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Class ncsa.horizon.modules.DatasetChooserPanel

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----ncsa.horizon.modules.DatasetChooserPanel

public class DatasetChooserPanel

extends Panel

browse

browserFrame

current

currentName

defChoice

dsurls

editChoice

the string that tells user to edit the test in the URL TextField

fileBrowser

getIt

loadAlerter

the delegate Observerable

reset

store

urlField

wdir

DatasetChooserPanel()

Create a blank DatasetChooserPanel

DatasetChooserPanel(int)

Create a blank DatasetChooserPanel

DatasetChooserPanel(String)

Create a DatasetChooserPanel with default string in URL TextField

DatasetChooserPanel(String, Frame)

Create a DatasetChooserPanel with default string in URL TextField

DatasetChooserPanel(String, int)

Create a DatasetChooserPanel with default string in URL TextField

DatasetChooserPanel(String, int, Frame)

Create a DatasetChooserPanel with default string in URL TextField

action(Event, Object)

addDatasetURL(String, String)

add predefined dataset URL to the choice menu

addObserver(Observer)

add an Observer that wants to be alerted when there has been a request to load a dataset.

canBrowse()

return whether a FileDialog window can be opened.

doSelectDataset(String)

respond to a change in the dataset Choice menu

getBrowseButton()

return a reference to the "Browse..." Button

getDataChoice()

return a reference to the data Choice menu

getLoadButton()

return a reference to the "Load" button

getObservable()

return a reference to the actual Observable object used by this Panel.

getReloadCurrentButton()

return a reference to the "Reload Current" Button

getRequestedDataset()

return the URL string for the last dataset for which there was a load request, or null if a request has not yet been made.

getURLString()

return the URL string currently in the URL TextField

getURLTextField()

return a reference to the url TextField

layoutComponents()

layout the components.

loadData()

request that the dataset given by the string appearing in the URL TextField be loaded.

main(String[])

openFileBrowser()

open a FileDialog window for the selection of a file from the local filesystem.

reloadCurrentData()

reload the last dataset that was loaded either via the "Load" button or an explicit call to the loadData() method.

rememberURL()

selectDataset(String)

select the dataset with the given name.

setAutoFileLoad(boolean)

set whether a dataset will automatically be loaded when the File browser window is closed.

setBrowsing(boolean)

set whether a FileDialog window can be opened.

setURLText(String)

set the String appearing in the URL TextField.

setWorkingDirectory(String)

the default working directory for the file browser window

willAutoLoadFile()

return whether a dataset will automatically be loaded when the File browser window is closed.

  protected Button getIt

  protected TextField urlField

  protected Choice defChoice

  protected Button store

  protected Button browse

  protected Button reset

  protected FileDialog fileBrowser

  protected Frame browserFrame

  protected String current

  protected String currentName

  protected String wdir

  protected Properties dsurls

  protected String editChoice

the string that tells user to edit the test in the URL TextField

  protected Observable loadAlerter

the delegate Observerable

  public DatasetChooserPanel()

Create a blank DatasetChooserPanel

  public DatasetChooserPanel(int cols)

Create a blank DatasetChooserPanel

  public DatasetChooserPanel(String defURL)

Create a DatasetChooserPanel with default string in URL TextField

  public DatasetChooserPanel(String defURL,
                             Frame parent)

Create a DatasetChooserPanel with default string in URL TextField

  public DatasetChooserPanel(String defURL,
                             int cols)

Create a DatasetChooserPanel with default string in URL TextField

Parameters:

defURL - the string to appear in the URL TextField

cols - the default number of columns in the URL TextField; the actual width may be larger depending on the layout of this Component in its Container.

  public DatasetChooserPanel(String defURL,
                             int cols,
                             Frame parent)

Create a DatasetChooserPanel with default string in URL TextField

Parameters:

defURL - the string to appear in the URL TextField (can be null).

cols - the default number of columns in the URL TextField; the actual width may be larger depending on the layout of this Component in its Container.

parent - the Frame that will hold this Panel; this is needed if browsing of the local filesystem is desired.

  protected void layoutComponents()

layout the components.

  public void addObserver(Observer o)

add an Observer that wants to be alerted when there has been a request to load a dataset.

  public Observable getObservable()

return a reference to the actual Observable object used by this Panel.

  public Button getLoadButton()

return a reference to the "Load" button

  public TextField getURLTextField()

return a reference to the url TextField

  public Choice getDataChoice()

return a reference to the data Choice menu

  public Button getBrowseButton()

return a reference to the "Browse..." Button

  public Button getReloadCurrentButton()

return a reference to the "Reload Current" Button

  public String getURLString()

return the URL string currently in the URL TextField

  public synchronized void addDatasetURL(String datasetName,
                                         String datasetURL)

add predefined dataset URL to the choice menu

Parameters:

datasetName - the name that will appear on the Choice menu

datasetURL - the URL string that will return that dataset

  public boolean action(Event e,
                        Object what)

Overrides:

action in class Component

  public void setAutoFileLoad(boolean doIt)

set whether a dataset will automatically be loaded when the File browser window is closed.

  public boolean willAutoLoadFile()

return whether a dataset will automatically be loaded when the File browser window is closed. This method will always return false if a call to canBrowse() would return false.

  public boolean canBrowse()

return whether a FileDialog window can be opened.

  public boolean setBrowsing(boolean allow)

set whether a FileDialog window can be opened.

Returns:

s false if this state cannot be change; to enable browsing, a Frame must have been passed to this class's constructor.

  public boolean setWorkingDirectory(String dirname)

the default working directory for the file browser window

Returns:

s false if this directory cannot be set (because a Frame was not passed to this object's constructor

  public void openFileBrowser()

open a FileDialog window for the selection of a file from the local filesystem. This method does nothing if a call to canBrowse() would return false.

  public String getRequestedDataset()

return the URL string for the last dataset for which there was a load request, or null if a request has not yet been made.

  public synchronized void loadData()

request that the dataset given by the string appearing in the URL TextField be loaded. All observers will be alerted and given the dataset's URL string as an argument.

  public synchronized void setURLText(String url)

set the String appearing in the URL TextField. This method will cause the TextField to become editable, and the dataset Choice menu will be set to the "Enter URL above" choice.

  public synchronized void reloadCurrentData()

reload the last dataset that was loaded either via the "Load" button or an explicit call to the loadData() method. Nothing happens if no data has yet been loaded. This method is called when the "Reload Current" button is pressed.

  public synchronized void selectDataset(String name)

select the dataset with the given name. This equivalent to making a choice via the GUI.

Parameters:

name - one of the Strings that appears in the dataset Choice menu

  protected synchronized void doSelectDataset(String name)

respond to a change in the dataset Choice menu

  public synchronized void rememberURL()

  public static void main(String args[])

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