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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QApplication>
#include <QPixmap>
#include <QResizeEvent>
MainWindow::MainWindow(const QStringList &filePaths, QWidget *parent)
: QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
connect(ui->actionQuit, &QAction::triggered, qApp, &QApplication::quit);
if (!filePaths.isEmpty()) {
current.load(filePaths.first());
setWindowTitle(title_format.arg(filePaths.first()));
fit();
}
connect(ui->ori_toolButton, &QToolButton::clicked, [this]() { scale(1.0); });
connect(ui->fit_toolButton, &QToolButton::clicked, [this]() { fit(); });
connect(ui->scale_slider, &QSlider::sliderMoved,
[this](int value) { scale(static_cast<double>(value) / 100.0f); });
}
MainWindow::~MainWindow() { delete ui; }
void MainWindow::resizeEvent(QResizeEvent *event) {
fit();
QMainWindow::resizeEvent(event);
}
void MainWindow::fit() {
const auto pixmpSize = current.size();
const auto scaleSize =
pixmpSize.scaled(ui->scrollArea->viewport()->size(), Qt::KeepAspectRatio);
const int scale = std::min(scaleSize.width() * 100 / pixmpSize.width(),
scaleSize.height() * 100 / pixmpSize.height());
ui->label->setPixmap(
current.scaled(scaleSize, Qt::KeepAspectRatio, Qt::SmoothTransformation));
ui->scale_slider->setValue(scale);
ui->scale_label->setText(scale_format.arg(scale));
}
void MainWindow::scale(double scale) {
const auto scaleSize = current.size() * scale;
ui->label->setPixmap(
current.scaled(scaleSize, Qt::KeepAspectRatio, Qt::SmoothTransformation));
ui->scale_slider->setValue(scale * 100);
ui->scale_label->setText(scale_format.arg(scale * 100));
}
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