Creating a Dialog in a Slot of QMainWindow

[spirit]

your code

#include "Dialog.h"
 
Dialog::Dialog(QWidget *parent = 0) : QWidget(parent){
    Ui::Dialog *ui = new Ui::Dialog;
    ui.setupUi(this);
}

#include "Dialog.h"
 
Dialog::Dialog(QWidget *parent = 0) : QWidget(parent){
    Ui::Dialog *ui = new Ui::Dialog;
    ui.setupUi(this);
}

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must be

#include "Dialog.h"
 
Dialog::Dialog(QWidget *parent) : QWidget(parent){
    Ui::Dialog *ui = new Ui::Dialog;
    ui.setupUi(this);
}

#include "Dialog.h"
 
Dialog::Dialog(QWidget *parent) : QWidget(parent){
    Ui::Dialog *ui = new Ui::Dialog;
    ui.setupUi(this);
}

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yup, memory leak.