Thank you everbody, thanks to you I have found a way to correct my program. I did as you told me to do: I removed everything the Constructor object knew about its parent (puting it in the parent instead) and the problem went away. I still don't know from where it was coming, but we can clearly see that having a better-programmed program helps to correct some bugs. ^^
Thanks again to everybody. :D
If you want my corrected code, here it is:
main.cpp (nothing changed)
#include "Window.h"
#include <QtWidgets/QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Window w;
w.show();
return a.exec();
}
Window.h
#ifndef DEF_WINDOW
#define DEF_WINDOW
#include "Constructor.h"
#include <QWidget>
#include <QVBoxLayout>
#include <QPushButton>
#include <vector>
class Window : public QWidget
{
Q_OBJECT
public:
Window();
public slots:
void addConstructor();
void destroyConstructor(Constructor*);
private:
QVBoxLayout* mainLayout = new QVBoxLayout;
QVBoxLayout* constructorLayout = new QVBoxLayout;
std::vector<Constructor*>* constructorVector = new std::vector<Constructor*>;
QPushButton* addConstructorButton = new QPushButton("+", this);
};
#endif
Window.cpp
#include "Window.h"
Window::Window()
{
connect(addConstructorButton, SIGNAL(clicked()), this, SLOT(addConstructor()));
mainLayout->addLayout(constructorLayout);
mainLayout->addWidget(addConstructorButton);
setLayout(mainLayout);
}
void Window::addConstructor()
{
Constructor* c = new Constructor(this);
constructorLayout->addWidget(c);
constructorVector->push_back(c);
connect(c, SIGNAL(mustBeDestroyed(Constructor*)), this, SLOT(destroyConstructor(Constructor*)));
}
void Window::destroyConstructor(Constructor* c)
{
constructorLayout->removeWidget(c);
//remove object from vector
for (int i = 0; i < constructorVector->size(); i++)
if (constructorVector->at(i) == c) {
constructorVector->erase(constructorVector->begin() + i);
break;
}
}
Constructor,h
#ifndef DEF_CONSTRUCTOR
#define DEF_CONSTRUCTOR
#include <QWidget>
#include <QLineEdit>
#include <QHBoxLayout>
#include <QPushButton>
#include <QLayout>
#include <vector>
class Constructor : public QWidget
{
Q_OBJECT
public:
Constructor(QWidget* parentWidget);
public slots:
void destroySelf();
signals:
void mustBeDestroyed(Constructor*);
private:
QLineEdit* lineEdit = new QLineEdit(this);
QPushButton* destroyConstructorButton = new QPushButton("-", this);
};
#endif
Constructor.cpp
#include "Constructor.h"
Constructor::Constructor(QWidget* parentWidget) : QWidget(parentWidget)
{
connect(destroyConstructorButton, SIGNAL(clicked()), this, SLOT(destroySelf()));
QHBoxLayout* layout = new QHBoxLayout;
layout->addWidget(lineEdit);
layout->addWidget(destroyConstructorButton);
setLayout(layout);
}
void Constructor::destroySelf()
{
delete lineEdit;
delete destroyConstructorButton;
emit mustBeDestroyed(this);
this->disconnect();
delete this;
}
