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ImageViewer.cpp
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/*
* Copyright (C) 2013-2014 Ofer Kashayov - oferkv@live.com
* This file is part of Phototonic Image Viewer.
*
* Phototonic 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.
*
* Phototonic 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 Phototonic. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QApplication>
#include <QCheckBox>
#include <QClipboard>
#include <QDir>
#include <QFileDialog>
#include <QFileInfo>
#include <QImageReader>
#include <QLabel>
#include <QLoggingCategory>
#include <QMenu>
#include <QMouseEvent>
#include <QMovie>
#include <QPainter>
#include <QScrollBar>
#include <QThread>
#include <QTimer>
#include <QWheelEvent>
#include "CropDialog.h"
#include "CropRubberband.h"
#include "ImageWidget.h"
#include "ImageViewer.h"
#include "MessageBox.h"
#include "MetadataCache.h"
#include "Settings.h"
#define CLIPBOARD_IMAGE_NAME "clipboard.png"
#define ROUND(x) ((int) ((x) + 0.5))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
namespace { // anonymous, not visible outside of this file
Q_DECLARE_LOGGING_CATEGORY(PHOTOTONIC_EXIV2_LOG)
Q_LOGGING_CATEGORY(PHOTOTONIC_EXIV2_LOG, "phototonic.exif", QtCriticalMsg)
struct Exiv2LogHandler {
static void handleMessage(int level, const char *message) {
switch(level) {
case Exiv2::LogMsg::debug:
qCDebug(PHOTOTONIC_EXIV2_LOG) << message;
break;
case Exiv2::LogMsg::info:
qCInfo(PHOTOTONIC_EXIV2_LOG) << message;
break;
case Exiv2::LogMsg::warn:
case Exiv2::LogMsg::error:
case Exiv2::LogMsg::mute:
qCWarning(PHOTOTONIC_EXIV2_LOG) << message;
break;
default:
qCWarning(PHOTOTONIC_EXIV2_LOG) << "unhandled log level" << level << message;
break;
}
}
Exiv2LogHandler() {
Exiv2::LogMsg::setHandler(&Exiv2LogHandler::handleMessage);
}
};
class ClickToClose : public QObject {
public:
ClickToClose() : QObject() {}
protected:
bool eventFilter(QObject *o, QEvent *e) {
if (e->type() == QEvent::MouseButtonRelease)
static_cast<QWidget*>(o)->hide();
return false;
}
};
} // anonymous namespace
ClickToClose *gs_clickToClose = nullptr;
ImageViewer::ImageViewer(QWidget *parent) : QScrollArea(parent) {
// This is a threadsafe way to ensure that we only register it once
static Exiv2LogHandler handler;
if (!gs_clickToClose)
gs_clickToClose = new ClickToClose;
m_letterbox = QRect(QPoint(0,0), QPoint(100,100));
myContextMenu = nullptr;
cursorIsHidden = false;
moveImageLocked = false;
myMirrorLayout = MirrorNone;
imageWidget = new ImageWidget;
imageWidget->setLetterbox(m_letterbox);
m_crossfade = false;
imageWidget->setCrossfade(m_crossfade);
animation = nullptr;
setContentsMargins(0, 0, 0, 0);
setAlignment(Qt::AlignCenter);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setFrameStyle(0);
setWidget(imageWidget);
setWidgetResizable(false);
setBackgroundColor();
myFilenameLabel = new QLabel(this);
myFilenameLabel->setVisible(Settings::showImageName);
myFilenameLabel->setMargin(3);
myFilenameLabel->move(10, 10);
myFilenameLabel->setAutoFillBackground(true);
myFilenameLabel->setFrameStyle(QFrame::Plain|QFrame::NoFrame);
QPalette pal = myFilenameLabel->palette();
pal.setColor(myFilenameLabel->backgroundRole(), QColor(0,0,0,128));
pal.setColor(myFilenameLabel->foregroundRole(), QColor(255,255,255,128));
myFilenameLabel->setPalette(pal);
feedbackLabel = new QLabel(this);
feedbackLabel->setVisible(false);
feedbackLabel->setMargin(3);
feedbackLabel->setFrameStyle(QFrame::Plain|QFrame::NoFrame);
feedbackLabel->setAutoFillBackground(true);
feedbackLabel->setPalette(pal);
feedbackLabel->installEventFilter(gs_clickToClose);
mouseMovementTimer = new QTimer(this);
connect(mouseMovementTimer, SIGNAL(timeout()), this, SLOT(monitorCursorState()));
Settings::hueVal = 0;
Settings::saturationVal = 100;
Settings::lightnessVal = 100;
Settings::hueRedChannel = true;
Settings::hueGreenChannel = true;
Settings::hueBlueChannel = true;
Settings::contrastVal = 78;
Settings::brightVal = 100;
Settings::dialogLastX = Settings::dialogLastY = 0;
Settings::mouseRotateEnabled = false;
newImage = false;
cropRubberBand = 0;
}
static unsigned int getHeightByWidth(int imgWidth, int imgHeight, int newWidth) {
return qRound(imgHeight * newWidth / double(imgWidth));
}
static unsigned int getWidthByHeight(int imgHeight, int imgWidth, int newHeight) {
return qRound(imgWidth * newHeight / double(imgHeight));
}
static inline int calcZoom(int size) {
return qRound(size * Settings::imageZoomFactor);
}
void ImageViewer::resizeImage(QPoint focus) {
static bool busy = false;
if (busy)
return;
QSize imageSize = animation ? animation->currentPixmap().size() : imageWidget->image().size();
if (imageSize.isEmpty())
return;
busy = true;
QSize originalImageSize = imageSize;
imageSize *= Settings::imageZoomFactor;
if (tempDisableResize) { // calcZoom to identity
Settings::imageZoomFactor = 1.0;
}
switch (Settings::zoomInFlags) {
case Disable:
if (imageSize.width() <= width() && imageSize.height() <= height()) {
imageSize.scale(calcZoom(imageSize.width()), calcZoom(imageSize.height()), Qt::KeepAspectRatio);
}
break;
case WidthAndHeight:
if (imageSize.width() <= width() && imageSize.height() <= height()) {
imageSize.scale(calcZoom(width()), calcZoom(height()), Qt::KeepAspectRatio);
}
break;
case Width:
if (imageSize.width() <= width()) {
imageSize.scale(calcZoom(width()), calcZoom(getHeightByWidth(imageSize.width(), imageSize.height(), width())), Qt::KeepAspectRatio);
}
break;
case Height:
if (imageSize.height() <= height()) {
imageSize.scale(calcZoom(getWidthByHeight(imageSize.height(), imageSize.width(), height())), calcZoom(height()), Qt::KeepAspectRatio);
}
break;
case Disprop:
imageSize.scale(calcZoom(qMax(imageSize.width(), width())), calcZoom(qMax(imageSize.height(), height())), Qt::IgnoreAspectRatio);
break;
}
switch (Settings::zoomOutFlags) {
case Disable:
if (imageSize.width() >= width() || imageSize.height() >= height()) {
imageSize.scale(calcZoom(imageSize.width()), calcZoom(imageSize.height()), Qt::KeepAspectRatio);
}
break;
case WidthAndHeight:
if (imageSize.width() >= width() || imageSize.height() >= height()) {
imageSize.scale(calcZoom(width()), calcZoom(height()), Qt::KeepAspectRatio);
}
break;
case Width:
if (imageSize.width() >= width()) {
imageSize.scale(calcZoom(width()), calcZoom(getHeightByWidth(imageSize.width(), imageSize.height(), width())), Qt::KeepAspectRatio);
}
break;
case Height:
if (imageSize.height() >= height()) {
imageSize.scale(calcZoom(getWidthByHeight(imageSize.height(), imageSize.width(), height())), calcZoom(height()), Qt::KeepAspectRatio);
}
break;
case Disprop:
imageSize.scale(calcZoom(qMin(imageSize.width(), width())), calcZoom(qMin(imageSize.height(), height())), Qt::IgnoreAspectRatio);
break;
}
if (tempDisableResize) {
Settings::imageZoomFactor = (float(originalImageSize.width())/imageSize.width() +
float(originalImageSize.height())/imageSize.height())/2.0;
imageSize = originalImageSize;
imageSize.scale(imageSize.width(), imageSize.height(), Qt::KeepAspectRatio);
}
if (imageWidget) {
Qt::Orientations orient;
if (Settings::flipH) orient |= Qt::Horizontal;
if (Settings::flipV) orient |= Qt::Vertical;
imageWidget->setFlip(orient);
imageWidget->setRotation(Settings::rotation);
imageWidget->setFixedSize(size());
if (imageSize.width() < width() || imageSize.height() < height()) {
centerImage(imageSize);
} else {
const double fx = double(imageSize.width())/imageWidget->imageSize().width(),
fy = double(imageSize.height())/imageWidget->imageSize().height();
int x,y;
if (focus.x() > -1 && focus.y() > -1) {
x = qRound(fx*(imageWidget->imagePosition().x() - focus.x()) + focus.x());
y = qRound(fy*(imageWidget->imagePosition().y() - focus.y()) + focus.y());
} else {
x = qRound(imageWidget->imagePosition().x()*fx);
y = qRound(imageWidget->imagePosition().y()*fy);
}
if (imageSize.width() >= width())
x = qMax(qMin(x, 0), width() - imageSize.width());
if (imageSize.height() >= height())
y = qMax(qMin(y, 0), height() - imageSize.height());
imageWidget->setImagePosition(QPoint(x,y));
}
imageWidget->setImageSize(imageSize);
} else {
widget()->setFixedSize(imageSize);
// widget()->adjustSize();
if (imageSize.width() < width() + 100 || imageSize.height() < height() + 100) {
centerImage(imageSize);
} else {
float positionY = verticalScrollBar()->value() > 0 ? verticalScrollBar()->value() / float(verticalScrollBar()->maximum()) : 0;
float positionX = horizontalScrollBar()->value() > 0 ? horizontalScrollBar()->value() / float(horizontalScrollBar()->maximum()) : 0;
horizontalScrollBar()->setValue(horizontalScrollBar()->maximum() * positionX);
verticalScrollBar()->setValue(verticalScrollBar()->maximum() * positionY);
}
}
busy = false;
}
void ImageViewer::scaleImage(QSize newSize) {
origImage = origImage.scaled(newSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
refresh();
setFeedback(tr("New image size: %1x%2").arg(origImage.width()).arg(origImage.height()));
}
void ImageViewer::resizeEvent(QResizeEvent *event) {
QWidget::resizeEvent(event);
resizeImage();
}
void ImageViewer::showEvent(QShowEvent *event) {
QWidget::showEvent(event);
resizeImage();
}
void ImageViewer::centerImage(QSize imgSize) {
if (imageWidget) {
imageWidget->setImagePosition(QPoint((imageWidget->width() - imgSize.width())/2, (imageWidget->height() - imgSize.height())/2));
} else {
ensureVisible(imgSize.width()/2, imgSize.height()/2, width()/2, height()/2);
}
}
void ImageViewer::mirror() {
switch (myMirrorLayout) {
case MirrorDual: {
mirrorImage = QImage(viewerImage.width() * 2, viewerImage.height(),
QImage::Format_ARGB32);
QPainter painter(&mirrorImage);
painter.drawImage(0, 0, viewerImage);
painter.drawImage(viewerImage.width(), 0, viewerImage.mirrored(true, false));
break;
}
case MirrorTriple: {
mirrorImage = QImage(viewerImage.width() * 3, viewerImage.height(),
QImage::Format_ARGB32);
QPainter painter(&mirrorImage);
painter.drawImage(0, 0, viewerImage);
painter.drawImage(viewerImage.width(), 0, viewerImage.mirrored(true, false));
painter.drawImage(viewerImage.width() * 2, 0, viewerImage.mirrored(false, false));
break;
}
case MirrorQuad: {
mirrorImage = QImage(viewerImage.width() * 2, viewerImage.height() * 2,
QImage::Format_ARGB32);
QPainter painter(&mirrorImage);
painter.drawImage(0, 0, viewerImage);
painter.drawImage(viewerImage.width(), 0, viewerImage.mirrored(true, false));
painter.drawImage(0, viewerImage.height(), viewerImage.mirrored(false, true));
painter.drawImage(viewerImage.width(), viewerImage.height(),
viewerImage.mirrored(true, true));
break;
}
case MirrorVDual: {
mirrorImage = QImage(viewerImage.width(), viewerImage.height() * 2,
QImage::Format_ARGB32);
QPainter painter(&mirrorImage);
painter.drawImage(0, 0, viewerImage);
painter.drawImage(0, viewerImage.height(), viewerImage.mirrored(false, true));
break;
}
default: break;
}
viewerImage = mirrorImage;
static int nag_counter = 0;
if (myMirrorLayout != MirrorNone && ++nag_counter < 9)
setFeedback("<h1>Hello there.</h1><h4>Yes you behind the monitor.</h4>"
"<h2>I'm talking to you!</h2>"
"<p>Since you're using this you probably have an idea<br>"
"what this is supposed to be good for?</p>"
"<p>Do you mind filing a bug that explains the feature?<br>"
"Otherwise it might easily hit the curb for the final release.</p>"
"<p>Thanks<br>"
"You can hide this message by clicking on it.</p>", false);
else
setFeedback("", false);
}
void ImageViewer::setMirror(MirrorLayout layout) {
myMirrorLayout = layout;
refresh();
switch (myMirrorLayout) {
case MirrorNone: setFeedback(tr("Mirror Disabled")); break;
case MirrorDual: setFeedback(tr("Mirror: Dual")); break;
case MirrorTriple: setFeedback(tr("Mirror: Triple")); break;
case MirrorQuad: setFeedback(tr("Mirror: Quad")); break;
case MirrorVDual: setFeedback(tr("Mirror: Dual Vertical")); break;
default: qDebug() << "invalid mirror layout" << layout;
}
}
static inline int bound0To255(int val) {
return ((val > 255) ? 255 : (val < 0) ? 0 : val);
}
static inline int hslValue(double n1, double n2, double hue) {
double value;
if (hue > 255) {
hue -= 255;
} else if (hue < 0) {
hue += 255;
}
if (hue < 42.5) {
value = n1 + (n2 - n1) * (hue / 42.5);
} else if (hue < 127.5) {
value = n2;
} else if (hue < 170) {
value = n1 + (n2 - n1) * ((170 - hue) / 42.5);
} else {
value = n1;
}
return ROUND(value * 255.0);
}
void rgbToHsl(int r, int g, int b, unsigned char *hue, unsigned char *sat, unsigned char *light) {
double h, s, l;
int min, max;
int delta;
if (r > g) {
max = MAX(r, b);
min = MIN(g, b);
} else {
max = MAX(g, b);
min = MIN(r, b);
}
l = (max + min) / 2.0;
if (max == min) {
s = 0.0;
h = 0.0;
} else {
delta = (max - min);
if (l < 128) {
s = 255 * (double) delta / (double) (max + min);
} else {
s = 255 * (double) delta / (double) (511 - max - min);
}
if (r == max) {
h = (g - b) / (double) delta;
} else if (g == max) {
h = 2 + (b - r) / (double) delta;
} else {
h = 4 + (r - g) / (double) delta;
}
h = h * 42.5;
if (h < 0) {
h += 255;
} else if (h > 255) {
h -= 255;
}
}
*hue = ROUND(h);
*sat = ROUND(s);
*light = ROUND(l);
}
void hslToRgb(double h, double s, double l,
unsigned char *red, unsigned char *green, unsigned char *blue) {
if (s == 0) {
/* achromatic case */
*red = l;
*green = l;
*blue = l;
} else {
double m1, m2;
if (l < 128)
m2 = (l * (255 + s)) / 65025.0;
else
m2 = (l + s - (l * s) / 255.0) / 255.0;
m1 = (l / 127.5) - m2;
/* chromatic case */
*red = hslValue(m1, m2, h + 85);
*green = hslValue(m1, m2, h);
*blue = hslValue(m1, m2, h - 85);
}
}
void ImageViewer::colorize() {
int y, x;
unsigned char hr, hg, hb;
int r, g, b;
QRgb *line;
unsigned char h, s, l;
static unsigned char contrastTransform[256];
static unsigned char brightTransform[256];
bool hasAlpha = viewerImage.hasAlphaChannel();
switch(viewerImage.format()) {
case QImage::Format_RGB32:
case QImage::Format_ARGB32:
case QImage::Format_ARGB32_Premultiplied:
break;
default:
viewerImage = viewerImage.convertToFormat(QImage::Format_RGB32);
}
int i;
float contrast = ((float) Settings::contrastVal / 100.0);
float brightness = ((float) Settings::brightVal / 100.0);
for (i = 0; i < 256; ++i) {
if (i < (int) (128.0f + 128.0f * tan(contrast)) && i > (int) (128.0f - 128.0f * tan(contrast))) {
contrastTransform[i] = (i - 128) / tan(contrast) + 128;
} else if (i >= (int) (128.0f + 128.0f * tan(contrast))) {
contrastTransform[i] = 255;
} else {
contrastTransform[i] = 0;
}
}
for (i = 0; i < 256; ++i) {
brightTransform[i] = MIN(255, (int) ((255.0 * pow(i / 255.0, 1.0 / brightness)) + 0.5));
}
for (y = 0; y < viewerImage.height(); ++y) {
line = (QRgb *) viewerImage.scanLine(y);
for (x = 0; x < viewerImage.width(); ++x) {
r = Settings::rNegateEnabled ? bound0To255(255 - qRed(line[x])) : qRed(line[x]);
g = Settings::gNegateEnabled ? bound0To255(255 - qGreen(line[x])) : qGreen(line[x]);
b = Settings::bNegateEnabled ? bound0To255(255 - qBlue(line[x])) : qBlue(line[x]);
r = bound0To255((r * (Settings::redVal + 100)) / 100);
g = bound0To255((g * (Settings::greenVal + 100)) / 100);
b = bound0To255((b * (Settings::blueVal + 100)) / 100);
r = bound0To255(brightTransform[r]);
g = bound0To255(brightTransform[g]);
b = bound0To255(brightTransform[b]);
r = bound0To255(contrastTransform[r]);
g = bound0To255(contrastTransform[g]);
b = bound0To255(contrastTransform[b]);
rgbToHsl(r, g, b, &h, &s, &l);
h = Settings::colorizeEnabled ? Settings::hueVal : h + Settings::hueVal;
s = bound0To255(((s * Settings::saturationVal) / 100));
l = bound0To255(((l * Settings::lightnessVal) / 100));
hslToRgb(h, s, l, &hr, &hg, &hb);
r = Settings::hueRedChannel ? hr : qRed(line[x]);
g = Settings::hueGreenChannel ? hg : qGreen(line[x]);
b = Settings::hueBlueChannel ? hb : qBlue(line[x]);
if (hasAlpha) {
line[x] = qRgba(r, g, b, qAlpha(line[x]));
} else {
line[x] = qRgb(r, g, b);
}
}
}
}
void ImageViewer::refresh() {
if (!imageWidget) {
return;
}
viewerImage = origImage;
if (Settings::colorsActive || Settings::keepTransform) {
colorize();
}
if (myMirrorLayout) {
mirror();
}
imageWidget->setImage(viewerImage, m_exifTransformation);
resizeImage();
}
void ImageViewer::setImage(const QImage &image) {
if (movieWidget) {
delete movieWidget;
movieWidget = nullptr;
imageWidget = new ImageWidget;
imageWidget->setLetterbox(m_letterbox);
imageWidget->setCrossfade(m_crossfade);
setWidget(imageWidget);
}
imageWidget->setImage(image, m_exifTransformation);
}
void ImageViewer::reload() {
static bool s_busy = false;
static bool s_abort = false;
if (s_busy) {
s_abort = true;
QMetaObject::invokeMethod(this, "reload", Qt::QueuedConnection);
return;
}
// setFeedback("",false);
if (Settings::showImageName) {
if (fullImagePath.left(1) == ":") {
setInfo("No Image");
} else if (fullImagePath.isEmpty()) {
setInfo("Clipboard");
} else {
setInfo(QFileInfo(fullImagePath).fileName());
}
}
if (!Settings::keepTransform) {
Settings::rotation = 0;
Settings::flipH = Settings::flipV = false;
}
if (!batchMode) {
Settings::mouseRotateEnabled = false;
emit toolsUpdated();
if (newImage || fullImagePath.isEmpty()) {
newImage = true;
fullImagePath = CLIPBOARD_IMAGE_NAME;
origImage.load(":/images/no_image.png");
viewerImage = origImage;
setImage(viewerImage);
pasteImage();
return;
}
}
QImageReader imageReader(fullImagePath);
if (batchMode && imageReader.supportsAnimation()) {
//: this is a warning on the console
qWarning() << tr("skipping animation in batch mode:") << fullImagePath;
return;
}
if (Settings::enableAnimations && imageReader.supportsAnimation()) {
if (animation) {
delete animation;
animation = nullptr;
}
animation = new QMovie(fullImagePath);
if (animation->frameCount() > 1) {
if (!movieWidget) {
movieWidget = new QLabel();
movieWidget->setScaledContents(true);
setWidget(movieWidget); // deletes imageWidget
imageWidget = nullptr;
}
movieWidget->setMovie(animation);
animation->setParent(movieWidget);
animation->start();
resizeImage();
return;
}
}
// It's not a movie
if (fullImagePath == m_preloadedPath) {
viewerImage = origImage = m_preloadedImage;
m_preloadedImage = QImage();
m_preloadedPath.clear();
} else if (imageReader.size().isValid()) {
QSize sz = imageReader.size();
if (sz.width() * sz.height() > 8192*8192) { // allocation limit
/// @todo this and the correct sqrt(double…) of the below still runs into the size limts?
// perhaps because qimagereader overreads and needs some extra memory
// sz.scale(8192,8192, Qt::KeepAspectRatio);
double factor = double(8192*8192)/(sz.width() * sz.height());
// the sqrt is correct, but too large - the square of the true factor will over"punish" large images
// so we draw an average - this is by "shows the most annoying supersize image I have"
factor = (2*factor + sqrt(factor))/3.0;
sz *= factor;
imageReader.setScaledSize(sz);
setFeedback(tr( "<h1>Warning</h1>Original image size %1x%2 exceeds limits<br>"
"Downscaled to %3x%4<br><h3>Saving edits will save the smaller image!</h3>")
.arg(imageReader.size().width()).arg(imageReader.size().height())
.arg(sz.width()).arg(sz.height()), 10000);
}
bool imageOk = false;
if (batchMode || Settings::slideShowActive) {
imageReader.read(&origImage);
} else {
QThread *thread = QThread::create([&](){imageOk = imageReader.read(&origImage);});
thread->start();
s_busy = true;
while (!thread->wait(30)) {
QApplication::processEvents();
if (s_abort) {
thread->terminate();
thread->wait();
break;
}
}
s_busy = false;
thread->deleteLater();
if (s_abort) {
s_abort = false;
return;
}
}
if (imageOk) {
if (Settings::exifRotationEnabled) {
m_exifTransformation = Metadata::transformation(fullImagePath);
origImage = origImage.transformed(Metadata::transformation(fullImagePath), Qt::SmoothTransformation);
}
viewerImage = origImage;
if (Settings::colorsActive || Settings::keepTransform) {
colorize();
}
if (myMirrorLayout) {
mirror();
}
} else {
viewerImage = QIcon::fromTheme("image-missing",
QIcon(":/images/error_image.png")).pixmap(BAD_IMAGE_SIZE, BAD_IMAGE_SIZE).toImage();
setInfo(QFileInfo(imageReader.fileName()).fileName() + ": " + imageReader.errorString());
}
}
setImage(viewerImage);
resizeImage();
centerImage(imageWidget->imageSize());
if (Settings::keepTransform) {
Qt::Orientations orient;
if (Settings::flipH) orient |= Qt::Horizontal;
if (Settings::flipV) orient |= Qt::Vertical;
imageWidget->setFlip(orient);
imageWidget->setRotation(Settings::rotation);
}
if (Settings::setWindowIcon) {
window()->setWindowIcon(QPixmap::fromImage(viewerImage.scaled(WINDOW_ICON_SIZE, WINDOW_ICON_SIZE,
Qt::KeepAspectRatio, Qt::SmoothTransformation)));
}
}
void ImageViewer::setInfo(QString infoString) {
myFilenameLabel->setText(infoString);
myFilenameLabel->adjustSize();
}
void ImageViewer::unsetFeedback() {
if (m_permanentFeedback.isEmpty()) {
feedbackLabel->clear();
feedbackLabel->setVisible(false);
} else {
setFeedback(m_permanentFeedback, false);
}
}
void ImageViewer::setFeedback(QString feedbackString, int timeLimited) {
if (!timeLimited)
m_permanentFeedback = feedbackString;
if (feedbackString.isEmpty()) {
unsetFeedback();
return;
}
feedbackLabel->setText(feedbackString);
feedbackLabel->setVisible(true/* Settings::layoutMode == Phototonic::ImageViewWidget */);
int margin = myFilenameLabel->isVisible() ? (myFilenameLabel->height() + 15) : 10;
feedbackLabel->move(10, margin);
feedbackLabel->adjustSize();
if (timeLimited)
QTimer::singleShot(timeLimited, this, SLOT(unsetFeedback()));
}
void ImageViewer::loadImage(QString imageFileName, const QImage &preview) {
if (fullImagePath == imageFileName)
return;
unsetFeedback();
newImage = false;
fullImagePath = imageFileName;
if (!Settings::keepZoomFactor) {
tempDisableResize = false;
Settings::imageZoomFactor = 1.0;
}
if (!preview.isNull()) {
QSize fullSize = QImageReader(fullImagePath).size();
// don't preview small images w/ a huge thumbnail upscale
// it's pointless and causes ugly flicker
if (!fullSize.isValid() || (fullSize.width() > 4*width()/5 && fullSize.height() > 4*height()/5)) {
setImage(preview);
const int zif = Settings::zoomInFlags;
const bool disRes = tempDisableResize;
tempDisableResize = false;
Settings::zoomInFlags = WidthAndHeight;
resizeImage();
Settings::zoomInFlags = zif;
tempDisableResize = disRes;
}
}
QApplication::processEvents();
reload();
}
void ImageViewer::preload(QString imageFileName) {
if (m_preloadedPath == imageFileName)
return;
m_preloadedPath = imageFileName;
// reload current one - maybe the file has changed on disk?
/*if (m_preloadedPath == fullImagePath) {
m_preloadedImage = origImage;
return;
}*/
QImageReader imageReader(m_preloadedPath);
if (imageReader.supportsAnimation()) {
m_preloadedImage = QImage();
m_preloadedPath.clear();
return; // no preloading animations
}
if (imageReader.size().isValid() && imageReader.read(&m_preloadedImage)) {
if (Settings::exifRotationEnabled) {
m_preloadedImage = m_preloadedImage.transformed(Metadata::transformation(fullImagePath), Qt::SmoothTransformation);
}
} else {
m_preloadedImage = QImage();
m_preloadedPath.clear();
}
}
void ImageViewer::clearImage() {
fullImagePath.clear();
origImage.load(":/images/no_image.png");
viewerImage = origImage;
setImage(viewerImage);
}
void ImageViewer::setContextMenu(QMenu *menu) {
delete myContextMenu;
myContextMenu = menu;
myContextMenu->setParent(this);
}
void ImageViewer::setCrossfade(bool yesno) {
m_crossfade = yesno;
if (imageWidget)
imageWidget->setCrossfade(m_crossfade);
}
void ImageViewer::monitorCursorState() {
static QPoint lastPos;
if (QCursor::pos() != lastPos) {
lastPos = QCursor::pos();
if (cursorIsHidden) {
QApplication::restoreOverrideCursor();
cursorIsHidden = false;
}
} else {
if (!cursorIsHidden) {
QApplication::setOverrideCursor(Qt::BlankCursor);
cursorIsHidden = true;
}
}
}
void ImageViewer::setCursorHiding(bool hide) {
if (hide) {
mouseMovementTimer->start(500);
} else {
mouseMovementTimer->stop();
if (cursorIsHidden) {
QApplication::restoreOverrideCursor();
cursorIsHidden = false;
}
}
}
void ImageViewer::mouseDoubleClickEvent(QMouseEvent *event) {
QWidget::mouseDoubleClickEvent(event);
while (QApplication::overrideCursor()) {
QApplication::restoreOverrideCursor();
}
}
void ImageViewer::mousePressEvent(QMouseEvent *event) {
if (!imageWidget) {
return;
}
if (event->button() == Qt::LeftButton) {
if (event->modifiers() == Qt::ControlModifier) {
cropOrigin = event->pos();
if (!cropRubberBand) {
cropRubberBand = new CropRubberBand(this);
connect(cropRubberBand, &CropRubberBand::selectionChanged,
this, &ImageViewer::updateRubberBandFeedback);
connect(cropRubberBand, &CropRubberBand::cropConfirmed,
this, &ImageViewer::applyCropAndRotation);
}
cropRubberBand->show();
cropRubberBand->setGeometry(QRect(cropOrigin, event->pos()).normalized());
} else if (event->modifiers() != Qt::ShiftModifier) {
if (cropRubberBand && cropRubberBand->isVisible()) {
cropRubberBand->hide();
setFeedback("", false);
}
}
QPointF fulcrum(QPointF(imageWidget->width() / 2.0, imageWidget->height() / 2.0));
QLineF vector(fulcrum, event->position());
initialRotation = imageWidget->rotation() + vector.angle();
setMouseMoveData(true, event->position().x(), event->position().y());
QApplication::setOverrideCursor(Qt::ClosedHandCursor);
event->accept();
}
QWidget::mousePressEvent(event);
}
void ImageViewer::mouseReleaseEvent(QMouseEvent *event) {
if (event->button() == Qt::LeftButton) {
setMouseMoveData(false, 0, 0);
while (QApplication::overrideCursor()) {
QApplication::restoreOverrideCursor();
}
}
QWidget::mouseReleaseEvent(event);
}
void ImageViewer::updateRubberBandFeedback(QRect geom) {
if (!imageWidget) {
return;
}
bool ok;
QTransform matrix = imageWidget->transformation().inverted(&ok);
if (!ok)
qDebug() << "something's fucked up about the transformation matrix!";
m_isoCropRect = geom = matrix.mapRect(geom);
setFeedback(tr("Selection: ") + QString("%1x%2").arg(geom.width()).arg(geom.height())
+ QString(geom.x() < 0 ? "%1" : "+%1").arg(geom.x())
+ QString(geom.y() < 0 ? "%1" : "+%1").arg(geom.y()), false);
static QTimer *doubleclickhint = nullptr;
if (!doubleclickhint) {
doubleclickhint = new QTimer(this);
doubleclickhint->setInterval(5000);
doubleclickhint->setSingleShot(true);
connect(doubleclickhint, &QTimer::timeout, [=]() {
if (cropRubberBand && cropRubberBand->isVisible())
setFeedback(tr("Doubleclick to crop"));
});
}
doubleclickhint->start();
}
void ImageViewer::applyCropAndRotation() {
if (!imageWidget || ! cropRubberBand)
return;
cropRubberBand->hide();
QTransform matrix = imageWidget->transformation();
bool ok;
// the inverted mapping of the crop area matches the coordinates of the original image
m_isoCropRect = matrix.inverted(&ok).mapRect(cropRubberBand->geometry());
if (!ok) {
qDebug() << "something's fucked up about the transformation matrix! Not cropping";
return;
}
if (!matrix.isRotating()) {
// … we can just copy the area, later apply flips and be done
origImage = origImage.copy(m_isoCropRect);
} else {
// The rotated case is more involved. The inverted matrix still maps image coordinates
// but that's not what the user sees or expects.
//
// This is inherently lossy because of the pixel transpositon, so special-case it
const QSize visualSize = imageWidget->imageSize();
float scale = qMax(float(visualSize.width()) / viewerImage.width(), float(visualSize.height()) / viewerImage.height());
if (scale <= 0.0) {
qDebug() << "something is seriously wrong with the scale, not cropping" << scale;
return;
}
// The new image size must be the size of the visible crop area, compensated for the current scale factor
QImage target(cropRubberBand->geometry().size()/scale, origImage.format());