nuclex-shared-dotnet/Nuclex.Windows.Forms
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Extracted and improved the code used to asynchronously update a progress bar without blocking in order to remove similar code from the progress dialog and the tracking bar

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git-svn-id: file:///srv/devel/repo-conversion/nuwi@9 d2e56fa2-650e-0410-a79f-9358c0239efd
This commit is contained in:
Markus Ewald 2007-07-19 21:16:20 +00:00
parent c5fba24733
commit 4734c35111
4 changed files with 154 additions and 15 deletions
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19
Source/ProgressReporter/ProgressReporterForm.cs
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@ -69,7 +69,7 @@ namespace Nuclex.Windows.Forms {
// Only allow the form to close when the form is ready to close and the
// progression being tracked has also finished.
e.Cancel = (this.state < 2);
e.Cancel = (Thread.VolatileRead(ref this.state) < 2);
}
/// <summary>
@ -99,7 +99,7 @@ namespace Nuclex.Windows.Forms {
if(!progression.Ended)
ShowDialog();
// We're done, unsubscribe from the progression's events
// We're done, unsubscribe from the progression's events again
progression.AsyncProgressUpdated -= this.asyncProgressUpdatedDelegate;
progression.AsyncEnded -= this.asyncEndedDelegate;
@ -172,7 +172,7 @@ namespace Nuclex.Windows.Forms {
int progress = (int)(this.currentProgress * (max - min)) + min;
// Update the control
this.progressBar.Value = Math.Min(Math.Max(progress, min), max);;
this.progressBar.Value = Math.Min(Math.Max(progress, min), max);
// Assigning the value sends PBM_SETPOS to the control which,
// according to MSDN, already causes a redraw!
@ -224,19 +224,18 @@ namespace Nuclex.Windows.Forms {
}
/// <summary>Whether an update of the control state is pending</summary>
private volatile bool progressUpdatePending;
/// <summary>Async result for the invoked control state update method</summary>
private volatile IAsyncResult progressUpdateAsyncResult;
/// <summary>Most recently reported progress of the tracker</summary>
private volatile float currentProgress;
/// <summary>Delegate for the asyncEnded() method</summary>
private EventHandler asyncEndedDelegate;
/// <summary>Delegate for the asyncProgressUpdated() method</summary>
private EventHandler<ProgressUpdateEventArgs> asyncProgressUpdatedDelegate;
/// <summary>Delegate for the progress update method</summary>
private MethodInvoker updateProgressDelegate;
/// <summary>Whether an update of the control state is pending</summary>
private volatile bool progressUpdatePending;
/// <summary>Async result for the invoked control state update method</summary>
private volatile IAsyncResult progressUpdateAsyncResult;
/// <summary>Most recently reported progress of the tracker</summary>
private volatile float currentProgress;
/// <summary>Whether the form can be closed and should be closed</summary>
/// <remarks>
/// 0: Nothing happened yet