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/* This file is part of the KDE project
Copyright (C) 2011 Thorsten Zachmann <zachmann@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "CompareView.h"
#include <QDebug>
#include <QGridLayout>
#include <QKeyEvent>
#include <QLabel>
#include <QTabBar>
#include <QStackedWidget>
CompareView::CompareView(QWidget *parent)
: QWidget(parent)
{
init();
}
CompareView::CompareView(const QImage &image1, const QImage &image2, const QString &name1, const QString &name2, QWidget *parent)
: QWidget(parent)
, m_image1(image1)
, m_image2(image2)
{
init();
update(image1, image2, name1, name2, QImage());
}
CompareView::~CompareView()
{
}
void CompareView::init()
{
QGridLayout *layout = new QGridLayout(this);
layout->setContentsMargins(0, 0, 0, 0);
m_tabBar = new QTabBar();
m_tabBar->addTab("Image 1");
m_tabBar->addTab("Image 2");
layout->addWidget(m_tabBar, 0, 0, 1, 2);
connect(m_tabBar, SIGNAL(currentChanged(int)), this, SLOT(currentChanged(int)));
m_image1Label = new QLabel();
m_image2Label = new QLabel();
m_stack = new QStackedWidget();
m_stack->addWidget(m_image1Label);
m_stack->addWidget(m_image2Label);
layout->addWidget(m_stack, 1, 0);
m_diffLabel = new QLabel(this);
layout->addWidget(m_diffLabel, 1, 1, Qt::AlignCenter);
setLayout(layout);
}
void CompareView::update(const QImage &image1, const QImage &image2, const QString &name1, const QString &name2, const QImage &forcedDeltaView)
{
m_image1 = image1;
m_image2 = image2;
if (forcedDeltaView.isNull()) {
m_diff = difference(image1, image2);
} else {
m_diff = forcedDeltaView;
}
m_tabBar->setTabText(0, name1);
m_tabBar->setTabText(1, name2);
m_image1Label->setPixmap(QPixmap::fromImage(image1));
m_image2Label->setPixmap(QPixmap::fromImage(image2));
m_diffLabel->setPixmap(QPixmap::fromImage(m_diff));
m_diffLabel->setMinimumWidth(image1.width());
m_diffLabel->setAlignment(Qt::AlignCenter);
}
int lighten(int value)
{
return 255 - (255 - value) / 2;
}
QImage CompareView::difference(const QImage &image1, const QImage &image2)
{
QSize size(image1.size());
if (size != image2.size()) {
return QImage();
}
quint32 width = size.width();
quint32 height = size.height();
QImage result(width, height, QImage::Format_ARGB32);
for (quint32 y = 0; y < height; ++y) {
QRgb *scanLineRes = (QRgb *)result.scanLine(y);
QRgb *scanLineIn1 = (QRgb *)image1.scanLine(y);
QRgb *scanLineIn2 = (QRgb *)image2.scanLine(y);
for (quint32 x = 0; x < width; ++x) {
if (scanLineIn1[x] == scanLineIn2[x]) {
scanLineRes[x] = qRgb(lighten(qRed(scanLineIn1[x])), lighten(qGreen(scanLineIn1[x])), lighten(qBlue(scanLineIn1[x])));
}
else {
scanLineRes[x] = qRgb(255, 0, 0);
}
}
}
return result;
}
void CompareView::keyPressEvent(QKeyEvent * event)
{
switch (event->key()) {
case Qt::Key_Space:
m_tabBar->setCurrentIndex((m_tabBar->currentIndex() + 1) % 2);
m_stack->setCurrentIndex(m_tabBar->currentIndex());
break;
default:
event->setAccepted(false);
break;
}
}
void CompareView::currentChanged(int currentIndex)
{
m_tabBar->setCurrentIndex(currentIndex);
m_stack->setCurrentIndex(currentIndex);
}
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