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 QColorclass 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():breakself.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_())