public static IPreviewHandler InitalizePreviewHandler(FileInfoEx file)
{
IPreviewHandler retVal = null;
PreviewerInfo previewer = getPreviewer(file.FullName);
if (previewer != null)
{
bool isInitialized = false;
Type a = Type.GetTypeFromCLSID(previewer.CLSID, true);
object o = Activator.CreateInstance(a);
IInitializeWithFile fileInit = o as IInitializeWithFile;
IInitializeWithStream streamInit = o as IInitializeWithStream;
if (fileInit != null)
{
fileInit.Initialize(file.FullName, 0);
isInitialized = true;
}
else if (streamInit != null)
{
FileStreamEx stream = file.OpenRead();
streamInit.Initialize((IStream)stream, 0);
isInitialized = true;
}
if (isInitialized)
{
retVal = o as IPreviewHandler;
}
}
return(retVal);
}
public void AttachPreview(IntPtr handler, string fileName, Rect viewRect)
{
Release();
string CLSID = "8895b1c6-b41f-4c1c-a562-0d564250836f";
Guid g = new Guid(CLSID);
string[] exts = fileName.Split('.');
string ext = exts[exts.Length - 1];
using (RegistryKey hk = Registry.ClassesRoot.OpenSubKey(string.Format(@".{0}\ShellEx\{1:B}", ext, g)))
{
if (hk != null)
{
g = new Guid(hk.GetValue("").ToString());
Type type = Type.GetTypeFromCLSID(g, true);
object comObj = Activator.CreateInstance(type);
IInitializeWithFile fileInit = comObj as IInitializeWithFile;
IInitializeWithStream streamInit = comObj as IInitializeWithStream;
bool isInitialized = false;
try
{
if (fileInit != null)
{
fileInit.Initialize(fileName, 0);
isInitialized = true;
}
else if (streamInit != null)
{
stream = new COMStream(File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.Read));
streamInit.Initialize((IStream)stream, 0);
isInitialized = true;
}
}
catch (Exception ex)
{
Logging.Log.Warn("Unable to initialize IPreviewHandler", ex);
}
pHandler = comObj as IPreviewHandler;
if (isInitialized && pHandler != null)
{
RECT r = new RECT(viewRect);
pHandler.SetWindow(handler, ref r);
pHandler.SetRect(ref r);
pHandler.DoPreview();
}
else
{
Marshal.FinalReleaseComObject(comObj);
Release();
}
}
}
}
public static void AttachPreview(IntPtr handler, FileInfoEx file, Rectangle viewRect)
{
if (pHandler != null)
{
pHandler.Unload();
}
string fileName = file.FullName;
string CLSID = "8895b1c6-b41f-4c1c-a562-0d564250836f";
Guid g = new Guid(CLSID);
string[] exts = fileName.Split('.');
string ext = exts[exts.Length - 1];
using (RegistryKey hk = Registry.ClassesRoot.OpenSubKey(string.Format(@".{0}\ShellEx\{1:B}", ext, g)))
{
if (hk != null)
{
g = new Guid(hk.GetValue("").ToString());
Type a = Type.GetTypeFromCLSID(g, true);
object o = Activator.CreateInstance(a);
IInitializeWithFile fileInit = o as IInitializeWithFile;
IInitializeWithStream streamInit = o as IInitializeWithStream;
bool isInitialized = false;
if (fileInit != null)
{
fileInit.Initialize(fileName, 0);
isInitialized = true;
}
else if (streamInit != null)
{
FileStreamEx stream = file.OpenRead();
//COMStream stream = new COMStream(File.Open(fileName, FileMode.Open));
streamInit.Initialize((IStream)streamInit, 0);
isInitialized = true;
}
if (isInitialized)
{
pHandler = o as IPreviewHandler;
if (pHandler != null)
{
ShellAPI.RECT r = new ShellAPI.RECT(viewRect);
pHandler.SetWindow(handler, ref r);
pHandler.SetRect(ref r);
pHandler.DoPreview();
}
}
}
}
}
