[Solved] Connect combobox using signals

[Ratzz]

I am a newbie to QT can you tell how to pass a parent to QComboBox / QLabel?
I used below code Which opens the combobox and label in new window.But i want it in same mainwindow.

combobox->show();
 label->show();

[p3c0]

@Ratzz As said earlier just pass this. Thus it makes MainWindow parent of combobox and it will not open in new window. You have already done the same for pushbutton.
Edit: Pass it in it's constructor.

[Ratzz]

@p3c0
thank you.
I used this
combobox = new QComboBox(this);
Is it the proper way to do it ?

[p3c0]

@Ratzz Correct. Now the rest should work. Just don't forget to change the slot's definition.

[Ratzz]

@p3c0 Why to change the slot definition?

[p3c0]

@Ratzz Because in you have connected the signal activated to slot m_combobox which takes one argument.
connect(combobox,SIGNAL (activated(int)),this,SLOT(m_combobox(int)));
But there is no such slot defined with single argument and thus the connection will fail as it will not be able to find that slot. You have a slot m_combobox() which takes no arguments.

[Ratzz]

@p3c0
i used setGeometry() to assign position

•  pushbutton->setGeometry(QRect(QPoint(100, 200),QSize(90, 40)));
  

How to do use move();?

[p3c0]

@Ratzz pushbutton->move(10,100). See http://doc.qt.io/qt-5/qwidget.html#pos-prop
But as said earlier its best to use Layouts. See using Layouts for more details.

[Ratzz]

@p3c0 Can you give me rough sketch for my slot?

[p3c0]

@Ratzz
connect(combobox,SIGNAL (activated(int)),this,SLOT(m_combobox(int))); -> This is correct
mainwindow.h

private slots:
    void m_combobox(int index);

mainwindow.cpp

void MainWindow::m_combobox(int index)
{
    label->setText("1");
}

[Ratzz]

@p3c0
Thank you.
I will try using Layouts.

[p3c0]

@Ratzz You're Welcome :)
Since you are new here few more forum related reminders:

• Always surround the code blocks with ``` (3 backticks) while posting so that it gets nicely formatted and thus more readable for others.
• Mark the post as solved by editing the post title and prepending [Solved]

Happy Qt Coding ...

[Ratzz]

@p3c0
Sure :)