def test_next(mocker):
"""Test next function moves index by 1"""
mocker.patch("treepoem.generate_barcode")
bcg = BarcodeGenerator()
assert bcg.index == 0
bcg.next()
assert bcg.index == 1
assert bcg.code == "001"
class ChefShow(SlideShow):
"""Class to represent the ChefClub barcode slideshow"""
def __init__(self, start_index=None):
super().__init__('ChefCodes', self.update_image)
self.ccg = BarcodeGenerator()
if start_index:
self.ccg.jump(start_index)
self.back_button = tk.Button(self.panel,
text='Back',
command=self.jump_back)
self.back_button.pack(side='bottom')
# display the main window and enter the main loop
self.show()
def update_image(self):
"""Change the image that is displayed with the next one"""
code = self.ccg.next()
self.update_progress(code)
# treepoem returns a PIL object, we can resize that directly
barcode = self.ccg.barcode.resize((100, 100))
# Use PhotoImage so the barcode image data can be understood by tk
barcode = ImageTk.PhotoImage(barcode)
self.panel.image = barcode # avoid garbage collection
self.panel.config(image=barcode)
# Delay can not be too low, treepoem will choke running the barcode
# generation child processes
self.panel.after(1000, self.update_image)
def jump_back(self, distance=10):
"""Jump backwards some number of places in the slideshow"""
self.ccg.jump(self.ccg.index - distance)
self.update_progress()
def update_progress(self, code=''):
"""Update the progress label with some stats"""
super().update_progress(self.ccg.index, self.ccg.count, code)