File indexing completed on 2024-09-08 06:47:56

 /*
     SPDX-FileCopyrightText: 2007 Paolo Capriotti <p.capriotti@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "battlefieldview.h"
 
 #include <QMouseEvent>
 #include <QSizePolicy>
 
 #include "kbsrenderer.h"
 #include "sprite.h"
 #include "animator.h"
 #include "animation.h"
 #include "welcomescreen.h"
 #include "button.h"
 #include "delegate.h"
 
 BattleFieldView::BattleFieldView(QWidget* parent, KBSRenderer* renderer, const QString& bgID, int gridSize)
 : QGraphicsView(parent)
 , m_renderer(renderer)
 , m_factory(renderer)
 , m_bgID(bgID)
 , m_gridSize(gridSize)
 , m_impact(nullptr)
 , m_last_hit(nullptr)
 , m_drawGrid(true)
 , m_delegate(nullptr)
 {
     m_background_lower = new KGameRenderedItem(m_renderer, bgID + QLatin1String("-layer1"));
     m_background_lower->setOpacity(0.98);
     
     m_background = new KGameRenderedItem(m_renderer, bgID + QLatin1String("-layer2"));
     m_background->setOpacity(0.98);
     
     m_screen = new WelcomeScreen(font());
 
     QGraphicsScene *scene = new QGraphicsScene(this);
     scene->addItem(m_background_lower);
     scene->addItem(m_background);
     scene->addItem(m_screen);
     
     for (Sprites::iterator i = m_sprites.begin();
             i != m_sprites.end();
             ++i) {
         i.value() = nullptr;
     }
 
     for (int i = 0; i < 11; i++) {
         hlines[i] = new QGraphicsLineItem;
         vlines[i] = new QGraphicsLineItem;
 
         scene->addItem(hlines[i]);
         scene->addItem(vlines[i]);
 
         hlines[i]->stackBefore(m_background);
         vlines[i]->stackBefore(m_background);
     }
 
     setScene(scene);
     setMouseTracking(true);
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 }
 
 void BattleFieldView::toggleGrid(bool show)
 {
     if (m_drawGrid != show)
     {
         m_drawGrid = show;
         drawGrid();
     }
 }
 
 void BattleFieldView::drawGrid()
 {
     if (m_drawGrid)
     {
         int spacing = m_renderer->size().width();
         int width   = spacing * m_gridSize;
         int height  = spacing * m_gridSize;
 
         for (int i = 0; i < 11; i++) {
             hlines[i]->show();
             hlines[i]->setLine(0, i * spacing, width, i * spacing);
 
             vlines[i]->show();
             vlines[i]->setLine(i * spacing, 0, i * spacing, height);
         }
     }
     else
     {
         for (int i = 0; i < 11; i++) {
             hlines[i]->hide();
             vlines[i]->hide();
         }
     }
 }
 
 void BattleFieldView::refresh()
 {
     // Updates this widget.
     int x = pos().x();
     int y = pos().x();
     int w = m_renderer->size().width() * m_gridSize;
     int h = m_renderer->size().height() * m_gridSize;
 
     setSceneRect(0, 0, w, h);
     // Due the rounded nature of the view, it's necessary to set its
     // geometry to make sure it will show the entire grid.
     int fs = frameWidth();
     setGeometry(x, y, w + 2 * fs, h + 2 * fs); 
 
     // update welcome screen
     m_screen->setPos(0, 0);
     m_screen->resize(m_renderer->size() * m_gridSize);
 
     // Updates the backgrounds.
     m_background_lower->hide();
     m_background_lower->setRenderSize(m_renderer->size() * m_gridSize);
     m_background_lower->show();
 
     m_background->hide();
     m_background->setRenderSize(m_renderer->size() * m_gridSize);
     m_background->show();
 
     // Updates the grid.
     drawGrid();
  
     // update preview
     if (m_preview.sprite) {
         m_preview.sprite->refresh(m_renderer);
         m_preview.sprite->setPos(m_renderer->toReal(m_preview.pos));
     }
     
     // update sprites
     for (Sprites::const_iterator i = m_sprites.constBegin(); 
             i != m_sprites.constEnd();
             ++i) {
         i.value()->refresh(m_renderer);
         i.value()->setPos(m_renderer->toReal(i.key()));
     }
 }
 
 void BattleFieldView::setPreview(const QPoint & pos)
 {
     if (!m_delegate) {
         return;
     }
     Ship * ship = m_delegate->nextShip();
 
     if (!ship) {
         return;
     }
 
     loadPreviewSprite(ship);
     Coord coordinate = m_renderer->toLogical(pos);
 
     if (m_delegate->canAddShip(m_player, coordinate)) {
         m_preview.sprite->turnGreen();
     } else {
         m_preview.sprite->turnRed();
     }
 
     QPointF scenePos = mapToScene(pos);
     m_preview.pos = m_renderer->toLogical(scenePos);
     m_preview.sprite->setPos(m_renderer->toReal(m_preview.pos));
 }
 
 void BattleFieldView::loadPreviewSprite(Ship * ship)
 {
     if (m_preview.ship) {
         return;
     }
 
     m_preview.ship      = ship;
     m_preview.sprite    = m_factory.createShip(ship);
 
     m_preview.sprite->setOpacity(PREVIEW_OPACITY);
     scene()->addItem(m_preview.sprite);
 }
 void BattleFieldView::cancelPreview()
 {
     delete m_preview.sprite;
     m_preview.sprite = nullptr;
     m_preview.ship = nullptr;
 }
 
 void BattleFieldView::addSprite(const Coord& c, Sprite* sprite)
 {
     m_sprites.insert(c, sprite);
     sprite->setPos(m_renderer->toReal(c));
     scene()->addItem(sprite);
 }
 
 void BattleFieldView::add(Ship* ship)
 {
     Sprite* sprite = m_factory.createShip(ship);
     sprite->setZValue(BACKGROUND);
     addSprite(ship->position(), sprite);
     
     // fading preview in
     if (ship->alive()) {
         Animation* a = new FadeAnimation(sprite, PREVIEW_OPACITY, 1, 1000);
         Animator::instance()->add(a);
     }
 
     if (ship == m_preview.ship) {
         cancelPreview();
     }
     else if (!ship->alive()) {
         sprite->setZValue(BACKGROUND);
         Animation* a = new FadeAnimation(sprite, 0, 0.5, 1000);
         Animator::instance()->add(a);
     }
 }
 
 void BattleFieldView::sink(Ship* ship)
 {
     m_last_hit = nullptr;
     
     Coord p = ship->position();
     for (unsigned int i = 0; 
          i < ship->size(); 
          i++, p += ship->increment()) {
         const auto spritesOfPos = m_sprites.values(p);
         for (Sprite* s : spritesOfPos) {
             if (s->spriteKey().startsWith(QLatin1String("ship"))) {
                 s->setZValue(BACKGROUND);
                 s->setOpacity(0.5);
             }
             else if (s->spriteKey().startsWith(QLatin1String("hit"))) {
                 s->setSpriteKey(QStringLiteral("hit-end"));
             }
         }
     }
 }
 
 void BattleFieldView::hit(const Coord& c)
 {
     removeImpact();
     m_last_hit = m_factory.createHit();
     m_last_hit->setZValue(FOREGROUND);
     m_last_hit->setOpacity(1.0);
     addSprite(c, m_last_hit);
 }
 
 void BattleFieldView::miss(const Coord& c)
 {
     removeImpact();
     m_impact = m_factory.createImpact();
     m_impact->setZValue(FOREGROUND);
     m_impact->setOpacity(1.0);
     addSprite(c, m_impact);
 }
 
 void BattleFieldView::removeImpact() {
     if (m_impact) {
         m_impact->setSpriteKey(QStringLiteral("water"));
         m_impact->refresh(m_renderer);
         m_impact = nullptr;
     }
     if (m_last_hit) {
         m_last_hit->setSpriteKey(QStringLiteral("hit-after"));
         m_last_hit->refresh(m_renderer);
         m_last_hit = nullptr;
     }
 }
 
 void BattleFieldView::clear()
 {
     // fixes a crash when the ships can not be placed.
     Animator::instance()->stop();
     delete m_preview.sprite;
     m_preview.sprite = nullptr;
     m_preview.ship = nullptr;
     
     m_impact = nullptr;
     m_last_hit = nullptr;
 
     qDeleteAll(m_sprites);
     m_sprites.clear();
 }
 
 void BattleFieldView::mousePressEvent(QMouseEvent *ev)
 {
     Button *button = dynamic_cast<Button *>(itemAt(ev->pos()));
 
     if (m_screen->isVisible() && button)
     {
         m_screen->onMousePress(button);
     }
     else if (ev->button() == Qt::LeftButton && m_delegate)
     {
         Coord c = m_renderer->toLogical(ev->pos());
         m_delegate->action(m_player, c);
     }
     else if (ev->button() == Qt::RightButton && m_delegate)
     {
         m_delegate->changeDirection(m_player);
         setPreview(ev->pos());
     }
 }
 
 void BattleFieldView::mouseReleaseEvent(QMouseEvent *ev)
 {
     Button *button = dynamic_cast<Button *>(itemAt(ev->pos()));
 
     if (m_screen->isVisible() && button && ev->button() == Qt::LeftButton) {
         m_screen->onMouseRelease(button);
     }
 }
 
 void BattleFieldView::mouseMoveEvent(QMouseEvent *ev)
 {
     Button *button = dynamic_cast<Button *>(itemAt(ev->pos()));
 
     if (m_screen->isVisible() && button)
     {
         m_screen->onMouseMove(button);
     }
     else if (m_screen->isVisible() && !button)
     {
         m_screen->onMouseLeave();
     }
     else
     {
         cancelPreview();
         setPreview(ev->pos());
     }
 }
 
 void BattleFieldView::leaveEvent(QEvent *)
 {
     if (m_screen->isVisible()) {
         m_screen->onMouseLeave();
     } else {
         cancelPreview();
     }
 }
 
 WelcomeScreen* BattleFieldView::screen() const
 {
     return m_screen;
 }
 
 void BattleFieldView::setDelegate(Delegate *c)
 {
     m_delegate = c;
 }
 
 void BattleFieldView::setPlayer(Sea::Player player)
 {
     m_player = player;
 }
 
 const qreal BattleFieldView::PREVIEW_OPACITY = 0.7;