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311 lines
8.7 KiB
311 lines
8.7 KiB
/*
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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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{
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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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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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}
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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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mScene->removeItem(item);
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delete item;
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item = NULL;
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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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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->setActiveDocumentScene(index);
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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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