meka.gui.core

Class RecentFilesHandler<M>

java.lang.Object

meka.gui.core.AbstractRecentItemsHandler<M,File>

meka.gui.core.RecentFilesHandler<M>

All Implemented Interfaces:

Serializable

public class RecentFilesHandler<M>
extends AbstractRecentItemsHandler<M,File>

A class that handles a list of recent files. Reads/writes them from/to a props file in the application's home directory.

Version:

$Revision: 10824 $

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	m_MinNumParentDirs the minimum number of parent directories to use.
static String	RECENTFILES_COUNT the property for storing the number of recent files.
static String	RECENTFILES_PREFIX the property prefix for a recent file.

Fields inherited from class meka.gui.core.AbstractRecentItemsHandler

m_IgnoreChanges, m_Listeners, m_MaxCount, m_Menu, m_PropertiesFile, m_PropertyPrefix, m_RecentItems

Constructor Summary

Constructors

Constructor and Description
RecentFilesHandler(String propsFile, int maxCount, M menu) Initializes the handler.
RecentFilesHandler(String propsFile, M menu) Initializes the handler with a maximum of 5 items.
RecentFilesHandler(String propsFile, String propPrefix, int maxCount, M menu) Initializes the handler.

Method Summary

Modifier and Type	Method and Description
protected boolean	check(File item) Checks the item after obtaining from the props file.
protected String	createMenuItemText(int index, File item) Generates the text for the menuitem.
protected int	determineMinimumNumberOfParentDirs() Determines the minimum number of parent directories that need to be included in the filename to make the filenames in the menu distinguishable.
protected File	fromString(String s) Turns the string obtained from the props into an object again.
protected String	getCountKey() Returns the key to use for the counts in the props file.
protected String	getItemPrefix() Returns the key prefix to use for the items in the props file.
protected void	preUpdateMenu() Hook method which gets executed just before updating the menu.
protected String	toString(File obj) Turns an object into a string for storing in the props.

Methods inherited from class meka.gui.core.AbstractRecentItemsHandler

addRecentItem, addRecentItemListener, doUpdateMenu, expand, getMaxCount, getMenu, getPropertiesFile, getPropertyPrefix, getRecentItems, loadProps, notifyRecentItemListenersOfAdd, notifyRecentItemListenersOfSelect, postUpdateMenu, readProps, removeAll, removeRecentItem, removeRecentItemListener, size, updateMenu, writeProps

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RECENTFILES_COUNT

public static final String RECENTFILES_COUNT

the property for storing the number of recent files.

See Also:

Constant Field Values

RECENTFILES_PREFIX

public static final String RECENTFILES_PREFIX

the property prefix for a recent file.

See Also:

Constant Field Values

m_MinNumParentDirs

protected int m_MinNumParentDirs

the minimum number of parent directories to use.

Constructor Detail

RecentFilesHandler

public RecentFilesHandler(String propsFile,
                          M menu)

Initializes the handler with a maximum of 5 items.

Parameters:

propsFile - the props file to store the files in

menu - the menu to add the recent files as subitems to

RecentFilesHandler

public RecentFilesHandler(String propsFile,
                          int maxCount,
                          M menu)

Initializes the handler.

Parameters:

propsFile - the props file to store the files in

maxCount - the maximum number of files to keep in menu

menu - the menu to add the recent files as subitems to

RecentFilesHandler

public RecentFilesHandler(String propsFile,
                          String propPrefix,
                          int maxCount,
                          M menu)

Initializes the handler.

Parameters:

propsFile - the props file to store the files in

propPrefix - the properties prefix, use null to ignore

maxCount - the maximum number of files to keep in menu

menu - the menu to add the recent files as subitems to

Method Detail

check

protected boolean check(File item)

Checks the item after obtaining from the props file.

File must exist.

Overrides:

check in class AbstractRecentItemsHandler<M,File>

Parameters:

item - the item to check

Returns:

true if checks passed

determineMinimumNumberOfParentDirs

protected int determineMinimumNumberOfParentDirs()

Determines the minimum number of parent directories that need to be included in the filename to make the filenames in the menu distinguishable.

Returns:

the minimum number of parent directories, -1 means full path

getCountKey

protected String getCountKey()

Returns the key to use for the counts in the props file.

Specified by:

getCountKey in class AbstractRecentItemsHandler<M,File>

Returns:

the key

getItemPrefix

protected String getItemPrefix()

Returns the key prefix to use for the items in the props file.

Specified by:

getItemPrefix in class AbstractRecentItemsHandler<M,File>

Returns:

the prefix

toString

protected String toString(File obj)

Turns an object into a string for storing in the props.

Specified by:

toString in class AbstractRecentItemsHandler<M,File>

Parameters:

obj - the object to convert

Returns:

the string representation

fromString

protected File fromString(String s)

Turns the string obtained from the props into an object again.

Specified by:

fromString in class AbstractRecentItemsHandler<M,File>

Parameters:

s - the string representation

Returns:

the parsed object

preUpdateMenu

protected void preUpdateMenu()

Hook method which gets executed just before updating the menu.

Overrides:

preUpdateMenu in class AbstractRecentItemsHandler<M,File>

createMenuItemText

protected String createMenuItemText(int index,
                                    File item)

Generates the text for the menuitem.

Specified by:

createMenuItemText in class AbstractRecentItemsHandler<M,File>

Parameters:

index - the index of the item

item - the item itself

Returns:

the generated text