Package ucar.ui.widget

Class ProgressMonitor

java.lang.Object

ucar.ui.widget.ProgressMonitor

public class ProgressMonitor
extends Object

This wraps a javax.swing.ProgressMonitor, which allows tasks to be canceled. This class adds extra behavior to javax.swing.ProgressMonitor:

1. Pass in the ProgressMonitorTask you want to monitor.
2. Throws an actionEvent (on the AWT event thread) when the task is done.
3. If an error, pops up an error message.
4. Get status: success/failed/cancel when task is done.

The ProgressMonitorTask is run in a background thread while a javax.swing.ProgressMonitor dialog box shows progress. The task is checked every second to see if its done or canceled.

 Example:

 AddDatasetTask task = new AddDatasetTask(datasets);
 ProgressMonitor pm = new ProgressMonitor(task);
 pm.addActionListener( new ActionListener() {
  public void actionPerformed(ActionEvent e) {
   if (e.getActionCommand().equals("success")) {
     doGoodStuff();
   }
  }
 });
 pm.start( this, "Add Datasets", datasets.size());

 (or)

 AddDatasetTask task = new AddDatasetTask(datasets);
 ProgressMonitor pm = new ProgressMonitor(task, () -> doGoodStuff());
 pm.start( this, "Add Datasets", datasets.size());
 

Constructor Summary

Constructors

Constructor	Description
ProgressMonitor(ProgressMonitorTask task)
ProgressMonitor(ProgressMonitorTask task, ActionListener successListener)

Method Summary

Modifier and Type	Method	Description
void	addActionListener(ActionListener l)	Add listener: action event sent when task is done.
ProgressMonitorTask	getTask()
void	removeActionListener(ActionListener l)
void	start(Component top, String taskName, int progressMaxCount)	Call this from awt event thread.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProgressMonitor

public ProgressMonitor(ProgressMonitorTask task)

ProgressMonitor

public ProgressMonitor(ProgressMonitorTask task,
                       ActionListener successListener)

Method Detail

getTask

public ProgressMonitorTask getTask()

addActionListener

public void addActionListener(ActionListener l)

Add listener: action event sent when task is done. event.getActionCommand() =

• "success"
• "error"
• "cancel"
• "done" if done, but success/error/cancel not set

removeActionListener

public void removeActionListener(ActionListener l)

start

public void start(Component top,
                  String taskName,
                  int progressMaxCount)

Call this from awt event thread. The task is run in a background thread.

Parameters:

top - put ProgressMonitor on top of this component (may be null)

taskName - display name of task

progressMaxCount - maximum number of Progress indicator