/*
* @(#)JFileChooser.java 1.106 04/06/28
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing;
import javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.plaf.FileChooserUI;
import javax.accessibility.*;
import java.io.File;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.util.Vector;
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Container;
import java.awt.BorderLayout;
import java.awt.Window;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.*;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.lang.ref.WeakReference;
/**
* JFileChooser
provides a simple mechanism for the user to
* choose a file.
* For information about using JFileChooser
, see
* How to Use File Choosers,
* a section in The Java Tutorial.
*
*
* * The following code pops up a file chooser for the user's home directory that * sees only .jpg and .gif images: *
* JFileChooser chooser = new JFileChooser(); * // Note: source for ExampleFileFilter can be found in FileChooserDemo, * // under the demo/jfc directory in the JDK. * ExampleFileFilter filter = new ExampleFileFilter(); * filter.addExtension("jpg"); * filter.addExtension("gif"); * filter.setDescription("JPG & GIF Images"); * chooser.setFileFilter(filter); * int returnVal = chooser.showOpenDialog(parent); * if(returnVal == JFileChooser.APPROVE_OPTION) { * System.out.println("You chose to open this file: " + * chooser.getSelectedFile().getName()); * } ** * @beaninfo * attribute: isContainer false * description: A component which allows for the interactive selection of a file. * * @version 1.106 06/28/04 * @author Jeff Dinkins * */ public class JFileChooser extends JComponent implements Accessible { /** * @see #getUIClassID * @see #readObject */ private static final String uiClassID = "FileChooserUI"; // ************************ // ***** Dialog Types ***** // ************************ /** * Type value indicating that the
JFileChooser
supports an
* "Open" file operation.
*/
public static final int OPEN_DIALOG = 0;
/**
* Type value indicating that the JFileChooser
supports a
* "Save" file operation.
*/
public static final int SAVE_DIALOG = 1;
/**
* Type value indicating that the JFileChooser
supports a
* developer-specified file operation.
*/
public static final int CUSTOM_DIALOG = 2;
// ********************************
// ***** Dialog Return Values *****
// ********************************
/**
* Return value if cancel is chosen.
*/
public static final int CANCEL_OPTION = 1;
/**
* Return value if approve (yes, ok) is chosen.
*/
public static final int APPROVE_OPTION = 0;
/**
* Return value if an error occured.
*/
public static final int ERROR_OPTION = -1;
// **********************************
// ***** JFileChooser properties *****
// **********************************
/** Instruction to display only files. */
public static final int FILES_ONLY = 0;
/** Instruction to display only directories. */
public static final int DIRECTORIES_ONLY = 1;
/** Instruction to display both files and directories. */
public static final int FILES_AND_DIRECTORIES = 2;
/** Instruction to cancel the current selection. */
public static final String CANCEL_SELECTION = "CancelSelection";
/**
* Instruction to approve the current selection
* (same as pressing yes or ok).
*/
public static final String APPROVE_SELECTION = "ApproveSelection";
/** Identifies change in the text on the approve (yes, ok) button. */
public static final String APPROVE_BUTTON_TEXT_CHANGED_PROPERTY = "ApproveButtonTextChangedProperty";
/**
* Identifies change in the tooltip text for the approve (yes, ok)
* button.
*/
public static final String APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY = "ApproveButtonToolTipTextChangedProperty";
/** Identifies change in the mnemonic for the approve (yes, ok) button. */
public static final String APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY = "ApproveButtonMnemonicChangedProperty";
/** Instruction to display the control buttons. */
public static final String CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY = "ControlButtonsAreShownChangedProperty";
/** Identifies user's directory change. */
public static final String DIRECTORY_CHANGED_PROPERTY = "directoryChanged";
/** Identifies change in user's single-file selection. */
public static final String SELECTED_FILE_CHANGED_PROPERTY = "SelectedFileChangedProperty";
/** Identifies change in user's multiple-file selection. */
public static final String SELECTED_FILES_CHANGED_PROPERTY = "SelectedFilesChangedProperty";
/** Enables multiple-file selections. */
public static final String MULTI_SELECTION_ENABLED_CHANGED_PROPERTY = "MultiSelectionEnabledChangedProperty";
/**
* Says that a different object is being used to find available drives
* on the system.
*/
public static final String FILE_SYSTEM_VIEW_CHANGED_PROPERTY = "FileSystemViewChanged";
/**
* Says that a different object is being used to retrieve file
* information.
*/
public static final String FILE_VIEW_CHANGED_PROPERTY = "fileViewChanged";
/** Identifies a change in the display-hidden-files property. */
public static final String FILE_HIDING_CHANGED_PROPERTY = "FileHidingChanged";
/** User changed the kind of files to display. */
public static final String FILE_FILTER_CHANGED_PROPERTY = "fileFilterChanged";
/**
* Identifies a change in the kind of selection (single,
* multiple, etc.).
*/
public static final String FILE_SELECTION_MODE_CHANGED_PROPERTY = "fileSelectionChanged";
/**
* Says that a different accessory component is in use
* (for example, to preview files).
*/
public static final String ACCESSORY_CHANGED_PROPERTY = "AccessoryChangedProperty";
/**
* Identifies whether a the AcceptAllFileFilter is used or not.
*/
public static final String ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY = "acceptAllFileFilterUsedChanged";
/** Identifies a change in the dialog title. */
public static final String DIALOG_TITLE_CHANGED_PROPERTY = "DialogTitleChangedProperty";
/**
* Identifies a change in the type of files displayed (files only,
* directories only, or both files and directories).
*/
public static final String DIALOG_TYPE_CHANGED_PROPERTY = "DialogTypeChangedProperty";
/**
* Identifies a change in the list of predefined file filters
* the user can choose from.
*/
public static final String CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY = "ChoosableFileFilterChangedProperty";
// ******************************
// ***** instance variables *****
// ******************************
private String dialogTitle = null;
private String approveButtonText = null;
private String approveButtonToolTipText = null;
private int approveButtonMnemonic = 0;
private ActionListener actionListener = null;
private Vector filters = new Vector(5);
private JDialog dialog = null;
private int dialogType = OPEN_DIALOG;
private int returnValue = ERROR_OPTION;
private JComponent accessory = null;
private FileView fileView = null;
// uiFileView is not serialized, as it is initialized
// by updateUI() after deserialization
private transient FileView uiFileView = null;
private boolean controlsShown = true;
private boolean useFileHiding = true;
private static final String SHOW_HIDDEN_PROP = "awt.file.showHiddenFiles";
// Listens to changes in the native setting for showing hidden files.
// The Listener is removed and the native setting is ignored if
// setFileHidingEnabled() is ever called.
private PropertyChangeListener showFilesListener = null;
private int fileSelectionMode = FILES_ONLY;
private boolean multiSelectionEnabled = false;
private boolean useAcceptAllFileFilter = true;
private boolean dragEnabled = false;
private FileFilter fileFilter = null;
private FileSystemView fileSystemView = null;
private File currentDirectory = null;
private File selectedFile = null;
private File[] selectedFiles;
// *************************************
// ***** JFileChooser Constructors *****
// *************************************
/**
* Constructs a JFileChooser
pointing to the user's
* default directory. This default depends on the operating system.
* It is typically the "My Documents" folder on Windows, and the
* user's home directory on Unix.
*/
public JFileChooser() {
this((File) null, (FileSystemView) null);
}
/**
* Constructs a JFileChooser
using the given path.
* Passing in a null
* string causes the file chooser to point to the user's default directory.
* This default depends on the operating system. It is
* typically the "My Documents" folder on Windows, and the user's
* home directory on Unix.
*
* @param currentDirectoryPath a String
giving the path
* to a file or directory
*/
public JFileChooser(String currentDirectoryPath) {
this(currentDirectoryPath, (FileSystemView) null);
}
/**
* Constructs a JFileChooser
using the given File
* as the path. Passing in a null
file
* causes the file chooser to point to the user's default directory.
* This default depends on the operating system. It is
* typically the "My Documents" folder on Windows, and the user's
* home directory on Unix.
*
* @param currentDirectory a File
object specifying
* the path to a file or directory
*/
public JFileChooser(File currentDirectory) {
this(currentDirectory, (FileSystemView) null);
}
/**
* Constructs a JFileChooser
using the given
* FileSystemView
.
*/
public JFileChooser(FileSystemView fsv) {
this((File) null, fsv);
}
/**
* Constructs a JFileChooser
using the given current directory
* and FileSystemView
.
*/
public JFileChooser(File currentDirectory, FileSystemView fsv) {
setup(fsv);
setCurrentDirectory(currentDirectory);
}
/**
* Constructs a JFileChooser
using the given current directory
* path and FileSystemView
.
*/
public JFileChooser(String currentDirectoryPath, FileSystemView fsv) {
setup(fsv);
if(currentDirectoryPath == null) {
setCurrentDirectory(null);
} else {
setCurrentDirectory(fileSystemView.createFileObject(currentDirectoryPath));
}
}
/**
* Performs common constructor initialization and setup.
*/
protected void setup(FileSystemView view) {
// Track native setting for showing hidden files
Toolkit tk = Toolkit.getDefaultToolkit();
Object showHiddenProperty = tk.getDesktopProperty(SHOW_HIDDEN_PROP);
if (showHiddenProperty instanceof Boolean) {
useFileHiding = !((Boolean)showHiddenProperty).booleanValue();
showFilesListener = new WeakPCL(this);
tk.addPropertyChangeListener(SHOW_HIDDEN_PROP, showFilesListener);
}
if(view == null) {
view = FileSystemView.getFileSystemView();
}
setFileSystemView(view);
updateUI();
if(isAcceptAllFileFilterUsed()) {
setFileFilter(getAcceptAllFileFilter());
}
}
/**
* Sets the dragEnabled
property,
* which must be true
to enable
* automatic drag handling (the first part of drag and drop)
* on this component.
* The transferHandler
property needs to be set
* to a non-null
value for the drag to do
* anything. The default value of the dragEnabled
* property
* is false
.
*
*
*
* When automatic drag handling is enabled,
* most look and feels begin a drag-and-drop operation
* whenever the user presses the mouse button over a selection
* and then moves the mouse a few pixels.
* Setting this property to true
* can therefore have a subtle effect on
* how selections behave.
*
*
*
* Some look and feels might not support automatic drag and drop;
* they will ignore this property. You can work around such
* look and feels by modifying the component
* to directly call the exportAsDrag
method of a
* TransferHandler
.
*
* @param b the value to set the dragEnabled
property to
* @exception HeadlessException if
* b
is true
and
* GraphicsEnvironment.isHeadless()
* returns true
* @see java.awt.GraphicsEnvironment#isHeadless
* @see #getDragEnabled
* @see #setTransferHandler
* @see TransferHandler
* @since 1.4
*
* @beaninfo
* description: determines whether automatic drag handling is enabled
* bound: false
*/
public void setDragEnabled(boolean b) {
if (b && GraphicsEnvironment.isHeadless()) {
throw new HeadlessException();
}
dragEnabled = b;
}
/**
* Gets the value of the dragEnabled
property.
*
* @return the value of the dragEnabled
property
* @see #setDragEnabled
* @since 1.4
*/
public boolean getDragEnabled() {
return dragEnabled;
}
// *****************************
// ****** File Operations ******
// *****************************
/**
* Returns the selected file. This can be set either by the
* programmer via setFile
or by a user action, such as
* either typing the filename into the UI or selecting the
* file from a list in the UI.
*
* @see #setSelectedFile
* @return the selected file
*/
public File getSelectedFile() {
return selectedFile;
}
/**
* Sets the selected file. If the file's parent directory is
* not the current directory, changes the current directory
* to be the file's parent directory.
*
* @beaninfo
* preferred: true
* bound: true
*
* @see #getSelectedFile
*
* @param file the selected file
*/
public void setSelectedFile(File file) {
File oldValue = selectedFile;
selectedFile = file;
if(selectedFile != null) {
if (file.isAbsolute() && !getFileSystemView().isParent(getCurrentDirectory(), selectedFile)) {
setCurrentDirectory(selectedFile.getParentFile());
}
if (!isMultiSelectionEnabled() || selectedFiles == null || selectedFiles.length == 1) {
ensureFileIsVisible(selectedFile);
}
}
firePropertyChange(SELECTED_FILE_CHANGED_PROPERTY, oldValue, selectedFile);
}
/**
* Returns a list of selected files if the file chooser is
* set to allow multiple selection.
*/
public File[] getSelectedFiles() {
if(selectedFiles == null) {
return new File[0];
} else {
return (File[]) selectedFiles.clone();
}
}
/**
* Sets the list of selected files if the file chooser is
* set to allow multiple selection.
*
* @beaninfo
* bound: true
* description: The list of selected files if the chooser is in multiple selection mode.
*/
public void setSelectedFiles(File[] selectedFiles) {
File[] oldValue = this.selectedFiles;
if (selectedFiles != null && selectedFiles.length == 0) {
selectedFiles = null;
}
this.selectedFiles = selectedFiles;
setSelectedFile((selectedFiles != null) ? selectedFiles[0] : null);
firePropertyChange(SELECTED_FILES_CHANGED_PROPERTY, oldValue, this.selectedFiles);
}
/**
* Returns the current directory.
*
* @return the current directory
* @see #setCurrentDirectory
*/
public File getCurrentDirectory() {
return currentDirectory;
}
/**
* Sets the current directory. Passing in null
sets the
* file chooser to point to the user's default directory.
* This default depends on the operating system. It is
* typically the "My Documents" folder on Windows, and the user's
* home directory on Unix.
*
* If the file passed in as currentDirectory
is not a
* directory, the parent of the file will be used as the currentDirectory.
* If the parent is not traversable, then it will walk up the parent tree
* until it finds a traversable directory, or hits the root of the
* file system.
*
* @beaninfo
* preferred: true
* bound: true
* description: The directory that the JFileChooser is showing files of.
*
* @param dir the current directory to point to
* @see #getCurrentDirectory
*/
public void setCurrentDirectory(File dir) {
File oldValue = currentDirectory;
if (dir != null && !dir.exists()) {
dir = currentDirectory;
}
if (dir == null) {
dir = getFileSystemView().getDefaultDirectory();
}
if (currentDirectory != null) {
/* Verify the toString of object */
if (this.currentDirectory.equals(dir)) {
return;
}
}
File prev = null;
while (!isTraversable(dir) && prev != dir) {
prev = dir;
dir = getFileSystemView().getParentDirectory(dir);
}
currentDirectory = dir;
firePropertyChange(DIRECTORY_CHANGED_PROPERTY, oldValue, currentDirectory);
}
/**
* Changes the directory to be set to the parent of the
* current directory.
*
* @see #getCurrentDirectory
*/
public void changeToParentDirectory() {
selectedFile = null;
File oldValue = getCurrentDirectory();
setCurrentDirectory(getFileSystemView().getParentDirectory(oldValue));
}
/**
* Tells the UI to rescan its files list from the current directory.
*/
public void rescanCurrentDirectory() {
getUI().rescanCurrentDirectory(this);
}
/**
* Makes sure that the specified file is viewable, and
* not hidden.
*
* @param f a File object
*/
public void ensureFileIsVisible(File f) {
getUI().ensureFileIsVisible(this, f);
}
// **************************************
// ***** JFileChooser Dialog methods *****
// **************************************
/**
* Pops up an "Open File" file chooser dialog. Note that the
* text that appears in the approve button is determined by
* the L&F.
*
* @param parent the parent component of the dialog,
* can be null
;
* see showDialog
for details
* @return the return state of the file chooser on popdown:
*
null
;
* see showDialog
for details
* @return the return state of the file chooser on popdown:
* * filechooser.showDialog(parentFrame, "Run Application"); ** * Alternatively, the following code does the same thing: *
* JFileChooser chooser = new JFileChooser(null); * chooser.setApproveButtonText("Run Application"); * chooser.showDialog(parentFrame, null); ** * * * *
*
* The parent
argument determines two things:
* the frame on which the open dialog depends and
* the component whose position the look and feel
* should consider when placing the dialog. If the parent
* is a Frame
object (such as a JFrame
)
* then the dialog depends on the frame and
* the look and feel positions the dialog
* relative to the frame (for example, centered over the frame).
* If the parent is a component, then the dialog
* depends on the frame containing the component,
* and is positioned relative to the component
* (for example, centered over the component).
* If the parent is null
, then the dialog depends on
* no visible window, and it's placed in a
* look-and-feel-dependent position
* such as the center of the screen.
*
* @param parent the parent component of the dialog;
* can be null
* @param approveButtonText the text of the ApproveButton
* @return the return state of the file chooser on popdown:
*
JDialog
wrapping
* this
centered on the parent
* in the parent
's frame.
* This method can be overriden to further manipulate the dialog,
* to disable resizing, set the location, etc. Example:
* * class MyFileChooser extends JFileChooser { * protected JDialog createDialog(Component parent) throws HeadlessException { * JDialog dialog = super.createDialog(parent); * dialog.setLocation(300, 200); * dialog.setResizable(false); * return dialog; * } * } ** * @param parent the parent component of the dialog; * can be
null
* @return a new JDialog
containing this instance
* @exception HeadlessException if GraphicsEnvironment.isHeadless()
* returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @since 1.4
*/
protected JDialog createDialog(Component parent) throws HeadlessException {
String title = getUI().getDialogTitle(this);
getAccessibleContext().setAccessibleDescription(title);
JDialog dialog;
Window window = JOptionPane.getWindowForComponent(parent);
if (window instanceof Frame) {
dialog = new JDialog((Frame)window, title, true);
} else {
dialog = new JDialog((Dialog)window, title, true);
}
dialog.setComponentOrientation(this.getComponentOrientation());
Container contentPane = dialog.getContentPane();
contentPane.setLayout(new BorderLayout());
contentPane.add(this, BorderLayout.CENTER);
if (JDialog.isDefaultLookAndFeelDecorated()) {
boolean supportsWindowDecorations =
UIManager.getLookAndFeel().getSupportsWindowDecorations();
if (supportsWindowDecorations) {
dialog.getRootPane().setWindowDecorationStyle(JRootPane.FILE_CHOOSER_DIALOG);
}
}
dialog.pack();
dialog.setLocationRelativeTo(parent);
return dialog;
}
// **************************
// ***** Dialog Options *****
// **************************
/**
* Returns the value of the controlButtonsAreShown
* property.
*
* @return the value of the controlButtonsAreShown
* property
*
* @see #setControlButtonsAreShown
* @since 1.3
*/
public boolean getControlButtonsAreShown() {
return controlsShown;
}
/**
* Sets the property
* that indicates whether the approve and cancel
* buttons are shown in the file chooser. This property
* is true
by default. Look and feels
* that always show these buttons will ignore the value
* of this property.
* This method fires a property-changed event,
* using the string value of
* CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY
* as the name of the property.
*
* @param b false
if control buttons should not be
* shown; otherwise, true
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets whether the approve & cancel buttons are shown.
*
* @see #getControlButtonsAreShown
* @see #CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY
* @since 1.3
*/
public void setControlButtonsAreShown(boolean b) {
if(controlsShown == b) {
return;
}
boolean oldValue = controlsShown;
controlsShown = b;
firePropertyChange(CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY, oldValue, controlsShown);
}
/**
* Returns the type of this dialog. The default is
* JFileChooser.OPEN_DIALOG
.
*
* @return the type of dialog to be displayed:
* OPEN_DIALOG
when you
* want to bring up a file chooser that the user can use to open a file.
* Likewise, use SAVE_DIALOG
for letting the user choose
* a file for saving.
* Use CUSTOM_DIALOG
when you want to use the file
* chooser in a context other than "Open" or "Save".
* For instance, you might want to bring up a file chooser that allows
* the user to choose a file to execute. Note that you normally would not
* need to set the JFileChooser
to use
* CUSTOM_DIALOG
* since a call to setApproveButtonText
does this for you.
* The default dialog type is JFileChooser.OPEN_DIALOG
.
*
* @param dialogType the type of dialog to be displayed:
* dialogType
is
* not legal
* @beaninfo
* preferred: true
* bound: true
* description: The type (open, save, custom) of the JFileChooser.
* enum:
* OPEN_DIALOG JFileChooser.OPEN_DIALOG
* SAVE_DIALOG JFileChooser.SAVE_DIALOG
* CUSTOM_DIALOG JFileChooser.CUSTOM_DIALOG
*
* @see #getDialogType
* @see #setApproveButtonText
*/
// PENDING(jeff) - fire button text change property
public void setDialogType(int dialogType) {
if(this.dialogType == dialogType) {
return;
}
if(!(dialogType == OPEN_DIALOG || dialogType == SAVE_DIALOG || dialogType == CUSTOM_DIALOG)) {
throw new IllegalArgumentException("Incorrect Dialog Type: " + dialogType);
}
int oldValue = this.dialogType;
this.dialogType = dialogType;
if(dialogType == OPEN_DIALOG || dialogType == SAVE_DIALOG) {
setApproveButtonText(null);
}
firePropertyChange(DIALOG_TYPE_CHANGED_PROPERTY, oldValue, dialogType);
}
/**
* Sets the string that goes in the JFileChooser
window's
* title bar.
*
* @param dialogTitle the new String
for the title bar
*
* @beaninfo
* preferred: true
* bound: true
* description: The title of the JFileChooser dialog window.
*
* @see #getDialogTitle
*
*/
public void setDialogTitle(String dialogTitle) {
String oldValue = this.dialogTitle;
this.dialogTitle = dialogTitle;
if(dialog != null) {
dialog.setTitle(dialogTitle);
}
firePropertyChange(DIALOG_TITLE_CHANGED_PROPERTY, oldValue, dialogTitle);
}
/**
* Gets the string that goes in the JFileChooser
's titlebar.
*
* @see #setDialogTitle
*/
public String getDialogTitle() {
return dialogTitle;
}
// ************************************
// ***** JFileChooser View Options *****
// ************************************
/**
* Sets the tooltip text used in the ApproveButton
.
* If null
, the UI object will determine the button's text.
*
* @beaninfo
* preferred: true
* bound: true
* description: The tooltip text for the ApproveButton.
*
* @return the text used in the ApproveButton
*
* @see #setApproveButtonText
* @see #setDialogType
* @see #showDialog
*/
public void setApproveButtonToolTipText(String toolTipText) {
if(approveButtonToolTipText == toolTipText) {
return;
}
String oldValue = approveButtonToolTipText;
approveButtonToolTipText = toolTipText;
firePropertyChange(APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY, oldValue, approveButtonToolTipText);
}
/**
* Returns the tooltip text used in the ApproveButton
.
* If null
, the UI object will determine the button's text.
*
* @return the text used in the ApproveButton
*
* @see #setApproveButtonText
* @see #setDialogType
* @see #showDialog
*/
public String getApproveButtonToolTipText() {
return approveButtonToolTipText;
}
/**
* Returns the approve button's mnemonic.
* @return an integer value for the mnemonic key
*
* @see #setApproveButtonMnemonic
*/
public int getApproveButtonMnemonic() {
return approveButtonMnemonic;
}
/**
* Sets the approve button's mnemonic using a numeric keycode.
*
* @param mnemonic an integer value for the mnemonic key
*
* @beaninfo
* preferred: true
* bound: true
* description: The mnemonic key accelerator for the ApproveButton.
*
* @see #getApproveButtonMnemonic
*/
public void setApproveButtonMnemonic(int mnemonic) {
if(approveButtonMnemonic == mnemonic) {
return;
}
int oldValue = approveButtonMnemonic;
approveButtonMnemonic = mnemonic;
firePropertyChange(APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY, oldValue, approveButtonMnemonic);
}
/**
* Sets the approve button's mnemonic using a character.
* @param mnemonic a character value for the mnemonic key
*
* @see #getApproveButtonMnemonic
*/
public void setApproveButtonMnemonic(char mnemonic) {
int vk = (int) mnemonic;
if(vk >= 'a' && vk <='z') {
vk -= ('a' - 'A');
}
setApproveButtonMnemonic(vk);
}
/**
* Sets the text used in the ApproveButton
in the
* FileChooserUI
.
*
* @beaninfo
* preferred: true
* bound: true
* description: The text that goes in the ApproveButton.
*
* @param approveButtonText the text used in the ApproveButton
*
* @see #getApproveButtonText
* @see #setDialogType
* @see #showDialog
*/
// PENDING(jeff) - have ui set this on dialog type change
public void setApproveButtonText(String approveButtonText) {
if(this.approveButtonText == approveButtonText) {
return;
}
String oldValue = this.approveButtonText;
this.approveButtonText = approveButtonText;
firePropertyChange(APPROVE_BUTTON_TEXT_CHANGED_PROPERTY, oldValue, approveButtonText);
}
/**
* Returns the text used in the ApproveButton
in the
* FileChooserUI
.
* If null
, the UI object will determine the button's text.
*
* Typically, this would be "Open" or "Save".
*
* @return the text used in the ApproveButton
*
* @see #setApproveButtonText
* @see #setDialogType
* @see #showDialog
*/
public String getApproveButtonText() {
return approveButtonText;
}
/**
* Gets the list of user choosable file filters.
*
* @return a FileFilter
array containing all the choosable
* file filters
*
* @see #addChoosableFileFilter
* @see #removeChoosableFileFilter
* @see #resetChoosableFileFilters
*/
public FileFilter[] getChoosableFileFilters() {
FileFilter[] filterArray = new FileFilter[filters.size()];
filters.copyInto(filterArray);
return filterArray;
}
/**
* Adds a filter to the list of user choosable file filters.
* For information on setting the file selection mode, see
* {@link #setFileSelectionMode setFileSelectionMode}.
*
* @param filter the FileFilter
to add to the choosable file
* filter list
*
* @beaninfo
* preferred: true
* bound: true
* description: Adds a filter to the list of user choosable file filters.
*
* @see #getChoosableFileFilters
* @see #removeChoosableFileFilter
* @see #resetChoosableFileFilters
* @see #setFileSelectionMode
*/
public void addChoosableFileFilter(FileFilter filter) {
if(filter != null && !filters.contains(filter)) {
FileFilter[] oldValue = getChoosableFileFilters();
filters.addElement(filter);
firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
}
setFileFilter(filter);
}
/**
* Removes a filter from the list of user choosable file filters. Returns
* true if the file filter was removed.
*
* @see #addChoosableFileFilter
* @see #getChoosableFileFilters
* @see #resetChoosableFileFilters
*/
public boolean removeChoosableFileFilter(FileFilter f) {
if(filters.contains(f)) {
if(getFileFilter() == f) {
setFileFilter(null);
}
FileFilter[] oldValue = getChoosableFileFilters();
filters.removeElement(f);
firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
return true;
} else {
return false;
}
}
/**
* Resets the choosable file filter list to its starting state. Normally,
* this removes all added file filters while leaving the
* AcceptAll
file filter.
*
* @see #addChoosableFileFilter
* @see #getChoosableFileFilters
* @see #removeChoosableFileFilter
*/
public void resetChoosableFileFilters() {
FileFilter[] oldValue = getChoosableFileFilters();
setFileFilter(null);
filters.removeAllElements();
if(isAcceptAllFileFilterUsed()) {
addChoosableFileFilter(getAcceptAllFileFilter());
}
firePropertyChange(CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY, oldValue, getChoosableFileFilters());
}
/**
* Returns the AcceptAll
file filter.
* For example, on Microsoft Windows this would be All Files (*.*).
*/
public FileFilter getAcceptAllFileFilter() {
FileFilter filter = null;
if(getUI() != null) {
filter = getUI().getAcceptAllFileFilter(this);
}
return filter;
}
/**
* Returns whether the AcceptAll FileFilter
is used.
* @return true if the AcceptAll FileFilter
is used
* @see #setAcceptAllFileFilterUsed
* @since 1.3
*/
public boolean isAcceptAllFileFilterUsed() {
return useAcceptAllFileFilter;
}
/**
* Determines whether the AcceptAll FileFilter
is used
* as an available choice in the choosable filter list.
* If false, the AcceptAll
file filter is removed from
* the list of available file filters.
* If true, the AcceptAll
file filter will become the
* the actively used file filter.
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets whether the AcceptAll FileFilter is used as an available choice in the choosable filter list.
*
* @see #isAcceptAllFileFilterUsed
* @see #getAcceptAllFileFilter
* @see #setFileFilter
* @since 1.3
*/
public void setAcceptAllFileFilterUsed(boolean b) {
boolean oldValue = useAcceptAllFileFilter;
useAcceptAllFileFilter = b;
if(!b) {
removeChoosableFileFilter(getAcceptAllFileFilter());
} else {
removeChoosableFileFilter(getAcceptAllFileFilter());
addChoosableFileFilter(getAcceptAllFileFilter());
}
firePropertyChange(ACCEPT_ALL_FILE_FILTER_USED_CHANGED_PROPERTY, oldValue, useAcceptAllFileFilter);
}
/**
* Returns the accessory component.
*
* @return this JFileChooser's accessory component, or null
* @see #setAccessory
*/
public JComponent getAccessory() {
return accessory;
}
/**
* Sets the accessory component. An accessory is often used to show a
* preview image of the selected file; however, it can be used for anything
* that the programmer wishes, such as extra custom file chooser controls.
*
*
* Note: if there was a previous accessory, you should unregister
* any listeners that the accessory might have registered with the
* file chooser.
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets the accessory component on the JFileChooser.
*/
public void setAccessory(JComponent newAccessory) {
JComponent oldValue = accessory;
accessory = newAccessory;
firePropertyChange(ACCESSORY_CHANGED_PROPERTY, oldValue, accessory);
}
/**
* Sets the JFileChooser
to allow the user to just
* select files, just select
* directories, or select both files and directories. The default is
* JFilesChooser.FILES_ONLY
.
*
* @param mode the type of files to be displayed:
*
mode
is an
* illegal file selection mode
* @beaninfo
* preferred: true
* bound: true
* description: Sets the types of files that the JFileChooser can choose.
* enum: FILES_ONLY JFileChooser.FILES_ONLY
* DIRECTORIES_ONLY JFileChooser.DIRECTORIES_ONLY
* FILES_AND_DIRECTORIES JFileChooser.FILES_AND_DIRECTORIES
*
*
* @see #getFileSelectionMode
*/
public void setFileSelectionMode(int mode) {
if(fileSelectionMode == mode) {
return;
}
if ((mode == FILES_ONLY) || (mode == DIRECTORIES_ONLY) || (mode == FILES_AND_DIRECTORIES)) {
int oldValue = fileSelectionMode;
fileSelectionMode = mode;
firePropertyChange(FILE_SELECTION_MODE_CHANGED_PROPERTY, oldValue, fileSelectionMode);
} else {
throw new IllegalArgumentException("Incorrect Mode for file selection: " + mode);
}
}
/**
* Returns the current file-selection mode. The default is
* JFilesChooser.FILES_ONLY
.
*
* @return the type of files to be displayed, one of the following:
* FileView
.
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets file hiding on or off.
*
* @param b the boolean value that determines whether file hiding is
* turned on
* @see #isFileHidingEnabled
*/
public void setFileHidingEnabled(boolean b) {
// Dump showFilesListener since we'll ignore it from now on
if (showFilesListener != null) {
Toolkit.getDefaultToolkit().removePropertyChangeListener(SHOW_HIDDEN_PROP, showFilesListener);
showFilesListener = null;
}
boolean oldValue = useFileHiding;
useFileHiding = b;
firePropertyChange(FILE_HIDING_CHANGED_PROPERTY, oldValue, useFileHiding);
}
/**
* Sets the current file filter. The file filter is used by the
* file chooser to filter out files from the user's view.
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets the File Filter used to filter out files of type.
*
* @param filter the new current file filter to use
* @see #getFileFilter
*/
public void setFileFilter(FileFilter filter) {
FileFilter oldValue = fileFilter;
fileFilter = filter;
if (filter != null) {
if (isMultiSelectionEnabled() && selectedFiles != null && selectedFiles.length > 0) {
Vector fList = new Vector();
boolean failed = false;
for (int i = 0; i < selectedFiles.length; i++) {
if (filter.accept(selectedFiles[i])) {
fList.add(selectedFiles[i]);
} else {
failed = true;
}
}
if (failed) {
setSelectedFiles((fList.size() == 0) ? null : (File[])fList.toArray(new File[fList.size()]));
}
} else if (selectedFile != null && !filter.accept(selectedFile)) {
setSelectedFile(null);
}
}
firePropertyChange(FILE_FILTER_CHANGED_PROPERTY, oldValue, fileFilter);
}
/**
* Returns the currently selected file filter.
*
* @return the current file filter
* @see #setFileFilter
* @see #addChoosableFileFilter
*/
public FileFilter getFileFilter() {
return fileFilter;
}
/**
* Sets the file view to used to retrieve UI information, such as
* the icon that represents a file or the type description of a file.
*
* @beaninfo
* preferred: true
* bound: true
* description: Sets the File View used to get file type information.
*
* @see #getFileView
*/
public void setFileView(FileView fileView) {
FileView oldValue = this.fileView;
this.fileView = fileView;
firePropertyChange(FILE_VIEW_CHANGED_PROPERTY, oldValue, fileView);
}
/**
* Returns the current file view.
*
* @see #setFileView
*/
public FileView getFileView() {
return fileView;
}
// ******************************
// *****FileView delegation *****
// ******************************
// NOTE: all of the following methods attempt to delegate
// first to the client set fileView, and if null
is returned
// (or there is now client defined fileView) then calls the
// UI's default fileView.
/**
* Returns the filename.
* @param f the File
* @return the String
containing the filename for
* f
* @see FileView#getName
*/
public String getName(File f) {
String filename = null;
if(f != null) {
if(getFileView() != null) {
filename = getFileView().getName(f);
}
if(filename == null && uiFileView != null) {
filename = uiFileView.getName(f);
}
}
return filename;
}
/**
* Returns the file description.
* @param f the File
* @return the String
containing the file description for
* f
* @see FileView#getDescription
*/
public String getDescription(File f) {
String description = null;
if(f != null) {
if(getFileView() != null) {
description = getFileView().getDescription(f);
}
if(description == null && uiFileView != null) {
description = uiFileView.getDescription(f);
}
}
return description;
}
/**
* Returns the file type.
* @param f the File
* @return the String
containing the file type description for
* f
* @see FileView#getTypeDescription
*/
public String getTypeDescription(File f) {
String typeDescription = null;
if(f != null) {
if(getFileView() != null) {
typeDescription = getFileView().getTypeDescription(f);
}
if(typeDescription == null && uiFileView != null) {
typeDescription = uiFileView.getTypeDescription(f);
}
}
return typeDescription;
}
/**
* Returns the icon for this file or type of file, depending
* on the system.
* @param f the File
* @return the Icon
for this file, or type of file
* @see FileView#getIcon
*/
public Icon getIcon(File f) {
Icon icon = null;
if (f != null) {
if(getFileView() != null) {
icon = getFileView().getIcon(f);
}
if(icon == null && uiFileView != null) {
icon = uiFileView.getIcon(f);
}
}
return icon;
}
/**
* Returns true if the file (directory) can be visited.
* Returns false if the directory cannot be traversed.
* @param f the File
* @return true if the file/directory can be traversed, otherwise false
* @see FileView#isTraversable
*/
public boolean isTraversable(File f) {
Boolean traversable = null;
if (f != null) {
if (getFileView() != null) {
traversable = getFileView().isTraversable(f);
}
if (traversable == null && uiFileView != null) {
traversable = uiFileView.isTraversable(f);
}
if (traversable == null) {
traversable = getFileSystemView().isTraversable(f);
}
}
return (traversable != null && traversable.booleanValue());
}
/**
* Returns true if the file should be displayed.
* @param f the File
* @return true if the file should be displayed, otherwise false
* @see FileFilter#accept
*/
public boolean accept(File f) {
boolean shown = true;
if(f != null && fileFilter != null) {
shown = fileFilter.accept(f);
}
return shown;
}
/**
* Sets the file system view that the JFileChooser
uses for
* accessing and creating file system resources, such as finding
* the floppy drive and getting a list of root drives.
* @param fsv the new FileSystemView
*
* @beaninfo
* expert: true
* bound: true
* description: Sets the FileSytemView used to get filesystem information.
*
* @see FileSystemView
*/
public void setFileSystemView(FileSystemView fsv) {
FileSystemView oldValue = fileSystemView;
fileSystemView = fsv;
firePropertyChange(FILE_SYSTEM_VIEW_CHANGED_PROPERTY, oldValue, fileSystemView);
}
/**
* Returns the file system view.
* @return the FileSystemView
object
* @see #setFileSystemView
*/
public FileSystemView getFileSystemView() {
return fileSystemView;
}
// **************************
// ***** Event Handling *****
// **************************
/**
* Called by the UI when the user hits the Approve button
* (labeled "Open" or "Save", by default). This can also be
* called by the programmer.
* This method causes an action event to fire
* with the command string equal to
* APPROVE_SELECTION
.
*
* @see #APPROVE_SELECTION
*/
public void approveSelection() {
returnValue = APPROVE_OPTION;
if(dialog != null) {
dialog.setVisible(false);
}
fireActionPerformed(APPROVE_SELECTION);
}
/**
* Called by the UI when the user chooses the Cancel button.
* This can also be called by the programmer.
* This method causes an action event to fire
* with the command string equal to
* CANCEL_SELECTION
.
*
* @see #CANCEL_SELECTION
*/
public void cancelSelection() {
returnValue = CANCEL_OPTION;
if(dialog != null) {
dialog.setVisible(false);
}
fireActionPerformed(CANCEL_SELECTION);
}
/**
* Adds an ActionListener
to the file chooser.
*
* @param l the listener to be added
*
* @see #approveSelection
* @see #cancelSelection
*/
public void addActionListener(ActionListener l) {
listenerList.add(ActionListener.class, l);
}
/**
* Removes an ActionListener
from the file chooser.
*
* @param l the listener to be removed
*
* @see #addActionListener
*/
public void removeActionListener(ActionListener l) {
listenerList.remove(ActionListener.class, l);
}
/**
* Returns an array of all the action listeners
* registered on this file chooser.
*
* @return all of this file chooser's ActionListener
s
* or an empty
* array if no action listeners are currently registered
*
* @see #addActionListener
* @see #removeActionListener
*
* @since 1.4
*/
public ActionListener[] getActionListeners() {
return (ActionListener[])listenerList.getListeners(
ActionListener.class);
}
/**
* Notifies all listeners that have registered interest for
* notification on this event type. The event instance
* is lazily created using the command
parameter.
*
* @see EventListenerList
*/
protected void fireActionPerformed(String command) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
long mostRecentEventTime = EventQueue.getMostRecentEventTime();
int modifiers = 0;
AWTEvent currentEvent = EventQueue.getCurrentEvent();
if (currentEvent instanceof InputEvent) {
modifiers = ((InputEvent)currentEvent).getModifiers();
} else if (currentEvent instanceof ActionEvent) {
modifiers = ((ActionEvent)currentEvent).getModifiers();
}
ActionEvent e = null;
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners[i]==ActionListener.class) {
// Lazily create the event:
if (e == null) {
e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED,
command, mostRecentEventTime,
modifiers);
}
((ActionListener)listeners[i+1]).actionPerformed(e);
}
}
}
private static class WeakPCL implements PropertyChangeListener {
WeakReferencereadObject
and writeObject
in
* JComponent
for more
* information about serialization in Swing.
*/
private void writeObject(ObjectOutputStream s) throws IOException {
FileSystemView fsv = null;
if (isAcceptAllFileFilterUsed()) {
//The AcceptAllFileFilter is UI specific, it will be reset by
//updateUI() after deserialization
removeChoosableFileFilter(getAcceptAllFileFilter());
}
if (fileSystemView.equals(FileSystemView.getFileSystemView())) {
//The default FileSystemView is platform specific, it will be
//reset by updateUI() after deserialization
fsv = fileSystemView;
fileSystemView = null;
}
s.defaultWriteObject();
if (fsv != null) {
fileSystemView = fsv;
}
if (isAcceptAllFileFilterUsed()) {
addChoosableFileFilter(getAcceptAllFileFilter());
}
if (getUIClassID().equals(uiClassID)) {
byte count = JComponent.getWriteObjCounter(this);
JComponent.setWriteObjCounter(this, --count);
if (count == 0 && ui != null) {
ui.installUI(this);
}
}
}
/**
* Returns a string representation of this JFileChooser
.
* This method
* is intended to be used only for debugging purposes, and the
* content and format of the returned string may vary between
* implementations. The returned string may be empty but may not
* be null
.
*
* @return a string representation of this JFileChooser
*/
protected String paramString() {
String approveButtonTextString = (approveButtonText != null ?
approveButtonText: "");
String dialogTitleString = (dialogTitle != null ?
dialogTitle: "");
String dialogTypeString;
if (dialogType == OPEN_DIALOG) {
dialogTypeString = "OPEN_DIALOG";
} else if (dialogType == SAVE_DIALOG) {
dialogTypeString = "SAVE_DIALOG";
} else if (dialogType == CUSTOM_DIALOG) {
dialogTypeString = "CUSTOM_DIALOG";
} else dialogTypeString = "";
String returnValueString;
if (returnValue == CANCEL_OPTION) {
returnValueString = "CANCEL_OPTION";
} else if (returnValue == APPROVE_OPTION) {
returnValueString = "APPROVE_OPTION";
} else if (returnValue == ERROR_OPTION) {
returnValueString = "ERROR_OPTION";
} else returnValueString = "";
String useFileHidingString = (useFileHiding ?
"true" : "false");
String fileSelectionModeString;
if (fileSelectionMode == FILES_ONLY) {
fileSelectionModeString = "FILES_ONLY";
} else if (fileSelectionMode == DIRECTORIES_ONLY) {
fileSelectionModeString = "DIRECTORIES_ONLY";
} else if (fileSelectionMode == FILES_AND_DIRECTORIES) {
fileSelectionModeString = "FILES_AND_DIRECTORIES";
} else fileSelectionModeString = "";
String currentDirectoryString = (currentDirectory != null ?
currentDirectory.toString() : "");
String selectedFileString = (selectedFile != null ?
selectedFile.toString() : "");
return super.paramString() +
",approveButtonText=" + approveButtonTextString +
",currentDirectory=" + currentDirectoryString +
",dialogTitle=" + dialogTitleString +
",dialogType=" + dialogTypeString +
",fileSelectionMode=" + fileSelectionModeString +
",returnValue=" + returnValueString +
",selectedFile=" + selectedFileString +
",useFileHiding=" + useFileHidingString;
}
/////////////////
// Accessibility support
////////////////
protected AccessibleContext accessibleContext = null;
/**
* Gets the AccessibleContext associated with this JFileChooser.
* For file choosers, the AccessibleContext takes the form of an
* AccessibleJFileChooser.
* A new AccessibleJFileChooser instance is created if necessary.
*
* @return an AccessibleJFileChooser that serves as the
* AccessibleContext of this JFileChooser
*/
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleJFileChooser();
}
return accessibleContext;
}
/**
* This class implements accessibility support for the
* JFileChooser
class. It provides an implementation of the
* Java Accessibility API appropriate to file chooser user-interface
* elements.
*/
protected class AccessibleJFileChooser extends AccessibleJComponent {
/**
* Gets the role of this object.
*
* @return an instance of AccessibleRole describing the role of the
* object
* @see AccessibleRole
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.FILE_CHOOSER;
}
} // inner class AccessibleJFileChooser
}