如何在不打开新表格的情况下更改QWindow或QWidget？

Question

I have QMainWindow , and QWidget like :

 namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_actionUserAdd_triggered();

    void on_actionEditUser_triggered();

    void on_actionShow_User_triggered();

private:
    Ui::MainWindow *ui;

    EditUser *editUserWindow;
    ShowUser *showUserWindow;
};

QWidget is :

namespace Ui {
class EditUser;
}

class EditUser : public QWidget
{
    Q_OBJECT

public:
    explicit EditUser(QWidget *parent = 0);
    ~EditUser();

private:
    Ui::EditUser *ui;
};

And when actionEditUser is triggered I am creating new form:

editUserWindow = new EditUser();
editUserWindow->show();

However I do not want to open/create new form. I want to paste QWidget(EditUser) to QMainWindow . So that appliction can work on just 1 form, instead of 2,3 or more. Could you please kindly help me how to do it?

Answer 1

In Qt widget without parent is a separate window. So answer is simple: just set parent. For example:

editUserWindow = new EditUser(this);//inside mainwindow, mainwinodw is a parent of EditUser
editUserWindow->show();

But in this case editUserWindow will be placed at 0,0 position(in parent coordinates)(top left) , so you have 2 approaches. Use setGeometry() to set x , y , width and height of widget, and better approach: add this widget to your current layout.