новые иконки в OpenBoard
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OpenBoard/src/gui/UBDocumentNavigator.cpp

384 lines
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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QList>
#include <QPointF>
#include <QPixmap>
#include <QTransform>
#include <QScrollBar>
#include <QFontMetrics>
#include <QGraphicsItem>
#include <QGraphicsPixmapItem>
#include "core/UBApplication.h"
#include "UBDocumentNavigator.h"
#include "board/UBBoardController.h"
#include "adaptors/UBThumbnailAdaptor.h"
#include "adaptors/UBSvgSubsetAdaptor.h"
#include "document/UBDocumentController.h"
#include "domain/UBGraphicsScene.h"
#include "board/UBBoardPaletteManager.h"
#include "core/UBApplicationController.h"
#include "core/memcheck.h"
/**
* \brief Constructor
* @param parent as the parent widget
* @param name as the object name
*/
UBDocumentNavigator::UBDocumentNavigator(QWidget *parent, const char *name):QGraphicsView(parent)
, mScene(NULL)
, mCrntItem(NULL)
, mCrntDoc(NULL)
, mNbColumns(1)
, mThumbnailWidth(0)
, mThumbnailMinWidth(100)
, bNavig(false)
{
setObjectName(name);
mScene = new QGraphicsScene(this);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setScene(mScene);
mThumbnailWidth = width() - 2*border();
setFrameShadow(QFrame::Plain);
connect(UBApplication::boardController, SIGNAL(activeSceneChanged()), this, SLOT(generateThumbnails()));
connect(UBApplication::boardController, SIGNAL(newPageAdded()), this, SLOT(addNewPage()));
connect(mScene, SIGNAL(selectionChanged()), this, SLOT(onSelectionChanged()));
connect(UBApplication::boardController, SIGNAL(documentReorganized(int)), this, SLOT(onMovedToIndex(int)));
connect(UBApplication::boardController, SIGNAL(scrollToSelectedPage()), this, SLOT(onScrollToSelectedPage()));
}
/**
* \brief Destructor
*/
UBDocumentNavigator::~UBDocumentNavigator()
{
if(NULL != mCrntItem)
{
delete mCrntItem;
mCrntItem = NULL;
}
if(NULL != mScene)
{
delete mScene;
mScene = NULL;
}
}
/**
* \brief Set the current document
* @param document as the new document
*/
void UBDocumentNavigator::setDocument(UBDocumentProxy *document)
{
// Here we set a new document to the navigator. We must clear the current
// content and add all the pages of the given document.
if(document)
{
mCrntDoc = document;
}
}
/**
* \brief Generate the thumbnails
*/
void UBDocumentNavigator::generateThumbnails()
{
// Get the thumbnails
QList<QPixmap> thumbs = UBThumbnailAdaptor::load(mCrntDoc);
mThumbsWithLabels.clear();
foreach(QGraphicsItem* it, mScene->items())
{
mScene->removeItem(it);
delete it;
}
for(int i = 0; i < thumbs.count(); i++)
{
QPixmap pix = thumbs.at(i);
QGraphicsPixmapItem* pixmapItem = new UBSceneThumbnailNavigPixmap(pix, mCrntDoc, i);
UBThumbnailTextItem *labelItem = new UBThumbnailTextItem(tr("Page %0").arg(UBApplication::boardController->pageFromSceneIndex(i)));
UBImgTextThumbnailElement thumbWithText(pixmapItem, labelItem);
thumbWithText.setBorder(border());
mThumbsWithLabels.append(thumbWithText);
mScene->addItem(pixmapItem);
mScene->addItem(labelItem);
// Get the selected item
if(UBApplication::boardController->activeSceneIndex() == i)
{
mCrntItem = dynamic_cast<UBSceneThumbnailNavigPixmap*>(pixmapItem);
mCrntItem->setSelected(true);
}
}
// Draw the items
refreshScene();
}
/**
* \brief Refresh the given thumbnail
* @param iPage as the given page related thumbnail
*/
void UBDocumentNavigator::updateSpecificThumbnail(int iPage)
{
// Generate the new thumbnail
UBGraphicsScene* pScene = UBApplication::boardController->activeScene();
if(NULL != pScene)
{
// Save the current state of the scene
pScene->setModified(true);
if(UBApplication::boardController)
{
UBApplication::boardController->persistCurrentScene();
}else
{
UBThumbnailAdaptor::persistScene(mCrntDoc->persistencePath(), pScene, iPage);
}
// Load it
QPixmap pix = UBThumbnailAdaptor::load(mCrntDoc, iPage);
UBSceneThumbnailNavigPixmap* pixmapItem = new UBSceneThumbnailNavigPixmap(pix, mCrntDoc, iPage);
if(pixmapItem)
{
// Get the old thumbnail
QGraphicsItem* pItem = mThumbsWithLabels.at(iPage).getThumbnail();
if(NULL != pItem)
{
mScene->removeItem(pItem);
mScene->addItem(pixmapItem);
mThumbsWithLabels[iPage].setThumbnail(pixmapItem);
delete pItem;
}
}
}
}
/**
* \brief Add a new page to the thumbnails list
*
* This method is called automatically by the board controller each time the user
* adds a new page, duplicates a page or imports a document.
*/
void UBDocumentNavigator::addNewPage()
{
if(!bNavig)
{
generateThumbnails();
if(NULL != mCrntItem)
{
mCrntItem->setSelected(true);
}
}
}
/**
* \brief Put the element in the right place in the scene.
*/
void UBDocumentNavigator::refreshScene()
{
qreal thumbnailHeight = mThumbnailWidth / UBSettings::minScreenRatio;
for(int i = 0; i < mThumbsWithLabels.size(); i++)
{
// Get the item
UBImgTextThumbnailElement& item = mThumbsWithLabels[i];
int columnIndex = i % mNbColumns;
int rowIndex = i / mNbColumns;
item.Place(rowIndex, columnIndex, mThumbnailWidth, thumbnailHeight);
}
}
/**
* \brief Set the number of thumbnails columns
* @param nbColumns as the number of columns
*/
void UBDocumentNavigator::setNbColumns(int nbColumns)
{
mNbColumns = nbColumns;
}
/**
* \brief Get the number of columns
* @return the number of thumbnails columns
*/
int UBDocumentNavigator::nbColumns()
{
return mNbColumns;
}
/**
* \brief Set the thumbnails minimum width
* @param width as the minimum width
*/
void UBDocumentNavigator::setThumbnailMinWidth(int width)
{
mThumbnailMinWidth = width;
}
/**
* \brief Get the thumbnails minimum width
* @return the minimum thumbnails width
*/
int UBDocumentNavigator::thumbnailMinWidth()
{
return mThumbnailMinWidth;
}
/**
* \brief Get the border size
* @return the border size in pixels
*/
int UBDocumentNavigator::border()
{
return 20;
}
/**
* \brief Handle the resize event
* @param event as the resize event
*/
void UBDocumentNavigator::resizeEvent(QResizeEvent *event)
{
Q_UNUSED(event);
// Update the thumbnails width
mThumbnailWidth = (width() > mThumbnailMinWidth) ? width() - 2*border() : mThumbnailMinWidth;
// Refresh the scene
refreshScene();
}
/**
* \brief Handle the mouse press event
* @param event as the mouse event
*/
void UBDocumentNavigator::mousePressEvent(QMouseEvent *event)
{
QGraphicsItem* pClickedItem = itemAt(event->pos());
if(NULL != pClickedItem)
{
bNavig = true;
// First, select the clicked item
UBSceneThumbnailNavigPixmap* pCrntItem = dynamic_cast<UBSceneThumbnailNavigPixmap*>(pClickedItem);
if(NULL == pCrntItem)
{
// If we fall here we may have clicked on the label instead of the thumbnail
UBThumbnailTextItem* pTextItem = dynamic_cast<UBThumbnailTextItem*>(pClickedItem);
if(NULL != pTextItem)
{
for(int i = 0; i < mThumbsWithLabels.size(); i++)
{
const UBImgTextThumbnailElement& el = mThumbsWithLabels.at(i);
if(el.getCaption() == pTextItem)
{
pCrntItem = dynamic_cast<UBSceneThumbnailNavigPixmap*>(el.getThumbnail());
break;
}
}
}
}
else
{
if(NULL != mCrntItem && mCrntItem != pCrntItem)
{
// Unselect the previous item
mCrntItem->setSelected(false);
int iOldPage = -1;
for(int i = 0; i < mThumbsWithLabels.size(); i++)
if (mThumbsWithLabels.at(i).getThumbnail() == mCrntItem)
{
iOldPage = i;
break;
}
updateSpecificThumbnail(iOldPage);
mCrntItem = pCrntItem;
// Then display the related page
emit changeCurrentPage();
refreshScene();
}
}
bNavig = false;
}
QGraphicsView::mousePressEvent(event);
}
/**
* \brief Get the selected page number
* @return the selected page number
*/
int UBDocumentNavigator::selectedPageNumber()
{
int nbr = NO_PAGESELECTED;
if(NULL != mCrntItem)
{
for(int i = 0; i < mThumbsWithLabels.size(); i++)
if (mThumbsWithLabels.at(i).getThumbnail() == mCrntItem)
{
nbr = i;
break;
}
}
return nbr;
}
/**
* \brief Get the current document
* @return the current document
*/
UBDocumentProxy* UBDocumentNavigator::currentDoc()
{
return mCrntDoc;
}
/**
* \brief Occurs when the selection changed
*/
void UBDocumentNavigator::onSelectionChanged()
{
// QList<QGraphicsItem*> qlItems = mScene->selectedItems();
// qDebug() << "The number of selected items is " << qlItems.count();
}
/**
* \brief Occurs when a page has been moved to another index in the document
* @param index as the new index
*/
void UBDocumentNavigator::onMovedToIndex(int index)
{
if(index < mThumbsWithLabels.size()){
UBSceneThumbnailNavigPixmap* pItem = dynamic_cast<UBSceneThumbnailNavigPixmap*>(mThumbsWithLabels.at(index).getThumbnail());
if(NULL != pItem)
{
if(mCrntItem) mCrntItem->setSelected(false);//deselecting previous one
mCrntItem = pItem;
mCrntItem->setSelected(true);
centerOn(mCrntItem);
}
}
}