So i am basically almost done with my C++ App Logic Wise tho the only thing i struggle with and wanna figure it is how to include a seperate class into my main class constructors >.>
Mostly due to the fact that currently in my Code my main Code has 2 Objects tho ErrorWin Object is right now the only one that exist twice as seperate Objects which itd like to fix >.>
So this is my first Object in my Main Function which just calls my DisplayWindow Function while my ErrorWin Object calls the Display Error Window Function :P
int main() {
ErrorWindow ErrorWin;
MainWindow MainWin;
if (ProgramPath.empty()) {
ErrorWin.DisplayErrorWindow();
return Fl::run();
}
MainWin.DisplayMainWindow();
return Fl::run();
}
Now the Main Issue is that only my First Text basically gets displayed in the Error Window even tho my switch Statement is set to display a different error text basically according to my callback but that obviously does not work due to theyre being seperate ErrorWin Objects :(
void MainWindow::CallbackSaveFile(Fl_Widget* Widget, void* Data) {
MainWindow* MainWindowData = static_cast<MainWindow*>(Data);
ErrorWindow ErrorWin;
if (!MainWindowData->InputFile.empty()) {
...
} else {
ErrorWin.DisplayErrorWindow();
}
}
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Can you elaborate what exactly you wish to achieve? You could pass a pointer to the instance of one class in the constructor of the other.
If you need more info on constructors, see cppreference.
Also, I would recommend to make you variables start with lower-case, to distinguish from class names. Makes it easier at a glance.
Basically my Idea is/was to use 1 Function that being DisplayErrorWindow and have all the Errortexts basically inside it as nothing ever changes aside from the Text i couldve just used if statements :P
But sadly it wiull only display the first Error Text and not any of the other Error Texts no matter what i modify and i did already check my if statement Logic inside the Function and nothings wrong on that Part :cWithout more code it’s impossible to say what your problem is. Are you expecting a function to be called that isn’t? Use a debugger to go through if so.
Initialize ErrorWin as a pointer. Instantiate it in main (or at initialization).
Remember to delete the data in the destructor.
huh? O.o
so you mean like this for Example? >.>int main() { ErrorWindow* ErrorWin; MainWindow MainWin(&ErrorWin);and then inside mainwindow source files like this? O.o
class MainWindow { public: MainWindow(ErrorWindow* ErrorWin); private: ErrorWindow* ErrWin; MainWindow::MainWindow(ErrorWindow* ErrorWin) : ErrWin(ErrorWin) {because all i recieve is this error even tho i included errorwindow.hpp inside mainwindow.hpp and cpp file >.>
In file included from src/gui/errorwindow.hpp:20, from src/main.cpp:13: src/gui/mainwindow.hpp:56:27: error: expected ‘)’ before ‘*’ token 56 | MainWindow(ErrorWindow* ErrorWin); | ~ ^ | ) src/gui/mainwindow.hpp:83:5: error: ‘ErrorWindow’ does not name a type 83 | ErrorWindow* ErrWin; | ^~~~~~~~~~~ make: *** [Linux.mk:39: build/main.o] Error 1First, in your main, you want judt
ErrorWindow ErrorWin;. As it is, you’re taking a pointer to a pointer with the&(also it’s not initialized).Second, does your MainWindow.hpp know the ErrorWindow? You may have to forward declare it (write
class ErrorWindow;at the top, to tell the compiler it exists without saying anything else). If you include the other header files respectively, they include each other, so you get a cycle.yup just removed the infinite cycle by just doing class ErrorWindow; inside mainwindow.hpp :P
also if i remove MainWindow MainWin; from main then obviously all i get is a compiler Error as i require MainWin inside my Main Function >.>src/main.cpp:20:5: error: ‘MainWin’ was not declared in this scope; did you mean ‘MainWindow’?I did not mean to remove MainWindow from main, I meant you shoud change
ErrorWindow* ErrorWintoErrorWindow ErrorWin, because you don’t want a pointer variable, you want an instance, and then you pass a pointer to the instance usingas you did.
