1 files changed, 131 insertions, 0 deletions
diff --git a/src/dialogs/ImageOverlay.cc b/src/dialogs/ImageOverlay.cc
new file mode 100644
index 00000000..1e30b3ff
--- /dev/null
+++ b/src/dialogs/ImageOverlay.cc
@@ -0,0 +1,131 @@
+/*
+ * 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();
+}