click() to the QMainWindow custom slot you have created).Code example:
MainWindow.h
// ...
include "newwindow.h"
// ...
public slots:
void openNewWindow();
// ...
private:
NewWindow *mMyNewWindow;
// ...
}
MainWindow.cpp
// ...
MainWindow::MainWindow()
{
// ...
connect(mMyButton, SIGNAL(click()), this, SLOT(openNewWindow()));
// ...
}
// ...
void MainWindow::openNewWindow()
{
mMyNewWindow = new NewWindow(); // Be sure to destroy your window somewhere
mMyNewWindow->show();
// ...
}
This is an example on how display a custom new window. There are a lot of ways to do this.