155 lines
4.1 KiB
C++
155 lines
4.1 KiB
C++
// vim: set tabstop=4 shiftwidth=4 expandtab:
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/*
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Gwenview: an image viewer
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Copyright 2011 Aurélien Gâteau <agateau@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.
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*/
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// Self
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#include "documentviewsynchronizer.h"
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// Local
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#include <documentview/documentview.h>
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// KF
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// Qt
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#include <QPointer>
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namespace Gwenview
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{
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struct DocumentViewSynchronizerPrivate {
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DocumentViewSynchronizer *q = nullptr;
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const QList<DocumentView *> *mViews = nullptr;
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QPointer<DocumentView> mCurrentView;
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bool mActive;
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QPoint mOldPosition;
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DocumentViewSynchronizerPrivate(const QList<DocumentView *> *views)
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: mViews(views)
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{
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}
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void updateConnections()
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{
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if (!mCurrentView || !mActive) {
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return;
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}
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QObject::connect(mCurrentView.data(), SIGNAL(zoomChanged(qreal)), q, SLOT(setZoom(qreal)));
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QObject::connect(mCurrentView.data(), SIGNAL(zoomToFitChanged(bool)), q, SLOT(setZoomToFit(bool)));
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QObject::connect(mCurrentView.data(), SIGNAL(zoomToFillChanged(bool)), q, SLOT(setZoomToFill(bool)));
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QObject::connect(mCurrentView.data(), SIGNAL(positionChanged()), q, SLOT(updatePosition()));
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for (DocumentView *view : qAsConst(*mViews)) {
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if (view == mCurrentView.data()) {
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continue;
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}
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view->setZoom(mCurrentView.data()->zoom());
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view->setZoomToFit(mCurrentView.data()->zoomToFit());
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view->setZoomToFill(mCurrentView.data()->zoomToFill());
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}
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}
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void updateOldPosition()
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{
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if (!mCurrentView || !mActive) {
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return;
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}
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mOldPosition = mCurrentView.data()->position();
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}
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};
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DocumentViewSynchronizer::DocumentViewSynchronizer(const QList<DocumentView *> *views, QObject *parent)
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: QObject(parent)
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, d(new DocumentViewSynchronizerPrivate(views))
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{
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d->q = this;
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d->mActive = false;
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}
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DocumentViewSynchronizer::~DocumentViewSynchronizer()
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{
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delete d;
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}
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void DocumentViewSynchronizer::setCurrentView(DocumentView *view)
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{
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if (d->mCurrentView) {
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disconnect(d->mCurrentView.data(), nullptr, this, nullptr);
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}
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d->mCurrentView = view;
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d->updateOldPosition();
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d->updateConnections();
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}
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void DocumentViewSynchronizer::setActive(bool active)
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{
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d->mActive = active;
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d->updateOldPosition();
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d->updateConnections();
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}
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void DocumentViewSynchronizer::setZoom(qreal zoom)
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{
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for (DocumentView *view : qAsConst(*d->mViews)) {
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if (view == d->mCurrentView.data()) {
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continue;
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}
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view->setZoom(zoom);
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}
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d->updateOldPosition();
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}
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void DocumentViewSynchronizer::setZoomToFit(bool fit)
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{
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for (DocumentView *view : qAsConst(*d->mViews)) {
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if (view == d->mCurrentView.data()) {
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continue;
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}
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view->setZoomToFit(fit);
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}
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d->updateOldPosition();
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}
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void DocumentViewSynchronizer::setZoomToFill(bool fit)
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{
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for (DocumentView *view : qAsConst(*d->mViews)) {
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if (view == d->mCurrentView.data()) {
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continue;
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}
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view->setZoomToFill(fit);
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}
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d->updateOldPosition();
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}
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void DocumentViewSynchronizer::updatePosition()
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{
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QPoint pos = d->mCurrentView.data()->position();
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QPoint delta = pos - d->mOldPosition;
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d->mOldPosition = pos;
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for (DocumentView *view : qAsConst(*d->mViews)) {
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if (view == d->mCurrentView.data()) {
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continue;
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}
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view->setPosition(view->position() + delta);
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}
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}
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} // namespace
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#include "moc_documentviewsynchronizer.cpp"
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