Qt Ui access without source file - qt

Question

Can I use the Qt design Form without class as kind of QMessageBox in the other source file? I have a class with source file, and a ui file without source file. In Ui namespace, I can only add header files, and not ui elements. I need to add many such dialoge boxes with QLineEdit and QPushButtons.
namespace Ui {
class MainWindow;
}

Answer 1

To use your .ui form you need to use uic. By launching the command uic basicform.ui it will write in the output the generated. So you can do this like that:
uic basicform.ui > ui_basicform.h
then you include the ui_basicform.h in your .cpp, and to the same than when you create a normal form class (add the ui namespace, create the ui attribute, initialize it, run the setupUi method).
For example for the Form is for a QWidget, in the mainwindow.h you have
namespace Ui {
class MainWindow;
}
add class Form;
then in attribute to the MainWindow class add Ui::Form ui_form;
After in the mainWindow.cpp the initializer list is like :
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
add ui_form(new Ui::Form)
then in the contructor you got:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
ui_form(new Ui::Form)
{
ui->setupUi(this);
}
now it's like:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
ui_form(new Ui::Form)
{
ui->setupUi(this);
QWidget* test = new QWidget(this);
ui_form->setupUi(test);
ui->centralWidget->layout()->addWidget(test);
}