https://github.com/python/cpython/commit/3618730de3b51423d54642603c9e7490d2a769d1 commit: 3618730de3b51423d54642603c9e7490d2a769d1 branch: 3.15 author: Miss Islington (bot) <[email protected]> committer: serhiy-storchaka <[email protected]> date: 2026-06-20T13:37:55Z summary:
[3.15] gh-151678: Add tests for tkinter.dnd (GH-151780) (GH-151790) Drive the drag-and-drop protocol (dnd_start and the DndHandler enter/ motion/commit, leave/cancel and end callbacks). (cherry picked from commit 2a126a534b0253cf65fb6d06da0cce72eb2eaa23) Co-authored-by: Serhiy Storchaka <[email protected]> Co-authored-by: Claude Opus 4.8 <[email protected]> files: A Lib/test/test_tkinter/test_dnd.py diff --git a/Lib/test/test_tkinter/test_dnd.py b/Lib/test/test_tkinter/test_dnd.py new file mode 100644 index 00000000000000..501b0d7f78586c --- /dev/null +++ b/Lib/test/test_tkinter/test_dnd.py @@ -0,0 +1,98 @@ +import unittest +import tkinter +from tkinter import dnd +from test.support import requires +from test.test_tkinter.support import setUpModule # noqa: F401 +from test.test_tkinter.support import AbstractTkTest + +requires('gui') + + +class Target: + def __init__(self, widget, log): + self.widget = widget + self.log = log + widget.dnd_accept = self.dnd_accept + + def dnd_accept(self, source, event): + self.log.append('accept') + return self + + def dnd_enter(self, source, event): + self.log.append('enter') + + def dnd_motion(self, source, event): + self.log.append('motion') + + def dnd_leave(self, source, event): + self.log.append('leave') + + def dnd_commit(self, source, event): + self.log.append('commit') + + +class Source: + def __init__(self, log): + self.log = log + + def dnd_end(self, target, event): + self.log.append('end') + + +class FakeEvent: + def __init__(self, widget, num=1): + self.num = num + self.widget = widget + self.x = self.y = self.x_root = self.y_root = 0 + + +class DndTest(AbstractTkTest, unittest.TestCase): + + def setUp(self): + super().setUp() + self.canvas = tkinter.Canvas(self.root) + self.canvas.pack() + # on_motion() locates the target with winfo_containing(). Bypass that + # real screen lookup, which depends on the window being visible and + # unobscured, so the test does not hinge on the window manager. + self.canvas.winfo_containing = lambda x, y: self.canvas + self.log = [] + self.source = Source(self.log) + self.target = Target(self.canvas, self.log) + + def test_drag_and_drop(self): + handler = dnd.dnd_start(self.source, FakeEvent(self.canvas)) + self.assertIsNotNone(handler) + handler.on_motion(FakeEvent(self.canvas)) # Enter the target. + handler.on_motion(FakeEvent(self.canvas)) # Move within the target. + handler.on_release(FakeEvent(self.canvas)) # Drop on the target. + self.assertEqual(self.log, + ['accept', 'enter', 'accept', 'motion', 'commit', 'end']) + + def test_cancel(self): + handler = dnd.dnd_start(self.source, FakeEvent(self.canvas)) + handler.on_motion(FakeEvent(self.canvas)) # Enter the target. + handler.cancel() # Leaves the target without committing. + self.assertEqual(self.log, ['accept', 'enter', 'leave', 'end']) + + def test_no_target(self): + # Nothing under the pointer accepts the drag. + self.canvas.winfo_containing = lambda x, y: None + handler = dnd.dnd_start(self.source, FakeEvent(self.canvas)) + handler.on_motion(FakeEvent(self.canvas)) + handler.on_release(FakeEvent(self.canvas)) + self.assertEqual(self.log, ['end']) + + def test_no_recursive_start(self): + handler = dnd.dnd_start(self.source, FakeEvent(self.canvas)) + self.assertIsNotNone(handler) + # A drag is already in progress, so a second start is ignored. + self.assertIsNone(dnd.dnd_start(self.source, FakeEvent(self.canvas))) + handler.cancel() + + def test_high_button_number_ignored(self): + self.assertIsNone(dnd.dnd_start(self.source, FakeEvent(self.canvas, num=6))) + + +if __name__ == "__main__": + unittest.main() _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
