Python pyqt學習筆記 物件拖曳[Kurt]

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
   
class Combo(QComboBox):

	def __init__(self, title, parent):
		super(Combo, self).__init__( parent)
		self.setAcceptDrops(True)
		
			def dragEnterEvent(self, e):
		print(e)
		if e.mimeData().hasText():
			e.accept()
		else:
			e.ignore() 

	def dropEvent(self, e):
		self.addItem(e.mimeData().text()) 
		
		class Example(QWidget):
	def __init__(self):
		super(Example, self).__init__()
		self.initUI()

	def initUI(self):
		lo = QFormLayout()
		lo.addRow(QLabel("請把左邊的文字拖拽到右邊的下拉式功能表中"))
		edit = QLineEdit()
		edit.setDragEnabled(True)
		com = Combo("Button", self)
		lo.addRow(edit,com)
		self.setLayout(lo)
		self.setWindowTitle('簡單拖拽例子')

if __name__ == '__main__':
	app = QApplication(sys.argv)
	ex = Example() 
	ex.show()
	sys.exit(app.exec_())

import sys
import time
from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget, QLabel, QLineEdit

class WorkerThread(QThread):
    # 定义一个信号，用于向主线程发送消息
    result_ready = pyqtSignal(int)

    def __init__(self, data):
        super().__init__()
        self.data = data

    def run(self):
        # 从Qt面板读取字符串并进行计算
        result = self.calculate_result(self.data)
        # 发送结果信号
        self.result_ready.emit(result)

    def calculate_result(self, data):
        # 模拟计算，这里简单地返回输入字符串的长度
        time.sleep(2)  # 模拟耗时操作
        return len(data)

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

        self.setWindowTitle("PyQt QThread 示例")
        self.setGeometry(100, 100, 300, 200)

        layout = QVBoxLayout()

        self.input_lineedit = QLineEdit(self)
        layout.addWidget(self.input_lineedit)

        self.button = QPushButton("开始计算", self)
        self.button.clicked.connect(self.start_task)
        layout.addWidget(self.button)

        self.result_label = QLabel("", self)
        layout.addWidget(self.result_label)

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

        self.worker_thread = None

    def start_task(self):
        # 创建并启动工作线程
        data = self.input_lineedit.text()
        self.worker_thread = WorkerThread(data)
        self.worker_thread.result_ready.connect(self.update_result)
        self.worker_thread.start()

    def update_result(self, result):
        # 更新结果文本
        self.result_label.setText(f"计算结果：{result}")

https://www.zhihu.com/column/pyqt5