How can I make my window(Widget) restart after switching to another window(Widget) in a QStackedWidget?

[BogdanR]

I have a QStackedWidget with the 0 index being my mainWindow and I have other two windows in it (let's call them window2 and window3). So window2 demands some data from the user and creates a txt file with that data and window3 dose some operations on that data and displays the results. I worked a lot at these two windows so they can work properly(it's my first time trying qt) but I can't find nowhere how to make them refresh/restart.
For example if someone fills half the data in window2 and than clicks on the button to go back to the main window I want everything in window2 to reset(and the same thing with window3 as well). So how do I do this?
P.S. First question on forums so sorry if it's too much or too little info

[SGaist]

Hi and welcome to devnet,

Add a reset function to your widget that you will call when clicking the back button.

[BogdanR]

Can you give me a basic code example please?

[JonB]

@BogdanR

void SomeClass::resetWindow2()
{
    window2.lineEdit.setText("");
    window2.comboBox1.setCurrentIndex(0);
    ...
}

void SomeClass::resetWindow3()
{
    window3.spinBox.setValue(0);
    ...
}

void SomeClass::stackedWidgetCurrentChanged(int index)
{
    if (index == 0)    // changing to index 0
    {
        resetWindow2();
        resetWindow3();
    }
}

connect(stackedWidget, &QStackedWidget::currentChanged, this, &SomeClass::stackedWidgetCurrentChanged);

[BogdanR]

@JonB
So I have to manually reset the values, containers and classes that are in that window?

[JonB]

@BogdanR
That depends. What else do you have in mind? It's not going to happen "magically". You have about 3 possibilities:

• If you new the container window/widget and create its contents yourself then you might delete the old one and new it again to get whatever "default" state, e.g. from Designer-generated code.

• You can do explicit resets on each child widget as shown.

• If you are happy to do a "generic" reset for each QWidget type --- e.g. all QLineEdits go to "", all QSpinBoxes go to 0 etc. --- you could write that in a function and use QObject::findChildren() to walk down every QWidget type calling ti, so you don't have to write individual-widget code.

It may be that instead of your QStackedWidget your application would actually better suit a QWizard Class. That is similar to a QStackedWidget but oriented towards "going through the pages as steps in a procedure". However, I don't think that offers to "reset" all widgets when you back to a previous page, but you could read what it has to say anyway.

[SGaist]

To add to @JonB, I was rather thinking of having the reset method implemented directly by each of your custom widget so that they are responsible for getting their internal state back to defaults.

[BogdanR]

Ok thanks! I think I understand what I have to do