uk.ac.starlink.topcat
Class DownloadDialog

java.lang.Object
  extended by uk.ac.starlink.topcat.DownloadDialog

public abstract class DownloadDialog
extends Object

Provides a dialogue that disposes of a URL by downloading the resource to a location specified interactively by the user.

Since:
15 Jun 2018
Author:
Mark Taylor

Constructor Summary
DownloadDialog()
           
 
Method Summary
abstract  File chooseFileEdt()
          Acquires a destination File for a downloaded resource by interacting with the user.
static DownloadDialog createSwingDialog(Component parent)
          Returns an instance of this class based on a Swing JFileChooser.
static DownloadDialog createSystemDialog(Component parent)
          Returns an instance of this class based on an AWT FileDialog.
 Outcome userDownload(URL url)
          Downloads the resource from a given URL to a file selected interactively by the user.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DownloadDialog

public DownloadDialog()
Method Detail

chooseFileEdt

public abstract File chooseFileEdt()
Acquires a destination File for a downloaded resource by interacting with the user. This method is invoked on the Event Dispatch Thread.

Returns:
user-selected destination file, or null if the operation is cancelled

userDownload

public Outcome userDownload(URL url)
Downloads the resource from a given URL to a file selected interactively by the user. This method is not invoked on the Event Dispatch Thread.

Parameters:
url - location of resource to download
Returns:
operation outcome

createSystemDialog

public static DownloadDialog createSystemDialog(Component parent)
Returns an instance of this class based on an AWT FileDialog. This provides less consistency, but possibly tighter system interaction.

Parameters:
parent - parent component
Returns:
dialog

createSwingDialog

public static DownloadDialog createSwingDialog(Component parent)
Returns an instance of this class based on a Swing JFileChooser. This provides a GUI that is consistent between different platforms.

Parameters:
parent - parent component
Returns:
dialog


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