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Launching QWidget from a QMain Window

I am making my first C ++ application - Qt4 and I am having trouble connecting my different uis. I have a main window with multiple buttons and when I click one I want to open another window.

MyMainWindowClass inherits from QMainWindow and the other inherits from QWidget.

Here's the code I've written so far:


#include <iostream>
#include "MyWidgetClass.hpp"
#include "MyMainWindowClass.hpp"
#include "ui_MyMainWindowClassUi.h"

MyMainWindowClass::MyMainWindowClass(QWidget *parent) : QMainWindow(parent), m_ui(new Ui::MyMainWindowClassUi) { m_ui->setupUi(this); initConnect(); }



void MyMainWindowClass::initConnect() { QObject::connect(m_ui->SomeBtn, SIGNAL(clicked()), this, SLOT(SomeBtnClicked())); // Some other QObject::connect calls return; }



void MyMainWindowClass::SomeBtnClicked() { std::cout << "Some Btn has been clicked" << std::endl; this->setEnabled(false); MyWidgetClass mwc(this); mwc.show(); return; }



This calls Ctor and Dtor from MyWidgetClass, disables MyMainWindowClassUi, but doesn't show my other GUI. What am I missing for the window to be displayed when I click the button?

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1 answer


Try this instead of a method SomeBtnClicked

:



MyWidgetClass *mwc;

void MyMainWindowClass::SomeBtnClicked()
{
    std::cout << "Some Btn has been clicked" << std::endl;
    this->setEnabled(false);

    if (!mwc)
        mwc = new MyWidgetClass(this);
    mwc->show();
    mwc->raise();
    mwc->setActiveWindow();  // Qt 4: activateWindow()

    return;
}
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