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339 lines
11 KiB
339 lines
11 KiB
/*
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* Copyright (C) 2015-2022 Département de l'Instruction Publique (DIP-SEM)
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*
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* Copyright (C) 2013 Open Education Foundation
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*
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* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
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* l'Education Numérique en Afrique (GIP ENA)
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*
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* This file is part of OpenBoard.
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*
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* OpenBoard is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License,
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* with a specific linking exception for the OpenSSL project's
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* "OpenSSL" library (or with modified versions of it that use the
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* same license as the "OpenSSL" library).
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*
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* OpenBoard 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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*
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* You should have received a copy of the GNU General Public License
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* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <QList>
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#include <QPointF>
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#include <QPixmap>
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#include <QTransform>
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#include <QScrollBar>
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#include <QFontMetrics>
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#include <QGraphicsItem>
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#include <QGraphicsPixmapItem>
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#include "core/UBApplication.h"
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#include "UBBoardThumbnailsView.h"
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#include "board/UBBoardController.h"
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#include "adaptors/UBThumbnailAdaptor.h"
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#include "adaptors/UBSvgSubsetAdaptor.h"
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#include "document/UBDocumentController.h"
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#include "domain/UBGraphicsScene.h"
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#include "board/UBBoardPaletteManager.h"
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#include "core/UBApplicationController.h"
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#include "core/UBPersistenceManager.h"
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#include "UBThumbnailView.h"
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UBBoardThumbnailsView::UBBoardThumbnailsView(QWidget *parent, const char *name)
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: QGraphicsView(parent)
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, mThumbnailWidth(0)
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, mThumbnailMinWidth(100)
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, mMargin(20)
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, mDropSource(NULL)
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, mDropTarget(NULL)
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, mDropBar(new QGraphicsRectItem(0))
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, mLongPressInterval(350)
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{
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setScene(new QGraphicsScene(this));
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mDropBar->setPen(QPen(Qt::darkGray));
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mDropBar->setBrush(QBrush(Qt::lightGray));
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scene()->addItem(mDropBar);
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mDropBar->hide();
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setObjectName(name);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setFrameShadow(QFrame::Plain);
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mThumbnailWidth = width() - 2*mMargin;
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mLongPressTimer.setInterval(mLongPressInterval);
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mLongPressTimer.setSingleShot(true);
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connect(UBApplication::boardController, SIGNAL(initThumbnailsRequired(UBDocumentContainer*)), this, SLOT(initThumbnails(UBDocumentContainer*)), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(addThumbnailRequired(UBDocumentContainer*, int)), this, SLOT(addThumbnail(UBDocumentContainer*, int)), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(moveThumbnailRequired(int, int)), this, SLOT(moveThumbnail(int, int)), Qt::UniqueConnection);
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connect(this, SIGNAL(moveThumbnailRequired(int, int)), this, SLOT(moveThumbnail(int, int)), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(updateThumbnailsRequired()), this, SLOT(updateThumbnails()), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(removeThumbnailRequired(int)), this, SLOT(removeThumbnail(int)), Qt::UniqueConnection);
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connect(&mLongPressTimer, SIGNAL(timeout()), this, SLOT(longPressTimeout()), Qt::UniqueConnection);
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connect(this, SIGNAL(mousePressAndHoldEventRequired(QPoint)), this, SLOT(mousePressAndHoldEvent(QPoint)), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(pageSelectionChanged(int)), this, SLOT(ensureVisibleThumbnail(int)), Qt::UniqueConnection);
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connect(UBApplication::boardController, SIGNAL(centerOnThumbnailRequired(int)), this, SLOT(centerOnThumbnail(int)), Qt::UniqueConnection);
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}
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void UBBoardThumbnailsView::moveThumbnail(int from, int to)
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{
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mThumbnails.move(from, to);
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updateThumbnailsPos();
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}
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void UBBoardThumbnailsView::updateThumbnails()
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{
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updateThumbnailsPos();
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}
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void UBBoardThumbnailsView::removeThumbnail(int i)
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{
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UBDraggableThumbnailView* item = mThumbnails.at(i);
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scene()->removeItem(item->pageNumber());
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scene()->removeItem(item);
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mThumbnails.removeAt(i);
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updateThumbnailsPos();
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}
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UBDraggableThumbnailView* UBBoardThumbnailsView::createThumbnail(UBDocumentContainer* source, int i)
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{
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UBApplication::showMessage(tr("Loading page (%1/%2)").arg(i+1).arg(source->selectedDocument()->pageCount()));
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UBGraphicsScene* pageScene = UBPersistenceManager::persistenceManager()->loadDocumentScene(source->selectedDocument(), i);
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UBThumbnailView* pageView = new UBThumbnailView(pageScene);
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return new UBDraggableThumbnailView(pageView, source->selectedDocument(), i);
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}
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void UBBoardThumbnailsView::addThumbnail(UBDocumentContainer* source, int i)
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{
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UBDraggableThumbnailView* item = createThumbnail(source, i);
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mThumbnails.insert(i, item);
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scene()->addItem(item);
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scene()->addItem(item->pageNumber());
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updateThumbnailsPos();
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}
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void UBBoardThumbnailsView::clearThumbnails()
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{
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for(int i = 0; i < mThumbnails.size(); i++)
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{
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scene()->removeItem(mThumbnails.at(i)->pageNumber());
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scene()->removeItem(mThumbnails.at(i));
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mThumbnails.at(i)->deleteLater();
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}
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mThumbnails.clear();
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}
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void UBBoardThumbnailsView::initThumbnails(UBDocumentContainer* source)
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{
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clearThumbnails();
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for(int i = 0; i < source->selectedDocument()->pageCount(); i++)
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{
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mThumbnails.append(createThumbnail(source, i));
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scene()->addItem(mThumbnails.last());
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scene()->addItem(mThumbnails.last()->pageNumber());
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}
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updateThumbnailsPos();
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}
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void UBBoardThumbnailsView::centerOnThumbnail(int index)
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{
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centerOn(mThumbnails.at(index));
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}
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void UBBoardThumbnailsView::ensureVisibleThumbnail(int index)
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{
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ensureVisible(mThumbnails.at(index));
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}
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void UBBoardThumbnailsView::updateThumbnailsPos()
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{
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qreal thumbnailHeight = mThumbnailWidth / UBSettings::minScreenRatio;
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for (int i=0; i < mThumbnails.length(); i++)
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{
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mThumbnails.at(i)->setSceneIndex(i);
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mThumbnails.at(i)->setPageNumber(i);
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mThumbnails.at(i)->updatePos(mThumbnailWidth, thumbnailHeight);
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}
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scene()->setSceneRect(0, 0, scene()->itemsBoundingRect().size().width() - verticalScrollBar()->width(), scene()->itemsBoundingRect().size().height());
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update();
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}
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void UBBoardThumbnailsView::resizeEvent(QResizeEvent *event)
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{
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Q_UNUSED(event);
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// Update the thumbnails width
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mThumbnailWidth = (width() > mThumbnailMinWidth) ? width() - verticalScrollBar()->width() - 2*mMargin : mThumbnailMinWidth;
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// Refresh the scene
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updateThumbnailsPos();
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emit UBApplication::boardController->centerOnThumbnailRequired(UBApplication::boardController->activeSceneIndex());
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}
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void UBBoardThumbnailsView::mousePressEvent(QMouseEvent *event)
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{
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QGraphicsView::mousePressEvent(event);
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if (!event->isAccepted())
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{
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mLongPressTimer.start();
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mLastPressedMousePos = event->pos();
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UBDraggableThumbnailView* item = dynamic_cast<UBDraggableThumbnailView*>(itemAt(event->pos()));
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if (item)
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{
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UBApplication::boardController->persistViewPositionOnCurrentScene();
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UBApplication::boardController->persistCurrentScene();
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UBApplication::boardController->setActiveDocumentScene(item->sceneIndex());
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UBApplication::boardController->centerOn(UBApplication::boardController->activeScene()->lastCenter());
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}
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}
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}
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void UBBoardThumbnailsView::mouseMoveEvent(QMouseEvent *event)
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{
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QGraphicsView::mouseMoveEvent(event);
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}
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void UBBoardThumbnailsView::longPressTimeout()
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{
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if (QApplication::mouseButtons() != Qt::NoButton)
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emit mousePressAndHoldEventRequired(mLastPressedMousePos);
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mLongPressTimer.stop();
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}
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void UBBoardThumbnailsView::mousePressAndHoldEvent(QPoint pos)
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{
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UBDraggableThumbnailView* item = dynamic_cast<UBDraggableThumbnailView*>(itemAt(pos));
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if (item)
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{
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mDropSource = item;
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mDropTarget = item;
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QPixmap pixmap = item->widget()->grab().scaledToWidth(mThumbnailWidth/2);
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QDrag *drag = new QDrag(this);
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drag->setMimeData(new QMimeData());
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drag->setPixmap(pixmap);
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drag->setHotSpot(QPoint(pixmap.width()/2, pixmap.height()/2));
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drag->exec();
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}
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}
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void UBBoardThumbnailsView::mouseReleaseEvent(QMouseEvent *event)
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{
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mLongPressTimer.stop();
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QGraphicsView::mouseReleaseEvent(event);
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}
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void UBBoardThumbnailsView::dragEnterEvent(QDragEnterEvent *event)
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{
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mDropBar->show();
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if (event->source() == this)
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{
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event->setDropAction(Qt::MoveAction);
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event->accept();
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}
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else
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{
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event->acceptProposedAction();
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}
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}
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void UBBoardThumbnailsView::dragMoveEvent(QDragMoveEvent *event)
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{
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QPointF position = event->pos();
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//autoscroll during drag'n'drop
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QPointF scenePos = mapToScene(position.toPoint());
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int thumbnailHeight = mThumbnailWidth / UBSettings::minScreenRatio;
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QRectF thumbnailArea(0, scenePos.y() - thumbnailHeight/2, mThumbnailWidth, thumbnailHeight);
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ensureVisible(thumbnailArea);
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UBDraggableThumbnailView* item = dynamic_cast<UBDraggableThumbnailView*>(itemAt(position.toPoint()));
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if (item)
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{
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if (item != mDropTarget)
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mDropTarget = item;
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qreal scale = item->transform().m11();
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QPointF itemCenter(item->pos().x() + (item->boundingRect().width()-verticalScrollBar()->width()) * scale,
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item->pos().y() + item->boundingRect().height() * scale / 2);
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bool dropAbove = mapToScene(position.toPoint()).y() < itemCenter.y();
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bool movingUp = mDropSource->sceneIndex() > item->sceneIndex();
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qreal y = 0;
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if (movingUp)
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{
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if (dropAbove)
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{
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y = item->pos().y() - UBSettings::thumbnailSpacing / 2;
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if (mDropBar->y() != y)
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mDropBar->setRect(QRectF(item->pos().x(), y, (item->boundingRect().width()-verticalScrollBar()->width())*scale, 3));
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}
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}
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else
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{
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if (!dropAbove)
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{
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y = item->pos().y() + item->boundingRect().height() * scale + UBSettings::thumbnailSpacing / 2;
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if (mDropBar->y() != y)
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mDropBar->setRect(QRectF(item->pos().x(), y, (item->boundingRect().width()-verticalScrollBar()->width())*scale, 3));
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}
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}
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}
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event->acceptProposedAction();
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}
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void UBBoardThumbnailsView::dropEvent(QDropEvent *event)
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{
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Q_UNUSED(event);
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if (mDropSource->sceneIndex() != mDropTarget->sceneIndex())
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UBApplication::boardController->moveSceneToIndex(mDropSource->sceneIndex(), mDropTarget->sceneIndex());
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mDropSource = NULL;
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mDropTarget = NULL;
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mDropBar->setRect(QRectF());
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mDropBar->hide();
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}
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