basicfilechooserui.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

		TransferHandler th2 = list.getTransferHandler();
		if (th1 != th2) {
		    list.setTransferHandler(th1);
		}
		if (getFileChooser().getDragEnabled() != list.getDragEnabled()) {
		    list.setDragEnabled(getFileChooser().getDragEnabled());
		}
	    }
        }

        public void mouseExited(MouseEvent evt) {
        }

        public void mousePressed(MouseEvent evt) {
        }

        public void mouseReleased(MouseEvent evt) {
        }

	public void valueChanged(ListSelectionEvent evt) {
	    if(!evt.getValueIsAdjusting()) {
		JFileChooser chooser = getFileChooser();
		FileSystemView fsv = chooser.getFileSystemView();
		JList list = (JList)evt.getSource();

		int fsm = chooser.getFileSelectionMode();
		boolean useSetDirectory = usesSingleFilePane && 
                                          (fsm == JFileChooser.FILES_ONLY);

		if (chooser.isMultiSelectionEnabled()) {
		    File[] files = null;
		    Object[] objects = list.getSelectedValues();
		    if (objects != null) {
			if (objects.length == 1
			    && ((File)objects[0]).isDirectory()
			    && chooser.isTraversable(((File)objects[0]))
			    && (useSetDirectory || !fsv.isFileSystem(((File)objects[0])))) {
			    setDirectorySelected(true);
			    setDirectory(((File)objects[0]));
			} else {
			    ArrayList fList = new ArrayList(objects.length);
			    for (int i = 0; i < objects.length; i++) {
				File f = (File)objects[i];
				boolean isDir = f.isDirectory();
				if ((chooser.isFileSelectionEnabled() && !isDir)
				    || (chooser.isDirectorySelectionEnabled()
					&& fsv.isFileSystem(f)
					&& isDir)) {
				    fList.add(f);
				}
			    }
			    if (fList.size() > 0) {
				files = (File[])fList.toArray(new File[fList.size()]);
			    }
			    setDirectorySelected(false);
			}
		    }
		    chooser.setSelectedFiles(files);
		} else {
		    File file = (File)list.getSelectedValue();
		    if (file != null
			&& file.isDirectory()
			&& chooser.isTraversable(file)
			&& (useSetDirectory || !fsv.isFileSystem(file))) {

			setDirectorySelected(true);
			setDirectory(file);
			if (usesSingleFilePane) {
			    chooser.setSelectedFile(null);
			}
		    } else {
			setDirectorySelected(false);
			if (file != null) {
			    chooser.setSelectedFile(file);
			}
		    }
		}
	    }
        }
    }

    protected class DoubleClickListener extends MouseAdapter {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
	Handler handler;
	public  DoubleClickListener(JList list) {
	    handler = new Handler(list);
	}

	/**
	 * The JList used for representing the files is created by subclasses, but the
	 * selection is monitored in this class.  The TransferHandler installed in the
	 * JFileChooser is also installed in the file list as it is used as the actual
	 * transfer source.  The list is updated on a mouse enter to reflect the current
	 * data transfer state of the file chooser.
	 */
        public void mouseEntered(MouseEvent e) {
            handler.mouseEntered(e);
	}

	public void mouseClicked(MouseEvent e) {
            handler.mouseClicked(e);
	}
    }

    protected class SelectionListener implements ListSelectionListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
	public void valueChanged(ListSelectionEvent e) {
            getHandler().valueChanged(e);
	}
    }

    /**
     * Property to remember whether a directory is currently selected in the UI.
     *
     * @return <code>true</code> iff a directory is currently selected.
     * @since 1.4
     */
    protected boolean isDirectorySelected() {
	return directorySelected;
    }

    /**
     * Property to remember whether a directory is currently selected in the UI.
     * This is normally called by the UI on a selection event.
     *
     * @param b iff a directory is currently selected.
     * @since 1.4
     */
    protected void setDirectorySelected(boolean b) {
	directorySelected = b;
    }

    /**
     * Property to remember the directory that is currently selected in the UI.
     *
     * @return the value of the <code>directory</code> property
     * @see #setDirectory
     * @since 1.4
     */
    protected File getDirectory() {
	return directory;
    }

    /**
     * Property to remember the directory that is currently selected in the UI.
     * This is normally called by the UI on a selection event.
     *
     * @param f the <code>File</code> object representing the directory that is
     *		currently selected
     * @since 1.4
     */
    protected void setDirectory(File f) {
	directory = f;
    }

    /**
     * Returns the mnemonic for the given key.
     */
    private int getMnemonic(String key, Locale l) {
        return SwingUtilities2.getUIDefaultsInt(key, l);
    }

    // *******************************************************
    // ************ FileChooser UI PLAF methods **************
    // *******************************************************

    /**
     * Returns the default accept all file filter
     */
    public FileFilter getAcceptAllFileFilter(JFileChooser fc) {
	return acceptAllFileFilter;
    }


    public FileView getFileView(JFileChooser fc) {
	return fileView;
    }


    /**
     * Returns the title of this dialog
     */
    public String getDialogTitle(JFileChooser fc) {
	String dialogTitle = fc.getDialogTitle();
	if (dialogTitle != null) {
	    return dialogTitle;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openDialogTitleText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveDialogTitleText;
	} else {
	    return getApproveButtonText(fc);
	}
    }


    public int getApproveButtonMnemonic(JFileChooser fc) {
	int mnemonic = fc.getApproveButtonMnemonic();
	if (mnemonic > 0) {
	    return mnemonic;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openButtonMnemonic;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveButtonMnemonic;
	} else {
	    return mnemonic;
	}
    }

    public String getApproveButtonText(JFileChooser fc) {
	String buttonText = fc.getApproveButtonText();
	if (buttonText != null) {
	    return buttonText;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	    return openButtonText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    return saveButtonText;
	} else {
	    return null;
	}
    }


    // *****************************
    // ***** Directory Actions *****
    // *****************************

    public Action getNewFolderAction() {
	if (newFolderAction == null) {
	    newFolderAction = new NewFolderAction();
	    // Note: Don't return null for readOnly, it might
	    // break older apps.
	    if (readOnly) {
		newFolderAction.setEnabled(false);
	    }
	}
	return newFolderAction;
    }

    public Action getGoHomeAction() {
	return goHomeAction;
    }

    public Action getChangeToParentDirectoryAction() {
	return changeToParentDirectoryAction;
    }

    public Action getApproveSelectionAction() {
	return approveSelectionAction;
    }

    public Action getCancelSelectionAction() {
	return cancelSelectionAction;
    }

    public Action getUpdateAction() {
	return updateAction;
    }


    /**
     * Creates a new folder.
     */
    protected class NewFolderAction extends AbstractAction {
	protected NewFolderAction() {
	    super(FilePane.ACTION_NEW_FOLDER);
	}
	public void actionPerformed(ActionEvent e) {
	    if (readOnly) {
		return;
	    }
	    JFileChooser fc = getFileChooser();
	    File currentDirectory = fc.getCurrentDirectory();
	    File newFolder = null;
	    try {
		newFolder = fc.getFileSystemView().createNewFolder(currentDirectory);
		if (fc.isMultiSelectionEnabled()) {
		    fc.setSelectedFiles(new File[] { newFolder });
		} else {
		    fc.setSelectedFile(newFolder);
		}
	    } catch (IOException exc) {
		JOptionPane.showMessageDialog(
		    fc,
		    newFolderErrorText + newFolderErrorSeparator + exc,
		    newFolderErrorText, JOptionPane.ERROR_MESSAGE);
		return;
	    } 

	    fc.rescanCurrentDirectory();
	}
    }

    /**
     * Acts on the "home" key event or equivalent event.
     */
    protected class GoHomeAction extends AbstractAction {
	protected GoHomeAction() {
	    super("Go Home");
	}
	public void actionPerformed(ActionEvent e) {
	    JFileChooser fc = getFileChooser();
	    changeDirectory(fc.getFileSystemView().getHomeDirectory());
	}
    }

    protected class ChangeToParentDirectoryAction extends AbstractAction {
	protected ChangeToParentDirectoryAction() {
	    super("Go Up");
	    putValue(Action.ACTION_COMMAND_KEY, FilePane.ACTION_CHANGE_TO_PARENT_DIRECTORY);
	}
	public void actionPerformed(ActionEvent e) {
	    Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
	    if (focusOwner == null || !(focusOwner instanceof javax.swing.text.JTextComponent)) {
		getFileChooser().changeToParentDirectory();
	    }
	}
    }

    /**
     * Responds to an Open or Save request
     */
    protected class ApproveSelectionAction extends AbstractAction {
	protected ApproveSelectionAction() {
	    super(FilePane.ACTION_APPROVE_SELECTION);
	}
	public void actionPerformed(ActionEvent e) {
	    if (isDirectorySelected()) {
		File dir = getDirectory();
		if (dir != null) {
		    try {
			// Strip trailing ".."
			dir = ShellFolder.getNormalizedFile(dir);
		    } catch (IOException ex) {
			// Ok, use f as is
		    }
		    changeDirectory(dir);
		    return;
		}
	    }

	    JFileChooser chooser = getFileChooser();

	    String filename = getFileName();
	    FileSystemView fs = chooser.getFileSystemView();
	    File dir = chooser.getCurrentDirectory();

	    if (filename != null) {
		// Remove whitespace from beginning and end of filename
		filename = filename.trim();
	    }

	    if (filename == null || filename.equals("")) {
		// no file selected, multiple selection off, therefore cancel the approve action
		resetGlobFilter();
		return;
	    }

	    File selectedFile = null;
	    File[] selectedFiles = null;

	    if (filename != null && !filename.equals("")) {
		// Unix: Resolve '~' to user's home directory
		if (File.separatorChar == '/') {
		    if (filename.startsWith("~/")) {
			filename = System.getProperty("user.home") + filename.substring(1);
		    } else if (filename.equals("~")) {
			filename = System.getProperty("user.home");
		    }
		}

		if (chooser.isMultiSelectionEnabled() && filename.startsWith("\"")) {
		    ArrayList fList = new ArrayList();

		    filename = filename.substring(1);
		    if (filename.endsWith("\"")) {
			filename = filename.substring(0, filename.length()-1);
		    }
		    File[] children = null;
		    int childIndex = 0;
		    do {
			String str;
			int i = filename.indexOf("\" \"");
			if (i > 0) {
			    str = filename.substring(0, i);
			    filename = filename.substring(i+3);
			} else {
			    str = filename;
			    filename = "";
			}
			File file = fs.createFileObject(str);
			if (!file.isAbsolute()) {
			    if (children == null) {
				children = fs.getFiles(dir, false);
				Arrays.sort(children);
			    }
			    for (int k = 0; k < children.length; k++) {
				int l = (childIndex + k) % children.length;
				if (children[l].getName().equals(str)) {
				    file = children[l];
				    childIndex = l + 1;
				    break;
				}
			    }
			}
			fList.add(file);
		    } while (filename.length() > 0);
		    if (fList.size() > 0) {
			selectedFiles = (File[])fList.toArray(new File[fList.size()]);
		    }
		    resetGlobFilter();
		} else {
		    selectedFile = fs.createFileObject(filename);
		    if(!selectedFile.isAbsolute()) {
		       selectedFile = fs.getChild(dir, filename);
		    }
		    // check for wildcard pattern
		    FileFilter currentFilter = chooser.getFileFilter();
		    if (!selectedFile.exists() && isGlobPattern(filename)) {
			if (globFilter == null) {
			    globFilter = new GlobFilter();
			}
			try {
			    globFilter.setPattern(filename);
			    if (!(currentFilter instanceof GlobFilter)) {
				actualFileFilter = currentFilter;
			    }
			    chooser.setFileFilter(null);
			    chooser.setFileFilter(globFilter);
			    return;
			} catch (PatternSyntaxException pse) {
			    // Not a valid glob pattern. Abandon filter.
			}