class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
self.label_amount = QLabel('Amount')
self.spin_amount = QDoubleSpinBox()
self.spin_amount.setRange(0, 10000000000)
self.spin_amount.setPrefix('Rp. ')
self.spin_amount.setSingleStep(100000)
self.label_rate = QLabel('Rate')
self.spin_rate = QDoubleSpinBox()
self.spin_rate.setSuffix(' %')
self.spin_rate.setSingleStep(0.1)
self.spin_rate.setRange(0, 100)
self.label_year = QLabel('Years')
self.spin_year = QSpinBox()
self.spin_year.setSuffix(' year')
self.spin_year.setSingleStep(1)
self.spin_year.setRange(0, 1000)
self.spin_year.setValue(1)
self.label_total_ = QLabel('Total')
self.label_total = QLabel('Rp. 0.00')
grid = QGridLayout()
grid.addWidget(self.label_amount, 0, 0)
grid.addWidget(self.spin_amount, 0, 1)
grid.addWidget(self.label_rate, 1, 0)
grid.addWidget(self.spin_rate, 1, 1)
grid.addWidget(self.label_year, 2, 0)
grid.addWidget(self.spin_year, 2, 1)
grid.addWidget(self.label_total_, 3, 0)
grid.addWidget(self.label_total, 3, 1)
self.setLayout(grid)
self.connect(self.spin_amount, SIGNAL('valueChanged(double)'),
self.update_ui)
self.connect(self.spin_rate, SIGNAL('valueChanged(double)'),
self.update_ui)
self.connect(self.spin_year, SIGNAL('valueChanged(int)'),
self.update_ui)
self.setWindowTitle('Interest')
def update_ui(self):
amount = self.spin_amount.value()
rate = self.spin_rate.value()
year = self.spin_year.value()
total = amount * (1 + rate / 100.0)**year
self.label_total.setText('Rp. %.2f' % total)
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
self.label_amount = QLabel('Amount')
self.spin_amount = QDoubleSpinBox()
self.spin_amount.setRange(0, 10000000000)
self.spin_amount.setPrefix('Rp. ')
self.spin_amount.setSingleStep(100000)
self.label_rate = QLabel('Rate')
self.spin_rate = QDoubleSpinBox()
self.spin_rate.setSuffix(' %')
self.spin_rate.setSingleStep(0.1)
self.spin_rate.setRange(0, 100)
self.label_year = QLabel('Years')
self.spin_year = QSpinBox()
self.spin_year.setSuffix(' year')
self.spin_year.setSingleStep(1)
self.spin_year.setRange(0, 1000)
self.spin_year.setValue(1)
self.label_total_ = QLabel('Total')
self.label_total = QLabel('Rp. 0.00')
grid = QGridLayout()
grid.addWidget(self.label_amount, 0, 0)
grid.addWidget(self.spin_amount, 0, 1)
grid.addWidget(self.label_rate, 1, 0)
grid.addWidget(self.spin_rate, 1, 1)
grid.addWidget(self.label_year, 2, 0)
grid.addWidget(self.spin_year, 2, 1)
grid.addWidget(self.label_total_, 3, 0)
grid.addWidget(self.label_total, 3, 1)
self.setLayout(grid)
self.connect(self.spin_amount, SIGNAL('valueChanged(double)'), self.update_ui)
self.connect(self.spin_rate, SIGNAL('valueChanged(double)'), self.update_ui)
self.connect(self.spin_year, SIGNAL('valueChanged(int)'), self.update_ui)
self.setWindowTitle('Interest')
def update_ui(self):
amount = self.spin_amount.value()
rate = self.spin_rate.value()
year = self.spin_year.value()
total = amount * (1 + rate / 100.0) ** year
self.label_total.setText('Rp. %.2f' % total)
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
principalLabel = QLabel("Principal:")
self.principalSpinBox = QDoubleSpinBox()
self.principalSpinBox.setRange(1, 1000000000)
self.principalSpinBox.setValue(1000)
self.principalSpinBox.setPrefix("$ ")
rateLabel = QLabel("Rate:")
self.rateSpinBox = QDoubleSpinBox()
self.rateSpinBox.setRange(1, 100)
self.rateSpinBox.setValue(5)
self.rateSpinBox.setSuffix(" %")
yearsLabel = QLabel("Years:")
self.yearsComboBox = QComboBox()
self.yearsComboBox.addItem("1 year")
self.yearsComboBox.addItems(
["{0} years".format(x) for x in range(2, 26)])
amountLabel = QLabel("Amount")
self.amountLabel = QLabel()
grid = QGridLayout()
grid.addWidget(principalLabel, 0, 0)
grid.addWidget(self.principalSpinBox, 0, 1)
grid.addWidget(rateLabel, 1, 0)
grid.addWidget(self.rateSpinBox, 1, 1)
grid.addWidget(yearsLabel, 2, 0)
grid.addWidget(self.yearsComboBox, 2, 1)
grid.addWidget(amountLabel, 3, 0)
grid.addWidget(self.amountLabel, 3, 1)
self.setLayout(grid)
self.connect(self.principalSpinBox, SIGNAL("valueChanged(double)"),
self.updateUi)
self.connect(self.rateSpinBox, SIGNAL("valueChanged(double)"),
self.updateUi)
self.connect(self.yearsComboBox, SIGNAL("currentIndexChanged(int)"),
self.updateUi)
self.setWindowTitle("Interest")
self.updateUi()
def updateUi(self):
"""Calculates compound interest"""
principal = self.principalSpinBox.value()
rate = self.rateSpinBox.value()
years = self.yearsComboBox.currentIndex() + 1
amount = principal * ((1 + (rate / 100.0))**years)
self.amountLabel.setText("$ {0:.2f}".format(amount))
