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GPA_Calculator.py
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GPA_Calculator.py
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""""
==========================================
Title: GPA CALCULATOR
Author: 77aqsa
Date: 9 May 2021
==========================================
"""
from PyQt5.QtWidgets import (
QApplication, QWidget, QTableWidget, QFileDialog, QAction,
QFormLayout, QPushButton, QLabel, QMessageBox, QMenuBar, QFileDialog, QHeaderView
)
class Window(QWidget):
def __init__(self):
QWidget.__init__(self)
self.layout = QFormLayout()
self.setLayout(self.layout)
self.resize(600, 400)
self.setWindowTitle('GPA Calculator')
self.fileName = ''
self.menubar = QMenuBar()
self.menubar.setNativeMenuBar(False)
self.menubar.show()
self.fileMenu = self.menubar.addMenu('File')
self.actionSave = QAction('Save', self)
self.actionSave.setShortcut('Ctrl+S')
self.actionQuit = QAction('Quit', self)
self.actionQuit.setShortcut('Ctrl+Q')
self.fileMenu.addAction(self.actionSave)
self.fileMenu.addSeparator()
self.fileMenu.addAction(self.actionQuit)
self.button_add_subj = QPushButton(' Add Subject ')
self.button_rem_subj = QPushButton('Remove Subject')
self.button_calculate = QPushButton('Calculate GPA')
self.label_result = QLabel('Result: ')
self.label_grade_a = QLabel('A')
self.label_grade_amin = QLabel('A-')
self.label_grade_bplus = QLabel('B+')
self.label_grade_b = QLabel('B')
self.label_grade_bmin = QLabel('B-')
self.label_grade_cplus = QLabel('C+')
self.label_grade_c = QLabel('C')
self.label_grade_d = QLabel('D')
self.label_grade_e = QLabel('E')
self.label_total_index = QLabel('Total Index')
self.label_total_credit = QLabel('Total Credit')
self.label_gpa = QLabel('GPA')
self.result_a = QLabel('')
self.result_amin = QLabel('')
self.result_bplus = QLabel('')
self.result_b = QLabel('')
self.result_bmin = QLabel('')
self.result_cplus = QLabel('')
self.result_c = QLabel('')
self.result_d = QLabel('')
self.result_e = QLabel('')
self.result_total_index = QLabel('')
self.result_total_credit = QLabel('')
self.result_gpa = QLabel('')
self.table = QTableWidget()
self.table.setColumnCount(2)
self.table.setHorizontalHeaderLabels(['Subject', 'Score'])
#subject & score width will remain the same if window is resized
header = self.table.horizontalHeader()
header.setSectionResizeMode(QHeaderView.ResizeToContents)
header.setSectionResizeMode(0, QHeaderView.Stretch)
header.setSectionResizeMode(1, QHeaderView.Stretch)
self.layout.addRow(self.menubar)
self.layout.addRow(self.table)
self.layout.addRow(self.button_add_subj)
self.layout.addRow(self.button_rem_subj)
self.layout.addRow(self.button_calculate)
self.layout.addRow(self.label_result)
self.button_add_subj.clicked.connect(self.add_subj)
self.button_rem_subj.clicked.connect(self.rem_subj)
self.button_calculate.clicked.connect(self.calculate)
self.table.itemChanged.connect(self.on_change)
self.actionSave.triggered.connect(self.save)
self.actionQuit.triggered.connect(self.quit)
def add_subj(self):
row_count = self.table.rowCount()
self.table.insertRow(row_count)
def rem_subj(self):
row_count = self.table.rowCount() - 1
self.table.removeRow(row_count)
def on_change(self, item):
col = item.column()
if col == 1 and not item.text().isnumeric():
item.setText('')
elif col == 1 and float(item.text()) < 0:
item.setText('')
elif col == 1 and float(item.text()) > 100:
item.setText('')
def calculate(self):
a = 0
amin = 0
bplus = 0
b = 0
bmin = 0
cplus = 0
c = 0
d = 0
e = 0
credits = 3
for row in range(0, self.table.rowCount()):
data = self.table.item(row, 1)
if data:
score = float(data.text())
if score > 84:
a += 1
elif score > 79:
amin += 1
elif score > 74:
bplus += 1
elif score > 69:
b += 1
elif score > 66:
bmin += 1
elif score > 63:
cplus += 1
elif score > 59:
c += 1
elif score > 54:
d += 1
else:
e += 1
self.result_a.setText(': %d' % a)
self.result_amin.setText(': %d' % amin)
self.result_bplus.setText(': %d' % bplus)
self.result_b.setText(': %d' % b)
self.result_bmin.setText(': %d' % bmin)
self.result_cplus.setText(': %d' % cplus)
self.result_c.setText(': %d' % c)
self.result_d.setText(': %d' % d)
self.result_e.setText(': %d' % e)
total_index = (
(a*4*credits) + (amin*3.67*credits) + (bplus*3.33*credits) +
(b*3*credits) + (bmin*2.67*credits) + (cplus*2.33*credits) +
(c*2*credits) + (d*credits)
)# since e grade have index of 0, no need to calculate
self.result_total_index.setText(': %.2f' % total_index)
total_credit = self.table.rowCount() * credits
self.result_total_credit.setText(': %.2f' % total_credit)
gpa = total_index/total_credit
self.result_gpa.setText(': %.2f' % gpa)
else:
self.warning()
self.reset()
self.layout.addRow(self.label_grade_a, self.result_a)
self.layout.addRow(self.label_grade_amin, self.result_amin)
self.layout.addRow(self.label_grade_bplus, self.result_bplus)
self.layout.addRow(self.label_grade_b, self.result_b)
self.layout.addRow(self.label_grade_bmin, self.result_bmin)
self.layout.addRow(self.label_grade_cplus, self.result_cplus)
self.layout.addRow(self.label_grade_c, self.result_c)
self.layout.addRow(self.label_grade_d, self.result_d)
self.layout.addRow(self.label_grade_e, self.result_e)
self.layout.addRow(self.label_total_index, self.result_total_index)
self.layout.addRow(self.label_total_credit, self.result_total_credit)
self.layout.addRow(self.label_gpa, self.result_gpa)
def warning(self):
msg = QMessageBox()
msg.setWindowTitle('Warning')
msg.setIcon(QMessageBox.Icon.Warning)
msg.setText('Complete or remove empty rows!')
msg.exec_()
def reset(self):
self.result_a.setText('')
self.result_amin.setText('')
self.result_bplus.setText('')
self.result_b.setText('')
self.result_bmin.setText('')
self.result_cplus.setText('')
self.result_c.setText('')
self.result_d.setText('')
self.result_e.setText('')
self.result_total_index.setText('')
self.result_total_credit.setText('')
self.result_gpa.setText('')
def save(self):
name, _ = QFileDialog.getSaveFileName(
self, 'Save your gpa into txt file', self.fileName, 'txt (*.txt)')
if name:
self.fileName = name
file = open(name, 'w')
result = self.label_result.text()
grade_a = self.label_grade_a.text()
grade_amin = self.label_grade_amin.text()
grade_bplus = self.label_grade_bplus.text()
grade_b = self.label_grade_b.text()
grade_bmin = self.label_grade_bmin.text()
grade_cplus = self.label_grade_cplus.text()
grade_c = self.label_grade_c.text()
grade_d = self.label_grade_d.text()
grade_e = self.label_grade_e.text()
total_index = self.label_total_index.text()
total_credit = self.label_total_credit.text()
gpa = self.label_gpa.text()
result_a = self.result_a.text()
result_amin = self.result_amin.text()
result_bplus = self.result_bplus.text()
result_b = self.result_b.text()
result_bmin = self.result_bmin.text()
result_cplus = self.result_cplus.text()
result_c = self.result_c.text()
result_d = self.result_d.text()
result_e = self.result_e.text()
result_total_index = self.result_total_index.text()
result_total_credit = self.result_total_credit.text()
result_gpa = self.result_gpa.text()
file.write(result + '\n')
file.write(grade_a + result_a + '\n')
file.write(grade_amin + result_amin + '\n')
file.write(grade_bplus + result_bplus + '\n')
file.write(grade_b + result_b + '\n')
file.write(grade_bmin + result_bmin + '\n')
file.write(grade_cplus + result_cplus + '\n')
file.write(grade_c + result_c + '\n')
file.write(grade_d + result_d + '\n')
file.write(grade_e + result_e + '\n')
file.write(total_index + result_total_index + '\n')
file.write(total_credit + result_total_credit + '\n')
file.write(gpa + result_gpa)
file.close()
def quit(self):
QApplication.quit()
app = QApplication([])
window = Window()
window.show()
app.exec_()