protected override void ValueToKey(object value, out string key, out string fastKey, out bool delayLoading)
{
delayLoading = false;
key = "";
fastKey = "";
if (value is IFileSystemInfoExA)
{
IFileSystemInfoExA entry = value as IFileSystemInfoExA;
if (value is IFileInfoExA)
{
fastKey = PathEx.GetExtension(entry.Name);
if (imageFilter.IndexOf(fastKey) == -1)
{
key = entry.ParseName;
}
else
{
key = fastKey;
}
delayLoading = key != fastKey;
}
else //IDirectoryInfoExA
{
IDirectoryInfoExA dirEntry = entry as IDirectoryInfoExA;
if (dirEntry.IsFileBasedFS)
{
fastKey = key = PathEx.GetExtension(entry.Name);
}
else
{
fastKey = tempPath;
key = fastKey;
if (IsSpecialFolder(entry.ParseName))
{
key = entry.ParseName;
delayLoading = true;
}
}
}
}
}
//Icon (e.g. exe)
private void PollIconCallback(object state)
{
thumbnailInfo input = state as thumbnailInfo;
IFileSystemInfoExA entry = input.entry;
if (input.roll != currentRoll)
{
Debug.Write(entry.Name + " discarded."); return;
}
getPathLock.TryEnterWriteLock(-1);
string fileName = "";
try { fileName = entry.FullName; }
finally { getPathLock.ExitWriteLock(); }
WriteableBitmap writeBitmap = input.bitmap;
IconSize size = input.iconsize;
if (input.roll != currentRoll)
{
Debug.Write(entry.Name + " discarded."); return;
}
Bitmap origBitmap = KeyToBitmap(fileName, size);
Bitmap inputBitmap = origBitmap;
if (size == IconSize.jumbo || size == IconSize.thumbnail)
{
inputBitmap = resizeJumbo(origBitmap, IconSizeToSize(size), 5);
}
else
{
inputBitmap = resizeImage(origBitmap, IconSizeToSize(size), 0);
}
BitmapSource inputBitmapSource = loadBitmap(inputBitmap);
origBitmap.Dispose();
inputBitmap.Dispose();
copyBitmap(inputBitmapSource, writeBitmap, true, 0);
}
//Thumbnail (for images)
private void PollThumbnailCallback(object state)
{
//Non UIThread
thumbnailInfo input = state as thumbnailInfo;
IFileSystemInfoExA entry = input.entry;
if (input.roll != currentRoll)
{
Debug.Write(entry.Name + " discarded."); return;
}
getPathLock.TryEnterWriteLock(-1);
string fileName = "";
try { fileName = entry.FullName; }
finally { getPathLock.ExitWriteLock(); }
WriteableBitmap writeBitmap = input.bitmap;
IconSize size = input.iconsize;
try
{
if (input.roll != currentRoll)
{
Debug.Write(entry.Name + " discarded."); return;
}
Bitmap origBitmap = new Bitmap(fileName);
Bitmap inputBitmap = resizeImage(origBitmap, IconSizeToSize(size), 5);
BitmapSource inputBitmapSource = loadBitmap(inputBitmap);
origBitmap.Dispose();
inputBitmap.Dispose();
copyBitmap(inputBitmapSource, writeBitmap, true, 0);
}
catch (Exception ex) { Debug.WriteLine("PollThumbnailCallback " + ex.Message + "(" + fileName + ")"); }
}