public PictureDownload GetPicture(Picture pic, bool queueForDownload)
{
//check if the requested image exists, if it does then return
//if image already has a local path then use it (just what we need for local provider where images are not stored in cache).
var picturePath = string.IsNullOrEmpty(pic.LocalPath) ? pic.CalculateLocalPath(SaveFolder) : pic.LocalPath;
pic.LocalPath = picturePath;
if (pic.IsGood)
{
//if the wallpaper image already exists, and passes our 0 size check then fire the event
return(new PictureDownload(pic));
}
var fi = new FileInfo(picturePath);
//for files that do not exist "Delete" does nothing per MSDN docs
try { fi.Delete(); }
catch (Exception ex)
{
Log.Logger.Write(string.Format("Error deleting 0 byte file '{0}' while prepareing to redownload it. Exception details: {1}", fi.FullName, ex.ToString()), Log.LoggerLevels.Errors);
}
PictureDownload pd = new PictureDownload(pic);
if (queueForDownload)
{
//add file to Queue
QueuePicture(pd);
}
return(pd);
}
void p_PictureDownloadProgressChanged(PictureDownload sender)
{
if (PictureDownloadProgressChanged != null)
{
PictureDownloadProgressChanged(sender);
}
}
void p_PictureDownloaded(PictureDownload sender)
{
if (PictureDownloaded != null)
{
PictureDownloaded(sender);
}
}
void p_PictureDownloading(PictureDownload sender)
{
if (PictureDownloading != null)
{
PictureDownloading(sender);
}
}
void Current_PictureAddedToQueue(PictureDownload sender)
{
if (pictureStatusList.ContainsKey(sender)) return;
this.Invoke((Action)delegate
{
PictureStatus ps = new PictureStatus();
flpDownloads.Controls.Add(ps);
ps.Dock = DockStyle.Top;
pictureStatusList.Add(sender, ps);
ps.SetPicture(sender);
});
}
void Current_PictureRemovedFromQueue(PictureDownload sender)
{
lock (pictureStatusList)
{
if (!pictureStatusList.ContainsKey(sender)) return;
this.Invoke((Action)delegate
{
PictureStatus ps = pictureStatusList[sender];
ps.UnhookEvents();
flpDownloads.Controls.Remove(ps);
pictureStatusList.Remove(sender);
});
}
}
public void SetPicture(PictureDownload pd)
{
this.CurrentPicture = pd;
CurrentPicture.PictureDownloadStatusChanged += pd_PictureDownloadStatusChanged;
CurrentPicture.PictureDownloadProgressChanged += pd_PictureDownloadProgressChanged;
this.Invoke((Action)delegate
{
if (!lblFileName.IsDisposed)
{
lblFileName.Text = Path.GetFileName(pd.Picture.LocalPath);
SetStatus(pd.Status);
}
});
}
public void RemovePictureFromQueue(PictureDownload p)
{
if (!_downloadQueue.Contains(p))
{
return;
}
//call cancel, just in case
p.CancelDownload();
_downloadQueue.Remove(p);
//call removed event
if (PictureRemovedFromQueue != null)
{
PictureRemovedFromQueue(p);
}
}
private void DownloadSelectedPictures(List <Picture> toProcess)
{
//validate that there are actually pictures to be processed (search may return 0 results, or very few results)
if (toProcess.Count > 0)
{
//download the new pictures, wait for them to all finish
ManualResetEvent[] manualEvents = new ManualResetEvent[toProcess.Count];
// Queue the work items that create and write to the files.
for (int i = 0; i < toProcess.Count; i++)
{
manualEvents[i] = new ManualResetEvent(false);
ThreadPool.QueueUserWorkItem(new WaitCallback(delegate(object state)
{
object[] states = (object[])state;
ManualResetEvent mre = (ManualResetEvent)states[0];
Picture p = (Picture)states[1];
PictureDownload pd = DownloadManager.Current.GetPicture(p, false);
//hook events and set mre in event
PictureDownload.PictureDownloadEvent pdEvent = new PictureDownload.PictureDownloadEvent(
delegate(PictureDownload t)
{
mre.Set();
});
//on success or failure make sure to set mre
pd.PictureDownloaded += pdEvent;
pd.PictureDownloadingAborted += pdEvent;
DownloadManager.Current.QueuePicture(pd);
}), new object[] { manualEvents[i], toProcess[i] });
}
//wait for all items to finish
//3 minute timeout
WaitHandle.WaitAll(manualEvents, 3 * 60 * 1000);
CurrentPictures.AddRange(toProcess);
}
}
public void QueuePicture(PictureDownload p)
{
if (_downloadQueue.Contains(p.Picture.Url))
{
return;
}
//add to the queue
_downloadQueue.Add(p);
//hook events
p.PictureDownloaded += p_PictureDownloaded;
p.PictureDownloading += p_PictureDownloading;
p.PictureDownloadingAborted += p_PictureDownloadingAborted;
p.PictureDownloadProgressChanged += p_PictureDownloadProgressChanged;
//call picture added event
if (PictureAddedToQueue != null)
{
PictureAddedToQueue(p);
}
}
/// <summary>
/// Retrieves a random picture from the picture list
/// </summary>
/// <param name="pl">Picture list from which to retrieve pictures</param>
/// <param name="saveFolder">Location where to save the picture</param>
/// <param name="currentPicture">(optional) the current picture, to avoid repeates. Pass null if not needed or this is the first picture.</param>
public PictureDownload GetPicture(PictureList pl, Picture currentPicture, bool queueForDownload)
{
Picture pic = null;
if (pl == null || pl.Pictures.Count == 0)
{
return(null);
}
//pick the next picture at random
// only "non-random" bit is that we make sure that the next random picture isn't the same as our current one
var index = 0;
do
{
index = rnd.Next(pl.Pictures.Count);
} while (currentPicture != null && currentPicture.Url == pl.Pictures[index].Url);
pic = pl.Pictures[index];
//download current picture first
PictureDownload pd = GetPicture(pic, queueForDownload);
return(pd);
}
void pd_PictureDownloaded(PictureDownload sender)
{
pb1.SizeMode = PictureBoxSizeMode.Zoom;
pb1.ImageLocation = sender.Picture.LocalPath;
}
void p_PictureDownloadProgressChanged(PictureDownload sender)
{
if (PictureDownloadProgressChanged != null) PictureDownloadProgressChanged(sender);
}
void p_PictureDownloadingAborted(PictureDownload sender)
{
if (PictureDownloadingAborted != null) PictureDownloadingAborted(sender);
}
void p_PictureDownloading(PictureDownload sender)
{
if (PictureDownloading != null) PictureDownloading(sender);
}
void p_PictureDownloaded(PictureDownload sender)
{
if (PictureDownloaded != null) PictureDownloaded(sender);
}
public void RemovePictureFromQueue(PictureDownload p)
{
if (!_downloadQueue.Contains(p)) return;
//call cancel, just in case
p.CancelDownload();
_downloadQueue.Remove(p);
//call removed event
if (PictureRemovedFromQueue != null) PictureRemovedFromQueue(p);
}
public void QueuePicture(PictureDownload p)
{
if (_downloadQueue.Contains(p.Picture.Url)) return;
//add to the queue
_downloadQueue.Add(p);
//hook events
p.PictureDownloaded += p_PictureDownloaded;
p.PictureDownloading += p_PictureDownloading;
p.PictureDownloadingAborted += p_PictureDownloadingAborted;
p.PictureDownloadProgressChanged += p_PictureDownloadProgressChanged;
//call picture added event
if (PictureAddedToQueue != null) PictureAddedToQueue(p);
}
public PictureDownload GetPicture(Picture pic, bool queueForDownload)
{
//check if the requested image exists, if it does then return
//if image already has a local path then use it (just what we need for local provider where images are not stored in cache).
var picturePath = string.IsNullOrEmpty(pic.LocalPath) ? pic.CalculateLocalPath(SaveFolder) : pic.LocalPath;
pic.LocalPath = picturePath;
if (pic.IsGood)
{
//if the wallpaper image already exists, and passes our 0 size check then fire the event
return new PictureDownload(pic);
}
var fi = new FileInfo(picturePath);
//for files that do not exist "Delete" does nothing per MSDN docs
try { fi.Delete(); }
catch (Exception ex)
{
Log.Logger.Write(string.Format("Error deleting 0 byte file '{0}' while prepareing to redownload it. Exception details: {1}", fi.FullName, ex.ToString()), Log.LoggerLevels.Errors);
}
PictureDownload pd = new PictureDownload(pic);
if (queueForDownload)
{
//add file to Queue
QueuePicture(pd);
}
return pd;
}
void pd_PictureDownloadStatusChanged(PictureDownload sender)
{
this.Invoke((Action)delegate
{
SetStatus(sender.Status);
});
}
void pd_PictureDownloadProgressChanged(PictureDownload sender)
{
this.Invoke((Action)delegate
{
if(!pbDownloadProgress.IsDisposed)
pbDownloadProgress.Value = sender.DownloadProgress;
});
}
