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<TITLE>Creating a Progress Monitor Dialog (Java Developers Almanac Example)
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<B><A HREF="../javax.swing/pkg.html#Progress Monitor">Progress Monitor</A></B><font color="#666666" class="xsmall-font">
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<h3>e806. Creating a Progress Monitor Dialog</h3>
A common feature of a user interface is to show a progress dialog
that visually displays the progress of a long-running task.
The dialog automatically disappears when the task is done.
The <code>ProgressMonitor</code> class is a convenient dialog that
implements a progress dialog.
<P> The progress monitor contains a message which describes the
long-running task. The message does not change for the duration of the
task. The progress monitor also allows for a <font color="#0066ff"><i>note</i></font> which is a
description of the current subtask. For example, if the task is
copying a set of files, the note could be the name of the current file
being copied.
<P> Note: A progress monitor should not be reused. The properties
that control when the dialog should appear are set when the monitor is
constructed and cannot be reset.
<P> See also <a href="../javax.swing/progress_Progress.html" class="eglink"><b>e801</b> Creating a JProgressBar Component</a>.
<pre> // This message describes the task that is running
String message = <font color="#0066ff"><i>"Description of Task"</i></font>;
// This string describes a subtask; set to null if not needed
String note = <font color="#0066ff"><i>"subtask"</i></font>;
// Set the title of the dialog if desired
String title = <font color="#0066ff"><i>"Task Title"</i></font>;
UIManager.put("ProgressMonitor.progressText", title);
// Create a progress monitor dialog.
// The dialog will use the supplied component's frame as the parent.
int min = <font color="#0066ff"><i>0</i></font>;
int max = <font color="#0066ff"><i>100</i></font>;
ProgressMonitor pm = new ProgressMonitor(<font color="#0066ff"><i>component</i></font>, message, note, min, max);
</pre>
As the task progresses, check to see if the task has been cancelled
and if not, call <code>setProgress()</code> and supply its current state.
<pre> // Check if the dialog has been cancelled
boolean cancelled = pm.isCanceled();
if (cancelled) {
// Stop task
} else {
// Set new state
pm.setProgress(<font color="#0066ff"><i>newValue</i></font>);
// Change the note if desired
pm.setNote(<font color="#0066ff"><i>"New Note"</i></font>);
}
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e807. <a class="eglink" href="ProgMonPop.html?l=rel">
Setting the Popup Delay of a Progress Monitor Dialog
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JProgressBar
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