private ImageSource ExtractIcon(NativeShellFolder shellFolder, PIDLIST pidl, int iconSize, GILI iconFlags)
{
using (NativeExtractIcon extractIcon = shellFolder.GetUIObjectOf <IExtractIcon>(pidl).ToNative()) {
string iconFile;
int iconIndex;
GILR iconResultFlags;
if (!extractIcon.GetIconLocation(iconFlags, out iconFile, out iconIndex, out iconResultFlags).GetValueOrDefault())
{
return(null); // TODO return default icon, schedule async icon extraction
}
HICON hicon;
// TODO check cache
/*if (!iconResultFlags.Has(GILR.NOTFILENAME))
* Native.PrivateExtractIcons(iconFile, iconIndex, iconSize, out hicon, LR.LOADFROMFILE);*/
if (!extractIcon.Extract(iconFile, iconIndex, (ushort)iconSize, out hicon) && !iconResultFlags.Has(GILR.NOTFILENAME))
{
Native.PrivateExtractIcons(iconFile, iconIndex, iconSize, out hicon, LR.LOADFROMFILE);
}
if (hicon == IntPtr.Zero)
{
return(null);
}
return(Native.CreateBitmapSourceFromHIcon(hicon));
}
}
internal ShellItem(ShellTree tree, ShellItem parent, PIDLIST pidl, NativeShellFolder shellFolder)
{
_tree = tree;
_parent = parent;
_pidl = pidl;
_shellFolder = shellFolder;
_children = _childrenFiles = _childrenFolders = DummyChildren;
UpdateAttrs(SFGAO.HASSUBFOLDER | SFGAO.FILESYSTEM | SFGAO.FILESYSANCESTOR | SFGAO.FOLDER);
if (!HasSubFolder)
{
_childrenFolders = NoChildren;
}
}
private void ReplaceDummyChildren()
{
if (_children == DummyChildren)
{
var children = new List <ShellItem>();
try {
foreach (PIDLIST childPidl in _shellFolder.EnumObjects(_tree.WindowHandle, SHCONTF.FOLDERS | SHCONTF.NONFOLDERS))
{
NativeShellFolder childShellFolder = _shellFolder.BindToObject <IShellFolder>(childPidl).ToNative();
ShellItem childItem = new ShellItem(_tree, this, childPidl, childShellFolder);
children.Add(childItem);
}
}
catch (Exception e) {
if (e.IsAnyType <FileNotFoundException, Win32Exception>())
{
Log.Error("Failed to enumerate items of folder '{0}'.".Fmt(DisplayName), e);
}
}
finally {
children.Sort(new ShellItemComparer(ParentShellFolder));
_children = new ObservableCollectionEx <ShellItem>();
_childrenFiles = new ObservableCollectionEx <ShellItem>();
_childrenFolders = new ObservableCollectionEx <ShellItem>();
foreach (ShellItem childItem in children)
{
_children.Add(childItem);
if (childItem.IsFolder)
{
_childrenFolders.Add(childItem);
}
else
{
_childrenFiles.Add(childItem);
}
}
}
OnPropertyChanged("Children", "ChildrenUnexpanded",
"ChildrenFiles", "ChildrenFilesUnexpanded",
"ChildrenFolders", "ChildrenFoldersUnexpanded");
}
}
public ImageSource ExtractIcon(NativeShellFolder shellFolder, PIDLIST pidl, SHIL iconSize, GILI iconFlags)
{
return(ExtractIcon(shellFolder, pidl, IconSizeToPixels(iconSize), iconFlags));
}
public ShellItemComparer(NativeShellFolder shellFolder)
{
_shellFolder = shellFolder;
}