Creating a 10x10 field of pushButtons - c++

Question

Hey I want to create a 8x8 field of pushButtons. When using this Code
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QVector>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
QGridLayout* layout = new QGridLayout();
ui->centralwidget->setLayout(layout);
QVector<QVector<QPushButton*>> buttons2DVector(8);
for (int i=0;i<8;i++){
buttons2DVector[i].resize(8);
for(int j=0;j<8;j++){
QPushButton *b = new QPushButton("button");
layout->addWidget(b,i,j);
buttons2DVector[i][j] = b;
}
}
the error is:
unknown type Name "QGridLayout"
unknown type Name "ui"
the Code was given to me but I dont know how to use it properly. As you can probably see I am a beginner in QT and C++ but it would be nice if someone could help me.

Answer 1

Assuming you added the following to your MainWindow class declaration:
QVector<QVector<QPushButton*>> buttons2DVector(8);
void createGrid();
You could create the grid programmatically as follows:
#include "mainwindow.h"
#include <QVector>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
createGrid();
}
void MainWindow::createGrid() {
QFrame *frame = new QFrame(this);
QGridLayout *layout = new QGridLayout(frame);
for (int i=0;i<8;i++){
buttons2DVector[i].resize(8);
for(int j=0;j<8;j++){
QPushButton *b = new QPushButton("button", layout);
layout->addWidget(b,i,j);
buttons2DVector[i][j] = b;
}
}
setCentralWidget(frame);
}