private void HookDropTarget()
{
if (dropTargetPassthrough != null)
{
dropTargetPassthrough.Dispose();
dropTargetPassthrough = null;
}
IntPtr ptr = PInvoke.GetProp(Handle, "OleDropTargetInterface");
if (ptr != IntPtr.Zero)
{
object obj = Marshal.GetObjectForIUnknown(ptr);
_IDropTarget passthrough = obj as _IDropTarget;
if (passthrough != null)
{
PInvoke.RevokeDragDrop(Handle);
dropTargetPassthrough = new DropTargetPassthrough(passthrough, this);
PInvoke.RegisterDragDrop(Handle, dropTargetPassthrough);
}
else
{
Marshal.ReleaseComObject(obj);
}
}
}
public void Dispose()
{
if (DropTarget != null)
{
Marshal.ReleaseComObject(DropTarget);
DropTarget = null;
}
}
public void Dispose()
{
if (passthrough != null)
{
Marshal.ReleaseComObject(passthrough);
passthrough = null;
}
}
public void Dispose() {
if(DropTarget != null) {
Marshal.ReleaseComObject(DropTarget);
DropTarget = null;
}
}
public int DragDrop(System.Runtime.InteropServices.ComTypes.IDataObject pDataObj, int grfKeyState, BandObjectLib.POINT pt, ref DragDropEffects pdwEffect)
{
try {
if (this.DragFileOver != null)
{
DragEventArgs e = new DragEventArgs(null, grfKeyState, pt.x, pt.y, DragDropEffects.Move | DragDropEffects.Copy | DragDropEffects.Scroll, pdwEffect);
this.DragFileOver(null, e);
pdwEffect = e.Effect;
}
else
{
pdwEffect = DragDropEffects.Copy;
}
if (pdwEffect != DragDropEffects.None)
{
if (this.DragFileDrop != null)
{
IntPtr ptr;
byte[] buffer;
switch (this.DragFileDrop(out ptr, out buffer))
{
case -1:
return(0);
case 0: {
IShellFolder ppv = null;
object obj2 = null;
Guid riid = ExplorerGUIDs.IID_IShellFolder;
Guid guid2 = ExplorerGUIDs.IID_IDropTarget;
using (IDLWrapper wrapper = new IDLWrapper(buffer)) {
if (wrapper.Available && wrapper.IsDropTarget)
{
try {
IntPtr ptr2;
if (PInvoke.SHBindToParent(wrapper.PIDL, riid, out ppv, out ptr2) == 0)
{
uint rgfReserved = 0;
IntPtr[] apidl = new IntPtr[] { ptr2 };
if (ppv.GetUIObjectOf(ptr, 1, apidl, ref guid2, ref rgfReserved, out obj2) == 0)
{
_IDropTarget target = obj2 as _IDropTarget;
if (target != null)
{
DragDropEffects effects = pdwEffect;
if (target.DragEnter(pDataObj, this.iLastKeyState, pt, ref effects) == 0)
{
effects = pdwEffect;
if (target.DragOver(this.iLastKeyState, pt, ref effects) == 0)
{
if ((this.iLastKeyState & 2) != 0)
{
pdwEffect = DragDropEffects.Link | DragDropEffects.Move | DragDropEffects.Copy;
}
return(target.DragDrop(pDataObj, this.iLastKeyState, pt, ref pdwEffect));
}
}
}
}
}
}
catch {
}
finally {
if (ppv != null)
{
Marshal.ReleaseComObject(ppv);
}
if (obj2 != null)
{
Marshal.ReleaseComObject(obj2);
}
if (this.DragDropEnd != null)
{
this.DragDropEnd(this, EventArgs.Empty);
}
}
}
}
return(0);
}
}
}
FORMATETC format = new FORMATETC();
format.cfFormat = 15;
format.ptd = IntPtr.Zero;
format.dwAspect = DVASPECT.DVASPECT_CONTENT;
format.lindex = -1;
format.tymed = TYMED.TYMED_HGLOBAL;
STGMEDIUM medium = new STGMEDIUM();
try {
pDataObj.GetData(ref format, out medium);
PInvoke.SendMessage(this.hwnd, 0x233, medium.unionmember, IntPtr.Zero);
}
catch {
}
finally {
PInvoke.ReleaseStgMedium(ref medium);
}
}
}
finally {
if (pDataObj != null)
{
Marshal.FinalReleaseComObject(pDataObj);
}
}
return(0);
}
public static extern int RegisterDragDrop(IntPtr hwnd, _IDropTarget pDropTarget);
public static extern int RegisterDragDrop(IntPtr hwnd, _IDropTarget pDropTarget);
public DropTargetPassthrough(_IDropTarget passthrough, ExtendedListViewCommon parent)
{
this.passthrough = passthrough;
this.parent = parent;
}
public void Dispose() {
if(passthrough != null) {
Marshal.ReleaseComObject(passthrough);
passthrough = null;
}
}
public DropTargetPassthrough(_IDropTarget passthrough, ExtendedListViewCommon parent) {
this.passthrough = passthrough;
this.parent = parent;
}
