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