137 lines
3.2 KiB
C++
137 lines
3.2 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <QLabel>
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#include <QPixmap>
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#include <QBitmap>
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#include <QKeyEvent>
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#include <QGraphicsBlurEffect>
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#include <libexif/exif-data.h>
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#include <iostream>
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MainWindow::MainWindow(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::MainWindow),
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image(new QLabel)
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{
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ui->setupUi(this);
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setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
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QMainWindow::showFullScreen();
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QApplication::setOverrideCursor(Qt::BlankCursor);
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QLabel *label = this->findChild<QLabel*>("image");
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setCentralWidget(label);
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label->setStyleSheet("QLabel { background-color: rgba(0, 0, 0, 180);}");
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label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
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update();
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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}
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void MainWindow::keyPressEvent(QKeyEvent* event)
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{
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if(event->key() == Qt::Key_Escape)
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{
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QCoreApplication::quit();
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}
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else
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QWidget::keyPressEvent(event);
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}
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void MainWindow::resizeEvent(QResizeEvent* event)
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{
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QMainWindow::resizeEvent(event);
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updateImage();
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}
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void MainWindow::setImage(std::string path)
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{
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currentImage = path;
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updateImage();
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}
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int MainWindow::getImageRotation()
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{
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if (currentImage == "")
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return 0;
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int orientation = 0;
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ExifData *exifData = exif_data_new_from_file(currentImage.c_str());
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if (exifData)
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{
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ExifByteOrder byteOrder = exif_data_get_byte_order(exifData);
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ExifEntry *exifEntry = exif_data_get_entry(exifData, EXIF_TAG_ORIENTATION);
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if (exifEntry)
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{
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orientation = exif_get_short(exifEntry->data, byteOrder);
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}
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exif_data_free(exifData);
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}
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int degrees = 0;
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switch(orientation) {
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case 8:
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degrees = 270;
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break;
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case 3:
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degrees = 180;
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break;
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case 6:
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degrees = 90;
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break;
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}
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return degrees;
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}
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void MainWindow::updateImage()
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{
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if (currentImage == "")
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return;
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QPixmap p( currentImage.c_str() );
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QPixmap rotated = getRotatedPixmap(p);
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QPixmap scaled = getScaledPixmap(rotated);
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QLabel *label = this->findChild<QLabel*>("image");
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label->setPixmap(scaled);
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drawBackground(rotated, scaled);
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update();
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}
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QPixmap MainWindow::getRotatedPixmap(const QPixmap& p)
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{
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QMatrix matrix;
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matrix.rotate(getImageRotation());
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return p.transformed(matrix);
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}
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QPixmap MainWindow::getScaledPixmap(const QPixmap& p)
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{
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int w = width();
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int h = height();
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return p.scaled(w, h, Qt::KeepAspectRatio);
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}
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void MainWindow::drawBackground(const QPixmap& originalSize, const QPixmap& scaled)
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{
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QPalette palette;
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if (scaled.width() < width()) {
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QPixmap background = originalSize.scaledToWidth(width());
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QRect rect(0, (background.height() - height())/2, width(), height());
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background = background.copy(rect);
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palette.setBrush(QPalette::Background, background);
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} else {
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QPixmap background = originalSize.scaledToHeight(height());
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QRect rect((background.width() - width())/2, 0, width(), height());
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background = background.copy(rect);
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palette.setBrush(QPalette::Background, background);
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}
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this->setPalette(palette);
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}
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