In PyQT4, how can I hide the window title of a child widget?

Question

I am working in PyQT4 with Qt Designer. My goal is to hide the title bar of a widget.

I know there is a method like widget.setWindowFlags (QtCore.Qt.CustomizeWindowHint) or widget.setWindowFlags (QtCore.Qt.FramelessWindowHint), but it doesn't work in my case.

My widget is a child of QWorkspace. That means my widget was added to Qworspace. I am trying to hide the title bar in the same way, but it doesn't work.

Does anybody knows how to remove the program's title bar in this case?

My Code: I tried with both methods. They have been commented out.

Edit:

modul: search.py

from PyQt4.QtGui import QWidget
from PyQt4.uic import loadUi
from PyQt4.QtCore import Qt

class Search_Window(QWidget):
    def __init__(self, parent=None):
        QWidget.__init__(self, parent, Qt.FramelessWindowHint)

        self.getPath_search_ui = os.path.join(os.path.abspath("."), 'files', "qt_ui", 'pp_search.ui')
        self.ui_pp_search = loadUi(self.getPath_search_ui, self)

modul: mdi.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import os

from PyQt4.QtGui import  QMainWindow, QWorkspace
from PyQt4.QtCore import Qt
from PyQt4.uic import loadUi

from ..modules_ui.ui_pp_search import Search_Window


    class Mdi_Main(QMainWindow):
        def __init__(self, parent=None):
            QMainWindow.__init__(self, parent)

            self.getPath_mdi = os.path.join(os.path.abspath("."), 'files', "qt_ui", 'pp_mdi.ui')

            self.ui_TestMainWorkSpace = loadUi(self.getPath_mdi, self)

            self.ui_TestMainWorkSpace.showMaximized()

            self.workspace = QWorkspace()
            self.workspace.setScrollBarsEnabled(True)
            self.setCentralWidget(self.workspace)

        def create_action_menu(self):
            self.ui_TestMainWorkSpace.actionSearch.triggered.connect(self.show_search_form)

        def show_search_form(self):
            search_form = Search_Window()
            self.workspace.addWindow(search_form, Qt.FramelessWindowHint)
            search_form.show()

You can see I try to hide the title bar by adding search_form to workspace. Its also doesn't work.

Answer 1

The following snippet works for me, by specifying the window flags to the addWindow method:

from PyQt4.QtGui import QApplication, QWorkspace, QTableView
from PyQt4.QtCore import Qt

def main():
    app = QApplication([])
    workspace = QWorkspace()
    view = QTableView()
    workspace.addWindow(view, Qt.FramelessWindowHint)
    workspace.show()
    app.exec_()

if __name__ == '__main__':
    main()