File indexing completed on 2024-04-14 04:02:08

 /*
     SPDX-FileCopyrightText: 1999-2006 Éric Bischoff <ebischoff@nerim.net>
     SPDX-FileCopyrightText: 2007-2008 Albert Astals Cid <aacid@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 /* Play ground widget */
 
 #include "playground.h"
 
 #include <KConfig>
 #include <KConfigGroup>
 #include "ktuberling_debug.h"
 
 #include <QAction>
 #include <QApplication>
 #include <QCursor>
 #include <QDataStream>
 #include <QDir>
 #include <QDomDocument>
 #include <QFile>
 #include <QFileInfo>
 #include <QGraphicsSvgItem>
 #include <QMouseEvent>
 #include <QPainter>
 #include <QPagedPaintDevice>
 
 #include "action.h"
 #include "filefactory.h"
 #include "todraw.h"
 
 static const char *saveGameTextScaleTextMode = "KTuberlingSaveGameV2";
 static const char *saveGameTextTextMode = "KTuberlingSaveGameV3";
 static const char *saveGameText = "KTuberlingSaveGameV4";
 
 // Constructor
 PlayGround::PlayGround(PlayGroundCallbacks *callbacks, QWidget *parent)
     : QGraphicsView(parent), m_callbacks(callbacks), m_newItem(nullptr), m_dragItem(nullptr), m_nextZValue(1), m_lockAspect(false), m_allowOnlyDrag(false)
 {
   setFrameStyle(QFrame::NoFrame);
   setOptimizationFlag(QGraphicsView::DontSavePainterState, true); // all items here save the painter state
   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
   setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
   setMouseTracking(true);
 }
 
 // Destructor
 PlayGround::~PlayGround()
 {
   for (const SceneData &data : std::as_const(m_scenes))
   {
     delete data.scene;
     delete data.undoStack;
   }
 }
 
 // Reset the play ground
 void PlayGround::reset()
 {
 
   const QList<QGraphicsItem*> items = scene()->items();
   for(QGraphicsItem *item : items)
   {
     ToDraw *currentObject = qgraphicsitem_cast<ToDraw *>(item);
     delete currentObject;
   }
 
   undoStack()->clear();
 }
 
 // Save objects laid down on the editable area
 bool PlayGround::saveAs(const QString & name)
 {
   QFile f(name);
   if (!f.open( QIODevice::WriteOnly ) )
       return false;
 
   QFileInfo gameBoard(m_gameboardFile);
   QDataStream out(&f);
   out.setVersion(QDataStream::Qt_4_5);
   out << QString::fromLatin1(saveGameText);
   out << gameBoard.fileName();
   const QList<QGraphicsItem*> items = scene()->items();
   for(QGraphicsItem *item : items)
   {
     ToDraw *currentObject = qgraphicsitem_cast<ToDraw *>(item);
     if (currentObject != nullptr) currentObject->save(out);
   }
 
   return (f.error() == QFile::NoError);
 }
 
 // Print gameboard's picture
 bool PlayGround::printPicture(QPagedPaintDevice &printer)
 {
   QPainter artist;
   QPixmap picture(getPicture());
 
   if (!artist.begin(&printer)) return false;
   artist.drawPixmap(QPoint(32, 32), picture);
   if (!artist.end()) return false;
   return true;
 }
 
 // Get a pixmap containing the current picture
 QPixmap PlayGround::getPicture()
 {
   QPixmap result(mapFromScene(backgroundRect()).boundingRect().size());
   QPainter artist(&result);
   scene()->render(&artist, QRectF(), backgroundRect(), Qt::IgnoreAspectRatio);
   artist.end();
   return result;
 }
 
 void PlayGround::connectRedoAction(QAction *action)
 {
   connect(action, &QAction::triggered, &m_undoGroup, &QUndoGroup::redo);
   connect(&m_undoGroup, &QUndoGroup::canRedoChanged, action, &QAction::setEnabled);
 }
 
 void PlayGround::connectUndoAction(QAction *action)
 {
   connect(action, &QAction::triggered, &m_undoGroup, &QUndoGroup::undo);
   connect(&m_undoGroup, &QUndoGroup::canUndoChanged, action, &QAction::setEnabled);
 }
 
 // Mouse pressed event
 void PlayGround::mousePressEvent(QMouseEvent *event)
 {
   if (m_gameboardFile.isEmpty()) return;
 
   if (event->button() != Qt::LeftButton) return;
 
   m_mousePressPos = event->pos();
 
   if (m_dragItem) placeDraggedItem(event->pos());
   else if (m_newItem) placeNewItem(event->pos());
   else
   {
     // see if the user clicked on the warehouse of items
     QPointF scenePos = mapToScene(event->pos());
     QMap<QString, QString>::const_iterator it, itEnd;
     it = m_objectsNameSound.constBegin();
     itEnd = m_objectsNameSound.constEnd();
     QString foundElem;
     QRectF bounds;
     for( ; foundElem.isNull() && it != itEnd; ++it)
     {
       bounds = m_SvgRenderer.boundsOnElement(it.key());
       if (bounds.contains(scenePos)) foundElem = it.key();
     }
 
     if (!foundElem.isNull())
     {
       const double objectScale = m_objectsNameRatio.value(foundElem);
       const QSizeF elementSize = m_SvgRenderer.boundsOnElement(foundElem).size() * objectScale;
       QPointF itemPos = mapToScene(event->pos());
       itemPos -= QPointF(elementSize.width()/2, elementSize.height()/2);
 
       m_callbacks->playSound(m_objectsNameSound.value(foundElem));
 
       m_newItem = new ToDraw;
       m_newItem->setBeingDragged(true);
       m_newItem->setPos(clipPos(itemPos, m_newItem));
       m_newItem->setSharedRenderer(&m_SvgRenderer);
       m_newItem->setElementId(foundElem);
       m_newItem->setZValue(m_nextZValue);
       m_nextZValue++;
       m_newItem->setTransform(QTransform::fromScale(objectScale, objectScale));
 
       scene()->addItem(m_newItem);
       setCursor(Qt::BlankCursor);
     }
     else
     {
       // see if the user clicked on an already existent item
       QGraphicsItem *dragItem = scene()->itemAt(mapToScene(event->pos()), QTransform());
       m_dragItem = qgraphicsitem_cast<ToDraw*>(dragItem);
       if (m_dragItem)
       {
         QString elem = m_dragItem->elementId();
 
         m_callbacks->playSound(m_objectsNameSound.value(elem));
         setCursor(Qt::BlankCursor);
         m_dragItem->setBeingDragged(true);
         m_itemDraggedPos = m_dragItem->pos();
 
         const QSizeF elementSize = m_dragItem->transform().mapRect(m_dragItem->unclippedRect()).size();
         QPointF itemPos = mapToScene(event->pos());
         itemPos -= QPointF(elementSize.width()/2, elementSize.height()/2);
         m_dragItem->setPos(clipPos(itemPos, m_dragItem));
       }
     }
   }
 }
 
 void PlayGround::mouseMoveEvent(QMouseEvent *event)
 {
   ToDraw *movingItem = m_newItem ? m_newItem : m_dragItem;
   if (movingItem) {
     QPointF itemPos = mapToScene(event->pos());
     const QSizeF elementSize = movingItem->transform().mapRect(movingItem->unclippedRect()).size();
     itemPos -= QPointF(elementSize.width()/2, elementSize.height()/2);
 
     movingItem->setPos(clipPos(itemPos, movingItem));
   }
 }
 
 void PlayGround::mouseReleaseEvent(QMouseEvent *event)
 {
   QPoint point = event->pos() - m_mousePressPos;
   if (m_allowOnlyDrag || point.manhattanLength() > qApp->startDragDistance()) {
       if (m_dragItem) placeDraggedItem(event->pos());
       else if (m_newItem) placeNewItem(event->pos());
   }
 }
 
 bool PlayGround::insideBackground(const QSizeF &size, const QPointF &pos) const
 {
   return backgroundRect().intersects(QRectF(pos, size));
 }
 
 QPointF PlayGround::clipPos(const QPointF &p, ToDraw *item) const
 {
   const qreal objectScale = m_objectsNameRatio.value(item->elementId());
 
   QPointF res = p;
   res.setX(qMax(qreal(0), res.x()));
   res.setY(qMax(qreal(0), res.y()));
   res.setX(qMin(m_SvgRenderer.defaultSize().width() - item->boundingRect().width() * objectScale, res.x()));
   res.setY(qMin(m_SvgRenderer.defaultSize().height()- item->boundingRect().height() * objectScale, res.y()));
   return res;
 }
 
 QRectF PlayGround::backgroundRect() const
 {
   return m_SvgRenderer.boundsOnElement(QStringLiteral( "background" ));
 }
 
 void PlayGround::placeDraggedItem(const QPoint &pos)
 {
   QPointF itemPos = mapToScene(pos);
   const QSizeF &elementSize = m_dragItem->transform().mapRect(m_dragItem->unclippedRect()).size();
   itemPos -= QPointF(elementSize.width()/2, elementSize.height()/2);
 
   if (insideBackground(elementSize, itemPos))
   {
     m_dragItem->setBeingDragged(false);
     undoStack()->push(new ActionMove(m_dragItem, m_itemDraggedPos, m_nextZValue, scene()));
     m_nextZValue++;
   }
   else
   {
     undoStack()->push(new ActionRemove(m_dragItem, m_itemDraggedPos, scene()));
   }
 
   setCursor(QCursor());
   m_dragItem = nullptr;
 }
 
 void PlayGround::placeNewItem(const QPoint &pos)
 {
   const QSizeF elementSize = m_newItem->transform().mapRect(m_newItem->unclippedRect()).size();
   QPointF itemPos = mapToScene(pos);
   itemPos -= QPointF(elementSize.width()/2, elementSize.height()/2);
   if (insideBackground(elementSize, itemPos))
   {
     m_newItem->setBeingDragged(false);
     undoStack()->push(new ActionAdd(m_newItem, scene()));
   } else {
     m_newItem->deleteLater();
   }
   m_newItem = nullptr;
   setCursor(QCursor());
 }
 
 void PlayGround::recenterView()
 {
   // Cannot use sceneRect() because sometimes items get placed
   // with pos() outside rect (e.g. pizza theme)
   fitInView(QRect(QPoint(0,0), m_SvgRenderer.defaultSize()),
       m_lockAspect ? Qt::KeepAspectRatio : Qt::IgnoreAspectRatio);
 }
 
 QGraphicsScene *PlayGround::scene() const
 {
   return m_scenes[m_gameboardFile].scene;
 }
 
 QUndoStack *PlayGround::undoStack() const
 {
   return m_scenes[m_gameboardFile].undoStack;
 }
 
 void PlayGround::resizeEvent(QResizeEvent *)
 {
   recenterView();
 }
 
 void PlayGround::lockAspectRatio(bool lock)
 {
   if (m_lockAspect != lock)
   {
     m_lockAspect = lock;
     recenterView();
   }
 }
 
 bool PlayGround::isAspectRatioLocked() const
 {
   return m_lockAspect;
 }
 
 // Register the various playgrounds
 void PlayGround::registerPlayGrounds()
 {
   QSet<QString> list;
   const QStringList dirs = FileFactory::locateAll(QStringLiteral("pics"));
   for (const QString &dir : dirs)
   {
     const QStringList fileNames = QDir(dir).entryList(QStringList() << QStringLiteral("*.theme"));
     for (const QString &file : fileNames)
     {
         list << dir + QLatin1Char('/') + file;
     }
   }
 
   QMultiMap<QString, QPair<QString, QPixmap>> sortedByName;
 
   for(const QString &theme : std::as_const(list))
   {
     QFile layoutFile(theme);
     if (layoutFile.open(QIODevice::ReadOnly))
     {
       QDomDocument layoutDocument;
       if (layoutDocument.setContent(&layoutFile))
       {
         QString desktop = layoutDocument.documentElement().attribute(QStringLiteral( "desktop" ));
         KConfig c( FileFactory::locate( QLatin1String( "pics/" ) + desktop ) );
         KConfigGroup cg = c.group(QStringLiteral("KTuberlingTheme"));
         QString gameboard = layoutDocument.documentElement().attribute(QStringLiteral( "gameboard" ));
         QPixmap pixmap(200,100);
         pixmap.fill(Qt::transparent);
         playGroundPixmap(gameboard,pixmap);
         sortedByName.insert(cg.readEntry("Name"), QPair<QString, QPixmap>(theme, pixmap));
       }
     }
   }
 
   for(auto it = sortedByName.begin(); it != sortedByName.end(); ++it) {
     m_callbacks->registerGameboard(it.key(), it.value().first, it.value().second);
   }
 
 }
 
 void PlayGround::playGroundPixmap(const QString &playgroundName, QPixmap &pixmap)
 {
   m_SvgRenderer.load(FileFactory::locate(QLatin1String( "pics/" ) + playgroundName ));
   QPainter painter(&pixmap);
   m_SvgRenderer.render(&painter,QStringLiteral( "background" ));
 }
 
 // Load background and draggable objects masks
 bool PlayGround::loadPlayGround(const QString &gameboardFile)
 {
   QFile layoutFile(gameboardFile);
   if (!layoutFile.open(QIODevice::ReadOnly)) return false;
   QDomDocument layoutDocument;
   if (!layoutDocument.setContent(&layoutFile)) return false;
 
   const QDomElement playGroundElement = layoutDocument.documentElement();
 
   QString gameboardName = playGroundElement.attribute(QStringLiteral( "gameboard" ));
 
   QColor bgColor = QColor(playGroundElement.attribute(QStringLiteral( "bgcolor" ), QStringLiteral( "#fff" ) ) );
   if (!bgColor.isValid())
     bgColor = Qt::white;
 
   if (!m_SvgRenderer.load(FileFactory::locate( QLatin1String( "pics/" ) + gameboardName )))
     return false;
 
   const QDomNodeList objectsList = playGroundElement.elementsByTagName(QStringLiteral( "object" ));
   if (objectsList.count() < 1)
     return false;
 
   m_objectsNameSound.clear();
 
   // create scene data if needed
   if(!m_scenes.contains(gameboardFile))
   {
     SceneData &data = m_scenes[gameboardFile];
     data.scene = new QGraphicsScene();
     data.undoStack = new QUndoStack();
 
     QGraphicsSvgItem *background = new QGraphicsSvgItem();
     background->setPos(QPoint(0,0));
     background->setSharedRenderer(&m_SvgRenderer);
     background->setZValue(0);
     data.scene->addItem(background);
 
     m_undoGroup.addStack(data.undoStack);
   }
 
   for (int decoration = 0; decoration < objectsList.count(); decoration++)
   {
     const QDomElement objectElement = objectsList.item(decoration).toElement();
 
     const QString &objectName = objectElement.attribute(QStringLiteral( "name" ));
     if (m_SvgRenderer.elementExists(objectName))
     {
       m_objectsNameSound.insert(objectName, objectElement.attribute(QStringLiteral( "sound" )));
       m_objectsNameRatio.insert(objectName, objectElement.attribute(QStringLiteral( "scale" ), QStringLiteral( "1" )).toDouble());
     }
     else
     {
       qCWarning(KTUBERLING_LOG) << objectName << "does not exist. Check" << gameboardFile;
     }
   }
 
   setBackgroundBrush(bgColor);
   m_gameboardFile = gameboardFile;
   setScene(scene());
 
   recenterView();
 
   m_undoGroup.setActiveStack(undoStack());
 
   return true;
 }
 
 void PlayGround::setAllowOnlyDrag(bool allowOnlyDrag)
 {
   m_allowOnlyDrag = allowOnlyDrag;
 }
 
 QString PlayGround::currentGameboard() const
 {
   return m_gameboardFile;
 }
 
 // Load objects and lay them down on the editable area
 PlayGround::LoadError PlayGround::loadFrom(const QString &name)
 {
   QFile f(name);
   if (!f.open(QIODevice::ReadOnly))
       return OtherError;
 
   QDataStream in(&f);
   in.setVersion(QDataStream::Qt_4_5);
 
   bool scale = false;
   bool reopenInTextMode = false;
   QString magicText;
   in >> magicText;
   if ( QLatin1String( saveGameTextScaleTextMode ) == magicText) {
       scale = true;
       reopenInTextMode = true;
   } else if (QLatin1String( saveGameTextTextMode ) == magicText) {
       reopenInTextMode = true;
   } else if ( QLatin1String( saveGameText ) != magicText) {
       return OldFileVersionError;
   }
 
   if (reopenInTextMode) {
       f.close();
       if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
         return OtherError;
       in.setDevice(&f);
       in.setVersion(QDataStream::Qt_4_5);
       in >> magicText;
   }
 
   sceneRect();
 
   if (in.atEnd())
     return OtherError;
 
   QString board;
   in >> board;
 
   qreal xFactor = 1.0;
   qreal yFactor = 1.0;
   m_callbacks->changeGameboard(board);
 
   reset();
 
   if (scale) {
     QSize defaultSize = m_SvgRenderer.defaultSize();
     QSize currentSize = size();
     xFactor = (qreal)defaultSize.width() / (qreal)currentSize.width();
     yFactor = (qreal)defaultSize.height() / (qreal)currentSize.height();
   }
 
   while ( !in.atEnd() )
   {
     ToDraw *obj = new ToDraw;
     if (!obj->load(in))
     {
       delete obj;
       return OtherError;
     }
     obj->setSharedRenderer(&m_SvgRenderer);
     double objectScale = m_objectsNameRatio.value(obj->elementId());
     obj->setTransform(QTransform::fromScale(objectScale, objectScale));
     if (scale) { // Mimic old behavior
       QPointF storedPos = obj->pos();
       storedPos.setX(storedPos.x() * xFactor);
       storedPos.setY(storedPos.y() * yFactor);
       obj->setPos(storedPos);
     }
     scene()->addItem(obj);
     undoStack()->push(new ActionAdd(obj, scene()));
   }
   if (f.error() == QFile::NoError) return NoError;
   else return OtherError;
 }
 
 #include "moc_playground.cpp"
 
 /* kate: replace-tabs on; indent-width 2; */