appJar/lib/TkDND_wrapper.py
# http://stackoverflow.com/questions/14267900/python-drag-and-drop-explorer-files-to-tkinter-entry-widget/
import os
try: import tkinter
except: import Tkinter as tkinter
def _load_tkdnd(master):
tkdndlib = os.environ.get('TKDND_LIBRARY')
if tkdndlib:
master.tk.eval('global auto_path; lappend auto_path {%s}' % tkdndlib)
master.tk.eval('package require tkdnd')
master._tkdnd_loaded = True
class TkDND(object):
def __init__(self, master):
if not getattr(master, '_tkdnd_loaded', False):
_load_tkdnd(master)
self.master = master
self.tk = master.tk
# Available pre-defined values for the 'dndtype' parameter:
# text/plain
# text/plain;charset=UTF-8
# text/uri-list
def bindtarget(self, window, callback, dndtype, event='<Drop>', priority=50):
cmd = self._prepare_tkdnd_func(callback)
return self.tk.call('dnd', 'bindtarget', window, dndtype, event, cmd, priority)
def bindtarget_query(self, window, dndtype=None, event='<Drop>'):
return self.tk.call('dnd', 'bindtarget', window, dndtype, event)
def cleartarget(self, window):
self.tk.call('dnd', 'cleartarget', window)
def bindsource(self, window, callback, dndtype, priority=50):
cmd = self._prepare_tkdnd_func(callback)
self.tk.call('dnd', 'bindsource', window, dndtype, cmd, priority)
def bindsource_query(self, window, dndtype=None):
return self.tk.call('dnd', 'bindsource', window, dndtype)
def clearsource(self, window):
self.tk.call('dnd', 'clearsource', window)
def drag(self, window, actions=None, descriptions=None,
cursorwin=None, callback=None):
cmd = None
if cursorwin is not None:
if callback is not None:
cmd = self._prepare_tkdnd_func(callback)
self.tk.call('dnd', 'drag', window, actions, descriptions,
cursorwin, cmd)
_subst_format = ('%A', '%a', '%b', '%D', '%d', '%m', '%T',
'%W', '%X', '%Y', '%x', '%y')
_subst_format_str = " ".join(_subst_format)
def _prepare_tkdnd_func(self, callback):
funcid = self.master.register(callback, self._dndsubstitute)
cmd = ('%s %s' % (funcid, self._subst_format_str))
return cmd
def _dndsubstitute(self, *args):
if len(args) != len(self._subst_format):
return args
def try_int(x):
x = str(x)
try:
return int(x)
except ValueError:
return x
A, a, b, D, d, m, T, W, X, Y, x, y = args
event = tkinter.Event()
event.action = A # Current action of the drag and drop operation.
event.action_list = a # Action list supported by the drag source.
event.mouse_button = b # Mouse button pressed during the drag and drop.
event.data = D # The data that has been dropped.
event.descr = d # The list of descriptions.
event.modifier = m # The list of modifier keyboard keys pressed.
event.dndtype = T
event.widget = self.master.nametowidget(W)
event.x_root = X # Mouse pointer x coord, relative to the root win.
event.y_root = Y
event.x = x # Mouse pointer x coord, relative to the widget.
event.y = y
event.action_list = str(event.action_list).split()
for name in ('mouse_button', 'x', 'y', 'x_root', 'y_root'):
setattr(event, name, try_int(getattr(event, name)))
return (event, )