Unresolved external symbol calling some simple constructive code inside of a slot generated by designer.

enjoysmath

void MainWindow::on_actionNew_triggered()
{
    auto tab_name = QString("New_blank");
    auto editor = new Editor(tab_name);
    addEditor(editor);
}

Thats the slot, the protototype was generated by "go to slot" from designer.

However it always results in:

mainwindow.obj:-1: error: LNK2019: unresolved external symbol "public: __cdecl Editor::Editor(class QString &)" (??0Editor@@QEAA@AEAVQString@@@Z) referenced in function "private: void __cdecl MainWindow::on_actionNew_triggered(void)" (?on_actionNew_triggered@MainWindow@@AEAAXXZ)

Which makes no sense to me at all because I'm that new. So what do I need to indicate in order to actually do something in the slot?

Things I've tried:

Wrapping the code in a void function in MainWindow. Now the call to that is unresolved... seems I can't do anything in the slot.
Switching to release - it builds. But I need to debug!
Changing the order of the source files in the .pro make file. no difference.

It says in red next to the error "File not found: mainwindow.obj" but I checked in the debug directory and they're there. editor.obj is not there however, it is in the .pro makefile, so Idk what's going on...

mrjj

Hi
It says
I cannot find
public: __cdecl Editor::Editor(class QString &)

where u use it in on_actionNew_triggered

so is the constructor like that ?
in your other post it was
Editor(QString& name, QMainWindow* window);

so it should be like
auto editor = new Editor(tab_name, this);

if its still like that.

enjoysmath

Re: Unresolved external symbol calling some simple constructive code inside of a slot generated by designer.

Yes, I have that correct. But error persists

mrjj

@enjoysmath
Try Clean and then Rebuild all.

SGaist

Hi,

Silly question but did you implement that constructor ?