Well, for those of you still watching this show (!) and
just in case anyone comes along in the future with the
same question, I attach below a small working example
which will accept one or more files dropped onto its
Window. It doesn't do anything with the files, bar pull
their names from the relevant data structure, but that's
up to the specific application.
Many thanks to Roger for the critical info to get this
working and to Alex for asking the question which started
it off.
TJG
<code>
import os, sys
import win32gui
import win32con
import pythoncom
import win32com.server.policy
from win32com.shell import shell, shellcon
# clsid generated by pythoncom.CreateGuid ()
CLSID = '{89DD545A-2C83-4103-AFE3-6CEB7FF5ECA4}'
PROGID = "Tim.DropTarget"
DESC = "Drop target handler for Tim"
class DropTarget (win32com.server.policy.DesignatedWrapPolicy):
_reg_clsid_ = CLSID
_reg_progid_ = PROGID
_reg_desc_ = DESC
_public_methods_ = ['DragEnter', 'DragOver', 'DragLeave', 'Drop']
_com_interfaces_ = [pythoncom.IID_IDropTarget]
def __init__ (self, hWnd):
self._wrap_ (self)
self.hWnd = hWnd
def DragEnter (self, data_object, key_state, point, effect):
if data_object.QueryGetData ((15, None, 1, -1, 1)):
return shellcon.DROPEFFECT_COPY
else:
return shellcon.DROPEFFECT_NONE
def DragOver (self, key_state, point, effect):
pass
def DragLeave (self):
pass
def Drop (self, data_object, key_state, point, effect):
data = data_object.GetData ((15, None, 1, -1, 1))
n_files = shell.DragQueryFileW (data.data_handle, -1)
filenames = [
shell.DragQueryFileW (data.data_handle, n_file) \
for n_file in range (n_files)
]
def create_window ():
def OnDestroy (hwnd, msg, wparam, lparam):
win32gui.PostQuitMessage (0)
wc = win32gui.WNDCLASS ()
hinst = win32gui.GetModuleHandle(None)
wc.lpszClassName = "DragDrop"
wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW;
wc.hCursor = win32gui.LoadCursor (0, win32con.IDC_ARROW)
wc.hbrBackground = win32con.COLOR_WINDOW
wc.lpfnWndProc = {win32con.WM_DESTROY : OnDestroy}
classAtom = win32gui.RegisterClass (wc)
style = win32con.WS_VISIBLE | win32con.WS_OVERLAPPED \
| win32con.WS_SYSMENU
return win32gui.CreateWindow (
classAtom,
"Drag & Drop demo",
style,
0, 0, 100, 100,
0, 0, hinst, None
)
if __name__ == '__main__':
pythoncom.OleInitialize ()
hWnd = create_window ()
drop_target = DropTarget (hWnd)
pythoncom.RegisterDragDrop (
hWnd,
pythoncom.WrapObject (
drop_target,
pythoncom.IID_IDropTarget,
pythoncom.IID_IDropTarget
)
)
win32gui.PumpMessages ()
</code>
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