How can I automatically add new objects in Qt5? - c++

Question

For convenience, I created a function that helps me add new objects, but the MainWindow function doesn't accept them. So how can the MainWindow function receive the newly created object?
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QFrame>
#include <QVBoxLayout>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private:
void CreateNewObj(int row, int column, int rowSpan, int columnSpan);
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
for (int i = 0; i < 10; i++)
{
MainWindow::CreateNewObj(i,0,1,1);
}
// HERE
// this->ui->frame_1... IN HERE MainWindow function does not accept new object created by CreateNewObj function
// HERE
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::CreateNewObj(int row, int column, int rowSpan, int columnSpan)
{
QFrame *frame = new QFrame(this->ui->scrollAreaWidgetContents);
QVBoxLayout *verticalLayout;
verticalLayout = new QVBoxLayout(frame);
verticalLayout->setObjectName(QString::fromUtf8("verticalLayout_") + QString::number(row));
frame->setObjectName(QString::fromUtf8("frame_") + QString::number(row));
frame->setMinimumSize(QSize(100, 100));
frame->setMaximumSize(QSize(16777215, 50));
frame->setStyleSheet(QString::fromUtf8("background-color: rgb(255, 170, 127);"));
frame->setFrameShape(QFrame::StyledPanel);
frame->setFrameShadow(QFrame::Raised);
this->ui->gridLayout->addWidget(frame, row, column, rowSpan, columnSpan);
}
mainwindow.ui:

Answer 1

It should be something like:
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
QVBoxLayout *verticalLayout = new QVBoxLayout(ui->scrollAreaWidgetContents());
verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
for (int i = 0; i < 10; i++)
{
QFrame *frame = new QFrame(ui->scrollAreaWidgetContents());
frame->setObjectName(QString::fromUtf8("frame_") + QString::number(i));
frame->setMinimumSize(QSize(100, 100));
frame->setMaximumSize(QSize(16777215, 50));
frame->setStyleSheet(QString::fromUtf8("background-color: rgb(255, 170, 127);"));
frame->setFrameShape(QFrame::StyledPanel);
frame->setFrameShadow(QFrame::Raised);
verticalLayout->addWidget(frame, i, 0, 1, 1);
}
}