Thanks Christian.
I've tried the following code:
################
import Tkinter
root = Tkinter.Tk()
root.title("DICOM Opener")
root.tk.eval('lappend auto_path {K:/Python27/Lib/site-packages/tkdnd2.6}')
root.tk.eval('package require tkdnd')
################
But I get the following traceback:
################
Traceback (most recent call last):
File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py",
line 1397, in <module>
debugger.run(setup['file'], None, None)
File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py",
line 1090, in run
pydev_imports.execfile(file, globals, locals) #execute the script
File "K:\PROGRAMMING\mripy\dicom_opener.py", line 7, in <module>
root.tk.eval('package require tkdnd')
_tkinter.TclError: couldn't load library
"K:/Python27/Lib/tkdnd2.6/tkdnd26.dll": invalid argument
################
Is "invalid argument" as generic as it sounds, or does it mean something
specific in this case? Is Tcl expecting an additional argument in the 'package
require' line?
I assume the append auto path line is correct as it seems to have found the DLL
(presumably from pkgIndex.tcl).
Apologies for any disclaimers that pad out this message - it's a work email
account and they get added after I hit "send".
All the best,
Rob
-----Original Message-----
From: Python-list
[mailto:python-list-bounces+robert.flintham=uhb.nhs...@python.org] On Behalf Of
Christian Gollwitzer
Sent: 29 April 2013 21:38
To: python-list@python.org
Subject: Re: Drag and drop in Windows
Hi Robert,
Am 29.04.13 12:25, schrieb Robert Flintham:
> I've found this (TkDND):
>
> http://wiki.tcl.tk/2768
> But I don't know how to implement this in Python. The Windows binary > for
> it comes as a set of ".tcl" files and a single ".dll" file.
> 2.direct implementation of the Tcl file [tk.eval('source ...')], but I >
> don't reallu understand what's going on with this - can you only execute >
> a "main" bit of Tcl files rather than implementing individual functions?
I can only comment on the Tcl side, since I'm not an expert in the Tkinter
coupling mechanism. TkDND is indeed the way to go if you want native
drag'n'drop support. The first step would indeed be to load the package into
the Tcl interpreter. You need to:
1) Create a folder for the packages, put the files in a subfolder Typically,
this is something like lib/tkdnd, and at that level there must be the
"pkgIndex.tcl" file
2) Append the lib/ folder to the auto path tk.eval('lappend auto_path
{mypath/lib}') (the braces are Tcl's quoting mechanism)
3) load the package
tk.eval('package require tkdnd')
Then, you need to "register the target", i.e. declare a widget that it accepts
files. Here, you need the Tk path name of the widget, which is retrieved by
__str__:
tk.eval('tkdnd::drop_target register ' + yourwidget +' *')
Then, if you drop something, the widget recieves a virtual event
<<Drop:DND_Files>> . Now this is tricky, I don't know how to bind to that
event. Following the tutorial for Tcl on http://wiki.tcl.tk/36708, I suppose
something like
yourwidget.bind("<<Drop::DND_Files>>", filesdropped)
should in principle work, but how to get the data out of it? It is stuffed into
the %D bind substitution. Usual events store the MouseWheel distance in this
field; so maybe you can get it from the field event.delta. I can't test it now,
but I am a bit skeptical whether this works with the guts of TkInter. If not,
you'd need to do some more forwarding from the Tcl side.
Christian
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