检测 Widget-window resized 信号中的调整大小

2022-01-12 00:00:00 python pyqt pyqt5 qwidget

问题描述

我使用 Qt Designer 创建了一个简单的 UI，并将其转换为 Python 代码.我搜索了任何方法来检测窗口大小的变化.

I create a simple UI with Qt Designer and convert it to Python codes. I searched for any method to detect changing window size.

这是生成的代码:

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def onResize(event):
        print(event)

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.setWindowTitle("MainWindow")
        MainWindow.resize(200, 200)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        MainWindow.setCentralWidget(self.centralwidget)

        MainWindow.resized.connect(self.someFunction)

        QtCore.QMetaObject.connectSlotsByName(MainWindow)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

我发现了一个类似的问题QWidget resize signal?和本教程处理大小 建议覆盖 resizeEvent 方法QMainWindow.

I found a similar question QWidget resize signal? and this tutorial to handle size that recommended overriding resizeEvent method of QMainWindow.

但其中任何一个都不能解决我的问题.是否有任何 resized 函数来检测窗口调整大小，如下所示:

But any of them doesn't solve my problem. Is there any resized function to detect window resizing like below:

MainWindow.resized.connect(self.someFunction)

解决方案

默认没有这个信号，但是你可以创建resized信号，我们在resizeEvent 函数.

There is no such signal by default, but you can create the resized signal, we emit it in the resizeEvent function.

例如:

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.setWindowTitle("MainWindow")
        MainWindow.resize(200, 200)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        MainWindow.setCentralWidget(self.centralwidget)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)


class Window(QtWidgets.QMainWindow):
    resized = QtCore.pyqtSignal()
    def  __init__(self, parent=None):
        super(Window, self).__init__(parent=parent)
        ui = Ui_MainWindow()
        ui.setupUi(self)
        self.resized.connect(self.someFunction)

    def resizeEvent(self, event):
        self.resized.emit()
        return super(Window, self).resizeEvent(event)

    def someFunction(self):
        print("someFunction")


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = Window()
    w.show()
    sys.exit(app.exec_())

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