import sys
import unittest
import tkinter
from tkinter import ttk
from test.support import requires, gc_collect
from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest
requires('gui')
class LabeledScaleTest(AbstractTkTest, unittest.TestCase):
def tearDown(self):
self.root.update_idletasks()
super().tearDown()
def test_widget_destroy(self):
# automatically created variable
x = ttk.LabeledScale(self.root)
var = x._variable._name
x.destroy()
gc_collect() # For PyPy or other GCs.
self.assertRaises(tkinter.TclError, x.tk.globalgetvar, var)
# manually created variable
myvar = tkinter.DoubleVar(self.root)
name = myvar._name
x = ttk.LabeledScale(self.root, variable=myvar)
x.destroy()
if self.wantobjects:
self.assertEqual(x.tk.globalgetvar(name), myvar.get())
else:
self.assertEqual(float(x.tk.globalgetvar(name)), myvar.get())
del myvar
gc_collect() # For PyPy or other GCs.
self.assertRaises(tkinter.TclError, x.tk.globalgetvar, name)
# checking that the tracing callback is properly removed
myvar = tkinter.IntVar(self.root)
# LabeledScale will start tracing myvar
x = ttk.LabeledScale(self.root, variable=myvar)
x.destroy()
# Unless the tracing callback was removed, creating a new
# LabeledScale with the same var will cause an error now. This
# happens because the variable will be set to (possibly) a new
# value which causes the tracing callback to be called and then
# it tries calling instance attributes not yet defined.
ttk.LabeledScale(self.root, variable=myvar)
if hasattr(sys, 'last_exc'):
self.assertNotEqual(type(sys.last_exc), tkinter.TclError)
elif hasattr(sys, 'last_type'):
self.assertNotEqual(sys.last_type, tkinter.TclError)
def test_initialization(self):
# master passing
master = tkinter.Frame(self.root)
x = ttk.LabeledScale(master)
self.assertEqual(x.master, master)
x.destroy()
# variable initialization/passing
passed_expected = (('0', 0), (0, 0), (10, 10),
(-1, -1), (sys.maxsize + 1, sys.maxsize + 1),
(2.5, 2), ('2.5', 2))
for pair in passed_expected:
x = ttk.LabeledScale(self.root, from_=pair[0])
self.assertEqual(x.value, pair[1])
x.destroy()
x = ttk.LabeledScale(self.root, from_=None)
self.assertRaises((ValueError, tkinter.TclError), x._variable.get)
x.destroy()
# variable should have its default value set to the from_ value
myvar = tkinter.DoubleVar(self.root, value=20)
x = ttk.LabeledScale(self.root, variable=myvar)
self.assertEqual(x.value, 0)
x.destroy()
# check that it is really using a DoubleVar
x = ttk.LabeledScale(self.root, variable=myvar, from_=0.5)
self.assertEqual(x.value, 0.5)
self.assertEqual(x._variable._name, myvar._name)
x.destroy()
# widget positionment
def check_positions(scale, scale_pos, label, label_pos):
self.assertEqual(scale.pack_info()['side'], scale_pos)
self.assertEqual(label.place_info()['anchor'], label_pos)
x = ttk.LabeledScale(self.root, compound='top')
check_positions(x.scale, 'bottom', x.label, 'n')
x.destroy()
x = ttk.LabeledScale(self.root, compound='bottom')
check_positions(x.scale, 'top', x.label, 's')
x.destroy()
# invert default positions
x = ttk.LabeledScale(self.root, compound='unknown')
check_positions(x.scale, 'top', x.label, 's')
x.destroy()
x = ttk.LabeledScale(self.root) # take default positions
check_positions(x.scale, 'bottom', x.label, 'n')
x.destroy()
# extra, and invalid, kwargs
self.assertRaises(tkinter.TclError, ttk.LabeledScale, master, a='b')
def test_horizontal_range(self):
lscale = ttk.LabeledScale(self.root, from_=0, to=10)
lscale.pack()
lscale.update()
linfo_1 = lscale.label.place_info()
prev_xcoord = lscale.scale.coords()[0]
self.assertEqual(prev_xcoord, int(linfo_1['x']))
# change range to: from -5 to 5. This should change the x coord of
# the scale widget, since 0 is at the middle of the new
# range.
lscale.scale.configure(from_=-5, to=5)
# The following update is needed since the test doesn't use mainloop,
# at the same time this shouldn't affect test outcome
lscale.update()
curr_xcoord = lscale.scale.coords()[0]
self.assertNotEqual(prev_xcoord, curr_xcoord)
# the label widget should have been repositioned too
linfo_2 = lscale.label.place_info()
self.assertEqual(lscale.label['text'], 0 if self.wantobjects else '0')
self.assertEqual(curr_xcoord, int(linfo_2['x']))
# change the range back
lscale.scale.configure(from_=0, to=10)
self.assertNotEqual(prev_xcoord, curr_xcoord)
self.assertEqual(prev_xcoord, int(linfo_1['x']))
lscale.destroy()
def test_variable_change(self):
x = ttk.LabeledScale(self.root)
x.pack()
x.update()
curr_xcoord = x.scale.coords()[0]
newval = x.value + 1
x.value = newval
# The following update is needed since the test doesn't use mainloop,
# at the same time this shouldn't affect test outcome
x.update()
self.assertEqual(x.value, newval)
self.assertEqual(x.label['text'],
newval if self.wantobjects else str(newval))
self.assertEqual(float(x.scale.get()), newval)
self.assertGreater(x.scale.coords()[0], curr_xcoord)
self.assertEqual(x.scale.coords()[0],
int(x.label.place_info()['x']))
# value outside range
if self.wantobjects:
conv = lambda x: x
else:
conv = int
x.value = conv(x.scale['to']) + 1 # no changes shouldn't happen
x.update()
self.assertEqual(x.value, newval)
self.assertEqual(conv(x.label['text']), newval)
self.assertEqual(float(x.scale.get()), newval)
self.assertEqual(x.scale.coords()[0],
int(x.label.place_info()['x']))
# non-integer value
x.value = newval = newval + 1.5
x.update()
self.assertEqual(x.value, int(newval))
self.assertEqual(conv(x.label['text']), int(newval))
self.assertEqual(float(x.scale.get()), newval)
x.destroy()
def test_resize(self):
x = ttk.LabeledScale(self.root)
x.pack(expand=True, fill='both')
gc_collect() # For PyPy or other GCs.
x.update()
width, height = x.master.winfo_width(), x.master.winfo_height()
width_new, height_new = width * 2, height * 2
x.value = 3
x.update()
x.master.wm_geometry("%dx%d" % (width_new, height_new))
self.assertEqual(int(x.label.place_info()['x']),
x.scale.coords()[0])
# Reset geometry
x.master.wm_geometry("%dx%d" % (width, height))
x.destroy()
class OptionMenuTest(AbstractTkTest, unittest.TestCase):
def setUp(self):
super().setUp()
self.textvar = tkinter.StringVar(self.root)
def tearDown(self):
del self.textvar
super().tearDown()
def test_widget_destroy(self):
var = tkinter.StringVar(self.root)
optmenu = ttk.OptionMenu(self.root, var)
name = var._name
optmenu.update_idletasks()
optmenu.destroy()
self.assertEqual(optmenu.tk.globalgetvar(name), var.get())
del var
gc_collect() # For PyPy or other GCs.
self.assertRaises(tkinter.TclError, optmenu.tk.globalgetvar, name)
def test_initialization(self):
self.assertRaises(tkinter.TclError,
ttk.OptionMenu, self.root, self.textvar, invalid='thing')
optmenu = ttk.OptionMenu(self.root, self.textvar, 'b', 'a', 'b')
self.assertEqual(optmenu._variable.get(), 'b')
self.assertTrue(optmenu['menu'])
self.assertTrue(optmenu['textvariable'])
optmenu.destroy()
def test_menu(self):
items = ('a', 'b', 'c')
default = 'a'
optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
found_default = False
for i in range(len(items)):
value = optmenu['menu'].entrycget(i, 'value')
self.assertEqual(value, items[i])
if value == default:
found_default = True
self.assertTrue(found_default)
optmenu.destroy()
# default shouldn't be in menu if it is not part of values
default = 'd'
optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
curr = None
i = 0
while True:
last, curr = curr, optmenu['menu'].entryconfigure(i, 'value')
if last == curr:
# no more menu entries
break
self.assertNotEqual(curr, default)
i += 1
self.assertEqual(i, len(items))
# check that variable is updated correctly
optmenu.pack()
gc_collect() # For PyPy or other GCs.
optmenu['menu'].invoke(0)
self.assertEqual(optmenu._variable.get(), items[0])
# changing to an invalid index shouldn't change the variable
self.assertRaises(tkinter.TclError, optmenu['menu'].invoke, -1)
self.assertEqual(optmenu._variable.get(), items[0])
optmenu.destroy()
# specifying a callback
success = []
def cb_test(item):
self.assertEqual(item, items[1])
success.append(True)
optmenu = ttk.OptionMenu(self.root, self.textvar, 'a', command=cb_test,
*items)
optmenu['menu'].invoke(1)
if not success:
self.fail("Menu callback not invoked")
optmenu.destroy()
def test_unique_radiobuttons(self):
# check that radiobuttons are unique across instances (bpo25684)
items = ('a', 'b', 'c')
default = 'a'
optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
textvar2 = tkinter.StringVar(self.root)
optmenu2 = ttk.OptionMenu(self.root, textvar2, default, *items)
optmenu.pack()
optmenu2.pack()
optmenu['menu'].invoke(1)
optmenu2['menu'].invoke(2)
optmenu_stringvar_name = optmenu['menu'].entrycget(0, 'variable')
optmenu2_stringvar_name = optmenu2['menu'].entrycget(0, 'variable')
self.assertNotEqual(optmenu_stringvar_name,
optmenu2_stringvar_name)
self.assertEqual(self.root.tk.globalgetvar(optmenu_stringvar_name),
items[1])
self.assertEqual(self.root.tk.globalgetvar(optmenu2_stringvar_name),
items[2])
optmenu.destroy()
optmenu2.destroy()
def test_trace_variable(self):
# prior to bpo45160, tracing a variable would cause the callback to be made twice
success = []
items = ('a', 'b', 'c')
textvar = tkinter.StringVar(self.root)
def cb_test(*args):
success.append(textvar.get())
optmenu = ttk.OptionMenu(self.root, textvar, "a", *items)
optmenu.pack()
cb_name = textvar.trace_add("write", cb_test)
optmenu['menu'].invoke(1)
self.assertEqual(success, ['b'])
self.assertEqual(textvar.get(), 'b')
textvar.trace_remove("write", cb_name)
optmenu.destroy()
class DefaultRootTest(AbstractDefaultRootTest, unittest.TestCase):
def test_labeledscale(self):
self._test_widget(ttk.LabeledScale)
if __name__ == "__main__":
unittest.main()
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