📅  最后修改于: 2023-12-03 15:03:58.926000             🧑  作者: Mango
PyQt5中的QSpinBox小部件用于选择整数值。在某些情况下可能需要获取像素比例比例。本文介绍如何使用QSpinBox小部件来获取像素比例比例。
from PyQt5.QtWidgets import QApplication, QMainWindow, QSpinBox
from PyQt5.QtGui import QGuiApplication, QWindow
import sys
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("QSpinBox")
self.setGeometry(100, 100, 300, 100)
self.spin_box = QSpinBox(self)
self.spin_box.setGeometry(100, 50, 100, 30)
self.show()
screen = QGuiApplication.primaryScreen()
dpi = screen.physicalDotsPerInch()
window = self.windowHandle()
device_pixel_ratio = window.devicePixelRatio()
print("DPI: ", dpi)
print("Device Pixel Ratio: ", device_pixel_ratio)
pixel_ratio = dpi / 96 * device_pixel_ratio
print("Pixel Ratio: ", pixel_ratio)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
sys.exit(app.exec_())
代码中首先导入了必要的类库和模块,而后创建了MainWindow类,并初始化了QSpinBox小部件。接着使用QGuiApplication和QWindow类获取了屏幕的DPI和窗口的设备像素比。最后,计算出像素比例比例并打印到控制台。
screen = QGuiApplication.primaryScreen()
dpi = screen.physicalDotsPerInch()
window = self.windowHandle()
device_pixel_ratio = window.devicePixelRatio()
pixel_ratio = dpi / 96 * device_pixel_ratio
运行程序后,DPI、Device Pixel Ratio和Pixel Ratio值将打印在控制台上。例如:
DPI: 96.0
Device Pixel Ratio: 1.0
Pixel Ratio: 1.0