155 lines
4.1 KiB
C++

// 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 "documentviewsynchronizer.h"
// Local
#include <documentview/documentview.h>
// KF
// Qt
#include <QPointer>
namespace Gwenview
{
struct DocumentViewSynchronizerPrivate {
DocumentViewSynchronizer *q = nullptr;
const QList<DocumentView *> *mViews = nullptr;
QPointer<DocumentView> mCurrentView;
bool mActive;
QPoint mOldPosition;
DocumentViewSynchronizerPrivate(const QList<DocumentView *> *views)
: mViews(views)
{
}
void updateConnections()
{
if (!mCurrentView || !mActive) {
return;
}
QObject::connect(mCurrentView.data(), SIGNAL(zoomChanged(qreal)), q, SLOT(setZoom(qreal)));
QObject::connect(mCurrentView.data(), SIGNAL(zoomToFitChanged(bool)), q, SLOT(setZoomToFit(bool)));
QObject::connect(mCurrentView.data(), SIGNAL(zoomToFillChanged(bool)), q, SLOT(setZoomToFill(bool)));
QObject::connect(mCurrentView.data(), SIGNAL(positionChanged()), q, SLOT(updatePosition()));
for (DocumentView *view : qAsConst(*mViews)) {
if (view == mCurrentView.data()) {
continue;
}
view->setZoom(mCurrentView.data()->zoom());
view->setZoomToFit(mCurrentView.data()->zoomToFit());
view->setZoomToFill(mCurrentView.data()->zoomToFill());
}
}
void updateOldPosition()
{
if (!mCurrentView || !mActive) {
return;
}
mOldPosition = mCurrentView.data()->position();
}
};
DocumentViewSynchronizer::DocumentViewSynchronizer(const QList<DocumentView *> *views, QObject *parent)
: QObject(parent)
, d(new DocumentViewSynchronizerPrivate(views))
{
d->q = this;
d->mActive = false;
}
DocumentViewSynchronizer::~DocumentViewSynchronizer()
{
delete d;
}
void DocumentViewSynchronizer::setCurrentView(DocumentView *view)
{
if (d->mCurrentView) {
disconnect(d->mCurrentView.data(), nullptr, this, nullptr);
}
d->mCurrentView = view;
d->updateOldPosition();
d->updateConnections();
}
void DocumentViewSynchronizer::setActive(bool active)
{
d->mActive = active;
d->updateOldPosition();
d->updateConnections();
}
void DocumentViewSynchronizer::setZoom(qreal zoom)
{
for (DocumentView *view : qAsConst(*d->mViews)) {
if (view == d->mCurrentView.data()) {
continue;
}
view->setZoom(zoom);
}
d->updateOldPosition();
}
void DocumentViewSynchronizer::setZoomToFit(bool fit)
{
for (DocumentView *view : qAsConst(*d->mViews)) {
if (view == d->mCurrentView.data()) {
continue;
}
view->setZoomToFit(fit);
}
d->updateOldPosition();
}
void DocumentViewSynchronizer::setZoomToFill(bool fit)
{
for (DocumentView *view : qAsConst(*d->mViews)) {
if (view == d->mCurrentView.data()) {
continue;
}
view->setZoomToFill(fit);
}
d->updateOldPosition();
}
void DocumentViewSynchronizer::updatePosition()
{
QPoint pos = d->mCurrentView.data()->position();
QPoint delta = pos - d->mOldPosition;
d->mOldPosition = pos;
for (DocumentView *view : qAsConst(*d->mViews)) {
if (view == d->mCurrentView.data()) {
continue;
}
view->setPosition(view->position() + delta);
}
}
} // namespace
#include "moc_documentviewsynchronizer.cpp"