Hello, I just started Qt and have some trouble with switching widgets. I want to switch widgets by clicking on a pushbutton. An Example would be having a menu first, go to the settings screen and then back to the menu. I do not want to create a new instance of a widget everytime I press on a button. Better define every reachable widget in the headers. At the moment the programm crashed everytime I press on a button to get to the next page. Here is my code: main.cpp #include "widget.h" //#include "widget2.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); Widget w; w.show(); return a.exec(); } widget.h #ifndef WIDGET_H #define WIDGET_H #include <QWidget> class widget2; namespace Ui { class Widget; } class Widget : public QWidget { Q_OBJECT public: explicit Widget(QWidget *parent = 0); ~Widget(); widget2 * a; private slots: void on_pusha_clicked(); void on_exit_clicked(); private: Ui::Widget *ui; }; #endif // WIDGET_H widget2.h #ifndef WIDGET2_H #define WIDGET2_H #include <QWidget> class Widget; namespace Ui { class widget2; } class widget2 : public QWidget { Q_OBJECT public: explicit widget2(QWidget *parent = 0); ~widget2(); Widget* b; //welcome *firstPageWidget = new welcome; does not work private slots: void on_pushb_clicked(); void on_exit_clicked(); private: Ui::widget2 *ui; }; #endif // WIDGET2_H widget.cpp #include "widget.h" #include "ui_widget.h" #include "widget2.h" #include <iostream> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); } Widget::~Widget() { std::cout << "widget 1 destroyed" <<std::endl; delete ui; } void Widget::on_pusha_clicked() { this->close(); // close this widget //widget2 a; <-- this works but creats a new instance every time... a->show(); // and show other one } void Widget::on_exit_clicked() { this->close(); } widget2.cpp #include "widget2.h" #include "ui_widget2.h" #include "widget.h" #include <iostream> widget2::widget2(QWidget *parent) : QWidget(parent), ui(new Ui::widget2) { std::cout << "widget 2 created"<< std::endl; ui->setupUi(this); } widget2::~widget2() { delete ui; std::cout << "widget 2 destroyed"<< std::endl; } void widget2::on_pushb_clicked() { this->close(); b->show(); } void widget2::on_exit_clicked() { this->close(); } I hope anyone can help me. Thanks in advance Lunarix

@ Lunarix Of course that's how adding pages to QStackedWidget looks in QtCreator:

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Easy switching between Widgets with PushButtons

Solved General and Desktop

21 Posts 4 Posters 13.3k Views

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Lunarix

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@Eligijus
Thank you so much!
You solved all my problems so far. I did not know I could set up everything in the .ui file directly.
Thanks a lot, and have a nice day! :)
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