pycharm——关于Pyqt5

PyQt5新手教程（七万字）

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton, QLabel, QInputDialog, QColorDialog, QFontDialog, QFileDialog, QProgressDialog, QMessageBox
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QColor


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("Dialogs Example")
        self.setGeometry(100, 100, 400, 300)

        layout = QVBoxLayout()

        # 输入对话框按钮
        input_btn = QPushButton("Input Dialog")
        input_btn.clicked.connect(self.show_input_dialog)
        layout.addWidget(input_btn)

        # 颜色对话框按钮
        color_btn = QPushButton("Color Dialog")
        color_btn.clicked.connect(self.show_color_dialog)
        layout.addWidget(color_btn)

        # 字体对话框按钮
        font_btn = QPushButton("Font Dialog")
        font_btn.clicked.connect(self.show_font_dialog)
        layout.addWidget(font_btn)

        # 打开文件对话框按钮
        open_file_btn = QPushButton("Open File Dialog")
        open_file_btn.clicked.connect(self.show_file_dialog)
        layout.addWidget(open_file_btn)

        # 进度对话框按钮
        progress_btn = QPushButton("Progress Dialog")
        progress_btn.clicked.connect(self.show_progress_dialog)
        layout.addWidget(progress_btn)

        # 消息框按钮
        message_btn = QPushButton("Message Box")
        message_btn.clicked.connect(self.show_message_box)
        layout.addWidget(message_btn)

        # 标签用于显示结果
        self.result_label = QLabel()
        layout.addWidget(self.result_label)

        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

    def show_input_dialog(self):
        text, ok = QInputDialog.getText(self, "Input Dialog", "Enter something:")
        if ok and text:
            self.result_label.setText(f"Input: {text}")
        else:
            self.result_label.setText("Input Dialog Canceled")

    def show_color_dialog(self):
        color = QColorDialog.getColor(QColor(255, 0, 0), self, "Color Dialog")
        if color.isValid():
            self.result_label.setStyleSheet(f"background-color: {color.name()}")
            self.result_label.setText(f"Selected Color: {color.name()}")

    def show_font_dialog(self):
        font, ok = QFontDialog.getFont(self)
        if ok:
            self.result_label.setFont(font)
            self.result_label.setText(f"Selected Font: {font.family()}, {font.pointSize()}pt")

    def show_file_dialog(self):
        file_name, _ = QFileDialog.getOpenFileName(self, "Open File Dialog", "", "All Files (*);;Text Files (*.txt)")
        if file_name:
            self.result_label.setText(f"Selected File: {file_name}")

    def show_progress_dialog(self):
        progress_dialog = QProgressDialog("Processing...", "Cancel", 0, 100, self)
        progress_dialog.setWindowModality(Qt.WindowModal)
        progress_dialog.setWindowTitle("Progress Dialog")

        for i in range(100):
            progress_dialog.setValue(i)
            if progress_dialog.wasCanceled():
                break

        self.result_label.setText("Progress Dialog Completed")

    def show_message_box(self):
        msg_box = QMessageBox()
        msg_box.setIcon(QMessageBox.Information)
        msg_box.setWindowTitle("Message Box")
        msg_box.setText("This is an information message box.")
        msg_box.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
        result = msg_box.exec_()

        if result == QMessageBox.Ok:
            self.result_label.setText("Message Box: Ok button clicked")
        else:
            self.result_label.setText("Message Box: Cancel button clicked")


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())