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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 "ImageViewer.h"
#include "Phototonic.h"
#include "MessageBox.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 MyScrollArea : public QScrollArea {
protected:
void wheelEvent(QWheelEvent *event) override {
event->ignore();
return;
}
};
} // anonymous namespace
ImageViewer::ImageViewer(QWidget *parent, const std::shared_ptr<MetadataCache> &metadataCache) : QWidget(parent) {
// This is a threadsafe way to ensure that we only register it once
static Exiv2LogHandler handler;
this->phototonic = (Phototonic *) parent;
this->metadataCache = metadataCache;
cursorIsHidden = false;
moveImageLocked = false;
mirrorLayout = LayNone;
imageWidget = new ImageWidget;
animation = nullptr;
scrollArea = new MyScrollArea;
scrollArea->setContentsMargins(0, 0, 0, 0);
scrollArea->setAlignment(Qt::AlignCenter);
scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
scrollArea->setFrameStyle(0);
scrollArea->setWidget(imageWidget);
scrollArea->setWidgetResizable(false);
setBackgroundColor();
QVBoxLayout *scrollLayout = new QVBoxLayout;
scrollLayout->setContentsMargins(0, 0, 0, 0);
scrollLayout->setSpacing(0);
scrollLayout->addWidget(scrollArea);
this->setLayout(scrollLayout);
imageInfoLabel = new QLabel(this);
imageInfoLabel->setVisible(Settings::showImageName);
imageInfoLabel->setMargin(3);
imageInfoLabel->move(10, 10);
imageInfoLabel->setStyleSheet("QLabel { background-color : black; color : white; border-radius: 3px} ");
feedbackLabel = new QLabel(this);
feedbackLabel->setVisible(false);
feedbackLabel->setMargin(3);
feedbackLabel->setStyleSheet("QLabel { background-color : black; color : white; border-radius: 3px} ");
QGraphicsOpacityEffect *infoEffect = new QGraphicsOpacityEffect;
infoEffect->setOpacity(0.5);
imageInfoLabel->setGraphicsEffect(infoEffect);
QGraphicsOpacityEffect *feedbackEffect = new QGraphicsOpacityEffect;
feedbackEffect->setOpacity(0.5);
feedbackLabel->setGraphicsEffect(feedbackEffect);
mouseMovementTimer = new QTimer(this);
connect(mouseMovementTimer, SIGNAL(timeout()), this, SLOT(monitorCursorState()));
Settings::cropLeft = Settings::cropTop = Settings::cropWidth = Settings::cropHeight = 0;
Settings::cropLeftPercent = Settings::cropTopPercent = Settings::cropWidthPercent = Settings::cropHeightPercent = 0;
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) {
float aspect;
aspect = (float) imgWidth / (float) newWidth;
return (imgHeight / aspect);
}
static unsigned int getWidthByHeight(int imgHeight, int imgWidth, int newHeight) {
float aspect;
aspect = (float) imgHeight / (float) newHeight;
return (imgWidth / aspect);
}
static inline int calcZoom(int size) {
return size * Settings::imageZoomFactor;
}
void ImageViewer::resizeImage() {
static bool busy = false;
if (busy) {
return;
}
QSize imageSize;
if (animation) {
imageSize = animation->currentPixmap().size();
} else if (imageWidget) {
imageSize = imageWidget->imageSize();
} else {
return;
}
if (imageSize.isEmpty()) {
return;
}
busy = true;
int imageViewWidth = this->size().width();
int imageViewHeight = this->size().height();
float positionY = scrollArea->verticalScrollBar()->value() > 0 ? scrollArea->verticalScrollBar()->value() / float(scrollArea->verticalScrollBar()->maximum()) : 0;
float positionX = scrollArea->horizontalScrollBar()->value() > 0 ? scrollArea->horizontalScrollBar()->value() / float(scrollArea->horizontalScrollBar()->maximum()) : 0;
if (tempDisableResize) {
imageSize.scale(imageSize.width(), imageSize.height(), Qt::KeepAspectRatio);
} else {
switch (Settings::zoomInFlags) {
case Disable:
if (imageSize.width() <= imageViewWidth && imageSize.height() <= imageViewHeight) {
imageSize.scale(calcZoom(imageSize.width()),
calcZoom(imageSize.height()),
Qt::KeepAspectRatio);
}
break;
case WidthAndHeight:
if (imageSize.width() <= imageViewWidth && imageSize.height() <= imageViewHeight) {
imageSize.scale(calcZoom(imageViewWidth),
calcZoom(imageViewHeight),
Qt::KeepAspectRatio);
}
break;
case Width:
if (imageSize.width() <= imageViewWidth) {
imageSize.scale(calcZoom(imageViewWidth),
calcZoom(getHeightByWidth(imageSize.width(),
imageSize.height(),
imageViewWidth)),
Qt::KeepAspectRatio);
}
break;
case Height:
if (imageSize.height() <= imageViewHeight) {
imageSize.scale(calcZoom(getWidthByHeight(imageSize.height(),
imageSize.width(),
imageViewHeight)),
calcZoom(imageViewHeight),
Qt::KeepAspectRatio);
}
break;
case Disprop:
int newWidth = imageSize.width(), newHeight = imageSize.height();
if (newWidth <= imageViewWidth) {
newWidth = imageViewWidth;
}
if (newHeight <= imageViewHeight) {
newHeight = imageViewHeight;
}
imageSize.scale(calcZoom(newWidth), calcZoom(newHeight), Qt::IgnoreAspectRatio);
break;
}
switch (Settings::zoomOutFlags) {
case Disable:
if (imageSize.width() >= imageViewWidth || imageSize.height() >= imageViewHeight) {
imageSize.scale(calcZoom(imageSize.width()),
calcZoom(imageSize.height()),
Qt::KeepAspectRatio);
}
break;
case WidthAndHeight:
if (imageSize.width() >= imageViewWidth || imageSize.height() >= imageViewHeight) {
imageSize.scale(calcZoom(imageViewWidth),
calcZoom(imageViewHeight),
Qt::KeepAspectRatio);
}
break;
case Width:
if (imageSize.width() >= imageViewWidth) {
imageSize.scale(calcZoom(imageViewWidth),
calcZoom(getHeightByWidth(imageSize.width(),
imageSize.height(),
imageViewWidth)),
Qt::KeepAspectRatio);
}
break;
case Height:
if (imageSize.height() >= imageViewHeight) {
imageSize.scale(calcZoom(getWidthByHeight(imageSize.height(),
imageSize.width(),
imageViewHeight)),
calcZoom(imageViewHeight),
Qt::KeepAspectRatio);
}
break;
case Disprop:
int newWidth = imageSize.width(), newHeight = imageSize.height();
if (newWidth >= imageViewWidth) {
newWidth = imageViewWidth;
}
if (newHeight >= imageViewHeight) {
newHeight = imageViewHeight;
}
imageSize.scale(calcZoom(newWidth), calcZoom(newHeight), Qt::IgnoreAspectRatio);
break;
}
}
QPointF newPosition = scrollArea->widget()->pos();
scrollArea->widget()->setFixedSize(imageSize);
scrollArea->widget()->adjustSize();
if (newPosition.isNull() || imageSize.width() < width() + 100 || imageSize.height() < height() + 100) {
centerImage(imageSize);
} else {
scrollArea->horizontalScrollBar()->setValue(scrollArea->horizontalScrollBar()->maximum() * positionX);
scrollArea->verticalScrollBar()->setValue(scrollArea->verticalScrollBar()->maximum() * positionY);
}
busy = false;
}
void ImageViewer::resizeEvent(QResizeEvent *event) {
QWidget::resizeEvent(event);
resizeImage();
}
void ImageViewer::showEvent(QShowEvent *event) {
QWidget::showEvent(event);
resizeImage();
}
void ImageViewer::centerImage(QSize &imgSize) {
scrollArea->ensureVisible(imgSize.width()/2, imgSize.height()/2, width()/2, height()/2);
}
void ImageViewer::rotateByExifRotation(QImage &image, QString &imageFullPath) {
QTransform trans;
long orientation = metadataCache->getImageOrientation(imageFullPath);
switch (orientation) {
case 1:
break;
case 2:
image = image.mirrored(true, false);
break;
case 3:
trans.rotate(180);
image = image.transformed(trans, Qt::SmoothTransformation);
break;
case 4:
image = image.mirrored(false, true);
break;
case 5:
trans.rotate(90);
image = image.transformed(trans, Qt::SmoothTransformation);
image = image.mirrored(true, false);
break;
case 6:
trans.rotate(90);
image = image.transformed(trans, Qt::SmoothTransformation);
break;
case 7:
trans.rotate(90);
image = image.transformed(trans, Qt::SmoothTransformation);
image = image.mirrored(false, true);
break;
case 8:
trans.rotate(270);
image = image.transformed(trans, Qt::SmoothTransformation);
break;
default:
break;
}
}
void ImageViewer::transform() {
if (!qFuzzyCompare(Settings::rotation, 0)) {
QTransform trans;
trans.rotate(Settings::rotation);
viewerImage = viewerImage.transformed(trans, Qt::SmoothTransformation);
}
if (Settings::flipH || Settings::flipV) {
viewerImage = viewerImage.mirrored(Settings::flipH, Settings::flipV);
}
int cropLeftPercentPixels = 0, cropTopPercentPixels = 0, cropWidthPercentPixels = 0, cropHeightPercentPixels = 0;
bool croppingOn = false;
if (Settings::cropLeftPercent || Settings::cropTopPercent
|| Settings::cropWidthPercent || Settings::cropHeightPercent) {
croppingOn = true;
cropLeftPercentPixels = (viewerImage.width() * Settings::cropLeftPercent) / 100;
cropTopPercentPixels = (viewerImage.height() * Settings::cropTopPercent) / 100;
cropWidthPercentPixels = (viewerImage.width() * Settings::cropWidthPercent) / 100;
cropHeightPercentPixels = (viewerImage.height() * Settings::cropHeightPercent) / 100;
}
if (Settings::cropLeft || Settings::cropTop || Settings::cropWidth || Settings::cropHeight) {
viewerImage = viewerImage.copy(
Settings::cropLeft + cropLeftPercentPixels,
Settings::cropTop + cropTopPercentPixels,
viewerImage.width() - Settings::cropLeft - Settings::cropWidth - cropLeftPercentPixels -
cropWidthPercentPixels,
viewerImage.height() - Settings::cropTop - Settings::cropHeight - cropTopPercentPixels -
cropHeightPercentPixels);
} else {
if (croppingOn) {
viewerImage = viewerImage.copy(
cropLeftPercentPixels,
cropTopPercentPixels,
viewerImage.width() - cropLeftPercentPixels - cropWidthPercentPixels,
viewerImage.height() - cropTopPercentPixels - cropHeightPercentPixels);
}
}
}
void ImageViewer::mirror() {
switch (mirrorLayout) {
case LayDual: {
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 LayTriple: {
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 LayQuad: {
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 LayVDual: {
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;
}
}
viewerImage = mirrorImage;
}
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;
}
if (Settings::scaledWidth) {
viewerImage = origImage.scaled(Settings::scaledWidth, Settings::scaledHeight,
Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
} else {
viewerImage = origImage;
}
transform();
if (Settings::colorsActive || Settings::keepTransform) {
colorize();
}
if (mirrorLayout) {
mirror();
}
imageWidget->setImage(viewerImage);
resizeImage();
}
void ImageViewer::setImage(const QImage &image) {
if (movieWidget) {
delete movieWidget;
movieWidget = nullptr;
imageWidget = new ImageWidget;
scrollArea->setWidget(imageWidget);
}
imageWidget->setImage(image);
}
QImage createImageWithOverlay(const QImage &baseImage, const QImage &overlayImage, int x, int y) {
QImage imageWithOverlay = QImage(overlayImage.size(), QImage::Format_ARGB32_Premultiplied);
QPainter painter(&imageWithOverlay);
QImage scaledImage = baseImage.scaled(overlayImage.width(), overlayImage.height(),
Qt::KeepAspectRatio, Qt::SmoothTransformation);
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.fillRect(imageWithOverlay.rect(), Qt::transparent);
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
painter.drawImage(x, y, scaledImage);
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
painter.drawImage(0, 0, overlayImage);
painter.end();
return imageWithOverlay;
}
void ImageViewer::reload() {
if (Settings::showImageName) {
if (viewerImageFullPath.left(1) == ":") {
setInfo("No Image");
} else if (viewerImageFullPath.isEmpty()) {
setInfo("Clipboard");
} else {
setInfo(QFileInfo(viewerImageFullPath).fileName());
}
}
if (!Settings::keepTransform) {
Settings::cropLeftPercent = Settings::cropTopPercent = Settings::cropWidthPercent = Settings::cropHeightPercent = 0;
Settings::rotation = 0;
Settings::flipH = Settings::flipV = false;
}
Settings::scaledWidth = Settings::scaledHeight = 0;
if (!batchMode) {
Settings::mouseRotateEnabled = false;
emit toolsUpdated();
if (!Settings::keepTransform)
Settings::cropLeft = Settings::cropTop = Settings::cropWidth = Settings::cropHeight = 0;
if (newImage || viewerImageFullPath.isEmpty()) {
newImage = true;
viewerImageFullPath = CLIPBOARD_IMAGE_NAME;
origImage.load(":/images/no_image.png");
viewerImage = origImage;
setImage(viewerImage);
pasteImage();
return;
}
}
QImageReader imageReader(viewerImageFullPath);
if (batchMode && imageReader.supportsAnimation()) {
qWarning() << tr("skipping animation in batch mode:") << viewerImageFullPath;
return;
}
if (Settings::enableAnimations && imageReader.supportsAnimation()) {
if (animation) {
delete animation;
animation = nullptr;
}
animation = new QMovie(viewerImageFullPath);
if (animation->frameCount() > 1) {
if (!movieWidget) {
movieWidget = new QLabel();
movieWidget->setScaledContents(true);
scrollArea->setWidget(movieWidget); // deletes imageWidget
imageWidget = nullptr;
}
movieWidget->setMovie(animation);
animation->setParent(movieWidget);
animation->start();
resizeImage();
return;
}
}
// It's not a movie
if (imageReader.size().isValid() && imageReader.read(&origImage)) {
if (Settings::exifRotationEnabled) {
rotateByExifRotation(origImage, viewerImageFullPath);
}
viewerImage = origImage;
if (Settings::colorsActive || Settings::keepTransform) {
colorize();
}
if (mirrorLayout) {
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();
if (Settings::keepTransform) {
if (Settings::cropLeft || Settings::cropTop || Settings::cropWidth || Settings::cropHeight)
cropRubberBand->show();
imageWidget->setRotation(Settings::rotation);
}
if (Settings::setWindowIcon) {
QPixmap icon;
icon.convertFromImage(viewerImage.scaled(WINDOW_ICON_SIZE, WINDOW_ICON_SIZE,
Qt::KeepAspectRatio, Qt::SmoothTransformation));
phototonic->setWindowIcon(icon);
}
}
void ImageViewer::setInfo(QString infoString) {
imageInfoLabel->setText(infoString);
imageInfoLabel->adjustSize();
}
void ImageViewer::unsetFeedback() {
feedbackLabel->clear();
feedbackLabel->setVisible(false);
}
void ImageViewer::setFeedback(QString feedbackString, bool timeLimited) {
if (feedbackString.isEmpty())
return;
feedbackLabel->setText(feedbackString);
feedbackLabel->setVisible(true);
int margin = imageInfoLabel->isVisible() ? (imageInfoLabel->height() + 15) : 10;
feedbackLabel->move(10, margin);
feedbackLabel->adjustSize();
if (timeLimited)
QTimer::singleShot(3000, this, SLOT(unsetFeedback()));
}
void ImageViewer::loadImage(QString imageFileName) {
newImage = false;
tempDisableResize = false;
viewerImageFullPath = imageFileName;
if (!Settings::keepZoomFactor) {
Settings::imageZoomFactor = 1.0;
}
QApplication::processEvents();
reload();
}
void ImageViewer::clearImage() {
origImage.load(":/images/no_image.png");
viewerImage = origImage;
setImage(viewerImage);
}
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);
}
cropRubberBand->show();
cropRubberBand->setGeometry(QRect(cropOrigin, event->pos()).normalized());
} else {
if (cropRubberBand) {
cropRubberBand->hide();
}
}
initialRotation = imageWidget->rotation();
setMouseMoveData(true, event->x(), event->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;
}
QPoint bandTopLeft = imageWidget->mapToImage(imageWidget->mapFromGlobal(mapToGlobal(cropRubberBand->geometry().topLeft())));
setFeedback(tr("Selection: ")
+ QString::number(geom.width())
+ "x"
+ QString::number(geom.height())
+ (bandTopLeft.x() < 0 ? "" : "+")
+ QString::number(bandTopLeft.x())
+ (bandTopLeft.y() < 0 ? "" : "+")
+ QString::number(bandTopLeft.y()), false);
}
void ImageViewer::applyCropAndRotation() {
if (!imageWidget) {
return;
}
bool didSomething = false;
if (cropRubberBand && cropRubberBand->isVisible()) {
QPoint bandTopLeft = mapToGlobal(cropRubberBand->geometry().topLeft());
QPoint bandBottomRight = mapToGlobal(cropRubberBand->geometry().bottomRight());
bandTopLeft = imageWidget->mapToImage(imageWidget->mapFromGlobal(bandTopLeft));
bandBottomRight = imageWidget->mapToImage(imageWidget->mapFromGlobal(bandBottomRight));
double scaledX = imageWidget->imageSize().width();
double scaledY = imageWidget->imageSize().height();
scaledX = viewerImage.width() / scaledX;
scaledY = viewerImage.height() / scaledY;
bandTopLeft.setX(int(bandTopLeft.x() * scaledX));
bandTopLeft.setY(int(bandTopLeft.y() * scaledY));
bandBottomRight.setX(int(bandBottomRight.x() * scaledX));
bandBottomRight.setY(int(bandBottomRight.y() * scaledY));
Settings::cropLeft = bandTopLeft.x();
Settings::cropTop = bandTopLeft.y();
Settings::cropWidth = viewerImage.width() - bandBottomRight.x();
Settings::cropHeight = viewerImage.height() - bandBottomRight.y();
Settings::rotation = imageWidget->rotation();
cropRubberBand->hide();
refresh();
didSomething = true;
}
if (!qFuzzyCompare(imageWidget->rotation(), 0)) {
refresh();
imageWidget->setRotation(0);
didSomething = true;
}
if (!didSomething) {
MessageBox messageBox(this);
messageBox.warning(tr("No selection for cropping, and no rotation"),
tr("To make a selection, hold down the Ctrl key and select a region using the mouse. "
"To rotate, hold down the Ctrl and Shift keys and drag the mouse near the right edge."));
}
}
void ImageViewer::setMouseMoveData(bool lockMove, int lMouseX, int lMouseY) {
if (!imageWidget) {
return;
}
moveImageLocked = lockMove;
mouseX = lMouseX;
mouseY = lMouseY;
layoutX = imageWidget->pos().x();
layoutY = imageWidget->pos().y();
}
void ImageViewer::mouseMoveEvent(QMouseEvent *event) {
if (!imageWidget) {
return;
}
if (Settings::mouseRotateEnabled) {
QPointF fulcrum(QPointF(imageWidget->pos()) + QPointF(imageWidget->width() / 2.0, imageWidget->height() / 2.0));
if (event->pos().x() > (width() * 3) / 4)
fulcrum.setY(mouseY); // if the user pressed near the right edge, start with initial rotation of 0
QLineF vector(fulcrum, event->localPos());
imageWidget->setRotation(initialRotation - vector.angle());
// qDebug() << "image center" << fulcrum << "line" << vector << "angle" << vector.angle() << "geom" << imageWidget->geometry();
} else if (event->modifiers() & Qt::ControlModifier) {
if (!cropRubberBand || !cropRubberBand->isVisible()) {
return;
}
QRect newRect;
newRect = QRect(cropOrigin, event->pos());
// Force square
if (event->modifiers() & Qt::ShiftModifier) {
const int deltaX = cropOrigin.x() - event->pos().x();
const int deltaY = cropOrigin.y() - event->pos().y();
newRect.setSize(QSize(-deltaX, deltaY < 0 ? qAbs(deltaX) : -qAbs(deltaX)));
}
cropRubberBand->setGeometry(newRect.normalized());
} else {
if (moveImageLocked) {
int newX = layoutX + (event->pos().x() - mouseX);
int newY = layoutY + (event->pos().y() - mouseY);
bool needToMove = false;
if (imageWidget->size().width() > size().width()) {
if (newX > 0) {
newX = 0;
} else if (newX < (size().width() - imageWidget->size().width())) {
newX = (size().width() - imageWidget->size().width());
}
needToMove = true;
} else {
newX = layoutX;
}