Clément Fauconnier
7 years ago
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/*
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* Copyright (C) 2015-2016 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 "UBDocumentNavigator.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/memcheck.h" |
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/**
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* \brief Constructor |
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* @param parent as the parent widget |
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* @param name as the object name |
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*/ |
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UBDocumentNavigator::UBDocumentNavigator(QWidget *parent, const char *name):QGraphicsView(parent) |
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, mScene(NULL) |
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, mNbColumns(1) |
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, mThumbnailWidth(0) |
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, mThumbnailMinWidth(100) |
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, mSelectedThumbnail(NULL) |
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, mDropSource(NULL) |
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, mDropTarget(NULL) |
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, mDropBar(new QGraphicsRectItem()) |
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, mLongPressInterval(350) |
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{ |
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setObjectName(name); |
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mScene = new QGraphicsScene(this); |
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); |
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setScene(mScene); |
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mThumbnailWidth = width() - 2*border(); |
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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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mLongPressTimer.setInterval(mLongPressInterval); |
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mLongPressTimer.setSingleShot(true); |
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setFrameShadow(QFrame::Plain); |
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connect(UBApplication::boardController, SIGNAL(documentThumbnailsUpdated(UBDocumentContainer*)), this, SLOT(generateThumbnails(UBDocumentContainer*))); |
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connect(UBApplication::boardController, SIGNAL(documentPageUpdated(int)), this, SLOT(updateSpecificThumbnail(int))); |
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connect(UBApplication::boardController, SIGNAL(pageSelectionChanged(int)), this, SLOT(onScrollToSelectedPage(int))); |
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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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} |
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/**
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* \brief Destructor |
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*/ |
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UBDocumentNavigator::~UBDocumentNavigator() |
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{ |
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if(NULL != mScene) |
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{ |
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delete mScene; |
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mScene = NULL; |
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} |
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} |
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/**
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* \brief Generate the thumbnails |
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*/ |
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void UBDocumentNavigator::generateThumbnails(UBDocumentContainer* source) |
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{ |
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mThumbsWithLabels.clear(); |
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int selectedIndex = -1; |
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QList<QGraphicsItem*> graphicsItemList = mScene->items(); |
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for(int i = 0; i < graphicsItemList.size(); i+=1) |
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{ |
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QGraphicsItem* item = graphicsItemList.at(i); |
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if(item->isSelected()) |
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selectedIndex = i; |
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if (item != mDropBar) |
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{ |
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mScene->removeItem(item); |
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delete item; |
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item = NULL; |
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} |
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} |
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for(int i = 0; i < source->selectedDocument()->pageCount(); i++) |
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{ |
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//claudio This is a very bad hack and shows a architectural problem
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// source->selectedDocument()->pageCount() != source->pageCount()
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if(i>=source->pageCount() || source->pageAt(i)->isNull()) |
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source->insertThumbPage(i); |
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const QPixmap* pix = source->pageAt(i); |
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Q_ASSERT(!pix->isNull()); |
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int pageIndex = UBDocumentContainer::pageFromSceneIndex(i); |
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UBSceneThumbnailNavigPixmap* pixmapItem = new UBSceneThumbnailNavigPixmap(*pix, source->selectedDocument(), i); |
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QString label = tr("Page %0").arg(pageIndex); |
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UBThumbnailTextItem *labelItem = new UBThumbnailTextItem(label); |
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UBImgTextThumbnailElement thumbWithText(pixmapItem, labelItem); |
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thumbWithText.setBorder(border()); |
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mThumbsWithLabels.append(thumbWithText); |
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mScene->addItem(pixmapItem); |
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mScene->addItem(labelItem); |
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} |
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if (selectedIndex >= 0 && selectedIndex < mThumbsWithLabels.count()) |
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mSelectedThumbnail = mThumbsWithLabels.at(selectedIndex).getThumbnail(); |
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else |
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mSelectedThumbnail = NULL; |
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// Draw the items
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refreshScene(); |
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} |
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void UBDocumentNavigator::onScrollToSelectedPage(int index) |
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{ |
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int c = 0; |
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foreach(UBImgTextThumbnailElement el, mThumbsWithLabels) |
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{ |
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if (c==index) |
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{ |
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el.getThumbnail()->setSelected(true); |
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mSelectedThumbnail = el.getThumbnail(); |
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} |
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else |
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{ |
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el.getThumbnail()->setSelected(false); |
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} |
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c++; |
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} |
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if(NULL != mSelectedThumbnail) |
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centerOn(mSelectedThumbnail); |
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} |
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/**
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* \brief Refresh the given thumbnail |
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* @param iPage as the given page related thumbnail |
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*/ |
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void UBDocumentNavigator::updateSpecificThumbnail(int iPage) |
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{ |
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const QPixmap* pix = UBApplication::boardController->pageAt(iPage); |
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UBSceneThumbnailNavigPixmap* newItem = new UBSceneThumbnailNavigPixmap(*pix, UBApplication::boardController->selectedDocument(), iPage); |
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// Get the old thumbnail
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UBSceneThumbnailNavigPixmap* oldItem = mThumbsWithLabels.at(iPage).getThumbnail(); |
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if(NULL != oldItem) |
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{ |
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mScene->removeItem(oldItem); |
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mScene->addItem(newItem); |
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mThumbsWithLabels[iPage].setThumbnail(newItem); |
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delete oldItem; |
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oldItem = NULL; |
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} |
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} |
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/**
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* \brief Put the element in the right place in the scene. |
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*/ |
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void UBDocumentNavigator::refreshScene() |
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{ |
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qreal thumbnailHeight = mThumbnailWidth / UBSettings::minScreenRatio; |
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for(int i = 0; i < mThumbsWithLabels.size(); i++) |
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{ |
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// Get the item
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UBImgTextThumbnailElement& item = mThumbsWithLabels[i]; |
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int columnIndex = i % mNbColumns; |
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int rowIndex = i / mNbColumns; |
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item.Place(rowIndex, columnIndex, mThumbnailWidth, thumbnailHeight); |
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} |
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scene()->setSceneRect(scene()->itemsBoundingRect()); |
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} |
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/**
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* \brief Set the number of thumbnails columns |
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* @param nbColumns as the number of columns |
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*/ |
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void UBDocumentNavigator::setNbColumns(int nbColumns) |
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{ |
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mNbColumns = nbColumns; |
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} |
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/**
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* \brief Get the number of columns |
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* @return the number of thumbnails columns |
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*/ |
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int UBDocumentNavigator::nbColumns() |
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{ |
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return mNbColumns; |
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} |
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/**
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* \brief Set the thumbnails minimum width |
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* @param width as the minimum width |
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*/ |
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void UBDocumentNavigator::setThumbnailMinWidth(int width) |
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{ |
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mThumbnailMinWidth = width; |
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} |
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/**
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* \brief Get the thumbnails minimum width |
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* @return the minimum thumbnails width |
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*/ |
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int UBDocumentNavigator::thumbnailMinWidth() |
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{ |
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return mThumbnailMinWidth; |
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} |
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/**
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* \brief Get the border size |
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* @return the border size in pixels |
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*/ |
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int UBDocumentNavigator::border() |
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{ |
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return 20; |
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} |
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/**
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* \brief Handle the resize event |
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* @param event as the resize event |
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*/ |
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void UBDocumentNavigator::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() - 2*border() : mThumbnailMinWidth; |
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if(mSelectedThumbnail) |
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centerOn(mSelectedThumbnail); |
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// Refresh the scene
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refreshScene(); |
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} |
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/**
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* \brief Handle the mouse press event |
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* @param event as the mouse event |
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*/ |
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void UBDocumentNavigator::mousePressEvent(QMouseEvent *event) |
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{ |
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mLongPressTimer.start(); |
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mLastPressedMousePos = event->pos(); |
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QGraphicsItem* pClickedItem = itemAt(event->pos()); |
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if(NULL != pClickedItem) |
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{ |
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// First, select the clicked item
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UBSceneThumbnailNavigPixmap* pCrntItem = dynamic_cast<UBSceneThumbnailNavigPixmap*>(pClickedItem); |
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if(NULL == pCrntItem) |
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{ |
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// If we fall here we may have clicked on the label instead of the thumbnail
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UBThumbnailTextItem* pTextItem = dynamic_cast<UBThumbnailTextItem*>(pClickedItem); |
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if(NULL != pTextItem) |
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{ |
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for(int i = 0; i < mThumbsWithLabels.size(); i++) |
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{ |
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const UBImgTextThumbnailElement& el = mThumbsWithLabels.at(i); |
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if(el.getCaption() == pTextItem) |
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{ |
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pCrntItem = el.getThumbnail(); |
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break; |
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} |
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} |
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} |
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} |
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int index = 0; |
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for(int i = 0; i < mThumbsWithLabels.size(); i++) |
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{ |
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if (mThumbsWithLabels.at(i).getThumbnail() == pCrntItem) |
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{ |
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mSelectedThumbnail = pCrntItem; |
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index = i; |
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break; |
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} |
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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(index); |
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UBApplication::boardController->centerOn(UBApplication::boardController->activeScene()->lastCenter()); |
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} |
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QGraphicsView::mousePressEvent(event); |
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} |
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void UBDocumentNavigator::mouseReleaseEvent(QMouseEvent *event) |
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{ |
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event->accept(); |
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} |
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void UBDocumentNavigator::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 UBDocumentNavigator::mousePressAndHoldEvent(QPoint pos) |
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{ |
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UBSceneThumbnailNavigPixmap* item = dynamic_cast<UBSceneThumbnailNavigPixmap*>(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->pixmap().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 UBDocumentNavigator::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 UBDocumentNavigator::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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UBSceneThumbnailNavigPixmap* item = dynamic_cast<UBSceneThumbnailNavigPixmap*>(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, mThumbnailWidth-verticalScrollBar()->width(), 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, mThumbnailWidth-verticalScrollBar()->width(), 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 UBDocumentNavigator::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; |
||||||
|
mDropTarget = NULL; |
||||||
|
|
||||||
|
mDropBar->setRect(QRectF()); |
||||||
|
mDropBar->hide(); |
||||||
|
} |
||||||
@ -0,0 +1,108 @@ |
|||||||
|
/*
|
||||||
|
* Copyright (C) 2015-2016 Département de l'Instruction Publique (DIP-SEM) |
||||||
|
* |
||||||
|
* Copyright (C) 2013 Open Education Foundation |
||||||
|
* |
||||||
|
* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour |
||||||
|
* l'Education Numérique en Afrique (GIP ENA) |
||||||
|
* |
||||||
|
* This file is part of OpenBoard. |
||||||
|
* |
||||||
|
* OpenBoard 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, version 3 of the License, |
||||||
|
* with a specific linking exception for the OpenSSL project's |
||||||
|
* "OpenSSL" library (or with modified versions of it that use the |
||||||
|
* same license as the "OpenSSL" library). |
||||||
|
* |
||||||
|
* OpenBoard 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 OpenBoard. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/ |
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef UBDOCUMENTNAVIGATOR_H |
||||||
|
#define UBDOCUMENTNAVIGATOR_H |
||||||
|
|
||||||
|
#include <QResizeEvent> |
||||||
|
#include <QGraphicsView> |
||||||
|
#include <QGraphicsScene> |
||||||
|
#include <QMouseEvent> |
||||||
|
#include <QThread> |
||||||
|
|
||||||
|
#include "document/UBDocumentProxy.h" |
||||||
|
#include "document/UBDocumentContainer.h" |
||||||
|
#include "UBThumbnailWidget.h" |
||||||
|
|
||||||
|
#define NO_PAGESELECTED -1 |
||||||
|
|
||||||
|
class UBDocumentNavigator : public QGraphicsView |
||||||
|
{ |
||||||
|
Q_OBJECT |
||||||
|
public: |
||||||
|
UBDocumentNavigator(QWidget* parent=0, const char* name="documentNavigator"); |
||||||
|
~UBDocumentNavigator(); |
||||||
|
|
||||||
|
void setNbColumns(int nbColumns); |
||||||
|
int nbColumns(); |
||||||
|
void setThumbnailMinWidth(int width); |
||||||
|
int thumbnailMinWidth(); |
||||||
|
|
||||||
|
public slots: |
||||||
|
void onScrollToSelectedPage(int index);// { if (mCrntItem) centerOn(mCrntItem); }
|
||||||
|
void generateThumbnails(UBDocumentContainer* source); |
||||||
|
void updateSpecificThumbnail(int iPage);
|
||||||
|
|
||||||
|
void longPressTimeout(); |
||||||
|
void mousePressAndHoldEvent(QPoint pos); |
||||||
|
|
||||||
|
protected: |
||||||
|
virtual void resizeEvent(QResizeEvent *event); |
||||||
|
virtual void mousePressEvent(QMouseEvent *event); |
||||||
|
virtual void mouseReleaseEvent(QMouseEvent *event); |
||||||
|
|
||||||
|
virtual void dragEnterEvent(QDragEnterEvent* event); |
||||||
|
virtual void dragMoveEvent(QDragMoveEvent* event); |
||||||
|
virtual void dropEvent(QDropEvent* event); |
||||||
|
|
||||||
|
signals: |
||||||
|
void mousePressAndHoldEventRequired(QPoint pos); |
||||||
|
void moveThumbnailRequired(int from, int to); |
||||||
|
|
||||||
|
private: |
||||||
|
|
||||||
|
void refreshScene(); |
||||||
|
int border(); |
||||||
|
|
||||||
|
/** The scene */ |
||||||
|
QGraphicsScene* mScene; |
||||||
|
/** The current selected item */ |
||||||
|
//UBSceneThumbnailNavigPixmap* mCrntItem;
|
||||||
|
/** The list of current thumbnails with labels*/ |
||||||
|
QList<UBImgTextThumbnailElement> mThumbsWithLabels; |
||||||
|
/** The current number of columns */ |
||||||
|
int mNbColumns; |
||||||
|
/** The current thumbnails width */ |
||||||
|
int mThumbnailWidth; |
||||||
|
/** The current thumbnails minimum width */ |
||||||
|
int mThumbnailMinWidth; |
||||||
|
/** The selected thumbnail */ |
||||||
|
UBSceneThumbnailNavigPixmap* mSelectedThumbnail; |
||||||
|
|
||||||
|
UBSceneThumbnailNavigPixmap* mDropSource; |
||||||
|
UBSceneThumbnailNavigPixmap* mDropTarget; |
||||||
|
QGraphicsRectItem *mDropBar; |
||||||
|
|
||||||
|
int mLongPressInterval; |
||||||
|
QTimer mLongPressTimer; |
||||||
|
QPoint mLastPressedMousePos; |
||||||
|
}; |
||||||
|
|
||||||
|
#endif // UBDOCUMENTNAVIGATOR_H
|
||||||
|
|
||||||
Loading…
Reference in new issue