public void PrepareOCR(string file)
{
if (updateWorker != null && !updateWorker.IsCompleted)
{
updateWorkerCTS.Cancel();
try {
updateWorker.Wait();
} catch {}
updateWorker = null;
}
int pageFirst = 0, pageLast = 0;
if (Path.GetExtension(file).ToLower() == ".pdf")
{
int cnt = (int)OCR.GetPDFPagesCount(file);
if (cnt > 1)
{
var wnd_range = new PageRangeWindow(cnt);
wnd_range.ShowDialog(wnd);
if (wnd_range.Cancelled)
{
return;
}
pageFirst = wnd_range.PageFirst;
pageLast = wnd_range.PageLast;
}
}
LoadingWindow wnd_waiter = new LoadingWindow("Rozpoznawanie");
updateWorkerCTS = new CancellationTokenSource();
updateWorkerCT = updateWorkerCTS.Token;
updateWorker = Task.Factory.StartNew(() => {
wnd_waiter.SetStatus("Przygotowywanie");
OCRStatus status = new OCRStatus();
status.OCRCancellationToken = updateWorkerCT;
status.PageCurrentChanged += (sender, e) => {
wnd_waiter.SetStatus($"Rozpoznawanie strony {status.PageCurrent} z {status.PageCount}");
int prc = (int)(100 * status.PageCurrent / status.PageCount);
if (prc > 100)
{
prc = 100;
}
wnd_waiter.SetPercentage(prc);
};
OCRResult result = OCR.GetTextFromFileAsync(file, this.Engine, status, pageFirst, pageLast).Result;
if (result != null)
{
wnd.SetResult(file, result);
}
else
if (status.Error != OctarineError.CancellationRequested)
{
wnd.ShowError(status.Error, status.ErrorMessage);
}
wnd_waiter.Close();
updateWorker = null;
}, updateWorkerCT);
wnd_waiter.ShowDialog(wnd);
if (updateWorker != null && !updateWorker.IsCompleted)
{
updateWorkerCTS.Cancel();
try {
updateWorker.Wait();
} catch {}
updateWorker = null;
}
}
public bool OpenDownloader(string[] sources, string[] destinations, Form window = null, string label = "Pobieranie")
{
if (window == null)
{
window = wnd;
}
bool cancellationProcessed = false;
var l = new LoadingWindow(label);
l.SetStatus("Inicjowanie...");
bool cancelled = true;
var cts = new CancellationTokenSource();
var ct = cts.Token;
Task.Factory.StartNew(() => {
int i = 0;
using (var client = new WebClient()) {
client.DownloadProgressChanged += (sender, e) => {
int percentage = i * 100;
percentage += e.ProgressPercentage;
percentage = percentage / sources.Count();
l.SetPercentage(percentage);
l.SetStatus($"Pobieranie pliku {i+1} z {sources.Count()}: {e.BytesReceived/1048576} / {e.TotalBytesToReceive/1048576} MB");
if (ct.IsCancellationRequested)
{
client.CancelAsync();
cancellationProcessed = true;
}
};
client.DownloadFileCompleted += (sender, e) => {
i++;
if (i < sources.Count())
{
client.DownloadFileAsync(new Uri(sources[i]), destinations[i]);
}
else
{
cancelled = false;
l.Close();
}
};
client.DownloadFileAsync(new Uri(sources[i]), destinations[i]);
}
}, ct);
l.ShowDialog(window);
if (cancelled)
{
cts.Cancel();
while (cancellationProcessed == false)
{
Thread.Sleep(100);
}
for (int i = 0; i < destinations.Count(); ++i)
{
try {
if (File.Exists(destinations[i]))
{
File.Delete(destinations[i]);
}
} catch {}
}
}
return(!cancelled);
}
