Get previous index of QComboBox

M.Cocktail

Hi,

I have a subClass MyComboBox and when current Index is changed (by user or programmatically) i want get the previous index.

Any idea ?

Thanks
MC

Christian Ehrlicher

Any idea ?

Since you already subclassed it - just remember the previous one.

M.Cocktail

yes, but how can i do ?
I try to override signals and slots but it doesn't work

Christian Ehrlicher

but how can i do ?

You get a signal when the index changes - why not save this index then?

mrjj

Hi
Im not sure i understand it correctly as its very simple so i fear you are asking something else.

In .h in the class.

int OldIndex=-1;

Then in its ctor
connect(this, QOverload<int>::of(&QComboBox::currentIndexChanged),
[this](int index){
OldIndex = Index;
});