Qt - QStackedLayout setCurrentIndex displays blank window instead of widget -


i started learning qt couple days ago make game, , i'm trying figure out how make layouts work.

what want window using qstackedlayout 2 widgets inside: startscreen , gamescreen. startscreen shown on top on program run. button in startscren connected function inside window, , window call setcurrentindex change widget on top gamescreen.

what happens right when click on button, view changes blank window. i've tried hardcoding setcurrentindex(0), nothing, setcurrentindex(1), gamescreen should , displays same blank window, , setcurrentindex(2), out of index bounds still nothing. connection going through, don't understand why blank window show instead of button have on gamescreen.

if can explain me concept missed , how fix it, i'd appreciate it. thanks!

here window.cpp:

window::window(qwidget *parent) : qwidget(parent) {   resize(640, 480);    layout = new qstackedlayout;    createstartscreen();   creategamescreen();   setlayout(layout);    show();  };  void window::createstartscreen(){    start = new startscreen();    layout->addwidget(start);    start->setwindow(this);  }  void window::playgame(){    layout->setcurrentindex(layout->indexof(game));  }  void window::creategamescreen(){    game = new gamescreen();    layout->addwidget(game); }

startscreen.cpp:

startscreen::startscreen(qwidget *parent) : qwidget(parent) {   newgamebutton = new qpushbutton("new game", this);   newgamebutton->setgeometry(qrect(qpoint(260, 300), qsize(120,40)));    quitbutton = new qpushbutton("quit", this);   quitbutton->setgeometry(qrect(qpoint(260, 360), qsize(120,40)));    connect(quitbutton, signal(clicked()), qapplication::instance(), slot(quit()));  };  void startscreen::setwindow(window *w){    connect(newgamebutton, signal(clicked()), w, slot(playgame()));  }

gamescreen.cpp:

gamescreen::gamescreen(qwidget *parent) : qwidget(parent) {   button = new qpushbutton("hi");   button->setgeometry(qrect(qpoint(260, 260), qsize(120,40))); };

that's because don't call show on button. should rather use layout handle it.

e.g.:

gamescreen::gamescreen(qwidget *parent)     : qwidget(parent) {     button = new qpushbutton(tr("hi"));     qhboxlayout *layout = new qhboxlayout(this);     layout->addwidget(button); };

button have size adapted text , cleaned positioned in gamescreen.

on side note, should rather add signal startscreen request new game , connection in window. way won't have tight coupling between startscreen , window.


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