private void LoadVolume(IBackgroundTaskContext context)
{
try
{
ProgressTask mainTask = new ProgressTask();
mainTask.AddSubTask("BUILD", 90);
mainTask.AddSubTask("LAYOUT", 10);
context.ReportProgress(new BackgroundTaskProgress(mainTask.IntPercent, string.Format(SR.MessageInitializingMpr, mainTask.Progress)));
BackgroundTaskParams @params = (BackgroundTaskParams)context.UserState;
Volume volume = Volume.Create(@params.Frames,
delegate(int i, int count)
{
if (context.CancelRequested)
{
throw new BackgroundTaskCancelledException();
}
if (i == 0)
{
mainTask["BUILD"].AddSubTask("", count);
}
mainTask["BUILD"][""].Increment();
string message = string.Format(SR.MessageBuildingMprVolumeProgress, mainTask.Progress, i + 1, count, mainTask["BUILD"].Progress);
context.ReportProgress(new BackgroundTaskProgress(mainTask.IntPercent, message));
});
mainTask["BUILD"].MarkComplete();
context.ReportProgress(new BackgroundTaskProgress(mainTask.IntPercent, string.Format(SR.MessagePerformingMprWorkspaceLayout, mainTask.Progress)));
//call layout here b/c it could take a while
@params.SynchronizationContext.Send(delegate
{
_viewer = new MprViewerComponent(volume);
_viewer.Layout();
}, null);
mainTask["LAYOUT"].MarkComplete();
context.ReportProgress(new BackgroundTaskProgress(mainTask.IntPercent, string.Format(SR.MessageDone, mainTask.Progress)));
context.Complete();
}
catch (BackgroundTaskCancelledException)
{
context.Cancel();
}
catch (Exception ex)
{
context.Error(ex);
}
}
public void Dispose()
{
if (_imageSets != null)
{
foreach (IImageSet imageSet in _imageSets)
{
imageSet.Dispose();
}
_imageSets.Clear();
_imageSets = null;
}
_mprViewer = null;
}
public void LaunchMpr()
{
Exception exception = null;
IPresentationImage currentImage = this.Context.Viewer.SelectedPresentationImage;
if (currentImage == null)
{
return;
}
// gather the source frames which MPR will operate on. exceptions are reported.
BackgroundTaskParams @params;
try
{
@params = new BackgroundTaskParams(FilterSourceFrames(currentImage.ParentDisplaySet, currentImage));
}
catch (Exception ex)
{
ExceptionHandler.Report(ex, SR.ExceptionMprLoadFailure, base.Context.DesktopWindow);
return;
}
// execute the task to create an MPR component. exceptions (either thrown or passed via task) are reported, but any created component must be disposed
BackgroundTask task = new BackgroundTask(LoadVolume, true, @params);
task.Terminated += (sender, e) => exception = e.Exception;
try
{
ProgressDialog.Show(task, base.Context.DesktopWindow, true, ProgressBarStyle.Blocks);
}
catch (Exception ex)
{
exception = ex;
if (_viewer != null)
{
_viewer.Dispose();
_viewer = null;
}
}
finally
{
task.Dispose();
}
if (exception != null)
{
ExceptionHandler.Report(exception, SR.ExceptionMprLoadFailure, base.Context.DesktopWindow);
return;
}
// launch the created MPR component as a workspace. any exceptions here are just reported.
try
{
LaunchImageViewerArgs args = new LaunchImageViewerArgs(ViewerLaunchSettings.WindowBehaviour);
args.Title = _viewer.Title;
MprViewerComponent.Launch(_viewer, args);
}
catch (Exception ex)
{
ExceptionHandler.Report(ex, SR.ExceptionMprLoadFailure, base.Context.DesktopWindow);
}
finally
{
_viewer = null;
}
}
public BasicMprWorkspace(MprViewerComponent mprViewer)
{
_mprViewer = mprViewer;
}