示例代码
代码语言：python代码运行次数：0复制from __future__ import annotations
import sys
from PySide6.QtCore import Qt, QTimer
from PySide6.QtWidgets import QApplication, QMainWindow, QProgressDialog, QPushButton, QVBoxLayout, QWidget
class MyMainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.progress = None
self.setWindowTitle("QProgressDialog Demo")
self.minimum_value = 0
self.maximum_value = 100
self.current_value = 0
self.timer = QTimer(self)
self.timer.timeout.connect(self.progress_dialog_update)
self.timer.setTimerType(Qt.TimerType.PreciseTimer)
self.timer.setInterval(20) # 每20毫秒触发一次
self.begin_button = QPushButton("开始运行")
self.begin_button.clicked.connect(self.progress_dialog_show)
v_layout = QVBoxLayout()
v_layout.addWidget(self.begin_button)
container = QWidget()
container.setLayout(v_layout)
self.setCentralWidget(container)
def progress_dialog_show(self):
self.progress = QProgressDialog(self)
self.progress.setWindowTitle("请稍候")
self.progress.setLabelText("正在处理...")
self.progress.setMinimum(self.minimum_value)
self.progress.setMaximum(self.maximum_value)
self.progress.setValue(self.minimum_value)
self.progress.setModal(True)
self.progress.setCancelButtonText("取消执行")
# self.progress.setCancelButton(None) # 隐藏按钮, 不展示此按钮
self.progress.canceled.connect(self.progress_canceled)
self.progress.show()
self.timer.start()
def progress_canceled(self):
print('用户取消了进度对话框, 当前已完成进展：{:.2f}%'.format(self.current_value / self.maximum_value * 100))
self.progress.setValue(self.maximum_value)
self.timer.stop()
self.progress.accept()
self.current_value = self.minimum_value
def progress_dialog_update(self):
if self.progress.value() 1 > self.current_value:
self.current_value = self.progress.value() 1
# 当进度值等于最大值时，QProgressDialog会将进度值重置为-1
# 因此无法直接判断progress.value() >= self.maximum_value
# 需要判断progress.value() < self.minimum_value或progress.value() >= self.progress.maximum() - 1
if self.progress.value() < self.minimum_value or self.progress.value() >= self.progress.maximum() - 1:
self.current_value = self.minimum_value
self.progress.setValue(self.maximum_value)
self.timer.stop()
self.progress.accept()
print('进度对话框已完成')
return
self.progress.setValue(self.progress.value() 1)
if __name__ == "__main__":
app = QApplication(sys.argv)
window = MyMainWindow()
window.show()
sys.exit(app.exec())运行效果
进度条运行效果特别注意
当进度值累加到最大值或超过最大值时，QProgressDialog会将进度值重置为-1
代码语言：python代码运行次数：0复制if __name__ == "__main__":
app = QApplication(sys.argv)
# 测试QProgressDialog在最大值时，会将进度值重置为-1
test_progress_dialog = QProgressDialog()
test_progress_dialog.setMinimum(0)
test_progress_dialog.setMaximum(10)
# 当进度值等于最大值时，QProgressDialog会将进度值重置为-1
# 在进度值达到最大值时自动完成并关闭
test_progress_dialog.setValue(10)
print(test_progress_dialog.value())
sys.exit(app.exec())
