[SOLVED]How to dynamic change the type of QWidget shown to the user

thiberi0

I am having a problem to make the QWidget change dynamic as the user change the index in combobox. I have a slot connected to the currentIndexChanged(int) from the combobox. This slot should change the widget shown to the user according to the index of combobox.
I tried the following code, but didn't work:
@void Form::setMetodoWidget(int index)
{
Form2* form2;// a different widget to show
if(index == 0 ){
ui->widget = new QWidget;

}
if(index == 1){
    form2 = new Form2;
    ui-&gt;widget = form2;
}

}@

I tried to add form2 in a vertical layout and then add to the widget, but then he gives this error message:
Attempting to set QLayout "" on QWidget "widget", which already has a layout

I would like to know how to do the "Promote to" function of QtDesigner,but in code.
Thanks.

Vinorcola

You must pass throught the layout:
http://qt-project.org/doc/qt-5/qlayout.html#removeWidget
and then add the new widget. Be careful to memory leak ;)

Vinorcola

Hop, even better way:
http://qt-project.org/doc/qt-5/qstackedlayout.html

ambershark

I would use a QStackedWidget. Then add all of the widgets you would like to display to it. Then you can like it to the combo box on change notification and change to the proper widget.

thiberi0

Thanks, I think QStackedLayout is exactly what a I need. Going to try later and if works I will post the code.

Vinorcola

Well, there already is a code example in the documentation that uses QComboBox ;) Look at the link I gave you in my second post.

thiberi0

Yes, and I just found another example at chapter 6 of Qt c++ GUI programming book.The problem it's solved already.Thanks guys.