how to display window(Window A), when clicked on a button of another window(Window B)

[prophet0]

in window_A.h

include "window_b.h"

private slot:

void showWindow_B();

and pointer to window_b in private so

Window_B *myWindow_B;

in window_A.cpp

add
in your main funtion

connect(ui.startButton, SIGNAL(clicked()), this, SLOT(showWindow_B());


void Window_A::showWindow_B
{
myWindow_B.show();
{


works in my current project with 5 uis