Hide widgets instead of destroying, go back to signals, rename for consistency.

Took 13 minutes

Took 4 seconds

Took 26 minutes

Took 5 seconds

# Commit time for manual adjustment:
# Took 9 minutes

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_color_identity_filter_widget.cpp

@@ -6,7 +6,7 @@
 #include <QSet>
 
 DeckPreviewColorIdentityFilterWidget::DeckPreviewColorIdentityFilterWidget(VisualDeckStorageWidget *parent)
-    : QWidget(parent), layout(new QHBoxLayout(this)), visualDeckStorageWidget(parent)
+    : QWidget(parent), layout(new QHBoxLayout(this))
 {
     setLayout(layout);
     layout->setSpacing(5);
@@ -55,9 +55,9 @@ void DeckPreviewColorIdentityFilterWidget::retranslateUi()
 }
 
 /**
- * @brief Pushes the current filter state to the proxy model.
+ * @brief The colors that are currently toggled on.
  */
-void DeckPreviewColorIdentityFilterWidget::applyFilter()
+QSet<QChar> DeckPreviewColorIdentityFilterWidget::getActiveColors() const
 {
     QSet<QChar> activeColorSet;
     for (auto it = activeColors.constBegin(); it != activeColors.constEnd(); ++it) {
@@ -65,15 +65,13 @@ void DeckPreviewColorIdentityFilterWidget::applyFilter()
             activeColorSet.insert(it.key());
         }
     }
-
-    // The VDS owns the proxy model, which exists for the widget's whole lifetime.
-    visualDeckStorageWidget->proxyModel()->setColorFilter(filterMode, activeColorSet);
+    return activeColorSet;
 }
 
 void DeckPreviewColorIdentityFilterWidget::handleColorToggled(QChar color, bool active)
 {
     activeColors[color] = active;
-    applyFilter();
+    emit activeColorsChanged();
 }
 
 void DeckPreviewColorIdentityFilterWidget::updateFilterMode()
@@ -92,5 +90,5 @@ void DeckPreviewColorIdentityFilterWidget::updateFilterMode()
     }
 
     retranslateUi(); // Update the button text
-    applyFilter();
+    emit filterModeChanged(filterMode);
 }

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_color_identity_filter_widget.h

@@ -11,6 +11,7 @@
 #include <QHBoxLayout>
 #include <QMap>
 #include <QPushButton>
+#include <QSet>
 #include <QWidget>
 
 class VisualDeckStorageWidget;
@@ -23,18 +24,40 @@ public:
     explicit DeckPreviewColorIdentityFilterWidget(VisualDeckStorageWidget *parent);
     void retranslateUi();
 
+    /**
+     * @brief The currently active color identity filter mode.
+     */
+    [[nodiscard]] VisualDeckStorageSortFilterProxyModel::FilterMode getFilterMode() const
+    {
+        return filterMode;
+    }
+
+    /**
+     * @brief The colors that are currently toggled on.
+     */
+    [[nodiscard]] QSet<QChar> getActiveColors() const;
+
+signals:
+    /**
+     * Emitted when the set of active colors changed due to user interaction.
+     */
+    void activeColorsChanged();
+
+    /**
+     * Emitted when the user cycles the color identity filter mode.
+     * @param mode The new filter mode.
+     */
+    void filterModeChanged(VisualDeckStorageSortFilterProxyModel::FilterMode mode);
+
 private slots:
     void handleColorToggled(QChar color, bool active);
     void updateFilterMode();
 
 private:
-    void applyFilter();
-
     QHBoxLayout *layout;
     QPushButton *toggleButton;
     QMap<QChar, bool> activeColors;
     VisualDeckStorageSortFilterProxyModel::FilterMode filterMode = VisualDeckStorageSortFilterProxyModel::Includes;
-    VisualDeckStorageWidget *visualDeckStorageWidget; ///< The VDS owning the proxy model.
 };
 
 #endif // DECK_PREVIEW_COLOR_IDENTITY_FILTER_WIDGET_H

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_deck_tags_display_widget.cpp

@@ -52,12 +52,12 @@ void DeckPreviewDeckTagsDisplayWidget::refreshTags()
 
 void DeckPreviewDeckTagsDisplayWidget::setKnownTagsProvider(const std::function<QStringList()> &provider)
 {
-    knownTagsProvider_ = provider;
+    knownTagsProvider = provider;
 }
 
 void DeckPreviewDeckTagsDisplayWidget::setConversionPromptHandler(const std::function<bool()> &handler)
 {
-    conversionPromptHandler_ = handler;
+    conversionPromptHandler = handler;
 }
 
 /**
@@ -99,11 +99,11 @@ static QStringList findAllKnownTags()
 void DeckPreviewDeckTagsDisplayWidget::openTagEditDlg()
 {
     // The deck editor path has no conversion prompt; the VDS path registers one.
-    if (conversionPromptHandler_ && !conversionPromptHandler_()) {
+    if (conversionPromptHandler && !conversionPromptHandler()) {
         return;
     }
 
-    const QStringList knownTags = knownTagsProvider_ ? knownTagsProvider_() : findAllKnownTags();
+    const QStringList knownTags = knownTagsProvider ? knownTagsProvider() : findAllKnownTags();
     execTagDialog(knownTags);
 }
 

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_deck_tags_display_widget.h

@@ -18,8 +18,8 @@ class DeckPreviewDeckTagsDisplayWidget : public QWidget
 
     QStringList currentTags;
     FlowWidget *flowWidget;
-    std::function<QStringList()> knownTagsProvider_;
-    std::function<bool()> conversionPromptHandler_;
+    std::function<QStringList()> knownTagsProvider;
+    std::function<bool()> conversionPromptHandler;
 
 public:
     explicit DeckPreviewDeckTagsDisplayWidget(QWidget *_parent, const QStringList &_tags = {});

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.cpp

@@ -27,9 +27,9 @@
 
 DeckPreviewWidget::DeckPreviewWidget(QWidget *_parent,
                                      VisualDeckStorageWidget *_visualDeckStorageWidget,
-                                     VisualDeckStorageModel *model,
+                                     VisualDeckStorageModel *_model,
                                      const QString &_filePath)
-    : QWidget(_parent), visualDeckStorageWidget(_visualDeckStorageWidget), model_(model), filePath(_filePath)
+    : QWidget(_parent), visualDeckStorageWidget(_visualDeckStorageWidget), model(_model), filePath(_filePath)
 {
     layout = new QVBoxLayout(this);
     setLayout(layout);
@@ -83,7 +83,16 @@ DeckPreviewWidget::DeckPreviewWidget(QWidget *_parent,
     layout->addWidget(bannerCardLabel);
     layout->addWidget(bannerCardComboBox);
 
-    connect(model_, &QAbstractItemModel::dataChanged, this, &DeckPreviewWidget::syncFromModel);
+    // Only re-sync when this widget's own row changed. Without the row check, every
+    // finished deck load would trigger a full resync (card db lookup + combo rebuild)
+    // in every preview widget.
+    connect(model, &QAbstractItemModel::dataChanged, this,
+            [this](const QModelIndex &topLeft, const QModelIndex &bottomRight) {
+                const int r = row();
+                if (r >= topLeft.row() && r <= bottomRight.row()) {
+                    syncFromModel();
+                }
+            });
 
     retranslateUi();
     syncFromModel();
@@ -119,7 +128,7 @@ void DeckPreviewWidget::enterEvent(QEnterEvent *event)
  */
 int DeckPreviewWidget::row() const
 {
-    return model_->rowForFilePath(filePath);
+    return model->rowForFilePath(filePath);
 }
 
 /**
@@ -131,7 +140,7 @@ QString DeckPreviewWidget::getDisplayName() const
     if (r == -1) {
         return {};
     }
-    return model_->dataForRow(r).displayName;
+    return model->dataForRow(r).displayName;
 }
 
 /**
@@ -140,11 +149,11 @@ QString DeckPreviewWidget::getDisplayName() const
 void DeckPreviewWidget::reloadIfModified()
 {
     const int r = row();
-    if (r == -1 || !model_->dataForRow(r).loadSucceeded) {
+    if (r == -1 || !model->dataForRow(r).loadSucceeded) {
         return;
     }
 
-    model_->reloadIfModified(r);
+    model->reloadIfModified(r);
 }
 
 /**
@@ -157,7 +166,7 @@ void DeckPreviewWidget::syncFromModel()
         return;
     }
 
-    const DeckPreviewData &data = model_->dataForRow(r);
+    const DeckPreviewData &data = model->dataForRow(r);
     filePath = data.filePath;
 
     const CardRef bannerCardRef = data.deck.deckList.getBannerCard();
@@ -246,7 +255,7 @@ void DeckPreviewWidget::updateBannerCardComboBox(const QString &currentText)
 
     const int r = row();
     if (r != -1) {
-        const DeckList &deckList = model_->dataForRow(r).deck.deckList;
+        const DeckList &deckList = model->dataForRow(r).deck.deckList;
         const QList<const DecklistCardNode *> cardsInDeck = deckList.getCardNodes();
 
         for (auto currentCard : cardsInDeck) {
@@ -265,16 +274,16 @@ void DeckPreviewWidget::updateBannerCardComboBox(const QString &currentText)
 
     // This is *slightly* more performant than using addItem in a loop.
 
-    QStandardItemModel *model = new QStandardItemModel(pairList.size(), 1, bannerCardComboBox);
+    QStandardItemModel *comboModel = new QStandardItemModel(pairList.size(), 1, bannerCardComboBox);
 
     int row = 0;
     for (const auto &pair : pairList) {
         QStandardItem *item = new QStandardItem(pair.first);
         item->setData(QVariant::fromValue(pair), Qt::UserRole);
-        model->setItem(row++, 0, item);
+        comboModel->setItem(row++, 0, item);
     }
 
-    bannerCardComboBox->setModel(model);
+    bannerCardComboBox->setModel(comboModel);
 
     // Try to restore the previous selection by finding the currentText
     int restoredIndex = bannerCardComboBox->findText(currentText);
@@ -283,7 +292,7 @@ void DeckPreviewWidget::updateBannerCardComboBox(const QString &currentText)
     } else {
         // Add a placeholder "-" and set it as the current selection
         const QString currentBannerCardName =
-            r == -1 ? QString() : model_->dataForRow(r).deck.deckList.getBannerCard().name;
+            r == -1 ? QString() : model->dataForRow(r).deck.deckList.getBannerCard().name;
         int bannerIndex = bannerCardComboBox->findText(currentBannerCardName);
         if (bannerIndex != -1) {
             bannerCardComboBox->setCurrentIndex(bannerIndex);
@@ -306,7 +315,7 @@ void DeckPreviewWidget::setBannerCard(int /* changedIndex */)
     if (r == -1) {
         return;
     }
-    model_->setBannerCard(r, cardRef);
+    model->setBannerCard(r, cardRef);
     bannerCardDisplayWidget->setCard(CardDatabaseManager::query()->getCard(cardRef));
 }
 
@@ -330,7 +339,7 @@ void DeckPreviewWidget::setTags(const QStringList &tags)
 {
     const int r = row();
     if (r != -1) {
-        model_->setTags(r, tags);
+        model->setTags(r, tags);
     }
 }
 
@@ -343,7 +352,7 @@ QMenu *DeckPreviewWidget::createRightClickMenu()
 
     connect(menu->addAction(tr("Open in deck editor")), &QAction::triggered, this, [this, r] {
         if (r != -1) {
-            emit openDeckEditor(model_->deckForRow(r));
+            emit openDeckEditor(model->deckForRow(r));
         }
     });
 
@@ -360,22 +369,22 @@ QMenu *DeckPreviewWidget::createRightClickMenu()
 
     connect(saveToClipboardMenu->addAction(tr("Annotated")), &QAction::triggered, this, [this, r] {
         if (r != -1) {
-            DeckLoader::saveToClipboard(model_->dataForRow(r).deck.deckList, true, true);
+            DeckLoader::saveToClipboard(model->dataForRow(r).deck.deckList, true, true);
         }
     });
     connect(saveToClipboardMenu->addAction(tr("Annotated (No set info)")), &QAction::triggered, this, [this, r] {
         if (r != -1) {
-            DeckLoader::saveToClipboard(model_->dataForRow(r).deck.deckList, true, false);
+            DeckLoader::saveToClipboard(model->dataForRow(r).deck.deckList, true, false);
         }
     });
     connect(saveToClipboardMenu->addAction(tr("Not Annotated")), &QAction::triggered, this, [this, r] {
         if (r != -1) {
-            DeckLoader::saveToClipboard(model_->dataForRow(r).deck.deckList, false, true);
+            DeckLoader::saveToClipboard(model->dataForRow(r).deck.deckList, false, true);
         }
     });
     connect(saveToClipboardMenu->addAction(tr("Not Annotated (No set info)")), &QAction::triggered, this, [this, r] {
         if (r != -1) {
-            DeckLoader::saveToClipboard(model_->dataForRow(r).deck.deckList, false, false);
+            DeckLoader::saveToClipboard(model->dataForRow(r).deck.deckList, false, false);
         }
     });
 
@@ -418,7 +427,7 @@ void DeckPreviewWidget::actRenameDeck()
     }
 
     // read input
-    const QString oldName = model_->dataForRow(r).deckName;
+    const QString oldName = model->dataForRow(r).deckName;
 
     bool ok;
     QString newName = QInputDialog::getText(this, tr("Rename deck"), tr("New name:"), QLineEdit::Normal, oldName, &ok);
@@ -427,7 +436,7 @@ void DeckPreviewWidget::actRenameDeck()
     }
 
     // write change
-    model_->renameDeck(r, newName);
+    model->renameDeck(r, newName);
 
     // The banner card text updates via the model's dataChanged signal.
 }
@@ -450,7 +459,7 @@ void DeckPreviewWidget::actRenameFile()
     }
 
     // write change
-    if (!model_->renameFile(r, newName)) {
+    if (!model->renameFile(r, newName)) {
         QMessageBox::critical(this, tr("Error"), tr("Rename failed"));
     }
 
@@ -472,7 +481,7 @@ void DeckPreviewWidget::actDeleteFile()
     }
 
     // write change
-    if (!model_->deleteFile(r)) {
+    if (!model->deleteFile(r)) {
         QMessageBox::critical(this, tr("Error"), tr("Delete failed"));
     }
 
@@ -515,7 +524,7 @@ bool DeckPreviewWidget::promptFileConversionIfRequired()
             return false;
         }
 
-        model_->convertToCockatriceFormat(row());
+        model->convertToCockatriceFormat(row());
         return true;
     }
 
@@ -534,7 +543,7 @@ bool DeckPreviewWidget::promptFileConversionIfRequired()
         return false;
     }
 
-    model_->convertToCockatriceFormat(row());
+    model->convertToCockatriceFormat(row());
 
     if (conversionDialog.dontAskAgain()) {
         SettingsCache::instance().visualDeckStorage().setVisualDeckStoragePromptForConversion(false);

cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.h

@@ -32,7 +32,7 @@ class DeckPreviewWidget final : public QWidget
 public:
     explicit DeckPreviewWidget(QWidget *parent,
                                VisualDeckStorageWidget *_visualDeckStorageWidget,
-                               VisualDeckStorageModel *model,
+                               VisualDeckStorageModel *_model,
                                const QString &_filePath);
     void retranslateUi();
 
@@ -83,7 +83,7 @@ private:
     void actDeleteFile();
 
     VisualDeckStorageWidget *visualDeckStorageWidget;
-    VisualDeckStorageModel *model_;
+    VisualDeckStorageModel *model;
     QString filePath;
     QVBoxLayout *layout;
     ColorIdentityWidget *colorIdentityWidget;

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_folder_display_widget.cpp

@@ -9,6 +9,7 @@
 #include "visual_deck_storage_sort_filter_proxy_model.h"
 #include "visual_deck_storage_widget.h"
 
+#include <QElapsedTimer>
 #include <QSet>
 #include <QTimer>
 #include <QVBoxLayout>
@@ -59,55 +60,103 @@ VisualDeckStorageFolderDisplayWidget::VisualDeckStorageFolderDisplayWidget(
     reconcileTimer->setInterval(150);
     connect(reconcileTimer, &QTimer::timeout, this, &VisualDeckStorageFolderDisplayWidget::reconcile);
 
-    reconcile();
+    // Building the whole folder subtree synchronously here would stall the ui thread on large
+    // collections, so the first reconcile runs as a chunked pass on later event loop turns.
+    scheduleReconcile();
 }
 
 void VisualDeckStorageFolderDisplayWidget::scheduleReconcile()
 {
+    if (deckPassActive) {
+        // The active pass may be scanning stale model state, so restart it from a clean
+        // slate once the current chunk yields.
+        deckPassRestartRequested = true;
+        return;
+    }
     reconcileTimer->start();
 }
 
 /**
- * @brief Re-reads the proxy and rebuilds the deck previews and subfolder widgets to match.
+ * @brief Starts a new chunked scan of the source model, yielding to the event loop between chunks.
  */
 void VisualDeckStorageFolderDisplayWidget::reconcile()
 {
-    reconcileDecks();
-    createSubFolderWidgets();
-    refreshVisibility();
+    beginDeckPass();
 }
 
-/**
- * @brief Reconciles the deck preview widgets in the flow layout with the accepted proxy rows.
- *
- * Decks are keyed by file path so that already-created preview widgets are reused
- * (their banner combo box, tag editor state, etc. is preserved) whenever possible.
- */
-void VisualDeckStorageFolderDisplayWidget::reconcileDecks()
+void VisualDeckStorageFolderDisplayWidget::beginDeckPass()
+{
+    deckPassActive = true;
+    deckPassRestartRequested = false;
+    deckPassRow = 0;
+    visibleDeckCount = 0;
+    deckPassPresentPaths.clear();
+
+    continueDeckPass();
+}
+
+void VisualDeckStorageFolderDisplayWidget::continueDeckPass()
+{
+    if (!deckPassActive) {
+        return;
+    }
+
+    QElapsedTimer passTimer;
+    passTimer.start();
+
+    auto *proxy = visualDeckStorageWidget->proxyModel();
+    auto *model = visualDeckStorageWidget->model();
+    const int sourceRowCount = model->rowCount();
+
+    // Scan rows of this folder, creating missing previews, until the time budget for this
+    // event loop turn runs out. The rest continues on the next turn.
+    while (deckPassRow < sourceRowCount) {
+        const int row = deckPassRow++;
+        const DeckPreviewData &data = model->dataForRow(row);
+        if (showFolders && data.folderPath != folderPath) {
+            continue;
+        }
+        deckPassPresentPaths.insert(data.filePath);
+
+        DeckPreviewWidget *deckPreviewWidget = deckWidgets.value(data.filePath, nullptr);
+        if (!deckPreviewWidget) {
+            deckPreviewWidget = createDeckPreviewWidget(data.filePath);
+        }
+
+        const bool accepted = proxy->mapFromSource(model->index(row, 0)).isValid();
+        if (accepted == deckPreviewWidget->isHidden()) {
+            deckPreviewWidget->setVisible(accepted);
+        }
+        if (accepted) {
+            ++visibleDeckCount;
+        }
+
+        if (passTimer.elapsed() >= DECK_PASS_TIME_BUDGET_MS) {
+            break;
+        }
+    }
+
+    if (deckPassRestartRequested) {
+        beginDeckPass();
+        return;
+    }
+
+    if (deckPassRow < sourceRowCount) {
+        QMetaObject::invokeMethod(this, &VisualDeckStorageFolderDisplayWidget::continueDeckPass, Qt::QueuedConnection);
+        return;
+    }
+
+    finishDeckPass();
+}
+
+void VisualDeckStorageFolderDisplayWidget::finishDeckPass()
 {
     auto *proxy = visualDeckStorageWidget->proxyModel();
     auto *model = visualDeckStorageWidget->model();
 
-    // Collect the file paths this folder should display, in proxy (sorted) order.
-    QStringList desiredOrder;
-    for (int proxyRow = 0; proxyRow < proxy->rowCount(); ++proxyRow) {
-        const QModelIndex sourceIndex = proxy->mapToSource(proxy->index(proxyRow, 0));
-        if (!sourceIndex.isValid()) {
-            continue;
-        }
-
-        const DeckPreviewData &data = model->dataForRow(sourceIndex.row());
-        if (showFolders && data.folderPath != folderPath) {
-            continue;
-        }
-        desiredOrder.append(data.filePath);
-    }
-
-    const QSet<QString> desiredSet(desiredOrder.cbegin(), desiredOrder.cend());
-
-    // Drop previews of decks that no longer match.
+    // Drop previews of decks that no longer exist in the source model.
     for (auto it = deckWidgets.begin(); it != deckWidgets.end();) {
-        if (!desiredSet.contains(it.key())) {
+        if (!deckPassPresentPaths.contains(it.key())) {
             flowWidget->removeWidget(it.value());
             it.value()->deleteLater();
             it = deckWidgets.erase(it);
@@ -116,37 +165,69 @@ void VisualDeckStorageFolderDisplayWidget::reconcileDecks()
         }
     }
 
-    // Create or reuse the preview widgets in the desired order.
-    QList<DeckPreviewWidget *> orderedWidgets;
-    orderedWidgets.reserve(desiredOrder.size());
-    for (const QString &filePath : desiredOrder) {
-        DeckPreviewWidget *deckPreviewWidget = deckWidgets.value(filePath, nullptr);
-        if (!deckPreviewWidget) {
-            deckPreviewWidget = new DeckPreviewWidget(flowWidget, visualDeckStorageWidget, model, filePath);
-            connect(deckPreviewWidget, &DeckPreviewWidget::deckLoadRequested, visualDeckStorageWidget,
-                    &VisualDeckStorageWidget::deckLoadRequested);
-            connect(deckPreviewWidget, &DeckPreviewWidget::openDeckEditor, visualDeckStorageWidget,
-                    &VisualDeckStorageWidget::openDeckEditor);
-            connect(visualDeckStorageWidget->settings(), &VisualDeckStorageQuickSettingsWidget::cardSizeChanged,
-                    deckPreviewWidget->bannerCardDisplayWidget, &CardInfoPictureWidget::setScaleFactor);
-            deckPreviewWidget->bannerCardDisplayWidget->setScaleFactor(
-                visualDeckStorageWidget->settings()->getCardSize());
-            deckWidgets.insert(filePath, deckPreviewWidget);
+    // Order the flow layout like the proxy sorts its rows.
+    QStringList orderedFilePaths;
+    orderedFilePaths.reserve(proxy->rowCount());
+    for (int proxyRow = 0; proxyRow < proxy->rowCount(); ++proxyRow) {
+        const QModelIndex sourceIndex = proxy->mapToSource(proxy->index(proxyRow, 0));
+        if (!sourceIndex.isValid()) {
+            continue;
+        }
+        const QString &filePath = model->dataForRow(sourceIndex.row()).filePath;
+        if (deckWidgets.contains(filePath)) {
+            orderedFilePaths.append(filePath);
+        }
+    }
+    // Hidden previews are appended so they remain part of the layout and take their
+    // sorted place once a filter lets them through again.
+    QSet<QString> orderedSet(orderedFilePaths.cbegin(), orderedFilePaths.cend());
+    for (auto it = deckWidgets.constBegin(); it != deckWidgets.constEnd(); ++it) {
+        if (!orderedSet.contains(it.key())) {
+            orderedSet.insert(it.key());
+            orderedFilePaths.append(it.key());
         }
-        orderedWidgets.append(deckPreviewWidget);
     }
 
     // Re-add all widgets so the flow layout order matches the proxy order. Skipped when the
     // order is unchanged so that data-only updates don't invalidate the flow layout.
-    if (desiredOrder != lastOrderedFilePaths) {
-        for (DeckPreviewWidget *deckPreviewWidget : orderedWidgets) {
-            flowWidget->removeWidget(deckPreviewWidget);
+    if (orderedFilePaths != lastOrderedFilePaths) {
+        for (const QString &filePath : orderedFilePaths) {
+            flowWidget->removeWidget(deckWidgets.value(filePath));
         }
-        for (DeckPreviewWidget *deckPreviewWidget : orderedWidgets) {
-            flowWidget->addWidget(deckPreviewWidget);
+        for (const QString &filePath : orderedFilePaths) {
+            flowWidget->addWidget(deckWidgets.value(filePath));
         }
-        lastOrderedFilePaths = desiredOrder;
+        lastOrderedFilePaths = orderedFilePaths;
     }
+
+    createSubFolderWidgets();
+
+    // Mark completion before evaluating visibility so this pass's own numbers decide whether
+    // the folder has content. The flag only guards evaluations made *during* a build.
+    deckPassActive = false;
+    initialPassCompleted = true;
+
+    refreshVisibility();
+}
+
+/**
+ * @brief Creates a deck preview widget and wires it up to the storage widget.
+ *
+ * @param filePath The absolute path of the deck file to preview.
+ */
+DeckPreviewWidget *VisualDeckStorageFolderDisplayWidget::createDeckPreviewWidget(const QString &filePath)
+{
+    auto *deckPreviewWidget =
+        new DeckPreviewWidget(flowWidget, visualDeckStorageWidget, visualDeckStorageWidget->model(), filePath);
+    connect(deckPreviewWidget, &DeckPreviewWidget::deckLoadRequested, visualDeckStorageWidget,
+            &VisualDeckStorageWidget::deckLoadRequested);
+    connect(deckPreviewWidget, &DeckPreviewWidget::openDeckEditor, visualDeckStorageWidget,
+            &VisualDeckStorageWidget::openDeckEditor);
+    connect(visualDeckStorageWidget->settings(), &VisualDeckStorageQuickSettingsWidget::cardSizeChanged,
+            deckPreviewWidget->bannerCardDisplayWidget, &CardInfoPictureWidget::setScaleFactor);
+    deckPreviewWidget->bannerCardDisplayWidget->setScaleFactor(visualDeckStorageWidget->settings()->getCardSize());
+    deckWidgets.insert(filePath, deckPreviewWidget);
+    return deckPreviewWidget;
 }
 
 /**
@@ -200,7 +281,7 @@ void VisualDeckStorageFolderDisplayWidget::updateShowFolders(bool enabled)
         subFolderWidgets.clear();
     }
 
-    reconcile();
+    scheduleReconcile();
 }
 
 /**
@@ -218,10 +299,13 @@ void VisualDeckStorageFolderDisplayWidget::refreshVisibility()
 
 /**
  * @brief Whether this folder shows any deck previews or has any visible subfolder.
+ *
+ * While the first pass is still building, the folder counts as having content so it
+ * doesn't flicker or hide prematurely before its previews have been created.
  */
 bool VisualDeckStorageFolderDisplayWidget::hasContent() const
 {
-    if (!deckWidgets.isEmpty()) {
+    if (!initialPassCompleted || visibleDeckCount > 0) {
         return true;
     }
 

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_folder_display_widget.h

@@ -3,17 +3,20 @@
  * @ingroup VisualDeckStorageWidgets
  * @brief Renders the decks of one folder of the Visual Deck Storage.
  *
- * This is a pure view: it reads the accepted rows of the
- * VisualDeckStorageSortFilterProxyModel whose folder matches this widget's
- * folder path, and keeps a set of child DeckPreviewWidgets in sync with those
- * rows. Subfolders are shown as nested VisualDeckStorageFolderDisplayWidgets
- * when the "show folders" setting is enabled.
+ * This is a pure view: it keeps one persistent DeckPreviewWidget alive per deck
+ * in its folder, and shows or hides those widgets according to the accepted rows
+ * of the VisualDeckStorageSortFilterProxyModel. Subfolders are shown as nested
+ * VisualDeckStorageFolderDisplayWidgets when the "show folders" setting is enabled.
+ *
+ * Reconciling runs as a time-budgeted chunked pass that yields to the event loop
+ * between chunks, so scanning a large collection never stalls the ui thread.
  */
 
 #ifndef VISUAL_DECK_STORAGE_FOLDER_DISPLAY_WIDGET_H
 #define VISUAL_DECK_STORAGE_FOLDER_DISPLAY_WIDGET_H
 
 #include <QHash>
+#include <QSet>
 #include <QString>
 #include <QWidget>
 
@@ -36,8 +39,8 @@ public:
 
 public slots:
     /**
-     * @brief Re-reads the proxy and rebuilds the deck previews and subfolder
-     * widgets to match.
+     * @brief Starts a new chunked reconcile pass that re-reads the proxy and rebuilds
+     * the deck previews and subfolder widgets to match.
      */
     void reconcile();
 
@@ -56,14 +59,26 @@ signals:
     void contentVisibilityChanged();
 
 private:
-    void reconcileDecks();
+    void beginDeckPass();
+    void continueDeckPass();
+    void finishDeckPass();
+    [[nodiscard]] DeckPreviewWidget *createDeckPreviewWidget(const QString &filePath);
     void createSubFolderWidgets();
     void refreshVisibility();
     [[nodiscard]] bool hasContent() const;
     [[nodiscard]] QStringList childFolderPaths() const;
 
+    /**
+     * @brief The maximum time in milliseconds spent creating deck previews per event loop turn.
+     *
+     * Creating all previews of a large folder at once blocks the ui thread for hundreds of
+     * milliseconds, so the pass is split into chunks that yield to the event loop instead.
+     */
+    static constexpr int DECK_PASS_TIME_BUDGET_MS = 20;
+
     bool showFolders;
-    QString folderPath; ///< Path relative to the deck folder; empty for the root folder.
+    QString folderPath;       ///< Path relative to the deck folder, empty for the root folder.
+    int visibleDeckCount = 0; ///< The number of this folder's deck previews not filtered out.
     QVBoxLayout *layout;
     QWidget *container;
     QVBoxLayout *containerLayout;
@@ -74,6 +89,16 @@ private:
     QHash<QString, VisualDeckStorageFolderDisplayWidget *> subFolderWidgets; ///< Folder path -> subfolder widget.
     QTimer *reconcileTimer = nullptr;                                        ///< Coalesces proxy change bursts.
     QStringList lastOrderedFilePaths; ///< The deck order last applied to the flow layout.
+
+    /// Whether a chunked reconcile pass is currently running.
+    bool deckPassActive = false;
+    /// Set when the model changes mid-pass. Discards progress and restarts the scan once
+    /// the current chunk finishes so the pass always converges on the latest model state.
+    bool deckPassRestartRequested = false;
+    /// Whether the first reconcile pass has run to completion at least once.
+    bool initialPassCompleted = false;
+    int deckPassRow = 0;                ///< Next source row to scan in the active pass.
+    QSet<QString> deckPassPresentPaths; ///< File paths seen so far in the active pass.
 };
 
 #endif // VISUAL_DECK_STORAGE_FOLDER_DISPLAY_WIDGET_H

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_search_widget.cpp

@@ -2,7 +2,6 @@
 
 #include "../../../filters/syntax_help.h"
 #include "../../pixel_map_generator.h"
-#include "visual_deck_storage_widget.h"
 
 #include <QAction>
 #include <QTimer>
@@ -13,9 +12,9 @@
  * Provides a search bar that allows users to search decks by filename or search
  * expression, with a debounced timer to trigger the search after the user stops typing.
  *
- * @param parent The VisualDeckStorageWidget owning the search.
+ * @param parent The parent widget.
  */
-VisualDeckStorageSearchWidget::VisualDeckStorageSearchWidget(VisualDeckStorageWidget *parent) : parent(parent)
+VisualDeckStorageSearchWidget::VisualDeckStorageSearchWidget(QWidget *parent) : QWidget(parent)
 {
     layout = new QHBoxLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);
@@ -38,6 +37,5 @@ VisualDeckStorageSearchWidget::VisualDeckStorageSearchWidget(VisualDeckStorageWi
         searchDebounceTimer->start(300); // 300ms debounce
     });
 
-    connect(searchDebounceTimer, &QTimer::timeout, this,
-            [this] { this->parent->proxyModel()->setSearchText(searchBar->text()); });
+    connect(searchDebounceTimer, &QTimer::timeout, this, [this] { emit searchTextChanged(searchBar->text()); });
 }

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_search_widget.h

@@ -11,17 +11,23 @@
 #include <QWidget>
 
 class QTimer;
-class VisualDeckStorageWidget;
+
 class VisualDeckStorageSearchWidget : public QWidget
 {
     Q_OBJECT
 
 public:
-    explicit VisualDeckStorageSearchWidget(VisualDeckStorageWidget *parent);
+    explicit VisualDeckStorageSearchWidget(QWidget *parent);
+
+signals:
+    /**
+     * Emitted once the debounce timer fires after the user stopped typing.
+     * @param text The current contents of the search bar.
+     */
+    void searchTextChanged(const QString &text);
 
 private:
     QHBoxLayout *layout;
-    VisualDeckStorageWidget *parent;
     QLineEdit *searchBar;
     QTimer *searchDebounceTimer;
 };

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_widget.cpp

@@ -21,9 +21,9 @@ VisualDeckStorageWidget::VisualDeckStorageWidget(QWidget *parent) : QWidget(pare
 {
     // The model and proxy own all deck data, sorting and filtering. The view widgets below only
     // display the proxy's accepted rows, so nothing touches the filesystem outside the model.
-    model_ = new VisualDeckStorageModel(this);
-    proxyModel_ = new VisualDeckStorageSortFilterProxyModel(this);
-    proxyModel_->setSourceModel(model_);
+    storageModel = new VisualDeckStorageModel(this);
+    storageProxyModel = new VisualDeckStorageSortFilterProxyModel(this);
+    storageProxyModel->setSourceModel(storageModel);
 
     layout = new QVBoxLayout(this);
     layout->setSpacing(0);
@@ -86,17 +86,25 @@ VisualDeckStorageWidget::VisualDeckStorageWidget(QWidget *parent) : QWidget(pare
     refreshTimer->setSingleShot(true);
     refreshTimer->setInterval(150);
     connect(refreshTimer, &QTimer::timeout, this, [this] {
-        proxyModel_->reapplyFilters();
+        storageProxyModel->reapplyFilters();
         // A batch of decks finished loading: re-gather the tag chips from the visible decks once
         // the burst settles instead of on every individual load.
         tagFilterWidget->refreshTags();
     });
-    connect(model_, &QAbstractItemModel::dataChanged, this, [this] { refreshTimer->start(); });
-    connect(model_, &VisualDeckStorageModel::deckLoaded, this, [this] { refreshTimer->start(); });
+    connect(storageModel, &QAbstractItemModel::dataChanged, this, [this] { refreshTimer->start(); });
+    connect(storageModel, &VisualDeckStorageModel::deckLoaded, this, [this] { refreshTimer->start(); });
     // A deck's file path changed: re-apply the sort, since orders like "filename" depend on it.
-    connect(model_, &VisualDeckStorageModel::deckFilePathChanged, this, [this] { proxyModel_->resort(); });
+    connect(storageModel, &VisualDeckStorageModel::deckFilePathChanged, this, [this] { storageProxyModel->resort(); });
     connect(sortWidget, &VisualDeckStorageSortWidget::sortOrderChanged, this,
             &VisualDeckStorageWidget::updateSortOrder);
+    // The filter widgets only own their ui state. Pushing it into the proxy model
+    // happens here, so the children stay decoupled from the model layer.
+    connect(deckPreviewColorIdentityFilterWidget, &DeckPreviewColorIdentityFilterWidget::activeColorsChanged, this,
+            &VisualDeckStorageWidget::updateColorFilter);
+    connect(deckPreviewColorIdentityFilterWidget, &DeckPreviewColorIdentityFilterWidget::filterModeChanged, this,
+            &VisualDeckStorageWidget::updateColorFilter);
+    connect(searchWidget, &VisualDeckStorageSearchWidget::searchTextChanged, this,
+            &VisualDeckStorageWidget::updateSearchFilter);
 
     connect(CardDatabaseManager::getInstance(), &CardDatabase::cardDatabaseLoadingFinished, this,
             &VisualDeckStorageWidget::createRootFolderWidget);
@@ -163,8 +171,8 @@ const VisualDeckStorageQuickSettingsWidget *VisualDeckStorageWidget::settings()
  */
 void VisualDeckStorageWidget::reapplySortAndFilters()
 {
-    proxyModel_->setSortOrder(sortWidget->currentSortOrder());
-    proxyModel_->reapplyFilters();
+    storageProxyModel->setSortOrder(sortWidget->currentSortOrder());
+    storageProxyModel->reapplyFilters();
 }
 
 /**
@@ -172,7 +180,7 @@ void VisualDeckStorageWidget::reapplySortAndFilters()
  */
 void VisualDeckStorageWidget::createRootFolderWidget()
 {
-    model_->setDeckPath(SettingsCache::instance().paths().getDeckPath());
+    storageModel->setDeckPath(SettingsCache::instance().paths().getDeckPath());
 
     folderWidget =
         new VisualDeckStorageFolderDisplayWidget(this, this, QString(), false, quickSettingsWidget->getShowFolders());
@@ -194,19 +202,36 @@ void VisualDeckStorageWidget::updateShowFolders(bool enabled)
 
 void VisualDeckStorageWidget::updateSortOrder()
 {
-    proxyModel_->setSortOrder(sortWidget->currentSortOrder());
+    storageProxyModel->setSortOrder(sortWidget->currentSortOrder());
 }
 
 void VisualDeckStorageWidget::updateTagFilter()
 {
     const QStringList selected = tagFilterWidget->selectedTags();
     const QStringList excluded = tagFilterWidget->excludedTags();
-    proxyModel_->setTagFilter(QSet<QString>(selected.cbegin(), selected.cend()),
-                              QSet<QString>(excluded.cbegin(), excluded.cend()));
+    storageProxyModel->setTagFilter(QSet<QString>(selected.cbegin(), selected.cend()),
+                                    QSet<QString>(excluded.cbegin(), excluded.cend()));
     // The visible deck set changed, so the chips are re-gathered from it.
     tagFilterWidget->refreshTags();
 }
 
+/**
+ * Pushes the color identity filter widget's state into the proxy model.
+ */
+void VisualDeckStorageWidget::updateColorFilter()
+{
+    storageProxyModel->setColorFilter(deckPreviewColorIdentityFilterWidget->getFilterMode(),
+                                      deckPreviewColorIdentityFilterWidget->getActiveColors());
+}
+
+/**
+ * Pushes the search bar's text into the proxy model.
+ */
+void VisualDeckStorageWidget::updateSearchFilter(const QString &text)
+{
+    storageProxyModel->setSearchText(text);
+}
+
 void VisualDeckStorageWidget::updateTagsVisibility(const bool visible)
 {
     if (visible) {

cockatrice/src/interface/widgets/visual_deck_storage/visual_deck_storage_widget.h

@@ -40,11 +40,11 @@ public:
     [[nodiscard]] const VisualDeckStorageQuickSettingsWidget *settings() const;
     [[nodiscard]] VisualDeckStorageModel *model() const
     {
-        return model_;
+        return storageModel;
     }
     [[nodiscard]] VisualDeckStorageSortFilterProxyModel *proxyModel() const
     {
-        return proxyModel_;
+        return storageProxyModel;
     }
 
 public slots:
@@ -57,6 +57,8 @@ public slots:
     void updateSelectionAnimationEnabled(bool enabled);
     void updateSortOrder();
     void updateTagFilter();
+    void updateColorFilter();
+    void updateSearchFilter(const QString &text);
 
 signals:
     void deckLoadRequested(const QString &filePath);
@@ -81,8 +83,8 @@ private:
     VisualDeckStorageQuickSettingsWidget *quickSettingsWidget;
     QScrollArea *scrollArea;
     VisualDeckStorageFolderDisplayWidget *folderWidget = nullptr;
-    VisualDeckStorageModel *model_ = nullptr;
-    VisualDeckStorageSortFilterProxyModel *proxyModel_ = nullptr;
+    VisualDeckStorageModel *storageModel = nullptr;
+    VisualDeckStorageSortFilterProxyModel *storageProxyModel = nullptr;
     QTimer *refreshTimer = nullptr; ///< Coalesces the re-apply/refresh burst following a batch of deck loads.
 };