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/*
* nheko Copyright (C) 2017 Konstantinos Sideris <siderisk@auth.gr>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QApplication>
#include <QDesktopWidget>
#include <QPainter>
#include "dialogs/ImageOverlay.h"
using namespace dialogs;
ImageOverlay::ImageOverlay(QPixmap image, QWidget *parent)
: QWidget{parent}
, originalImage_{image}
{
setMouseTracking(true);
setParent(0);
setWindowFlags(windowFlags() | Qt::FramelessWindowHint);
setAttribute(Qt::WA_NoSystemBackground, true);
setAttribute(Qt::WA_TranslucentBackground, true);
setAttribute(Qt::WA_DeleteOnClose, true);
setWindowState(Qt::WindowFullScreen);
screen_ = QApplication::desktop()->availableGeometry();
move(QApplication::desktop()->mapToGlobal(screen_.topLeft()));
resize(screen_.size());
connect(this, SIGNAL(closing()), this, SLOT(close()));
raise();
}
// TODO: Move this into Utils
void
ImageOverlay::scaleImage(int max_width, int max_height)
{
if (originalImage_.isNull())
return;
auto width_ratio = (double)max_width / (double)originalImage_.width();
auto height_ratio = (double)max_height / (double)originalImage_.height();
auto min_aspect_ratio = std::min(width_ratio, height_ratio);
int final_width = 0;
int final_height = 0;
if (min_aspect_ratio > 1) {
final_width = originalImage_.width();
final_height = originalImage_.height();
} else {
final_width = originalImage_.width() * min_aspect_ratio;
final_height = originalImage_.height() * min_aspect_ratio;
}
image_ = originalImage_.scaled(
final_width, final_height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
void
ImageOverlay::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
// Full screen overlay.
painter.fillRect(QRect(0, 0, screen_.width(), screen_.height()), QColor(55, 55, 55, 170));
// Left and Right margins
int outer_margin = screen_.width() * 0.12;
int buttonSize = 36;
int margin = outer_margin * 0.1;
int max_width = screen_.width() - 2 * outer_margin;
int max_height = screen_.height();
scaleImage(max_width, max_height);
int diff_x = max_width - image_.width();
int diff_y = max_height - image_.height();
content_ = QRect(outer_margin + diff_x / 2, diff_y / 2, image_.width(), image_.height());
close_button_ =
QRect(screen_.width() - margin - buttonSize, margin, buttonSize, buttonSize);
// Draw main content_.
painter.drawPixmap(content_, image_);
// Draw top right corner X.
QPen pen;
pen.setCapStyle(Qt::RoundCap);
pen.setWidthF(5);
pen.setColor("gray");
auto center = close_button_.center();
painter.setPen(pen);
painter.drawLine(center - QPointF(15, 15), center + QPointF(15, 15));
painter.drawLine(center + QPointF(15, -15), center - QPointF(15, -15));
}
void
ImageOverlay::mousePressEvent(QMouseEvent *event)
{
if (event->button() != Qt::LeftButton)
return;
if (close_button_.contains(event->pos()))
emit closing();
else if (!content_.contains(event->pos()))
emit closing();
}
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