mainwindow.cpp

   1 #include "mainwindow.h"
   2 #include "ui_mainwindow.h"
   3
   4 QString dirLocation;
   5
   6 MainWindow::MainWindow(QWidget *parent) :
   7     QMainWindow(parent),
   8     ui(new Ui::MainWindow)
   9 {
  10
  11     ui->setupUi(this);
  12
  13
  14     currentIndex = 0;
  15
  16     QStringList filters;
  17     filters << "*.jpeg" << "*.jpg";
  18
  19     imagesDir = new QDir (dirLocation);
  20
  21     imagesDir->setFilter(QDir::Files);
  22     imagesDir->setNameFilters( filters);
  23     imagesDir->setSorting(QDir::Name);
  24     imagesList = imagesDir->entryList();
  25
  26
  27      ui->prevImage->setEnabled(false);
  28     if(imagesList.count() == 0 || imagesList.count() == 1) {
  29
  30         ui->nextImage->setEnabled(false);
  31
  32         if(imagesList.count() == 0) {
  33             ui->label->clear();
  34             ui->label->setText("No images found");
  35             ui->clearImages->setEnabled(false);
  36         }
  37     }
  38 }
  39
  40 MainWindow::~MainWindow()
  41 {
  42     delete ui;
  43 }
  44
  45
  46 void MainWindow::on_prevImage_clicked()
  47 {
  48     currentIndex--;
  49     if(currentIndex <= 0)
  50        ui->prevImage->setEnabled(false);
  51
  52     if(currentIndex < imagesList.count())
  53        ui->nextImage->setEnabled(true);
  54
  55     displayImage(currentIndex);
  56 }
  57
  58 void MainWindow::on_clearImages_clicked()
  59 {
  60
  61      QMessageBox::StandardButton reply;
  62      reply = QMessageBox::question(this,"Delete Confirmation","Delete image?",QMessageBox::Yes|QMessageBox::No);
  63
  64      if(reply == QMessageBox::No)
  65          return;
  66
  67      ui->nextImage->setEnabled(false);
  68      ui->prevImage->setEnabled(false);
  69
  70      QStringList clearList = imagesDir->entryList();
  71
  72
  73     imagesDir->remove(clearList[currentIndex]);
  74
  75     imagesDir->refresh();
  76
  77     imagesList = imagesDir->entryList();
  78
  79     currentIndex--;
  80
  81     if(currentIndex < 0)
  82         currentIndex = 0;
  83
  84     ui->nextImage->setEnabled(false);
  85     ui->prevImage->setEnabled(false);
  86
  87     if(imagesList.count() > 1 && imagesList.count() -1 > currentIndex)
  88         ui->nextImage->setEnabled(true);
  89
  90     if(currentIndex > 0)
  91         ui->prevImage->setEnabled(true);
  92
  93     if(imagesList.count() >= 1)
  94         displayImage(currentIndex);
  95     else {
  96         ui->clearImages->setEnabled(false);
  97         ui->label->clear();
  98         ui->label->setText("No images found");
  99     }
 100
 101
 102 }
 103
 104 void MainWindow::on_nextImage_clicked()
 105 {
 106     currentIndex++;
 107     if(currentIndex >= imagesList.size()-1)
 108        ui->nextImage->setEnabled(false);
 109
 110     ui->prevImage->setEnabled(true);
 111
 112     displayImage(currentIndex);
 113
 114 }
 115
 116 void MainWindow::displayImage(int index) {
 117
 118     int width = ui->label->width();
 119     int height = ui->label->height();
 120     QPixmap image;
 121     image.load(dirLocation+imagesList[index]);
 122     image = image.scaled(width,height,Qt::KeepAspectRatio);
 123     ui->label->setPixmap(image);
 124
 125 }
 126
 127 void MainWindow::on_pushButton_clicked()
 128 {
 129     this->close();
 130 }
 131 void MainWindow::resizeEvent(QResizeEvent *ev)
 132 {
 133     QMainWindow::resizeEvent(ev);
 134
 135     if(imagesList.count() > 0)
 136         displayImage(currentIndex);
 137 }