wjhk.jupload2.gui
Class IconWorker

java.lang.Object
  wjhk.jupload2.gui.IconWorker

All Implemented Interfaces:

Runnable

 class IconWorker
extends Object
implements Runnable

The IconWorker class loads a icon from a file. It's called from a backup thread created by the JUploadFileView class. This allows to load/calculate icons in background. This prevent the applet to be freezed while icons are loading.
Instances of this class can have the following status, in this order:

STATUS_NOT_LOADED: This icon is not loaded, and its loading is not requested. This status is the default one, on creation.

STATUS_TO_BE_LOADED: This icon is on the list of icon to load. This status is written by the JUploadFileView#execute(IconWorker) method.

STATUS_LOADING: Indicates the IconWorker#loadIcon() has been called, but is not finished.

STATUS_LOADED: The icon is loaded, and ready to be displayed.

STATUS_ERROR_WHILE_LOADING: Too bad, the applet could not load the icon. It won't be tried again.

Field Summary

(package private) File	file The file whose icon must be loaded.
(package private) JFileChooser	fileChooser The current file chooser.
(package private) JUploadFileView	fileView The current file view
(package private) Icon	icon The icon for this file.
(package private) int	status Current loading status for this worker
(package private) static int	STATUS_ERROR_WHILE_LOADING Indicates that an error occurs, during the icon creation
(package private) static int	STATUS_LOADED Indicates that the icon for this file has been loaded
(package private) static int	STATUS_LOADING Indicated that the creation of the icon for this file has started.
(package private) static int	STATUS_NOT_LOADED Indicates the loading of the icon for this file is not currently requested.
(package private) static int	STATUS_TO_BE_LOADED Indicates the loading of the icon for this file has been requested, but has not started yet.
(package private) UploadPolicy	uploadPolicy The current upload policy

Constructor Summary

IconWorker(UploadPolicy uploadPolicy, JFileChooser fileChooser, JUploadFileView fileView, File file)
The constructor only stores the file.

Method Summary

(package private) Icon	getIcon() Returns the currently loaded icon for this file.
(package private) void	loadIcon() Get the icon from the current upload policy, for this file.
void	run() Implementation of the Runnable interface

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_ERROR_WHILE_LOADING

static final int STATUS_ERROR_WHILE_LOADING

Indicates that an error occurs, during the icon creation

See Also:

Constant Field Values

STATUS_LOADED

static final int STATUS_LOADED

Indicates that the icon for this file has been loaded

See Also:

Constant Field Values

STATUS_LOADING

static final int STATUS_LOADING

Indicated that the creation of the icon for this file has started. But it is not ready yet.

See Also:

Constant Field Values

STATUS_TO_BE_LOADED

static final int STATUS_TO_BE_LOADED

Indicates the loading of the icon for this file has been requested, but has not started yet.

See Also:

Constant Field Values

STATUS_NOT_LOADED

static final int STATUS_NOT_LOADED

Indicates the loading of the icon for this file is not currently requested. The loading may have been requested, then cancelled, for instance of the user changes the current directory or closes the file chooser.

See Also:

Constant Field Values

uploadPolicy

UploadPolicy uploadPolicy

The current upload policy

fileChooser

JFileChooser fileChooser

The current file chooser.

fileView

JUploadFileView fileView

The current file view

file

File file

The file whose icon must be loaded.

icon

Icon icon

The icon for this file.

status

int status

Current loading status for this worker

Constructor Detail

IconWorker

IconWorker(UploadPolicy uploadPolicy,
           JFileChooser fileChooser,
           JUploadFileView fileView,
           File file)

The constructor only stores the file. The background thread will call the loadIcon method.

Parameters:

file - The file whose icon must be loaded/calculated.

Method Detail

getIcon

Icon getIcon()

Returns the currently loaded icon for this file.

Returns:

The Icon to be displayed for this file.

loadIcon

void loadIcon()

Get the icon from the current upload policy, for this file. This methods does something only if the current status for the icon is STATUS_TO_BE_LOADED. If not, this method does nothing.

run

public void run()

Implementation of the Runnable interface

Specified by:

run in interface Runnable