[Advice wanted] Launch (show) widget from button click slot of the main window.

Carlos Diaz

EDIT:
See my first reply for a better approach

Hi,

I'm using fbs to deploy a test application, i'm trying to open/load a child widget on a slot called when i click a button located on the main window. The test doesn't work, but my main question is: Should i load the ui file of the second widget on a custom class as i first tried?

#!/usr/bin/env python3

from fbs_runtime.application_context import ApplicationContext

from PySide2.QtCore import *
from PySide2.QtWidgets import *

from PySide2.QtUiTools import QUiLoader

import sys
import time

class child_form(QObject, ApplicationContext):

    def __init__(self):
        QObject.__init__(self)

        self.ui = self.get_resource('child_widget.ui')
        self.window = QFile(self.ui)
        self.window.open(QFile.ReadOnly)

class AppContext(ApplicationContext):
    def run(self):

        self.app.setStyle('Fusion')

        main_window_ui = self.get_resource('main_window.ui')
        
        self.main_window = QFile(main_window_ui)
        self.main_window.open(QFile.ReadOnly)

        # Child form
        self.child_form = child_form()

        self.loader = QUiLoader()
        self.window = self.loader.load(self.main_window)

        self.window.pushButton.clicked.connect(self.on_push_button_clicked)

        self.window.show()
        return self.app.exec_()

    @Slot()
    def on_push_button_clicked(self):
        self.ui = self.get_resource('child_widget.ui')
        self.child_window = QFile(self.ui)
        self.child_window.open(QFile.ReadOnly)
        self.child = self.loader.load(self.child_window, self.window)
        self.child.show()
        
        time.sleep(100)

if __name__ == '__main__':
    appctxt = AppContext()
    exit_code = appctxt.run()
    sys.exit(exit_code)

Regards

Carlos Diaz

After some thought i can open a second widget from the button clicked slot of the main window, is this the best approach?

#!/usr/bin/env python3

from fbs_runtime.application_context import ApplicationContext

from PySide2.QtCore import *
from PySide2.QtWidgets import *

from PySide2.QtUiTools import QUiLoader

import sys

class child_form(QObject):

    def __init__(self, ui_resource):
        QObject.__init__(self)

        self.ui_file = QFile(ui_resource)
        self.ui_file.open(QFile.ReadOnly)

        loader = QUiLoader()

        self.window = loader.load(self.ui_file)
        self.ui_file.close()

        self.window.pushButton.clicked.connect(self.on_push_button_clicked)

    @Slot()
    def on_push_button_clicked(self):
        print('Hi from child')

    def show(self):
        self.window.show()

class AppContext(ApplicationContext):
    def run(self):

        self.app.setStyle('Fusion')

        main_window_ui = self.get_resource('main_window.ui')

        loader = QUiLoader()
        # Child form
        child_ui = self.get_resource('child_widget.ui')
        self.child = child_form(child_ui)
        
        self.window_file = QFile(main_window_ui)
        self.window_file.open(QFile.ReadOnly)

        self.window = loader.load(self.window_file)
        self.window_file.close()

        self.window.pushButton.clicked.connect(self.on_push_button_clicked)

        self.window.show()
        return self.app.exec_()

    @Slot()
    def on_push_button_clicked(self):
        self.child.show()

if __name__ == '__main__':
    appctxt = AppContext()
    exit_code = appctxt.run()
    sys.exit(exit_code)

Denni

I have a question - with this child window implementation -- why do you not use a QDockWidget along with QMainWindow? Aka why re-invent the wheel so-to-speak