In this Video Tutorial we will show you how to develop an image viewer application  in QT C++.

The Image Viewer source code is this tutorial can used as a starting point to develop a lot of application related in this filed.

Watch the video tutorial from the link below..




Main Source Code

Mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QFileDialog>
#include <QLabel>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);

private:
    Ui::MainWindow *ui;



private slots:
    void on_frame_customContextMenuRequested(QPoint pos);
    void on_pushButtonBrowse_clicked();
};

#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);
    QPixmap pix("/home/rpi/Desktop/Picture/Sample Pictures/Chrysanthemum.jpg");
    ui->label_pic->setPixmap(pix);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
}

void MainWindow::on_pushButtonBrowse_clicked()
{
    QFileDialog dialog(this);
    dialog.setNameFilter(tr("Images (*.png *.xpm *.jpg)"));
    dialog.setViewMode(QFileDialog::Detail);
    QString fileName = QFileDialog::getOpenFileName(this,
       tr("Open Images"), "/home/rpi/Desktop/Picture/Sample Pictures", tr("Image Files (*.png *.jpg *.bmp)"));
    if (!fileName.isEmpty())
    {
         QImage image(fileName);
         ui->label_pic->setPixmap(QPixmap::fromImage(image));

    }


}

main.cpp

#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}