Can no longer build due to no matching function.

dejarked

My Qt project has been running fine, and all the code was working. However I realised I had added an incorrect UI file as I needed one with a menu bar. I deleted the original UI file and replaced it. My code however was still somehow calling the original UI file. I cleaned the project and ran QMake on it, as well as retyping the code to call it and still had no luck. The project complied but it didn't use the right file and I had no idea where it was getting the old one from.

I then took the user files out of the folder to see if that would force it to rebuild and rescan all the files. All that did however was give me an error. I removed the new user files and put the old ones back in and now it just throw up the error:

no matching function for call to 'Ui::behindlogin::setupUi(behindlogin* const)'

and it can't compile. I need to hand the first version of my project in on Friday and I can't even get it to run anymore!

SGaist

Hi and welcome to devnet,

Did you delete the ui file + the corresponding header and source files ? Did you change any name in between ?

dejarked

Thanks for the reply, I deleted the UI file only. I kept the headers from the old file but when I replaced the file I kept all the names the same. I also deleted the call code for the UI file and retyped it.

SGaist

Then, since you're in a hurry, the quick way: move these files out of the source tree, recreate your widget, copy back your custom code if you had any

dejarked

@SGaist Is it fine to copy the GUI as well or should I remake that? As in all my labels and edits etc.

SGaist

You can copy it, just check that all names are correct

dejarked

@SGaist So, I just copied over all the code to a completely new project in a new folder and Qt is still throwing me the same error as in the original post.

SGaist

Don't overwrite the new files with the content of the old one, just cherry-pick the modifications you made e.g. slot added etc.

dejarked

@SGaist Right, I only copied the code from the old slots directly into the ones in the new project made by Qt, still getting the same error.

SGaist

So, recreating your widget from scratch in a new project and just copying the slot code gives you the same error ?

dejarked

@SGaist Yup, new folder, new project I created all new files in Qt added all my GUI back, followed to slot, then copied the code in and still get the same error

SGaist

Did you check that all names were matching ? Ui widget name vs C++ widget name ?

dejarked

@SGaist Right, sorry to be causing so many problems, but thank you for the help! Everything is working now, I missed some of the includes, however I can't use .setModal(true); on a new window opening because it's saying the class has no member called setModal

            behindlogin behindlogin;
            behindlogin.setModal(true);
            behindlogin.exec();
            connClose();

SGaist

You're welcome !

setModal and exec are methods from QDialog. From what I understood you have a QMainWindow, no ?

dejarked

@SGaist Ahh yes, I've changed from a Dialog to a MainWindow as I wanted the menu bar at the top.

SGaist

So problem solved ? :)

dejarked

@SGaist The code actually compiles now! Thank you, the only issue left is I've replaced the code with

            behindlogin behindlogin;
            behindlogin.show();
            connClose();


Which causes the window to open and them immediately close after

SGaist

If you have something like:

{
    behindlogin behindlogin;
    behindlogin.show();
    connClose();
} <- behindlogin is destroyed here

dejarked

@SGaist Right, so I've replaced it with

                behindlogin *behindLogin;

in the header file and then

            behindLogin =new behindlogin(this);
            behindLogin->show();

in the main cpp file but it's saying that behindlogin does not name a type?

SGaist

Is behindlogin a member variable of a class ?