[VDD] Defer heavy construction until after the tab paints (#7115)

* [VDD] Defer heavy construction until after the tab paints

* Use singleshot QTimer instead of member variable.

Took 27 minutes

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/game_graphics/board/arrow_item.cpp

@@ -4,12 +4,14 @@
 #include "../../client/settings/cache_settings.h"
 #include "../../game/player/player_actions.h"
 #include "../../game/player/player_logic.h"
+#include "../game_scene.h"
 #include "../player/player_target.h"
 #include "../z_values.h"
 #include "../zones/card_zone.h"
 #include "card_item.h"
 
 #include <QDebug>
+#include <QElapsedTimer>
 #include <QGraphicsScene>
 #include <QGraphicsSceneMouseEvent>
 #include <QPainter>
@@ -18,10 +20,27 @@
 #include <libcockatrice/protocol/pb/command_attach_card.pb.h>
 #include <libcockatrice/protocol/pb/command_create_arrow.pb.h>
 #include <libcockatrice/protocol/pb/command_delete_arrow.pb.h>
+#include <libcockatrice/settings/cards_display_settings.h>
 #include <libcockatrice/settings/interface_settings.h>
 #include <libcockatrice/utility/color.h>
 #include <libcockatrice/utility/zone_names.h>
 
+namespace
+{
+constexpr qreal kMinStrokeDurationMs = 200.0;
+constexpr qreal kMaxStrokeDurationMs = 450.0;
+constexpr qreal kMsPerPixel = 0.8;
+constexpr qreal kGlowFadeDurationMs = 120.0;
+constexpr qreal kSheenHalfWidth = 14.0;
+
+/// @brief Ease-out cubic, for a natural "slow in / slow out" reveal.
+qreal easeOutCubic(qreal t)
+{
+    const qreal inverse = 1.0 - t;
+    return 1.0 - inverse * inverse * inverse;
+}
+} // namespace
+
 ArrowItem::ArrowItem(QSharedPointer<const ArrowData> _data, ArrowTarget *_startItem, ArrowTarget *_targetItem)
     : data(std::move(_data)), startItem(_startItem), targetItem(_targetItem)
 {
@@ -47,6 +66,13 @@ ArrowItem::ArrowItem(QSharedPointer<const ArrowData> _data, ArrowTarget *_startI
     }
 }
 
+ArrowItem::~ArrowItem()
+{
+    if (auto *scene = qobject_cast<GameScene *>(this->scene())) {
+        scene->unregisterAnimationItem(this);
+    }
+}
+
 void ArrowItem::onTargetDestroyed()
 {
     emit requestDeletion(data->creatorId, data->id);
@@ -91,16 +117,21 @@ void ArrowItem::updatePath(const QPointF &endPoint)
     prepareGeometryChange();
     if (lineLength < 30) {
         path = QPainterPath();
+        bodyPath = QPainterPath();
+        headPath = QPainterPath();
+        shaftOutlinePath = QPainterPath();
+        centerLine = QPainterPath();
+        headBaseFraction = 1.0;
     } else {
         QPointF c(lineLength / 2, qTan(phi * M_PI / 180) * lineLength);
 
-        QPainterPath centerLine;
+        centerLine = QPainterPath();
         centerLine.moveTo(0, 0);
         centerLine.quadTo(c, QPointF(lineLength, 0));
 
-        double percentage = 1 - headLength / lineLength;
+        headBaseFraction = 1 - headLength / lineLength;
-        QPointF arrowBodyEndPoint = centerLine.pointAtPercent(percentage);
+        QPointF arrowBodyEndPoint = centerLine.pointAtPercent(headBaseFraction);
-        QLineF testLine(arrowBodyEndPoint, centerLine.pointAtPercent(percentage + 0.001));
+        QLineF testLine(arrowBodyEndPoint, centerLine.pointAtPercent(headBaseFraction + 0.001));
         qreal alpha = testLine.angle() - 90;
         QPointF endPoint1 =
             arrowBodyEndPoint + arrowWidth / 2 * QPointF(qCos(alpha * M_PI / 180), -qSin(alpha * M_PI / 180));
@@ -111,20 +142,89 @@ void ArrowItem::updatePath(const QPointF &endPoint)
         QPointF point2 =
             endPoint2 + (headWidth - arrowWidth) / 2 * QPointF(-qCos(alpha * M_PI / 180), qSin(alpha * M_PI / 180));
 
-        path = QPainterPath(-arrowWidth / 2 * QPointF(qCos((phi - 90) * M_PI / 180), qSin((phi - 90) * M_PI / 180)));
+        QPointF start1 = -arrowWidth / 2 * QPointF(qCos((phi - 90) * M_PI / 180), qSin((phi - 90) * M_PI / 180));
+        QPointF start2 = arrowWidth / 2 * QPointF(qCos((phi - 90) * M_PI / 180), qSin((phi - 90) * M_PI / 180));
+
+        path = QPainterPath(start1);
         path.quadTo(c, endPoint1);
         path.lineTo(point1);
         path.lineTo(QPointF(lineLength, 0));
         path.lineTo(point2);
         path.lineTo(endPoint2);
-        path.quadTo(c, arrowWidth / 2 * QPointF(qCos((phi - 90) * M_PI / 180), qSin((phi - 90) * M_PI / 180)));
+        path.quadTo(c, start2);
-        path.lineTo(-arrowWidth / 2 * QPointF(qCos((phi - 90) * M_PI / 180), qSin((phi - 90) * M_PI / 180)));
+        path.lineTo(start1);
+
+        bodyPath = QPainterPath(start1);
+        bodyPath.quadTo(c, endPoint1);
+        bodyPath.lineTo(endPoint2);
+        bodyPath.quadTo(c, start2);
+        bodyPath.lineTo(start1);
+
+        headPath = QPainterPath(endPoint1);
+        headPath.lineTo(point1);
+        headPath.lineTo(QPointF(lineLength, 0));
+        headPath.lineTo(point2);
+        headPath.lineTo(endPoint2);
+
+        shaftOutlinePath = QPainterPath(start1);
+        shaftOutlinePath.quadTo(c, endPoint1);
+        shaftOutlinePath.moveTo(endPoint2);
+        shaftOutlinePath.quadTo(c, start2);
+        shaftOutlinePath.lineTo(start1);
     }
 
     setPos(startPoint);
     setTransform(QTransform().rotate(-line.angle()));
 }
 
+void ArrowItem::startDrawAnimation()
+{
+    if (!SettingsCache::instance().cardsDisplay().getArrowDrawAnimation() || centerLine.isEmpty()) {
+        return;
+    }
+
+    strokeDurationMs = qBound(kMinStrokeDurationMs, centerLine.length() * kMsPerPixel, kMaxStrokeDurationMs);
+    glowFadeDurationMs = kGlowFadeDurationMs;
+    // The clock is started on the first animationEvent() tick so that t=0
+    // corresponds to the first rendered frame. Starting it here would count
+    // the time spent before the item's first paint (event-loop delays, bursts
+    // of arrows created together), making the arrow appear already partway
+    // drawn when it first shows up.
+    animationStarted = false;
+    drawProgress = 0.0;
+    glowAlpha = 1.0;
+    update();
+    if (auto *scene = qobject_cast<GameScene *>(this->scene())) {
+        scene->registerAnimationItem(this);
+    }
+}
+
+bool ArrowItem::animationEvent()
+{
+    if (!animationStarted) {
+        animationClock.start();
+        animationStarted = true;
+    }
+
+    const qint64 elapsed = animationClock.elapsed();
+    if (elapsed >= strokeDurationMs + glowFadeDurationMs) {
+        drawProgress = 1.0;
+        glowAlpha = 0.0;
+        update();
+        return false;
+    }
+
+    if (elapsed < strokeDurationMs) {
+        drawProgress = easeOutCubic(qBound<qreal>(0.0, elapsed / strokeDurationMs, 1.0));
+        glowAlpha = 1.0;
+    } else {
+        drawProgress = 1.0;
+        glowAlpha = 1.0 - (elapsed - strokeDurationMs) / glowFadeDurationMs;
+    }
+    update();
+    return true;
+}
+
 void ArrowItem::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/)
 {
     QColor paintColor(data->color);
@@ -133,8 +233,66 @@ void ArrowItem::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*opti
     } else {
         paintColor.setAlpha(150);
     }
+
+    painter->save();
+    const QPen outlinePen = painter->pen();
     painter->setBrush(paintColor);
+
+    const auto drawShaft = [this, painter, &outlinePen, paintColor]() {
+        painter->setPen(Qt::NoPen);
+        painter->drawPath(bodyPath);
+        painter->setPen(outlinePen);
+        painter->setBrush(Qt::NoBrush);
+        painter->drawPath(shaftOutlinePath);
+        painter->setBrush(paintColor);
+    };
+
+    if (drawProgress >= 1.0 || path.isEmpty()) {
         painter->drawPath(path);
+    } else if (drawProgress < headBaseFraction) {
+        // The reveal edge and the sheen share the same arc-length parameterization,
+        // so the stroke stays exactly in sync with the trailing sheen.
+        const qreal revealX = centerLine.pointAtPercent(drawProgress).x();
+        QPainterPath clip;
+        clip.addRect(QRectF(-glowExtent, path.boundingRect().top() - glowExtent, revealX + glowExtent,
+                            path.boundingRect().height() + 2 * glowExtent));
+        painter->setClipPath(clip);
+        drawShaft();
+    } else {
+        // Once the reveal reaches the head base, pop the whole head in with a fade
+        // instead of slicing the triangle into a growing stub.
+        drawShaft();
+        const qreal headFadeIn = (drawProgress - headBaseFraction) / (1.0 - headBaseFraction);
+        painter->setOpacity(headFadeIn);
+        painter->setPen(Qt::NoPen);
+        painter->drawPath(headPath);
+        painter->setPen(outlinePen);
+        painter->setBrush(Qt::NoBrush);
+        painter->drawPath(headPath);
+        painter->setOpacity(1.0);
+        painter->setBrush(paintColor);
+    }
+
+    if (glowAlpha > 0.0 && !centerLine.isEmpty()) {
+        // Sweep a bright band across the arrow. Clipping to the
+        // silhouette keeps it flat against the shaft so it reads as a light reflection.
+        const qreal anticipation = qMin<qreal>(1.0, drawProgress / 0.08);
+        const QPointF sweep = centerLine.pointAtPercent(qMin<qreal>(drawProgress, 1.0));
+        QLinearGradient sheen(sweep.x() - kSheenHalfWidth, 0.0, sweep.x() + kSheenHalfWidth, 0.0);
+        sheen.setColorAt(0.0, QColor(paintColor.red(), paintColor.green(), paintColor.blue(), 0));
+        sheen.setColorAt(0.5, QColor(255, 255, 255, 200));
+        sheen.setColorAt(1.0, QColor(paintColor.red(), paintColor.green(), paintColor.blue(), 0));
+        painter->save();
+        painter->setPen(Qt::NoPen);
+        painter->setClipPath(path);
+        painter->setBrush(sheen);
+        painter->setOpacity(glowAlpha * anticipation);
+        painter->drawRect(QRectF(sweep.x() - kSheenHalfWidth - glowExtent, path.boundingRect().top() - glowExtent,
+                                 (kSheenHalfWidth + glowExtent) * 2.0,
+                                 path.boundingRect().height() + glowExtent * 2.0));
+        painter->restore();
+    }
+    painter->restore();
 }
 
 void ArrowItem::mousePressEvent(QGraphicsSceneMouseEvent *event)

cockatrice/src/game_graphics/board/arrow_item.h

@@ -2,9 +2,12 @@
 #define ARROWITEM_H
 
 #include "../../game/board/arrow_data.h"
+#include "../animated_item.h"
 #include "arrow_target.h"
 
+#include <QElapsedTimer>
 #include <QGraphicsItem>
+#include <QPainterPath>
 #include <QPointer>
 #include <QSharedPointer>
 
@@ -12,7 +15,7 @@ class CardItem;
 class QGraphicsSceneMouseEvent;
 class PlayerLogic;
 
-class ArrowItem : public QObject, public QGraphicsItem
+class ArrowItem : public QObject, public QGraphicsItem, public IAnimatedItem
 {
     Q_OBJECT
     Q_INTERFACES(QGraphicsItem)
@@ -21,6 +24,19 @@ signals:
 
 private:
     QPainterPath path;
+    QPainterPath bodyPath;
+    QPainterPath headPath;
+    QPainterPath shaftOutlinePath;
+    QPainterPath centerLine;
+    qreal headBaseFraction = 1.0;
+    QElapsedTimer animationClock;
+    qreal strokeDurationMs = 0;
+    qreal glowFadeDurationMs = 0;
+    qreal drawProgress = 1.0;
+    qreal glowAlpha = 0.0;
+    bool animationStarted = false;
+
+    static constexpr qreal glowExtent = 12.0;
 
 protected:
     QSharedPointer<const ArrowData> data;
@@ -33,16 +49,19 @@ protected:
 
 public:
     ArrowItem(QSharedPointer<const ArrowData> _data, ArrowTarget *_startItem, ArrowTarget *_targetItem);
+    ~ArrowItem() override;
 
     void onTargetDestroyed();
     void delArrow();
     void updatePath();
     void updatePath(const QPointF &endPoint);
+    void startDrawAnimation();
+    bool animationEvent() override;
 
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
     [[nodiscard]] QRectF boundingRect() const override
     {
-        return path.boundingRect();
+        return path.boundingRect().adjusted(-glowExtent, -glowExtent, glowExtent, glowExtent);
     }
     [[nodiscard]] QPainterPath shape() const override
     {

cockatrice/src/game_graphics/game_scene.cpp

@@ -502,6 +502,7 @@ void GameScene::addArrow(QSharedPointer<ArrowData> data)
 
     auto *arrow = new ArrowItem(data, startCard, targetItem);
     addItem(arrow);
+    arrow->startDrawAnimation();
     arrowRegistry.insert(data, arrow);
     connect(arrow, &ArrowItem::requestDeletion, this, &GameScene::requestArrowDeletion);
 }

cockatrice/src/interface/widgets/settings_page/user_interface_settings_page.cpp

@@ -116,6 +116,10 @@ UserInterfaceSettingsPage::UserInterfaceSettingsPage()
     connect(&tapAnimationCheckBox, &QCheckBox::QT_STATE_CHANGED, &SettingsCache::instance().cardsDisplay(),
             &CardsDisplaySettings::setTapAnimation);
 
+    arrowDrawAnimationCheckBox.setChecked(SettingsCache::instance().cardsDisplay().getArrowDrawAnimation());
+    connect(&arrowDrawAnimationCheckBox, &QCheckBox::QT_STATE_CHANGED, &SettingsCache::instance().cardsDisplay(),
+            &CardsDisplaySettings::setArrowDrawAnimation);
+
     lifeCounterAnimationsCheckBox.setChecked(
         SettingsCache::instance().userInterface().getLifeCounterAnimationsEnabled());
     connect(&lifeCounterAnimationsCheckBox, &QCheckBox::QT_STATE_CHANGED, &SettingsCache::instance().userInterface(),
@@ -132,8 +136,9 @@ UserInterfaceSettingsPage::UserInterfaceSettingsPage()
     animationGrid->addWidget(&enableAllAnimationsButton, 0, 0);
     animationGrid->addWidget(&disableAllAnimationsButton, 0, 1);
     animationGrid->addWidget(&tapAnimationCheckBox, 1, 0);
-    animationGrid->addWidget(&lifeCounterAnimationsCheckBox, 2, 0);
+    animationGrid->addWidget(&arrowDrawAnimationCheckBox, 2, 0);
-    animationGrid->addWidget(&battlefieldFlashCheckBox, 3, 0);
+    animationGrid->addWidget(&lifeCounterAnimationsCheckBox, 3, 0);
+    animationGrid->addWidget(&battlefieldFlashCheckBox, 4, 0);
 
     animationGroupBox = new QGroupBox;
     animationGroupBox->setLayout(animationGrid);
@@ -287,6 +292,7 @@ void UserInterfaceSettingsPage::setNotificationEnabled(QT_STATE_CHANGED_T i)
 void UserInterfaceSettingsPage::enableAllAnimations()
 {
     tapAnimationCheckBox.setChecked(true);
+    arrowDrawAnimationCheckBox.setChecked(true);
     lifeCounterAnimationsCheckBox.setChecked(true);
     battlefieldFlashCheckBox.setChecked(true);
 }
@@ -294,6 +300,7 @@ void UserInterfaceSettingsPage::enableAllAnimations()
 void UserInterfaceSettingsPage::disableAllAnimations()
 {
     tapAnimationCheckBox.setChecked(false);
+    arrowDrawAnimationCheckBox.setChecked(false);
     lifeCounterAnimationsCheckBox.setChecked(false);
     battlefieldFlashCheckBox.setChecked(false);
 }
@@ -343,6 +350,7 @@ void UserInterfaceSettingsPage::retranslateUi()
     enableAllAnimationsButton.setText(tr("&Enable all animations"));
     disableAllAnimationsButton.setText(tr("&Disable all animations"));
     tapAnimationCheckBox.setText(tr("&Tap/untap animation"));
+    arrowDrawAnimationCheckBox.setText(tr("&Arrow draw animation"));
     lifeCounterAnimationsCheckBox.setText(tr("Life counter flash"));
     battlefieldFlashCheckBox.setText(tr("Battlefield flash on damage"));
     deckEditorGroupBox->setTitle(tr("Deck editor/storage settings"));

cockatrice/src/interface/widgets/settings_page/user_interface_settings_page.h

@@ -40,6 +40,7 @@ private:
     QPushButton enableAllAnimationsButton;
     QPushButton disableAllAnimationsButton;
     QCheckBox tapAnimationCheckBox;
+    QCheckBox arrowDrawAnimationCheckBox;
     QCheckBox lifeCounterAnimationsCheckBox;
     QCheckBox battlefieldFlashCheckBox;
     QCheckBox openDeckInNewTabCheckBox;

cockatrice/src/interface/widgets/tabs/visual_deck_editor/tab_deck_editor_visual.cpp

@@ -27,7 +27,6 @@
 #include <QTimer>
 #include <QTreeView>
 #include <QVBoxLayout>
-#include <libcockatrice/card/database/card_database_manager.h>
 #include <libcockatrice/models/deck_list/deck_list_model.h>
 #include <libcockatrice/protocol/pb/command_deck_upload.pb.h>
 #include <libcockatrice/protocol/pending_command.h>
@@ -67,9 +66,6 @@ void TabDeckEditorVisual::createCentralFrame()
     centralFrame = new QVBoxLayout;
     centralWidget->setLayout(centralFrame);
 
-    auto databaseModel = new CardDatabaseModel(CardDatabaseManager::getInstance(), true, this);
-    databaseModel->setObjectName("databaseModel");
-
     tabContainer = new TabDeckEditorVisualTabWidget(centralWidget, this, deckStateManager->getModel(), databaseModel);
 
     connect(tabContainer, &TabDeckEditorVisualTabWidget::cardChanged, this,

cockatrice/src/interface/widgets/tabs/visual_deck_editor/tab_deck_editor_visual_tab_widget.cpp

@@ -25,7 +25,8 @@ TabDeckEditorVisualTabWidget::TabDeckEditorVisualTabWidget(QWidget *parent,
     layout = new QVBoxLayout(this);
     setLayout(layout);
 
-    visualDeckView = new VisualDeckEditorWidget(this, deckModel, _deckEditor->deckDockWidget->getSelectionModel());
+    visualDeckView = new VisualDeckEditorWidget(this, deckModel, _deckEditor->deckDockWidget->getSelectionModel(),
+                                                _cardDatabaseModel);
     visualDeckView->setObjectName("visualDeckView");
     connect(visualDeckView, &VisualDeckEditorWidget::activeCardChanged, this,
             &TabDeckEditorVisualTabWidget::onCardChanged);

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_filter_toolbar_widget.cpp

@@ -82,17 +82,14 @@ VisualDatabaseDisplayFilterToolbarWidget::VisualDatabaseDisplayFilterToolbarWidg
 
 void VisualDatabaseDisplayFilterToolbarWidget::initialize()
 {
-    // create groupbox layouts
+    auto sortLayout = new QHBoxLayout(sortGroupBox);
-    auto sortLayout = new QHBoxLayout(this);
     sortLayout->setContentsMargins(0, 0, 0, 0);
     sortLayout->setSpacing(0);
-    sortGroupBox->setLayout(sortLayout);
     sortLayout->setAlignment(Qt::AlignLeft);
 
-    auto filterLayout = new QHBoxLayout(this);
+    auto filterLayout = new QHBoxLayout(filterGroupBox);
     filterLayout->setContentsMargins(0, 0, 0, 0);
     filterLayout->setSpacing(2);
-    filterGroupBox->setLayout(filterLayout);
     filterLayout->setAlignment(Qt::AlignLeft);
 
     // create settings widgets

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.cpp

@@ -16,6 +16,7 @@
 
 #include <QHeaderView>
 #include <QScrollBar>
+#include <QShowEvent>
 #include <QStyledItemDelegate>
 #include <libcockatrice/card/card_info_comparator.h>
 #include <libcockatrice/card/database/card_database.h>
@@ -140,9 +141,6 @@ void VisualDatabaseDisplayWidget::initialize()
 {
     databaseLoadIndicator->setVisible(false);
 
-    filterContainer->initialize();
-    filterContainer->setVisible(true);
-
     searchContainer->addWidget(colorFilterWidget);
     searchContainer->addWidget(clearFilterWidget);
     searchContainer->addWidget(searchEdit);
@@ -158,17 +156,43 @@ void VisualDatabaseDisplayWidget::initialize()
 
     mainLayout->addWidget(cardSizeWidget);
 
-    databaseDisplayModel->setFilterTree(filterModel->filterTree());
-
     connect(filterModel, &FilterTreeModel::layoutChanged, this, &VisualDatabaseDisplayWidget::onSearchModelChanged);
 
-    loadCardsTimer = new QTimer(this);
+    initializeFilters();
-    loadCardsTimer->setSingleShot(true); // Ensure it only fires once after the timeout
+}
 
-    connect(loadCardsTimer, &QTimer::timeout, this, [this]() { loadCurrentPage(); });
+void VisualDatabaseDisplayWidget::initializeFilters()
-    loadCardsTimer->start(5000);
+{
+    if (filtersInitialized || !isVisible() || CardDatabaseManager::getInstance()->getLoadStatus() != LoadStatus::Ok) {
+        return;
+    }
+
+    filtersInitialized = true;
+
+    // The filter toolbar builds its widgets by iterating the entire card database
+    // (per-set, per-main-type, per-sub-type and per-format buttons). Building it
+    // inside showEvent would block the tab switch, so keep it hidden and defer the
+    // build to the next event loop turn, letting the tab paint first. The toolbar
+    // then appears one event loop turn later, shifting the grid down by the toolbar
+    // height -- the intended tradeoff of an responsive tab switch.
+    filterContainer->setVisible(false);
+
+    QTimer::singleShot(0, this, [this] {
+        filterContainer->initialize();
+        filterContainer->setVisible(true);
+
+        databaseDisplayModel->setFilterTree(filterModel->filterTree());
+
+        QTimer::singleShot(5000, this, [this] { loadCurrentPage(); });
 
         retranslateUi();
+    });
+}
+
+void VisualDatabaseDisplayWidget::showEvent(QShowEvent *event)
+{
+    QWidget::showEvent(event);
+    initializeFilters();
 }
 
 void VisualDatabaseDisplayWidget::retranslateUi()
@@ -292,9 +316,17 @@ void VisualDatabaseDisplayWidget::loadCurrentPage()
 {
     // Ensure only the initial page is loaded
     if (currentPage == 0) {
-        // Only load the first page initially
+        if (!initialLoadScheduled) {
+            initialLoadScheduled = true;
             qCDebug(VisualDatabaseDisplayLog) << "Loading the first page";
+            // Defer the first page so the tab switch stays responsive. The card
+            // grid builds one event loop turn later. This also applies to
+            // search-driven reloads, which reset currentPage back to 0.
+            QTimer::singleShot(0, this, [this] {
+                initialLoadScheduled = false;
                 populateCards();
+            });
+        }
     } else if (nearEndOfPage()) {
         // If not the first page, just load the next page and append to the flow widget
         loadNextPage();

cockatrice/src/interface/widgets/visual_database_display/visual_database_display_widget.h

@@ -115,17 +115,20 @@ private:
     OverlapControlWidget *overlapControlWidget;
     CardSizeWidget *cardSizeWidget;
     QTimer *debounceTimer;
-    QTimer *loadCardsTimer;
 
     int debounceTime = 300; // in Ms
     int currentPage = 0;    // Current page index
     int cardsPerPage = 100; // Number of cards per page
+    bool filtersInitialized = false;
+    bool initialLoadScheduled = false;
 
+    void initializeFilters();
     void highlightAllSearchEdit();
     bool nearEndOfPage() const;
 
 protected:
     void resizeEvent(QResizeEvent *event) override;
+    void showEvent(QShowEvent *event) override;
 };
 
 #endif // VISUAL_DATABASE_DISPLAY_WIDGET_H

cockatrice/src/interface/widgets/visual_deck_editor/visual_deck_editor_widget.cpp

@@ -29,8 +29,10 @@
 
 VisualDeckEditorWidget::VisualDeckEditorWidget(QWidget *parent,
                                                DeckListModel *_deckListModel,
-                                               QItemSelectionModel *_selectionModel)
+                                               QItemSelectionModel *_selectionModel,
-    : QWidget(parent), deckListModel(_deckListModel), selectionModel(_selectionModel)
+                                               CardDatabaseModel *_cardDatabaseModel)
+    : QWidget(parent), deckListModel(_deckListModel), selectionModel(_selectionModel),
+      cardDatabaseModel(_cardDatabaseModel)
 {
     // The Main Widget and Main Layout, which contain a single Widget: The Scroll Area
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
@@ -94,7 +96,9 @@ void VisualDeckEditorWidget::initializeSearchBarAndCompleter()
     setFocusProxy(searchBar);
     setFocusPolicy(Qt::ClickFocus);
 
+    if (!cardDatabaseModel) {
         cardDatabaseModel = new CardDatabaseModel(CardDatabaseManager::getInstance(), false, this);
+    }
     cardDatabaseDisplayModel = new CardDatabaseDisplayModel(this);
     cardDatabaseDisplayModel->setSourceModel(cardDatabaseModel);
 

cockatrice/src/interface/widgets/visual_deck_editor/visual_deck_editor_widget.h

@@ -38,7 +38,10 @@ class VisualDeckEditorWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit VisualDeckEditorWidget(QWidget *parent, DeckListModel *deckListModel, QItemSelectionModel *selectionModel);
+    explicit VisualDeckEditorWidget(QWidget *parent,
+                                    DeckListModel *deckListModel,
+                                    QItemSelectionModel *selectionModel,
+                                    CardDatabaseModel *_cardDatabaseModel = nullptr);
     void retranslateUi();
     void updateCompactMode();
     void clearAllDisplayWidgets();

libcockatrice_card/libcockatrice/card/database/card_database_querier.cpp

@@ -12,6 +12,17 @@ CardDatabaseQuerier::CardDatabaseQuerier(QObject *_parent,
                                          const ICardPreferenceProvider *prefs)
     : QObject(_parent), db(_db), prefs(prefs)
 {
+    // Invalidate the cached count maps whenever the database contents change.
+    connect(db, &CardDatabase::cardAdded, this, &CardDatabaseQuerier::invalidateCaches);
+    connect(db, &CardDatabase::cardRemoved, this, &CardDatabaseQuerier::invalidateCaches);
+    connect(db, &CardDatabase::cardDatabaseReset, this, &CardDatabaseQuerier::invalidateCaches);
+}
+
+void CardDatabaseQuerier::invalidateCaches()
+{
+    mainCardTypeCountsCache.clear();
+    subCardTypeCountsCache.clear();
+    formatsCountCache.clear();
 }
 
 /**
@@ -304,29 +315,27 @@ QString CardDatabaseQuerier::getPreferredPrintingProviderId(const QString &cardN
 
 QStringList CardDatabaseQuerier::getAllMainCardTypes() const
 {
-    QSet<QString> types;
+    return getAllMainCardTypesWithCount().keys();
-    for (const auto &card : db->cards.values()) {
-        types.insert(card->getMainCardType());
-    }
-    return types.values();
 }
 
 QMap<QString, int> CardDatabaseQuerier::getAllMainCardTypesWithCount() const
 {
-    QMap<QString, int> typeCounts;
+    // An empty cache is always recomputed correctly: a database with no cards
-
+    // produces an empty map, so the cache is only ever empty when it needs a
+    // (trivially cheap) rebuild.
+    if (mainCardTypeCountsCache.isEmpty()) {
         for (const auto &card : db->cards.values()) {
             QString type = card->getMainCardType();
-        typeCounts[type]++;
+            mainCardTypeCountsCache[type]++;
+        }
     }
 
-    return typeCounts;
+    return mainCardTypeCountsCache;
 }
 
 QMap<QString, int> CardDatabaseQuerier::getAllSubCardTypesWithCount() const
 {
-    QMap<QString, int> typeCounts;
+    if (subCardTypeCountsCache.isEmpty()) {
-
         for (const auto &card : db->cards.values()) {
             QString type = card->getCardType();
 
@@ -336,12 +345,13 @@ QMap<QString, int> CardDatabaseQuerier::getAllSubCardTypesWithCount() const
                 QStringList subtypes = parts[1].split(" ", Qt::SkipEmptyParts);
 
                 for (const QString &subtype : subtypes) {
-                typeCounts[subtype]++;
+                    subCardTypeCountsCache[subtype]++;
+                }
             }
         }
     }
 
-    return typeCounts;
+    return subCardTypeCountsCache;
 }
 
 FormatRulesPtr CardDatabaseQuerier::getFormat(const QString &formatName) const
@@ -351,18 +361,18 @@ FormatRulesPtr CardDatabaseQuerier::getFormat(const QString &formatName) const
 
 QMap<QString, int> CardDatabaseQuerier::getAllFormatsWithCount() const
 {
-    QMap<QString, int> formatCounts;
+    if (formatsCountCache.isEmpty()) {
-
         for (const auto &card : db->cards.values()) {
             QStringList allProps = card->getProperties();
 
             for (const QString &prop : allProps) {
                 if (prop.startsWith("format-")) {
                     QString formatName = prop.mid(QStringLiteral("format-").size());
-                formatCounts[formatName]++;
+                    formatsCountCache[formatName]++;
+                }
             }
         }
     }
 
-    return formatCounts;
+    return formatsCountCache;
 }

libcockatrice_card/libcockatrice/card/database/card_database_querier.h

@@ -220,6 +220,16 @@ public:
 private:
     const CardDatabase *db;               //!< Card database used for all lookups.
     const ICardPreferenceProvider *prefs; //!< Preference provider for preferred printings.
+
+    // Count maps are expensive to compute (they iterate the whole database) and are
+    // queried every time a filter widget is built, so cache them and invalidate on
+    // any database mutation. Only the main thread reads or writes these.
+    mutable QMap<QString, int> mainCardTypeCountsCache;
+    mutable QMap<QString, int> subCardTypeCountsCache;
+    mutable QMap<QString, int> formatsCountCache;
+
+private slots:
+    void invalidateCaches();
 };
 
 #endif // COCKATRICE_CARD_DATABASE_QUERIER_H

libcockatrice_interfaces/libcockatrice/interfaces/interface_cards_display_settings_provider.h

@@ -15,6 +15,7 @@ public:
     [[nodiscard]] virtual bool getIncludeRebalancedCards() const = 0;
     [[nodiscard]] virtual bool getPrintingSelectorNavigationButtonsVisible() const = 0;
     [[nodiscard]] virtual bool getTapAnimation() const = 0;
+    [[nodiscard]] virtual bool getArrowDrawAnimation() const = 0;
     [[nodiscard]] virtual bool getAutoRotateSidewaysLayoutCards() const = 0;
     [[nodiscard]] virtual bool getScaleCards() const = 0;
     [[nodiscard]] virtual int getStackCardOverlapPercent() const = 0;

libcockatrice_models/libcockatrice/models/database/card_database_model.cpp

@@ -111,19 +111,50 @@ bool CardDatabaseModel::checkCardHasAtLeastOneEnabledSet(const CardInfoPtr &card
 
 void CardDatabaseModel::cardDatabaseEnabledSetsChanged()
 {
-    // remove all the cards no more present in at least one enabled set
+    // Build the new card list in a single pass.
+    QList<CardInfoPtr> newCardList;
+    newCardList.reserve(cardList.size());
     for (const CardInfoPtr &card : cardList) {
-        if (!checkCardHasAtLeastOneEnabledSet(card)) {
+        if (checkCardHasAtLeastOneEnabledSet(card)) {
-            cardRemoved(card);
+            newCardList.append(card);
+        }
+    }
+    for (const CardInfoPtr &card : db->getCardList()) {
+        if (!cardListSet.contains(card) && checkCardHasAtLeastOneEnabledSet(card)) {
+            newCardList.append(card);
         }
     }
 
-    // re-check all the card currently not shown, maybe their part of a newly-enabled set
+    if (newCardList == cardList) {
-    for (const CardInfoPtr &card : db->getCardList()) {
+        return;
-        if (!cardListSet.contains(card)) {
+    }
-            cardAdded(card);
+
+    // Rebuild the whole list inside a single model reset instead of emitting
+    // per-card insert/remove notifications. With tens of thousands of cards the
+    // per-card path is the dominant cost of constructing a CardDatabaseModel.
+    QSet<CardInfoPtr> oldCardListSet = cardListSet;
+    QSet<CardInfoPtr> newCardListSet(newCardList.begin(), newCardList.end());
+
+    beginResetModel();
+
+    // Disconnect cards that are no longer shown.
+    for (const CardInfoPtr &card : cardList) {
+        if (!newCardListSet.contains(card)) {
+            disconnect(card.data(), nullptr, this, nullptr);
         }
     }
+
+    cardList = newCardList;
+    cardListSet = newCardListSet;
+
+    // Connect cards that are now shown for the first time.
+    for (const CardInfoPtr &card : cardList) {
+        if (!oldCardListSet.contains(card)) {
+            connect(card.data(), &CardInfo::cardInfoChanged, this, &CardDatabaseModel::cardInfoChanged);
+        }
+    }
+
+    endResetModel();
 }
 
 void CardDatabaseModel::cardAdded(const CardInfoPtr &card)

libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.cpp

@@ -133,6 +133,22 @@ void Server_ProtocolHandler::sendProtocolItem(const RoomEvent &item)
 Response::ResponseCode Server_ProtocolHandler::processSessionCommandContainer(const CommandContainer &cont,
                                                                               ResponseContainer &rc)
 {
+    const auto isPreAuthSessionCommand = [](SessionCommand::SessionCommandType type) {
+        switch (type) {
+            case SessionCommand::PING:
+            case SessionCommand::LOGIN:
+            case SessionCommand::REGISTER:
+            case SessionCommand::ACTIVATE:
+            case SessionCommand::FORGOT_PASSWORD_REQUEST:
+            case SessionCommand::FORGOT_PASSWORD_RESET:
+            case SessionCommand::FORGOT_PASSWORD_CHALLENGE:
+            case SessionCommand::REQUEST_PASSWORD_SALT:
+                return true;
+            default:
+                return false;
+        }
+    };
+
     Response::ResponseCode finalResponseCode = Response::RespOk;
     for (int i = cont.session_command_size() - 1; i >= 0; --i) {
         Response::ResponseCode resp = Response::RespInvalidCommand;
@@ -141,7 +157,11 @@ Response::ResponseCode Server_ProtocolHandler::processSessionCommandContainer(co
         if (num != SessionCommand::PING) { // don't log ping commands
             logDebugMessage(getSafeDebugString(sc));
         }
-        switch ((SessionCommand::SessionCommandType)num) {
+        const auto commandType = static_cast<SessionCommand::SessionCommandType>(num);
+        if (authState == NotLoggedIn && !isPreAuthSessionCommand(commandType)) {
+            resp = Response::RespLoginNeeded;
+        } else {
+            switch (commandType) {
                 case SessionCommand::PING:
                     resp = cmdPing(sc.GetExtension(Command_Ping::ext), rc);
                     break;
@@ -169,6 +189,7 @@ Response::ResponseCode Server_ProtocolHandler::processSessionCommandContainer(co
                 default:
                     resp = processExtendedSessionCommand(num, sc, rc);
             }
+        }
         if (resp != Response::RespOk) {
             finalResponseCode = resp;
         }

libcockatrice_settings/libcockatrice/settings/cards_display_settings.cpp

@@ -50,6 +50,11 @@ bool CardsDisplaySettings::getTapAnimation() const
     return getValue("tapAnimation", QString(), QString(), true).toBool();
 }
 
+bool CardsDisplaySettings::getArrowDrawAnimation() const
+{
+    return getValue("arrowDrawAnimation", QString(), QString(), true).toBool();
+}
+
 bool CardsDisplaySettings::getAutoRotateSidewaysLayoutCards() const
 {
     return getValue("autoRotateSidewaysLayoutCards", QString(), QString(), true).toBool();
@@ -159,6 +164,11 @@ void CardsDisplaySettings::setTapAnimation(bool _tapAnimation)
     setValue(_tapAnimation, "tapAnimation");
 }
 
+void CardsDisplaySettings::setArrowDrawAnimation(bool _arrowDrawAnimation)
+{
+    setValue(_arrowDrawAnimation, "arrowDrawAnimation");
+}
+
 void CardsDisplaySettings::setAutoRotateSidewaysLayoutCards(bool _autoRotateSidewaysLayoutCards)
 {
     setValue(_autoRotateSidewaysLayoutCards, "autoRotateSidewaysLayoutCards");

libcockatrice_settings/libcockatrice/settings/cards_display_settings.h

@@ -20,6 +20,7 @@ public:
     [[nodiscard]] bool getIncludeRebalancedCards() const override;
     [[nodiscard]] bool getPrintingSelectorNavigationButtonsVisible() const override;
     [[nodiscard]] bool getTapAnimation() const override;
+    [[nodiscard]] bool getArrowDrawAnimation() const override;
     [[nodiscard]] bool getAutoRotateSidewaysLayoutCards() const override;
     [[nodiscard]] bool getScaleCards() const override;
     [[nodiscard]] int getStackCardOverlapPercent() const override;
@@ -40,6 +41,7 @@ public:
     void setIncludeRebalancedCards(bool _includeRebalancedCards);
     void setPrintingSelectorNavigationButtonsVisible(bool _navigationButtonsVisible);
     void setTapAnimation(bool _tapAnimation);
+    void setArrowDrawAnimation(bool _arrowDrawAnimation);
     void setAutoRotateSidewaysLayoutCards(bool _autoRotateSidewaysLayoutCards);
     void setCardScaling(bool _scaleCards);
     void setStackCardOverlapPercent(int _verticalCardOverlapPercent);

servatrice/src/serversocketinterface.cpp

@@ -896,6 +896,10 @@ Response::ResponseCode AbstractServerSocketInterface::cmdReplayGetCode(const Com
 Response::ResponseCode AbstractServerSocketInterface::cmdReplaySubmitCode(const Command_ReplaySubmitCode &cmd,
                                                                           ResponseContainer & /*rc*/)
 {
+    if (authState != PasswordRight) {
+        return Response::RespFunctionNotAllowed;
+    }
+
     // code is of the form <game-id>-<hash>
     QString code = QString::fromStdString(cmd.replay_code());
     QStringList split = code.split("-");

tests/settings/settings_defaults_test.cpp

@@ -476,6 +476,12 @@ TEST_F(SettingsDefaultsTest, CardsDisplay_SampleHandSize_Default)
     ASSERT_EQ(s.getSampleHandSize(), 7);
 }
 
+TEST_F(SettingsDefaultsTest, CardsDisplay_ArrowDrawAnimation_Default)
+{
+    CardsDisplaySettings s(settingsPath, nullptr);
+    ASSERT_EQ(s.getArrowDrawAnimation(), true);
+}
+
 // --- VisualDeckStorageSettings ---
 
 TEST_F(SettingsDefaultsTest, VisualDeckStorage_SortingOrder_Default)