public Image GetImage(int minX, int minY)
{
Image image = null;
while (image == null) {
try {
if (photos == null || index >= photos.PhotoCollection.Length) {
if (photos == null || photos.TotalPhotos == 0 || photos.PageNumber >= photos.TotalPages - 1) {
page = 0;
}
else {
++page;
}
PhotoSearchOptions op = new PhotoSearchOptions();
op.SortOrder = PhotoSearchSortOrder.DatePostedDesc;
op.Page = page;
op.PerPage = 100;
if (!String.IsNullOrEmpty(tags))
op.Tags = tags;
op.TagMode = tagsAndLogic ? TagMode.AllTags : TagMode.AnyTag;
if (!String.IsNullOrEmpty(userId))
op.UserId = userId;
if (!String.IsNullOrEmpty(text))
op.Text = text;
if (String.IsNullOrEmpty(tags) && String.IsNullOrEmpty(userId) && String.IsNullOrEmpty(text)) {
op.MinUploadDate = DateTime.Now - TimeSpan.FromDays(10);
op.MaxUploadDate = DateTime.Now - TimeSpan.FromHours(1);
}
photos = f.PhotosSearch(op);
if (photos.TotalPhotos == 0) {
if (tagsAndLogic)
tagsAndLogic = false;
else if (!String.IsNullOrEmpty(tags))
tags = null;
else if (!String.IsNullOrEmpty(text))
text = null;
else if (!String.IsNullOrEmpty(userId))
userId = null;
else
throw new ImageSourceFailedException("Flickr search returned no images");
continue;
}
index = 0;
}
// choose the smallest photo larger than the requested size
Photo photo = photos.PhotoCollection[index++];
FlickrNet.Size[] sizes = f.PhotosGetSizes(photo.PhotoId).SizeCollection;
String url = null;
for (int i = sizes.Length - 1; i >= 0; --i) {
FlickrNet.Size s = sizes[i];
if (!crop && s.Label == "Square")
continue;
if (s.Width >= minX && s.Height >= minY)
url = s.Source;
}
if (url == null)
continue; // nothing large enough
image = Image.FromStream(f.DownloadPicture(url));
}
catch (Exception ex) {
if (++errorCount <= MaxErrorCount) {
Log.Instance.Write(string.Format("Failure {0} of {1} loading Flickr photo(s)", errorCount, MaxErrorCount), ex);
// try next photo
}
else {
throw new ImageSourceFailedException("Maximum error count reached, failing Flickr image source", ex);
}
}
}
errorCount = 0;
return image;
}
void Initialize()
{
flowView = new OpenFlowView (UIScreen.MainScreen.Bounds, this);
View = flowView;
using (var alertView = new UIAlertView ("OpenFlowSharp Demo Data Source",
"Would you like to download images from Flickr or use 30 sample images included with this project?",
null, "Flickr",
"Samples (all at once)",
"Samples (using threads)")){
alertView.Dismissed += delegate(object sender, UIButtonEventArgs e) {
switch (e.ButtonIndex){
// Flickr
case 0:
flickr = new Flickr (apiKey, sharedSecret);
tasks.Enqueue (delegate {
try {
Network = true;
photos = flickr.InterestingnessGetList ();
Network = false;
InvokeOnMainThread (delegate {
flowView.NumberOfImages = photos.Count;
});
} catch {
InvokeOnMainThread (delegate {
using (var alert = new UIAlertView ("Error", "While accessing Flickr", null, "Ok")){
alert.Show ();
}
});
}
});
break;
// Load images on demand on a worker thread
case 2:
flowView.NumberOfImages = 30;
break;
// Sync case, load all images at startup
case 1:
LoadAllImages ();
return;
}
// Start our thread queue system
new Thread (Worker).Start ();
signal.Set ();
};
alertView.Show ();
}
}