395 lines
14 KiB
Python
395 lines
14 KiB
Python
# -*- coding: utf-8; -*-
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################################################################################
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#
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# WuttaPOS -- Pythonic Point of Sale System
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# Copyright © 2023 Lance Edgar
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#
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# This file is part of WuttaPOS.
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#
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# WuttaPOS is free software: you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# WuttaPOS is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# WuttaPOS. If not, see <http://www.gnu.org/licenses/>.
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#
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################################################################################
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"""
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WuttaPOS - POS view
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"""
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import flet as ft
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from .base import WuttaView
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class POSView(WuttaView):
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"""
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Main POS view for WuttaPOS
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"""
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def build_controls(self):
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self.main_input = ft.TextField(on_submit=self.main_submit,
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text_size=24,
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text_style=ft.TextStyle(weight=ft.FontWeight.BOLD),
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autofocus=True)
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self.items = ft.ListView()
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self.txn_total = ft.Text("", size=40)
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self.items_column = ft.Column(
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controls=[
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ft.Container(content=self.items,
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padding=ft.padding.only(10, 0, 10, 0)),
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ft.Row([self.txn_total],
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alignment=ft.MainAxisAlignment.END),
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],
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expand=1,
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)
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def tenkey_click(e):
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value = e.control.content.value
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if value == 'ENTER':
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print('TODO: handle enter')
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elif value == '⌫': # backspace
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if self.main_input.value:
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self.main_input.value = self.main_input.value[:-1]
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self.page.update()
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elif value == '↑':
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pass # TODO
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elif value == '↓':
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pass # TODO
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else:
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self.main_input.value = f"{self.main_input.value or ''}{value}"
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self.page.update()
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# TODO: should be configurable?
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tenkey_button_size = 100
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tenkey_font_size = 40
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def tenkey_button(text, width=tenkey_button_size):
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return ft.Container(content=ft.Text(text, size=tenkey_font_size,
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weight=ft.FontWeight.BOLD),
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height=tenkey_button_size,
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width=width,
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on_click=tenkey_click,
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alignment=ft.alignment.center,
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border=ft.border.all(1, 'black'),
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border_radius=ft.border_radius.all(5),
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bgcolor='green')
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self.tenkey_menu = ft.Container(
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content=ft.Column(
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[
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ft.Row(
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[
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tenkey_button("1"),
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tenkey_button("2"),
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tenkey_button("3"),
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tenkey_button("⌫"),
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],
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spacing=0,
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),
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ft.Row(
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[
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tenkey_button("4"),
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tenkey_button("5"),
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tenkey_button("6"),
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tenkey_button("↑"),
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],
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spacing=0,
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),
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ft.Row(
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[
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tenkey_button("7"),
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tenkey_button("8"),
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tenkey_button("9"),
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tenkey_button("↓"),
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],
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spacing=0,
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),
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ft.Row(
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[
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tenkey_button("0"),
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tenkey_button("00"),
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tenkey_button("ENTER", width=tenkey_button_size * 2),
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],
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alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
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spacing=0,
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),
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],
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spacing=0,
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),
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expand=0)
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meta_button_height = tenkey_button_size
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meta_button_width = meta_button_height * 2
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meta_font_size = tenkey_font_size
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def meta_button(text, on_click=None, bgcolor='yellow'):
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return ft.Container(content=ft.Text(text, size=meta_font_size,
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weight=ft.FontWeight.BOLD),
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height=meta_button_height,
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width=meta_button_width,
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# on_click=meta_click,
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on_click=on_click,
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alignment=ft.alignment.center,
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border=ft.border.all(1, 'black'),
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border_radius=ft.border_radius.all(5),
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bgcolor=bgcolor)
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self.meta_menu = ft.Container(
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content=ft.Column(
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[
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ft.Row(
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[
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meta_button("MGR"),
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meta_button("VOID", bgcolor='red', on_click=self.void_click),
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],
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spacing=0,
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),
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ft.Row(
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[
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meta_button("ITEM"),
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meta_button("CUST"),
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],
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spacing=0,
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),
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ft.Row(
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[
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meta_button("TODO"),
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meta_button("TODO"),
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],
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spacing=0,
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),
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ft.Row(
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[
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meta_button("TODO"),
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meta_button("TODO"),
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],
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spacing=0,
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),
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],
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spacing=0,
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),
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expand=0)
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context_button_height = tenkey_button_size
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context_button_width = context_button_height * 2
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context_font_size = tenkey_font_size
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def context_button(text, on_click=None):
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return ft.Container(content=ft.Text(text, size=context_font_size,
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weight=ft.FontWeight.BOLD),
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height=context_button_height,
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width=context_button_width,
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on_click=on_click,
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alignment=ft.alignment.center,
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border=ft.border.all(1, 'black'),
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border_radius=ft.border_radius.all(5),
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bgcolor='orange')
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self.context_menu = ft.Container(
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content=ft.Column(
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[
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ft.Row(
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[
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context_button("CASH", on_click=self.tender_click),
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context_button("CHECK", on_click=self.tender_click),
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],
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spacing=0,
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),
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],
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spacing=0,
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),
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expand=0)
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return [
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self.build_header(),
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ft.Row(
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[self.main_input],
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alignment=ft.MainAxisAlignment.CENTER,
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),
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ft.Row(),
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ft.Row(),
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ft.Row(),
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ft.Row(
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[
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self.items_column,
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ft.Column(
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[
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ft.Row(
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[
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self.tenkey_menu,
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self.meta_menu,
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],
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),
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self.context_menu,
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],
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),
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],
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vertical_alignment=ft.CrossAxisAlignment.START,
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),
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]
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def make_text(self, *args, **kwargs):
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kwargs.setdefault('weight', ft.FontWeight.BOLD)
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kwargs.setdefault('size', 24)
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return ft.Text(*args, **kwargs)
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def did_mount(self):
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model = self.model
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session = self.app.make_session()
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handler = self.app.get_batch_handler('pos')
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user = session.get(model.User, self.page.shared['user_uuid'])
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batch = handler.get_current_batch(user, create=True)
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self.page.shared['txn_display'] = batch.id_str
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self.items.controls.clear()
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for row in batch.active_rows():
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self.add_row_item(row)
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self.txn_total.value = self.app.render_currency(batch.sales_total)
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session.commit()
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session.close()
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def add_row_item(self, row):
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quantity = self.app.render_quantity(row.quantity)
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pretty_price = self.app.render_currency(row.txn_price)
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self.items.controls.append(
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ft.Container(
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content=ft.Row(
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[
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ft.Row([
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self.make_text(f"{row.description}"),
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self.make_text(f"× {quantity} @ {pretty_price}",
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weight=None, italic=True, size=20),
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]),
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self.make_text(pretty_price),
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],
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alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
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),
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border=ft.border.only(bottom=ft.border.BorderSide(1, 'gray')),
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padding=ft.padding.only(0, 5, 0, 5)))
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def void_click(self, e):
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def confirm(e):
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dlg.open = False
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model = self.model
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session = self.app.make_session()
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handler = self.app.get_batch_handler('pos')
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user = session.get(model.User, self.page.shared['user_uuid'])
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batch = handler.get_current_batch(user, create=True)
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# void current batch
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handler.void_batch(batch, user)
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session.flush()
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# make new batch
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batch = handler.get_current_batch(user, create=True)
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# commit changes
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session.commit()
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session.close()
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# reset txn display
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self.items.controls.clear()
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self.txn_total.value = None
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self.page.shared['txn_display'] = batch.id_str
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self.header.update_txn_display()
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# TODO: not clear why must call update() for header too?
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self.header.update()
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self.page.update()
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def cancel(e):
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dlg.open = False
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self.page.update()
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dlg = ft.AlertDialog(
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modal=True,
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title=ft.Text("Confirm VOID"),
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content=ft.Text("Really VOID this transaction?"),
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actions=[
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ft.TextButton("Yes", on_click=confirm),
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ft.TextButton("No", on_click=cancel),
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])
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self.page.dialog = dlg
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dlg.open = True
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self.page.update()
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def tender_click(self, e):
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model = self.model
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session = self.app.make_session()
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handler = self.app.get_batch_handler('pos')
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user = session.get(model.User, self.page.shared['user_uuid'])
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batch = handler.get_current_batch(user)
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# tender / execute batch
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tender = e.control.content.value
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handler.tender_and_execute(batch, user, tender)
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# make new batch
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batch = handler.get_current_batch(user, create=True)
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session.commit()
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session.close()
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# reset txn display
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self.items.controls.clear()
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self.txn_total.value = None
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self.page.shared['txn_display'] = batch.id_str
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self.header.update_txn_display()
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# TODO: not clear why must call update() for header too?
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self.header.update()
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self.main_input.focus()
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self.page.update()
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def main_submit(self, e):
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handler = self.app.get_batch_handler('pos')
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session = self.app.make_session()
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model = self.model
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user = session.get(model.User, self.page.shared['user_uuid'])
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batch = handler.get_current_batch(user)
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value = self.main_input.value
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row = handler.process_entry(batch, value)
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if row:
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self.add_row_item(row)
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self.txn_total.value = self.app.render_currency(batch.sales_total)
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else:
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self.page.snack_bar = ft.SnackBar(ft.Text(f"UNRECOGNIZED: {value}",
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color='black',
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weight=ft.FontWeight.BOLD),
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bgcolor='yellow',
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duration=1500)
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self.page.snack_bar.open = True
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session.commit()
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session.close()
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self.main_input.value = ""
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self.main_input.focus()
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self.page.update()
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