#include "mainwindow.h"
#include <QVBoxLayout>
#include <QHeaderView>
#include <QSplitter>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QWidget *pWidget = new QWidget(this); //centra widget
    m_pTable = new QTableWidget(m_nRows,m_nCols);

    /* if you set ResizeMode to QHeaderView::ResizeToContents, it takes a long time to show the table.
     * It will be much more better if you use the other modes such as QHeaderView::Interactive, QHeaderView::Fixed or QHeaderView::Stretch.
    */
    m_pTable->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);

    m_pShowBtn = new QPushButton(tr("show"));
    connect(m_pShowBtn,SIGNAL(pressed()),this,SLOT(ShowTableItems()));

    QHBoxLayout *pHbox = new QHBoxLayout;
    pHbox->addStretch();
    pHbox->addWidget(m_pShowBtn);
    QVBoxLayout *pVbox = new QVBoxLayout;
    pVbox->addWidget(m_pTable);
    pVbox->addLayout(pHbox);
    pWidget->setLayout(pVbox);
    this->setCentralWidget(pWidget);
}

MainWindow::~MainWindow()
{

}

void MainWindow::ShowTableItems()
{
    m_pTable->clearContents();
    for(int i = 0; i < m_nRows; i++)
    {
       for(int j = 0; j < m_nCols; j++)
       {
          m_pTable->setItem(i,j,new QTableWidgetItem("data_"+ QString::number(m_nCols*i+j+1)));
       }
    }
}