无法单击PyQt MenuBar

时间:2017-11-20 13:50:09

标签: python pyqt pyqt5

我正在尝试学习PyQt5并且当前正在使用Exit函数和Open函数创建一个MenuBar。我目前有MenuBar显示有效的快捷方式,但是当我将鼠标悬停在菜单栏上时,我无法点击它。这是我目前的代码:

import sys
from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication, QPushButton, QDesktopWidget, QLabel, QFileDialog
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import QCoreApplication
from win32api import GetSystemMetrics

CURRENT_VERSION = 0.1

class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        self.setWindowTitle('test')

        window_width = GetSystemMetrics(0)
        window_height = GetSystemMetrics(1)

        self.resize(0.6 * window_width, 0.6 * window_height)
        self.center()

        self.setWindowIcon(QIcon('Icon.png'))

        #Exit on menubar
        exitAct = QAction('&Exit', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.setStatusTip('Exit applicatiion')
        exitAct.triggered.connect(qApp.quit)

        #Open on menubar
        openAct = QAction('&Open', self)
        openAct.setShortcut('Ctrl+O')
        openAct.setStatusTip('Open Directory')
        openAct.triggered.connect(self.openFile)

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(exitAct)
        fileMenu.addAction(openAct)

        btn = QPushButton("Test", self)
        btn.resize(btn.sizeHint())
        btn.move(50, 50)

        btn.clicked.connect(self.buttonpress)

        self.label = QLabel(self)
        self.image = QLabel(self)
        self.openDirectoryDialog = ""

        self.show()

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())

    def openFile(self):
        self.openDirectoryDialog=ddir = QFileDialog.getExistingDirectory(self, "Get Dir Path")

    def buttonpress(self):
        label = QLabel(self)
        self.label.move(100,150)
        self.label.setFixedWidth(500)
        self.label.setFixedHeight(100)
        self.label.setText(self.openDirectoryDialog)


if __name__ == '__main__':

    app = QApplication(sys.argv)

    w = Example()

    sys.exit(app.exec_())

在我添加了打开文件的能力之前它才有效,但只有exit菜单项,但是我再也无法工作了。

1 个答案:

答案 0 :(得分:1)

问题是由于QLabel位于菜单上方,阻止了此次点击事件。 QMainWindow具有特定结构,如下图所示:

enter image description here

如果要添加小部件,则必须对中央小部件执行此操作,当您将父级传递给小部件时,它将放置在相对于它的位置“(0,0)。

进行修改后,您将获得以下内容:

class Example(QMainWindow):
    [...]
    def initUI(self):
        [...]

        #Exit on menubar
        exitAct = QAction('&Exit', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.setStatusTip('Exit applicatiion')
        exitAct.triggered.connect(qApp.quit)

        #Open on menubar
        openAct = QAction('&Open', self)
        openAct.setShortcut('Ctrl+O')
        openAct.setStatusTip('Open Directory')
        openAct.triggered.connect(self.openFile)

        menubar = self.menuBar()

        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(exitAct)
        fileMenu.addAction(openAct)

        centralwidget = QWidget(self)
        self.setCentralWidget(centralwidget)
        btn = QPushButton("Test", centralwidget)
        btn.resize(btn.sizeHint())
        btn.move(50, 50)

        btn.clicked.connect(self.buttonpress)

        self.label = QLabel(centralwidget)
        self.image = QLabel(centralwidget)
        [...]