PySide6로 데스크톱 앱 만들기 #6 스레드와 타이머 — 멈추지 않는 UI

import sys
import time

from PySide6.QtWidgets import (
    QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget, QLabel,
)

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.label = QLabel("대기 중")
        self.button = QPushButton("작업 시작")
        self.button.clicked.connect(self.run_task)

        layout = QVBoxLayout()
        layout.addWidget(self.label)
        layout.addWidget(self.button)
        container = QWidget()
        container.setLayout(layout)
        self.setCentralWidget(container)

    def run_task(self):
        self.label.setText("작업 중...")
        time.sleep(5)              # 무거운 작업 시뮬레이션
        self.label.setText("완료")

app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()

import time

from PySide6.QtCore import QObject, Signal, Slot

class Worker(QObject):
    progress = Signal(int)      # 진행률 (0~100)
    finished = Signal(str)      # 완료 메시지
    failed = Signal(str)        # 에러 메시지

    @Slot()
    def run(self):
        try:
            for i in range(1, 101):
                time.sleep(0.05)         # 실제로는 파일 처리, 네트워크 등
                self.progress.emit(i)
            self.finished.emit("100건 처리 완료")
        except Exception as e:
            self.failed.emit(str(e))

from PySide6.QtCore import QThread
from PySide6.QtWidgets import QProgressBar

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.progress_bar = QProgressBar()
        self.button = QPushButton("작업 시작")
        self.button.clicked.connect(self.start_task)
        # ... 레이아웃 구성은 앞 예제와 동일 ...

    def start_task(self):
        self.button.setEnabled(False)

        self.thread = QThread()
        self.worker = Worker()
        self.worker.moveToThread(self.thread)

        # 스레드가 시작되면 Worker.run 실행
        self.thread.started.connect(self.worker.run)

        # 진행 상황과 결과는 전부 시그널로 수신
        self.worker.progress.connect(self.progress_bar.setValue)
        self.worker.finished.connect(self.on_finished)
        self.worker.failed.connect(self.on_failed)

        # 뒷정리 — 작업이 끝나면 스레드 종료 후 객체 해제
        self.worker.finished.connect(self.thread.quit)
        self.worker.failed.connect(self.thread.quit)
        self.thread.finished.connect(self.worker.deleteLater)
        self.thread.finished.connect(self.thread.deleteLater)

        self.thread.start()

    def on_finished(self, message: str):
        self.statusBar().showMessage(message)
        self.button.setEnabled(True)

    def on_failed(self, error: str):
        self.statusBar().showMessage(f"실패: {error}")
        self.button.setEnabled(True)

from PySide6.QtCore import QTimer, QTime

self.clock_label = QLabel()
self.timer = QTimer(self)
self.timer.timeout.connect(self.update_clock)
self.timer.start(1000)          # 1000ms 간격

def update_clock(self):
    now = QTime.currentTime().toString("HH:mm:ss")
    self.clock_label.setText(now)

QTimer.singleShot(3000, self.statusBar().clearMessage)