILE == fileType) { return null; } else { return null; } } public int getChildCount(char fileType) { if (I_fileSystem.DIRECTORY == fileType) { return folder.size(); } else if (I_fileSystem.ALL == fileType) { return all.size(); } else if (I_fileSystem.FILE == fileType) { return -1; } else { return -1; } } public boolean isLeaf(char fileType) { if (I_fileSystem.DIRECTORY == fileType) { return folder.size() == 0; } else if (I_fileSystem.ALL == fileType) { return all.size() == 0; } else if (I_fileSystem.FILE == fileType) { return true; } else { return true; } } public int getIndexOfChild(char fileType, Object child) { if (child instanceof FolderNode) { if (I_fileSystem.DIRECTORY == fileType) { return folder.indexOf(((FolderNode) child).theFile); } else if (I_fileSystem.ALL == fileType) { return all.indexOf(((FolderNode) child).theFile); } else if (I_fileSystem.FILE == fileType) { return -1; } else { return -1; } } else { return -1; } } @Override public String getFullPath() { return theFile.getAbsolutePath(); } } JExplorer.java
import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.awt.datatransfer.*; public class JExplorer extends JFrame { private static final long serialVersionUID = 0l; private static final int LEFT_WIDTH = 200; private static final int RIGHT_WIDTH = 300; private static final int WINDOW_HEIGHT = 300; private JPopupMenu jmTree; private JPopupMenu jmList; private FileTree tree; private FileList list; public JExplorer() { super("资源浏览器"); setPreferredSize(new Dimension(800, 600)); setLayout(new BorderLayout()); list = new FileList(); tree = new FileTree(list); jmTree = new JPopupMenu(); JMenuItem jmiCopyPathName = new JMenuItem("复制目录全路径"); jmiCopyPathName.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { Clipboard clipboard = Toolkit.getDefaultToolkit() .getSystemClipboard(); Transferable tText = new StringSelection(((I_fileSystem) tree .getSelectionPath().getLastPathComponent()) .getFullPath()); clipboard.setContents(tText, null); } }); jmTree.add(jmiCopyPathName); tree.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getButton() == 3 && tree.getSelectionCount() > 0) jmTree.show(tree, e.getX(), e.getY()); } }); tree.setDoubleBuffered(true); jmList = new JPopupMenu(); JMenuItem jmiCopyFileName = new JMenuItem("复制文件系统对象全路径"); jmiCopyFileName.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { Clipboard clipboard = Toolkit.getDefaultToolkit() .getSystemClipboard(); Transferable tText = new StringSelection(((I_fileSystem)list.getSelectedValue()).getFullPath()); clipboard.setContents(tText, null); } }); jmList.add(jmiCopyFileName); list.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getButton() == 3 && tree.getSelectionCount() > 0) jmList.show(list, e.getX(), e.getY()); } }); list.setDoubleBuffered(true); JScrollPane treeView = new JScrollPane(tree); treeView.setPreferredSize(new Dimension(LEFT_WIDTH, WINDOW_HEIGHT)); JScrollPane listView = new JScrollPane(list); listView.setPreferredSize(new Dimension(RIGHT_WIDTH, WINDOW_HEIGHT)); JSplitPane pane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, treeView, listView); pane.setDividerLocation(300); pane.setDividerSize(4); add(pane); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); Dimension screen = Toolkit.getDefaultToolkit().getScreenSize(); int left = (screen.width - getWidth()) / 2; int top = (screen.height - getHeight()) / 2; setLocation(left, top); setVisible(true); } public static void main(String[] args) { new JExplorer(); } }