File indexing completed on 2024-05-12 04:19:49

 // vim: set tabstop=4 shiftwidth=4 expandtab:
 /*
 Gwenview: an image viewer
 Copyright 2011 Aurélien Gâteau <agateau@kde.org>
 
 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 2
 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, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
 
 */
 // Self
 #include <thumbnailview/dragpixmapgenerator.h>
 
 // Local
 #include "gwenview_lib_debug.h"
 #include <paintutils.h>
 
 // KF
 #include <KIconLoader>
 
 // Qt
 #include <QApplication>
 #include <QPainter>
 #include <QPalette>
 #include <QPixmap>
 #include <QtMath>
 
 namespace Gwenview
 {
 namespace DragPixmapGenerator
 {
 const int DRAG_THUMB_SIZE = KIconLoader::SizeHuge;
 const int SPREAD_ANGLE = 30;
 
 DragPixmap generate(const QList<QPixmap> &pixmaps, int totalCount)
 {
     DragPixmap out;
 
     const int extraSpace = DRAG_THUMB_SIZE / 4;
     const int maxHeight = qSqrt(qPow(DRAG_THUMB_SIZE + extraSpace, 2) + qPow(DRAG_THUMB_SIZE / 2, 2));
     out.pix = QPixmap(maxHeight * 2, maxHeight);
     out.pix.fill(Qt::transparent);
 
     QPainter painter(&out.pix);
     painter.translate(out.pix.width() / 2, out.pix.height());
 
     const int count = pixmaps.count();
     qreal delta = 0;
     if (count > 1) {
         painter.rotate(-SPREAD_ANGLE / 2);
         delta = SPREAD_ANGLE / (count - 1);
     }
 
     painter.setRenderHint(QPainter::Antialiasing);
     painter.setRenderHint(QPainter::SmoothPixmapTransform);
     // int index = 0;
     int maxX = 0;
     for (const QPixmap &pix : pixmaps) {
         QPixmap pix2 = pix.scaled(DRAG_THUMB_SIZE - 2, DRAG_THUMB_SIZE - 2, Qt::KeepAspectRatio, Qt::SmoothTransformation);
         QRect rect(-pix2.width() / 2, -pix2.height() - extraSpace, pix2.width(), pix2.height());
 
         if (!pix2.hasAlphaChannel()) {
             // Draw a thin white border around fully opaque pictures to give them a photo-like appearance
             painter.fillRect(rect.adjusted(-1, -1, 1, 1), Qt::white);
         }
         painter.drawPixmap(rect.topLeft(), pix2);
 
         QPoint topRight = painter.transform().map(rect.topRight());
         maxX = qMax(topRight.x(), maxX);
         /*
         painter.drawRect(-pix2.width() / 2, -pix2.height() - extraSpace, pix2.width(), pix2.height());
         painter.drawText(-pix2.width() / 2, -pix2.height() - extraSpace, pix2.width(), pix2.height(), Qt::AlignTop | Qt::AlignLeft, QString::number(index));
         index++;
         */
         painter.rotate(delta);
     }
     out.hotSpot = QPoint(out.pix.width() / 2, -extraSpace);
 
     if (count < totalCount) {
         painter.resetTransform();
         QString text = QString::number(totalCount);
         QRect rect = painter.fontMetrics().boundingRect(text);
         if (rect.width() < rect.height()) {
             rect.setWidth(rect.height());
         }
 
         const int padding = 1;
         rect.moveRight(maxX - padding - 1);
         rect.moveBottom(out.pix.height() - padding - 1);
 
         // Background
         QColor bg1 = QApplication::palette().color(QPalette::Highlight);
         QColor bg2 = PaintUtils::adjustedHsv(bg1, 0, 0, -50);
         QLinearGradient gradient(0, rect.top(), 0, rect.bottom());
         gradient.setColorAt(0, bg1);
         gradient.setColorAt(1, bg2);
         painter.setBrush(gradient);
         painter.setPen(bg1);
         painter.translate(-.5, -.5);
         painter.drawRoundedRect(rect.adjusted(-padding, -padding, padding, padding), padding, padding);
 
         // Foreground
         painter.setPen(QApplication::palette().color(QPalette::HighlightedText));
         painter.drawText(rect, Qt::AlignCenter, text);
     }
 
     return out;
 }
 
 } // DragPixmapGenerator namespace
 
 } // namespace