Check if an object of QPushButton has been created?

legitnameyo

I create a QPushButton in my .h using the following code

QPushButton *global_button;

It's in my .h since different functions access it and modify it in different ways. The issue I got is that there is a probability that I don't create a global_button using

global_button = new QPushButton(this);

but rather do something like

if(global_button->text() == "end") {
    qDebug() << "End.";
}

before even implementing global_button. If I try to call global_button before global_button = new QPushButton(this); then the program crashes. Is there a way to circumvent this? AKA to check if there is a new instance of global_button?

Christian Ehrlicher

@legitnameyo said in Check if an object of QPushButton has been created?:

global_button

Since it's a pointer you should properly initialize it to nullptr in the ctor and the you can check if it's still a nullptr or not - c++ basics.

legitnameyo

//in .h
QPushButton *global_button = nullptr;

//in .cpp
if(global_button == nullptr { /* actions */}

worked! Thanks!