import platform
from os import environ
import tkinter as tk
from tkinter import ttk
from tkinter import filedialog
from tkinter import messagebox
from tkinter.font import nametofont
from datetime import datetime
from . import views as v
from . import models as m
from .mainmenu import get_main_menu_for_os
from .images import ABQ_LOGO_32, ABQ_LOGO_64
class Application(tk.Tk):
"""Application root window"""
config_dirs = {
'Linux': environ.get('$XDG_CONFIG_HOME', '~/.config'),
'freebsd7': environ.get('$XDG_CONFIG_HOME', '~/.config'),
'Darwin': '~/Library/Application Support',
'Windows': '~/AppData/Local'
}
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.title("ABQ Data Entry Application")
self.resizable(width=False, height=False)
self.taskbar_icon = tk.PhotoImage(file=ABQ_LOGO_64)
self.call('wm', 'iconphoto', self._w, self.taskbar_icon)
self.logo = tk.PhotoImage(file=ABQ_LOGO_32)
tk.Label(self, image=self.logo).grid(row=0)
self.inserted_rows = []
self.updated_rows = []
datestring = datetime.today().strftime("%Y-%m-%d")
default_filename = "abq_data_record_{}.csv".format(datestring)
self.filename = tk.StringVar(value=default_filename)
# settings model & settings
config_dir = self.config_dirs.get(platform.system(), '~')
self.settings_model = m.SettingsModel(path=config_dir)
self.load_settings()
self.set_font()
self.settings['font size'].trace('w', self.set_font)
style = ttk.Style()
theme = self.settings.get('theme').get()
if theme in style.theme_names():
style.theme_use(theme)
# create data model
self.database_login()
if not hasattr(self, 'data_model'):
self.destroy()
return
self.callbacks = {
'file->select': self.on_file_select,
'file->quit': self.quit,
'show_recordlist': self.show_recordlist,
'new_record': self.open_record,
'on_open_record': self.open_record,
'on_save': self.on_save,
'get_seed_sample': self.get_current_seed_sample,
'get_check_tech': self.get_tech_for_lab_check
}
menu_class = get_main_menu_for_os(platform.system())
menu = menu_class(self, self.settings, self.callbacks)
self.config(menu=menu)
# The data record form
self.recordform = v.DataRecordForm(
self, self.data_model.fields, self.settings, self.callbacks)
self.recordform.grid(row=1, padx=10, sticky='NSEW')
# The data record list
self.recordlist = v.RecordList(
self,
self.callbacks,
inserted=self.inserted_rows,
updated=self.updated_rows
)
self.recordlist.grid(row=1, padx=10, sticky='NSEW')
self.populate_recordlist()
# status bar
self.status = tk.StringVar()
self.statusbar = ttk.Label(self, textvariable=self.status)
self.statusbar.grid(sticky="we", row=3, padx=10)
self.records_saved = 0
def show_recordlist(self):
"""Show the recordform"""
self.recordlist.tkraise()
def populate_recordlist(self):
try:
rows = self.data_model.get_all_records()
except Exception as e:
messagebox.showerror(
title='Error',
message='Problem reading file',
detail=str(e)
)
else:
self.recordlist.populate(rows)
def open_record(self, rowkey=None):
"""Rowkey must be a tuple of (Date, Time, Lab, Plot)"""
if rowkey is None:
record = None
else:
try:
record = self.data_model.get_record(*rowkey)
except Exception as e:
messagebox.showerror(
title='Error',
message='Problem reading file',
detail=str(e)
)
return
self.recordform.load_record(rowkey, record)
self.recordform.tkraise()
def on_save(self):
"""Handles save button clicks"""
# Check for errors first
errors = self.recordform.get_errors()
if errors:
message = "Cannot save record"
detail = "The following fields have errors: \n * {}".format(
'\n * '.join(errors.keys())
)
self.status.set(
"Cannot save, error in fields: {}"
.format(', '.join(errors.keys()))
)
messagebox.showerror(title='Error', message=message, detail=detail)
return False
data = self.recordform.get()
try:
self.data_model.save_record(data)
except Exception as e:
messagebox.showerror(
title='Error',
message='Problem saving record',
detail=str(e)
)
self.status.set('Problem saving record')
else:
self.records_saved += 1
self.status.set(
"{} records saved this session".format(self.records_saved)
)
key = (data['Date'], data['Time'], data['Lab'], data['Plot'])
if self.data_model.last_write == 'update':
self.updated_rows.append(key)
else:
# we just inserted a row
self.inserted_rows.append(key)
self.populate_recordlist()
# Only reset the form when we're appending records
if self.data_model.last_write == 'insert':
self.recordform.reset()
def on_file_select(self):
"""Handle the file->select action from the menu"""
filename = filedialog.asksaveasfilename(
title='Select the target file for saving records',
defaultextension='.csv',
filetypes=[('CSV', '*.csv *.CSV')]
)
if filename:
self.filename.set(filename)
self.data_model = m.CSVModel(filename=self.filename.get())
self.populate_recordlist()
self.inserted_rows = []
self.updated_rows = []
def save_settings(self, *args):
"""Save the current settings to a preferences file"""
for key, variable in self.settings.items():
self.settings_model.set(key, variable.get())
self.settings_model.save()
def load_settings(self):
"""Load settings into our self.settings dict."""
vartypes = {
'bool': tk.BooleanVar,
'str': tk.StringVar,
'int': tk.IntVar,
'float': tk.DoubleVar
}
# create our dict of settings variables from the model's settings.
self.settings = {}
for key, data in self.settings_model.variables.items():
vartype = vartypes.get(data['type'], tk.StringVar)
self.settings[key] = vartype(value=data['value'])
# put a trace on the variables so they get stored when changed.
for var in self.settings.values():
var.trace('w', self.save_settings)
def set_font(self, *args):
font_size = self.settings['font size'].get()
font_names = ('TkDefaultFont', 'TkMenuFont', 'TkTextFont')
for font_name in font_names:
tk_font = nametofont(font_name)
tk_font.config(size=font_size)
def database_login(self):
"""Try to login to the database and create self.data_model"""
error = ''
db_host = self.settings['db_host'].get()
db_name = self.settings['db_name'].get()
title = "Login to {} at {}".format(db_name, db_host)
while True:
login = v.LoginDialog(self, title, error)
if not login.result:
break
else:
username, password = login.result
try:
self.data_model = m.SQLModel(
db_host, db_name, username, password)
except m.pg.OperationalError:
error = "Login Failed"
else:
break
def get_current_seed_sample(self, *args):
if not (
hasattr(self, 'recordform')
and self.settings['autofill sheet data'].get()
):
return
data = self.recordform.get()
plot = data['Plot']
lab = data['Lab']
if plot and lab:
seed = self.data_model.get_current_seed_sample(lab, plot)
self.recordform.inputs['Seed sample'].set(seed)
self.recordform.focus_next_empty()
def get_tech_for_lab_check(self, *args):
if not (
hasattr(self, 'recordform')
and self.settings['autofill sheet data'].get()
):
return
data = self.recordform.get()
date = data['Date']
time = data['Time']
lab = data['Lab']
if all([date, time, lab]):
check = self.data_model.get_lab_check(date, time, lab)
tech = check['lab_tech'] if check else ''
self.recordform.inputs['Technician'].set(tech)
self.recordform.focus_next_empty()
