File indexing completed on 2023-09-24 08:14:02

 /*
     This file is part of the KDE games kwin4 program
     SPDX-FileCopyrightText: 2006 Martin Heni <kde@heni-online.de>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kwin4view.h"
 
 // own
 #include "displaygame.h"
 #include "displayintro.h"
 #include "kfourinline_debug.h"
 #include "reflectiongraphicsscene.h"
 #include "score.h"
 #include "spritenotify.h"
 // KDEGames
 #define USE_UNSTABLE_LIBKDEGAMESPRIVATE_API
 #include <libkdegamesprivate/kgame/kplayer.h>
 // Qt
 #include <QColor>
 #include <QElapsedTimer>
 #include <QEvent>
 // Std
 #include <cmath>
 
 // How many time measurements for average
 #define MEASUREMENT_LIST_SIZE 50
 // How many warnings until reflections are switched off
 #define WARNING_MAX_COUNT 5
 // How many milliseconds rounding error
 #define MEASUREMENT_ROUNDING_ERROR 5
 
 // Constructor for the view
 KWin4View::KWin4View(int updateTime, const QSize &size, ReflectionGraphicsScene *scene, ThemeManager *theme, QWidget *parent)
     : Themeable(QStringLiteral("theview"), theme)
     , QGraphicsView(scene, parent)
 {
     // Store attributes
     mScene = scene;
     mTheme = theme;
     mDefaultUpdateTime = updateTime;
     mSlowDownFactor = 1.0;
     mSlowCnt = 0;
     mReflectPhase = 0;
 
     // We do not need scrolling so switch it off
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setFrameStyle(QFrame::NoFrame);
     setCacheMode(QGraphicsView::CacheBackground);
     // setAlignment(Qt::AlignHCenter);
 
     // setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
     setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
     setOptimizationFlags(QGraphicsView::DontSavePainterState | QGraphicsView::DontAdjustForAntialiasing);
 
     viewport()->setMouseTracking(true);
     setMouseTracking(true);
 
     // Choose a background color
     scene->setBackgroundBrush(QColor(0, 0, 128));
 
     mTimer = new QTimer(this);
     connect(mTimer, &QTimer::timeout, this, &KWin4View::updateAndAdvance);
     mTimer->start(mDefaultUpdateTime);
 
     // Game status
     mIsRunning = false;
 
     // Queue
     mThemeQueue.clear();
     mThemeOffset.clear();
 
     // Set size and position of the view and the canvas:
     // they are resized once a level is loaded
     resize(size);
     scene->setSceneRect(0, 0, this->width(), this->height());
     adjustSize();
 
     // Interact with user
     setInteractive(true);
 
     // Scale theme
     mTheme->rescale(this->width(), QPoint(0, 0));
 
     // Start with the intro display
     mGameDisplay = nullptr;
     mIntroDisplay = nullptr;
 
     // Reflections
     mReflectionSprite = new QGraphicsPixmapItem();
     scene->addItem(mReflectionSprite);
     mReflectionSprite->setZValue(1000.0);
     mReflectionSprite->hide();
 
     // Debug
     mFrameSprite = new QGraphicsTextItem();
     scene->addItem(mFrameSprite);
     mFrameSprite->setPos(QPointF(0.0, 0.0));
     mFrameSprite->setZValue(1000.0);
     if (global_debug > 0)
         mFrameSprite->show();
     else
         mFrameSprite->hide();
 
     // Skip the intro?
     if (!global_skip_intro) {
         mIntroDisplay = new DisplayIntro(scene, mTheme, this);
         connect(mIntroDisplay, &DisplayIntro::signalQuickStart, this, &KWin4View::signalQuickStart);
         mIntroDisplay->start();
     }
 }
 
 // Destruct the view object
 KWin4View::~KWin4View()
 {
     delete mIntroDisplay;
     delete mGameDisplay;
     if (global_debug > 0)
         qCDebug(KFOURINLINE_LOG) << "TRACKING" << hasMouseTracking() << "and" << viewport()->hasMouseTracking();
     delete mFrameSprite;
     delete mReflectionSprite;
 }
 
 // Main themeable function. Called for any theme change.
 void KWin4View::changeTheme()
 {
     if (global_debug > 0)
         qCDebug(KFOURINLINE_LOG) << "CHANGE THEME IN VIEW ... resetting slow counter";
     mDrawTimes.clear();
     mSlowDownFactor = 1.0;
     mSlowCnt = 0;
     mTimer->setInterval(int(mDefaultUpdateTime * mSlowDownFactor));
 }
 
 // Advance and update canvas/scene
 void KWin4View::updateAndAdvance()
 {
     // Time measurement (maybe remove static at some point)
     static bool first = true;
     static QElapsedTimer time;
     int elapsed = time.elapsed();
     if (first) {
         elapsed = 0;
         first = false;
     }
     time.restart();
 
     // Time display
     mDrawTimes.append(elapsed);
     if (mDrawTimes.size() > MEASUREMENT_LIST_SIZE)
         mDrawTimes.removeFirst();
     double avg = 0.0;
     for (int i = 0; i < mDrawTimes.size(); i++)
         avg += mDrawTimes[i];
     avg /= mDrawTimes.size();
 
     // Set debug sprite
     if (global_debug > 0) {
         mFrameSprite->setPlainText(QStringLiteral("CurrentUpdate: %1 ms  AverageUpdate%2 ms  DefaultUpdate: %3*%4 ms")
                                        .arg(elapsed)
                                        .arg(int(avg))
                                        .arg(mDefaultUpdateTime)
                                        .arg(mSlowDownFactor));
     }
 
     // Dynamic update of the graphics advance and update speed
     if (mDrawTimes.size() == MEASUREMENT_LIST_SIZE && avg > mDefaultUpdateTime * mSlowDownFactor + MEASUREMENT_ROUNDING_ERROR) {
         mSlowCnt++;
         qCDebug(KFOURINLINE_LOG) << "Warning " << mSlowCnt << " avg=" << avg;
         mDrawTimes.clear();
         if (mSlowCnt > WARNING_MAX_COUNT) {
             mSlowDownFactor = double(MEASUREMENT_ROUNDING_ERROR + avg) / double(mDefaultUpdateTime);
             mSlowCnt = 0;
             mTimer->setInterval(int(mDefaultUpdateTime * mSlowDownFactor));
 
             qCDebug(KFOURINLINE_LOG) << "SLOW COMPUTER WARNING: Decreasing graphics update speed " << mDefaultUpdateTime * mSlowDownFactor
                                      << "ms. Maybe switch off reflections.";
         }
     }
 
     // Scene advance
     scene()->advance();
     // QGV takes care of updating dirty rects, no need to call update or the whole scene is dirtied and repainted
     // scene()->update();
 
     // ====================================================================================
     // Reflections need to be done in the view otherwise the update's go wrong
     if (mReflectionRect.width() > 0 && mReflectionRect.height() > 0) {
         // Draw reflection in steps to save processing power
         if (mReflectPhase == 0) {
             mReflectImage = QImage(mReflectionRect.width(), mReflectionRect.height(), QImage::Format_ARGB32);
             mReflectImage.fill(Qt::transparent);
             QPainter imagePainter(&mReflectImage);
             // imagePainter.fillRect(image.rect(),QBrush(Qt::red));
 
             // Turn on all optimizations
             imagePainter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform, false);
             imagePainter.setClipping(true);
             imagePainter.setWorldTransform(QTransform(1.0, 0.0, 0.0, -1.0, 0.0, mReflectImage.height()));
             QRect source = QRect(mReflectionRect.x(), mReflectionRect.y() - mReflectImage.height(), mReflectImage.width(), mReflectImage.height());
 
             bool vis = mReflectionSprite->isVisible();
             mReflectionSprite->hide();
             dynamic_cast<ReflectionGraphicsScene *>(scene())->setBackground(false);
             scene()->render(&imagePainter, mReflectImage.rect(), source, Qt::IgnoreAspectRatio);
             dynamic_cast<ReflectionGraphicsScene *>(scene())->setBackground(true);
             if (vis)
                 mReflectionSprite->show();
             mReflectPhase = 1;
         }
         // Draw reflection in steps to save processing power
         else if (mReflectPhase == 1) {
             // Semi transparent
             QPainter imagePainter(&mReflectImage);
             imagePainter.setTransform(QTransform());
             imagePainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
             imagePainter.drawImage(0, 0, mGradientImage);
             mReflectPhase = 2;
         }
         // Draw reflection in steps to save processing power
         else if (mReflectPhase == 2) {
             // Set to sprite
             QPixmap pm = QPixmap::fromImage(mReflectImage);
             mReflectionSprite->setPixmap(pm);
             mReflectionSprite->update();
             mReflectPhase = 0;
         }
     }
     // ====================================================================================
 }
 
 // Define the reflection
 void KWin4View::setReflection(int x, int y, int width, int height)
 {
     mReflectionRect = QRect(x, y, width, height);
 
     QPoint p1, p2;
     p2.setY(height);
     mGradient = QLinearGradient(p1, p2);
     mGradient.setColorAt(0, QColor(0, 0, 0, 100));
     mGradient.setColorAt(1, Qt::transparent);
 
     qCDebug(KFOURINLINE_LOG) << "Set reflection " << x << " " << y << " " << width << " " << height;
 
     mGradientImage = QImage(width, height, QImage::Format_ARGB32);
     mGradientImage.fill(Qt::transparent);
     QPainter p(&mGradientImage);
     p.fillRect(0, 0, width, height, mGradient);
     p.end();
 
     mReflectionSprite->setPos(x, y);
     if (width > 0 && height > 0) {
         mReflectionSprite->show();
     } else {
         mReflectionSprite->hide();
     }
 }
 
 // QGV drawItems function (for debug time measurements)
 void KWin4View::drawItems(QPainter *painter, int numItems, QGraphicsItem *items[], const QStyleOptionGraphicsItem options[])
 {
     QGraphicsView::drawItems(painter, numItems, items, options);
 }
 
 // Stop intro display and init game display
 void KWin4View::initGame(Score *scoreData)
 {
     qCDebug(KFOURINLINE_LOG) << "KWin4View::initGame";
 
     // For better performance disable mouse tracking now
     viewport()->setMouseTracking(false);
     setMouseTracking(false);
 
     delete mIntroDisplay;
     mIntroDisplay = nullptr;
     if (!mGameDisplay) {
         mGameDisplay = new DisplayGame(mScene, mTheme, this);
     }
     mGameDisplay->start();
 
     // Connect score and score sprite
     scoreData->setDisplay(mGameDisplay->score());
 
     mIsRunning = true;
 }
 
 // End the game
 void KWin4View::endGame()
 {
     mIsRunning = false;
     mGameDisplay->displayEnd();
 }
 
 // Slot called by the framework when the view is resized.
 void KWin4View::resizeEvent(QResizeEvent *e)
 {
     if (global_debug > 2)
         qCDebug(KFOURINLINE_LOG) << "RESIZE EVENT" << e->size() << "oldSize=" << e->oldSize();
 
     // Test to prevent double resizing
     // if (QWidget::testAttribute(Qt::WA_PendingResizeEvent))
     // {
     //   return;
     // }
 
     double diffW = double(e->oldSize().width() - e->size().width());
     double diffH = double(e->oldSize().height() - e->size().height());
     double delta = fabs(diffW) + fabs(diffH);
 
     // Adapt the canvas size to the window size
     if (scene()) {
         scene()->setSceneRect(0, 0, e->size().width(), e->size().height());
     }
     QSizeF size = QSizeF(e->size());
 
     // Rescale on minimum fitting aspect ratio either width or height limiting
     double width = 0.0;
     double aspect = size.width() / size.height();
     QPoint offset;
 
     // Scale width:
     // Ideal size would be: 'width'*'height'
     // Offset in width is (e->size().width()-width)/2, offset in height is zero
     if (aspect > mTheme->aspectRatio()) {
         width = e->size().height() * mTheme->aspectRatio();
         offset = QPoint(int((e->size().width() - width) / 2.0), 0);
     }
     // Scale height:
     // 'height' = width/mTheme->aspectRatio()
     // Ideal size would be: 'width'*'height':
     // Offset in height is (e->size().height()-width/mTheme->aspectRatio())/2, offset in width is zero
     else {
         width = e->size().width(); // Scale height
         offset = QPoint(0, int((e->size().height() - width / mTheme->aspectRatio()) / 2.0));
     }
 
     // Pixel rescale
     double oldScale = mTheme->getScale();
 
     // resetTransform();
     QTransform transform;
     if (width > oldScale) {
         transform.scale(double(width / oldScale), double(width / oldScale));
     }
     setTransform(transform);
 
     mThemeQueue.prepend(int(width));
     mThemeOffset.prepend(offset);
     if (global_debug > 2)
         qCDebug(KFOURINLINE_LOG) << "Quequed resize, aspect=" << aspect << "theme aspect=" << mTheme->aspectRatio();
 
     long queueDelay = 0;
     if (delta < 15)
         queueDelay = 750;
     else if (delta < 35)
         queueDelay = 500;
 
     QTimer::singleShot(queueDelay, this, &KWin4View::rescaleTheme);
 }
 
 // Rescale the theme (update theme SVG graphics) from the theme list
 void KWin4View::rescaleTheme()
 {
     if (mThemeQueue.size() == 0) {
         if (global_debug > 2)
             qCDebug(KFOURINLINE_LOG) << "***************** Swallowing rescale event ***********************";
         return;
     }
 
     QElapsedTimer t;
     t.start();
 
     resetTransform();
 
     int width = mThemeQueue.first();
     QPoint offset = mThemeOffset.first();
     if (global_debug > 2)
         qCDebug(KFOURINLINE_LOG) << "Theme queue size=" << mThemeQueue.size() << "Rescale width to" << width << " offset " << offset;
     mThemeQueue.clear();
     mThemeOffset.clear();
     mTheme->rescale(width, offset);
 
     if (global_debug > 2)
         qCDebug(KFOURINLINE_LOG) << "Time elapsed: " << t.elapsed() << "ms";
 }
 
 // This slot is called when a mouse key is pressed. As the mouse is used as
 // input for all players. It is called to generate a player move out of a mouse input, i.e.
 // it converts a QMouseEvent into a move for the game.
 void KWin4View::mouseInput(KGameIO *input, QDataStream &stream, QMouseEvent *mouse, bool *eatevent)
 {
     // Only react to mouse pressed not released
     if (mouse->type() != QEvent::MouseButtonPress)
         return;
     if (mouse->button() != Qt::LeftButton)
         return;
     if (!mIsRunning)
         return;
 
     // Our player
     KPlayer *player = input->player();
     if (!player->myTurn()) {
         // qCDebug(KFOURINLINE_LOG) <<" Kwin4View::TODO wrongPlayer";
         //  *eatevent=wrongPlayer(player,KGameIO::MouseIO);
         return;
     }
 
     // Calculate movement position from mouse position
     int x = -1;
     if (mGameDisplay)
         x = mGameDisplay->mapMouseToMove(mouse->pos());
     if (x < 0)
         return;
 
     // Create a game move (pl id and move coordinate)
     qint32 move = x;
     qint32 pl = player->userId();
     stream << pl << move;
     *eatevent = true;
 }
 
 // This slot is called when a key event is received. It then produces a
 // valid move for the game.
 // This is analogous to the mouse event only it is called when a key is
 // pressed.
 void KWin4View::keyInput(KGameIO *input, QDataStream &stream, QKeyEvent *key, bool *eatevent)
 {
     // Ignore non running
     if (!mIsRunning)
         return;
 
     // Ignore non key press
     if (key->type() != QEvent::KeyPress)
         return;
 
     // Check key code
     int code = key->key();
     if (code < Qt::Key_1 || code > Qt::Key_7)
         return;
 
     // Our player
     KPlayer *player = input->player();
     if (!player->myTurn()) {
         // qCDebug(KFOURINLINE_LOG) <<" Kwin4View::TODO wrongPlayer";
         // *eatevent=wrongPlayer(player,KGameIO::KeyIO);
         return;
     }
 
     // Create a valid game move (player id and movement position)
     qint32 move = code - Qt::Key_1;
     qint32 pl = player->userId();
     stream << pl << move;
     *eatevent = true;
 }
 
 // Displays a move on the game board.
 void KWin4View::displayMove(int x, int y, int color, int xarrow, int colorarrow, int no, bool animation)
 {
     mGameDisplay->displayArrow(xarrow, colorarrow);
     // animation only if no redo
     SpriteNotify *notify = mGameDisplay->displayPiece(x, y, color, no, animation);
     if (notify && animation) {
         QObject::disconnect(notify, &SpriteNotify::signalNotify, this, &KWin4View::moveDone);
         connect(notify, &SpriteNotify::signalNotify, this, &KWin4View::moveDone);
     }
     mGameDisplay->displayHint(0, 0, false);
 }
 
 // Display a star of the given sprite number
 void KWin4View::displayStar(int x, int y, int no)
 {
     mGameDisplay->displayStar(x, y, no);
 }
 
 // Display a hint on the board
 void KWin4View::displayHint(int x, int y)
 {
     mGameDisplay->displayHint(x, y, true);
 }
 
 // Slot called when a sprite animation move is done.
 void KWin4View::moveDone(QGraphicsItem * /*item*/, int mode)
 {
     Q_EMIT signalMoveDone(mode);
 }
 
 bool KWin4View::viewportEvent(QEvent *event)
 {
     if (mIntroDisplay)
         mIntroDisplay->viewEvent(event);
     return QGraphicsView::viewportEvent(event);
 }
 
 #include "moc_kwin4view.cpp"