import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QPushButton, QInputDialog, QWidget, QLineEdit


class MainWindow(QMainWindow):

    def __init__(self):
        super().__init__()

        self.setWindowTitle("My App")

        layout = QVBoxLayout()

        button1 = QPushButton("Integer")
        button1.clicked.connect(self.get_an_int)
        layout.addWidget(button1)

        button2 = QPushButton("Float")
        button2.clicked.connect(self.get_a_float)
        layout.addWidget(button2)

        button3 = QPushButton("Select")
        button3.clicked.connect(self.get_a_string_from_a_list)
        layout.addWidget(button3)

        button4 = QPushButton("String")
        button4.clicked.connect(self.get_a_str)
        layout.addWidget(button4)

        button5 = QPushButton("Text")
        button5.clicked.connect(self.get_a_text)
        layout.addWidget(button5)

        container = QWidget()
        container.setLayout(layout)

        self.setCentralWidget(container)

    def get_an_int(self):
        title = "Enter an interger"
        label = "Please enter an integer"
        my_int_value, ok = QInputDialog.getInt(self,
                                               title,
                                               label,
                                               value=0,
                                               min=5,
                                               max=50,
                                               step=1)
        print("Result:", ok, my_int_value)

    def get_a_float(self):
        title = "Enter a float"
        label = "Please enter a float"
        my_float_value, ok = QInputDialog.getDouble(self,
                                                    title,
                                                    label,
                                                    value=0.0,
                                                    min=-5.3,
                                                    max=10.0,
                                                    decimals=2)
        print("Result:", ok, my_float_value)

    def get_a_string_from_a_list(self):
        title = "Select an item"
        label = "Please select an item"
        items = ["apple", "pear", "orange", "grape"]
        initail_selection = 2  # index of orange
        item, ok = QInputDialog.getItem(self, title, label, items,
                                        initail_selection, False)
        print("Result:", ok, item)

    def get_a_str(self):
        title = "Enter a string"
        label = "Type your password"
        text = "my secret password"
        my_str_value, ok = QInputDialog.getText(self, title, label,
                                                QLineEdit.Password, text)
        print("Result:", ok, my_str_value)

    def get_a_text(self):
        title = "Enter a text"
        label = "Type your message"
        text = "Hello, World! ..."
        my_text_value, ok = QInputDialog.getMultiLineText(
            self, title, label, text)
        print("Result:", ok, my_text_value)


if __name__ == "__main__":
    app = QApplication(sys.argv)

    window = MainWindow()
    window.show()

    app.exec_()