private async void StartDoneButton_Click(object sender, RoutedEventArgs e)
{
// This list will hold key / value pairs that will be bound to the datagrid feedback,
// which is the way to make those pairs appear in the data grid during background worker progress updates
ObservableCollection<DateTimeRereadFeedbackTuple> feedbackRows = new ObservableCollection<DateTimeRereadFeedbackTuple>();
this.FeedbackGrid.ItemsSource = feedbackRows;
this.CancelButton.IsEnabled = false;
this.StartDoneButton.Content = "_Done";
this.StartDoneButton.Click -= this.StartDoneButton_Click;
this.StartDoneButton.Click += this.DoneButton_Click;
this.StartDoneButton.IsEnabled = false;
IProgress<DateTimeRereadFeedbackTuple> rereadStatus = new Progress<DateTimeRereadFeedbackTuple>(this.ReportProgress);
DateTimeRereadFeedbackTuple rereadProgress = new DateTimeRereadFeedbackTuple("Pass 1: Examining images and videos...", "Checking if dates/time differ");
rereadStatus.Report(rereadProgress);
await Task.Run(() =>
{
// check to see what date/times need updating
List<ImageRow> filesToAdjust = new List<ImageRow>();
int count = this.database.CurrentlySelectedFileCount;
TimeZoneInfo imageSetTimeZone = this.database.ImageSet.GetTimeZone();
for (int fileIndex = 0; fileIndex < count; ++fileIndex)
{
ImageRow file = this.database.Files[fileIndex];
DateTimeOffset originalDateTime = file.GetDateTime();
string feedbackMessage = String.Empty;
try
{
DateTimeAdjustment dateTimeAdjustment = file.TryReadDateTimeOriginalFromMetadata(this.database.FolderPath, imageSetTimeZone);
if (dateTimeAdjustment == DateTimeAdjustment.None)
{
// couldn't read metadata, so get a candidate date/time from the file
file.SetDateTimeOffsetFromFileInfo(this.database.FolderPath, imageSetTimeZone);
feedbackMessage = "Using file date/time: ";
}
else if ((dateTimeAdjustment & DateTimeAdjustment.PreviousMetadata) == DateTimeAdjustment.PreviousMetadata)
{
feedbackMessage = "Using previous metadata date/time: ";
}
else
{
feedbackMessage = "Using metadata date/time: ";
}
DateTimeOffset rescannedDateTime = file.GetDateTime();
bool updateNeeded = false;
if (rescannedDateTime.Date == originalDateTime.Date)
{
feedbackMessage += "same date, ";
}
else
{
updateNeeded = true;
feedbackMessage += "different date, ";
}
if (rescannedDateTime.TimeOfDay == originalDateTime.TimeOfDay)
{
feedbackMessage += "same time, ";
}
else
{
updateNeeded = true;
feedbackMessage += "different time, ";
}
if (rescannedDateTime.Offset == originalDateTime.Offset)
{
feedbackMessage += "same UTC offset";
}
else
{
updateNeeded = true;
feedbackMessage += "different UTC offset";
}
if (updateNeeded)
{
filesToAdjust.Add(file);
}
}
catch (Exception exception)
{
Debug.Fail(String.Format("Unexpected exception processing '{0}'.", file.FileName), exception.ToString());
feedbackMessage += String.Format(" , skipping due to {0}: {1}.", exception.GetType().FullName, exception.Message);
}
if (fileIndex % Constant.ThrottleValues.SleepForImageRenderInterval == 0)
{
rereadProgress.FileName = file.FileName;
rereadProgress.Message = feedbackMessage;
rereadStatus.Report(new DateTimeRereadFeedbackTuple(file.FileName, feedbackMessage));
Thread.Sleep(Constant.ThrottleValues.RenderingBackoffTime); // Put in a delay every now and then, as otherwise the UI won't update.
}
}
// Pass 2. Update each date as needed
rereadProgress.FileName = String.Empty;
rereadProgress.Message = String.Empty;
rereadStatus.Report(rereadProgress); // A blank separator
rereadProgress.FileName = "Pass 2: Updating date/times";
rereadProgress.Message = String.Format("Updating {0} images and videos...", filesToAdjust.Count);
rereadStatus.Report(rereadProgress);
List<ColumnTuplesWithWhere> imagesToUpdate = new List<ColumnTuplesWithWhere>();
foreach (ImageRow image in filesToAdjust)
{
imagesToUpdate.Add(image.GetDateTimeColumnTuples());
}
database.UpdateFiles(imagesToUpdate); // Write the updates to the database
rereadProgress.FileName = String.Empty;
rereadProgress.Message = "Done";
rereadStatus.Report(rereadProgress);
});
this.StartDoneButton.IsEnabled = true;
}
private void ReportProgress(DateTimeRereadFeedbackTuple progress)
{
ObservableCollection<DateTimeRereadFeedbackTuple> feedbackRows = (ObservableCollection<DateTimeRereadFeedbackTuple>)this.FeedbackGrid.ItemsSource;
feedbackRows.Add(progress);
this.FeedbackGrid.ScrollIntoView(this.FeedbackGrid.Items[this.FeedbackGrid.Items.Count - 1]);
}
