mirror of https://github.com/qTox/qTox.git
Anthony Bilinski
5 years ago
12 changed files with 232 additions and 81 deletions
@ -0,0 +1,125 @@ |
|||||||
|
/*
|
||||||
|
Copyright © 2020 by The qTox Project Contributors |
||||||
|
|
||||||
|
This file is part of qTox, a Qt-based graphical interface for Tox. |
||||||
|
|
||||||
|
qTox is libre 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. |
||||||
|
|
||||||
|
qTox 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 qTox. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/ |
||||||
|
|
||||||
|
#include "imagepreviewwidget.h" |
||||||
|
#include "src/model/exiftransform.h" |
||||||
|
|
||||||
|
#include <QFile> |
||||||
|
#include <QFileInfo> |
||||||
|
#include <QString> |
||||||
|
#include <QApplication> |
||||||
|
#include <QDesktopWidget> |
||||||
|
#include <QBuffer> |
||||||
|
|
||||||
|
namespace |
||||||
|
{ |
||||||
|
QPixmap pixmapFromFile(const QString& filename) |
||||||
|
{ |
||||||
|
static const QStringList previewExtensions = {"png", "jpeg", "jpg", "gif", "svg", |
||||||
|
"PNG", "JPEG", "JPG", "GIF", "SVG"}; |
||||||
|
|
||||||
|
if (!previewExtensions.contains(QFileInfo(filename).suffix())) { |
||||||
|
return QPixmap(); |
||||||
|
} |
||||||
|
|
||||||
|
QFile imageFile(filename); |
||||||
|
if (!imageFile.open(QIODevice::ReadOnly)) { |
||||||
|
return QPixmap(); |
||||||
|
} |
||||||
|
|
||||||
|
const QByteArray imageFileData = imageFile.readAll(); |
||||||
|
QImage image = QImage::fromData(imageFileData); |
||||||
|
auto orientation = ExifTransform::getOrientation(imageFileData); |
||||||
|
image = ExifTransform::applyTransformation(image, orientation); |
||||||
|
|
||||||
|
return QPixmap::fromImage(image); |
||||||
|
} |
||||||
|
|
||||||
|
QPixmap scaleCropIntoSquare(const QPixmap& source, const int targetSize) |
||||||
|
{ |
||||||
|
QPixmap result; |
||||||
|
|
||||||
|
// Make sure smaller-than-icon images (at least one dimension is smaller) will not be
|
||||||
|
// upscaled
|
||||||
|
if (source.width() < targetSize || source.height() < targetSize) { |
||||||
|
result = source; |
||||||
|
} else { |
||||||
|
result = source.scaled(targetSize, targetSize, Qt::KeepAspectRatioByExpanding, |
||||||
|
Qt::SmoothTransformation); |
||||||
|
} |
||||||
|
|
||||||
|
// Then, image has to be cropped (if needed) so it will not overflow rectangle
|
||||||
|
// Only one dimension will be bigger after Qt::KeepAspectRatioByExpanding
|
||||||
|
if (result.width() > targetSize) { |
||||||
|
return result.copy((result.width() - targetSize) / 2, 0, targetSize, targetSize); |
||||||
|
} else if (result.height() > targetSize) { |
||||||
|
return result.copy(0, (result.height() - targetSize) / 2, targetSize, targetSize); |
||||||
|
} |
||||||
|
|
||||||
|
// Picture was rectangle in the first place, no cropping
|
||||||
|
return result; |
||||||
|
} |
||||||
|
|
||||||
|
QString getToolTipDisplayingImage(const QPixmap& image) |
||||||
|
{ |
||||||
|
// Show mouseover preview, but make sure it's not larger than 50% of the screen
|
||||||
|
// width/height
|
||||||
|
const QRect desktopSize = QApplication::desktop()->geometry(); |
||||||
|
const int maxPreviewWidth{desktopSize.width() / 2}; |
||||||
|
const int maxPreviewHeight{desktopSize.height() / 2}; |
||||||
|
const QPixmap previewImage = [&image, maxPreviewWidth, maxPreviewHeight]() { |
||||||
|
if (image.width() > maxPreviewWidth || image.height() > maxPreviewHeight) { |
||||||
|
return image.scaled(maxPreviewWidth, maxPreviewHeight, Qt::KeepAspectRatio, |
||||||
|
Qt::SmoothTransformation); |
||||||
|
} else { |
||||||
|
return image; |
||||||
|
} |
||||||
|
}(); |
||||||
|
|
||||||
|
QByteArray imageData; |
||||||
|
QBuffer buffer(&imageData); |
||||||
|
buffer.open(QIODevice::WriteOnly); |
||||||
|
previewImage.save(&buffer, "PNG"); |
||||||
|
buffer.close(); |
||||||
|
|
||||||
|
return "<img src=data:image/png;base64," + imageData.toBase64() + "/>"; |
||||||
|
} |
||||||
|
|
||||||
|
} // namespace
|
||||||
|
|
||||||
|
void ImagePreviewButton::initialize(const QPixmap& image) |
||||||
|
{ |
||||||
|
auto desiredSize = qMin(width(), height()); // Assume widget is a square
|
||||||
|
desiredSize = qMax(desiredSize, 4) - 4; // Leave some room for a border
|
||||||
|
|
||||||
|
auto croppedImage = scaleCropIntoSquare(image, desiredSize); |
||||||
|
setIcon(QIcon(croppedImage)); |
||||||
|
setIconSize(croppedImage.size()); |
||||||
|
setToolTip(getToolTipDisplayingImage(image)); |
||||||
|
} |
||||||
|
|
||||||
|
void ImagePreviewButton::setIconFromFile(const QString& filename) |
||||||
|
{ |
||||||
|
initialize(pixmapFromFile(filename)); |
||||||
|
} |
||||||
|
|
||||||
|
void ImagePreviewButton::setIconFromPixmap(const QPixmap& pixmap) |
||||||
|
{ |
||||||
|
initialize(pixmap); |
||||||
|
} |
||||||
@ -0,0 +1,37 @@ |
|||||||
|
/*
|
||||||
|
Copyright © 2020 by The qTox Project Contributors |
||||||
|
|
||||||
|
This file is part of qTox, a Qt-based graphical interface for Tox. |
||||||
|
|
||||||
|
qTox is libre 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. |
||||||
|
|
||||||
|
qTox 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 qTox. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/ |
||||||
|
|
||||||
|
#pragma once |
||||||
|
|
||||||
|
#include <QPushButton> |
||||||
|
#include <QPixmap> |
||||||
|
#include <QString> |
||||||
|
|
||||||
|
class ImagePreviewButton : public QPushButton |
||||||
|
{ |
||||||
|
public: |
||||||
|
ImagePreviewButton(QWidget* parent = nullptr) |
||||||
|
: QPushButton(parent) |
||||||
|
{} |
||||||
|
|
||||||
|
void setIconFromFile(const QString& filename); |
||||||
|
void setIconFromPixmap(const QPixmap& image); |
||||||
|
private: |
||||||
|
void initialize(const QPixmap& image); |
||||||
|
}; |
||||||
Loading…
Reference in new issue