imagepreview.cpp

#include "imagepreview.h"

imagePreview::imagePreview(QWidget *parent) : QWidget(parent, Qt::Window) {
  layout = new QVBoxLayout(this);
  image = new QLabel("Wrong image chosen");
  image->setStyleSheet("QLabel { background-color : black; }");
  image->setAlignment(Qt::AlignCenter);
  image->setContentsMargins(0, 0, 0, 0);
  layout->addWidget(image);
  showing = false;
  isFullScreen = false;
  this->setGeometry(50, 50, image->width(), image->height());
}

void imagePreview::showImage(QString path) {
  updateImage(path);
  showing = true;
  this->show();
}

void imagePreview::updateImage(QPixmap im) {
  int height = (static_cast<myWindows *>(this->parent()))->screenH;
  int width = (static_cast<myWindows *>(this->parent()))->screenW;

  QPixmap tmp;
  // Replace all of that by some computation on size and do one resize only
  if (im.height() > height) {
    tmp = im.scaledToHeight(height - 20, Qt::SmoothTransformation);
  } else {
    tmp = im;
  }
  if (tmp.width() > width) {
    image->setPixmap(tmp.scaledToWidth(width - 50, Qt::SmoothTransformation));
  } else {
    image->setPixmap(tmp);
  }
  if (!isFullScreen) {
    this->adjustSize();
  }
}

// This function is called when we want to have the opposite effect as the
// actual one Hided -> Shown Shown -> Hided
void imagePreview::hidePreview() {
  if (isFullScreen) {
    fullScreen();
  }
  this->hide();
  showing = false;
}

// Same idea that hidePreview: we got from fullScreen to normal or vice versa
// according to actual state
void imagePreview::fullScreen() {
  if (isFullScreen) {
    this->showNormal();
  } else {
    this->showFullScreen();
  }
  isFullScreen = !isFullScreen;
}

// If the user close manually the preview windows
void imagePreview::closeEvent(QCloseEvent *) { showing = false; }