QMdiSubWindow Buttons Merged With Menubar

jmwright

My setup:
PyQt 5.9
Python 3.6.3
Ubuntu 17.10

I'm not sure if this is expected behavior, or if I've made a mistake in my code. The following code gives me a result that doesn't seem intuitive. The minimize/maximize/close buttons for the QMdiSubWindows end up merged into the menubar area.

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QMdiArea, QMdiSubWindow, QPlainTextEdit

class TestApp(QMainWindow):
    def __init__(self):
        super(TestApp, self).__init__()

        self.initUI()

    def initUI(self):
        self.mdiArea = QMdiArea()
        self.mdiArea.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.mdiArea.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.setCentralWidget(self.mdiArea)
        # self.mdiArea.setViewMode(QMdiArea.TabbedView)

        self.setWindowTitle('Test App')
        self.statusBar().showMessage('Ready')

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

        # self.toolbar = self.addToolBar('Main Tools')
        # self.toolbar.addWidget(logoLabel)

        self.showMaximized()

        subWin = QMdiSubWindow()
        child = QPlainTextEdit(self)
        subWin.setWidget(child)
        self.mdiArea.addSubWindow(subWin)
        subWin.setWindowState(Qt.WindowMaximized)

        subWin2 = QMdiSubWindow()
        child2 = QPlainTextEdit(self)
        subWin2.setWidget(child2)
        self.mdiArea.addSubWindow(subWin2)
        subWin2.setWindowState(Qt.WindowMaximized)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    testApp = TestApp()

    sys.exit(app.exec_())

This is the result I get.

Here's what I would expect (positioning and sizing the window manually).

Is there something wrong with my code, or is there a setting for the MdiArea to keep the subwindow buttons from running into the menubar area?

SGaist

Hi and welcome to devnet,

It might very well be a Ubuntu specific behaviour, can you recheck that with another window manager than Unity ?

jmwright

@SGaist Thanks for the reply. It has the same behavior in the MATE desktop environment. So far I've also tried in Unity and Gnome 3.0 as well.