Read multiple texts Qt - qt

Question

i am doing Qt project about displaying many texts. in detail, after 1st text display, it will close then display next file. My problem here was that just the last file displayed. all link resource paths are correct. Please help me fix me. Thanks in advance
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QTextStream>
#include <QMessageBox>
#include <QString>
#include <QStackedWidget>
#include <QTextBrowser>
#include <QStringList>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QStringList L;
L << ":/sample.txt" << ":/idp.txt";
foreach (QString str, L){
QFile file(str);
if (!file.open(QIODevice::ReadOnly))
QMessageBox::information(0,"error file path", file.errorString());
QString name = file.fileName();
QStringList parts = name.split("/");
QString lastBit = parts.at(parts.size()-1);
statusBar()->showMessage(lastBit);
QTextStream out(&file);
QString txt = out.readAll();
QStackedWidget *temp = new QStackedWidget();
QTextBrowser *textbrs = new QTextBrowser();
textbrs->setText(txt);
temp->addWidget(textbrs);
setCentralWidget(temp);
file.close();
}
}
MainWindow::~MainWindow()
{
delete ui;
}

Answer 1

Something like this:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QTextStream>
#include <QMessageBox>
#include <QString>
#include <QStackedWidget>
#include <QTextBrowser>
#include <QStringList>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
L << ":/sample.txt" << ":/idp.txt"; //Class member of Type QStringList
textbrs = new QTextBrowser(); //Class member of Type QTextBrowser*
ui->centralWidget->layout()->addWidget(textbrs);
timer = new QTimer(); //Class member of Type QTimer*
timer->setInterval(5000);
connect(timer,SIGNAL(timeout()),this,SLOT(slotFileAction()));
timer->start();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::slotFileAction()
{
static int count = 0;
if(count >= L.size())
timer->stop();
QString str = L.at(count);
count++;
QFile file(str);
if (!file.open(QIODevice::ReadOnly))
QMessageBox::information(0,"error file path", file.errorString());
QString name = file.fileName();
QStringList parts = name.split("/");
QString lastBit = parts.at(parts.size()-1);
statusBar()->showMessage(lastBit);
QTextStream out(&file);
QString txt = out.readAll();
textbrs->setText(txt);
file.close();
}

Answer 2

Each time you will replace the old QStackedWidget by
setCentralWidget(temp);
The example to use QStackedWidget in Qt help document is following:
QWidget *firstPageWidget = new QWidget;
QWidget *secondPageWidget = new QWidget;
QWidget *thirdPageWidget = new QWidget;
QStackedWidget *stackedWidget = new QStackedWidget;
stackedWidget->addWidget(firstPageWidget);
stackedWidget->addWidget(secondPageWidget);
stackedWidget->addWidget(thirdPageWidget);
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(stackedWidget);
setLayout(layout);
So, you should add multiple QTextBrowsers in QStackedWidget by addWidget() and use setCentralWiget() just once.
Hope helpful.