[VDE] Add selection model (#6354)

Took 22 minutes

Took 1 minute


Took 17 seconds

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

cockatrice/src/interface/widgets/cards/card_group_display_widgets/card_group_display_widget.cpp

@@ -10,6 +10,7 @@
 
 CardGroupDisplayWidget::CardGroupDisplayWidget(QWidget *parent,
                                                DeckListModel *_deckListModel,
+                                               QItemSelectionModel *_selectionModel,
                                                QPersistentModelIndex _trackedIndex,
                                                QString _zoneName,
                                                QString _cardGroupCategory,
@@ -17,8 +18,8 @@ CardGroupDisplayWidget::CardGroupDisplayWidget(QWidget *parent,
                                                QStringList _activeSortCriteria,
                                                int bannerOpacity,
                                                CardSizeWidget *_cardSizeWidget)
-    : QWidget(parent), deckListModel(_deckListModel), trackedIndex(_trackedIndex), zoneName(_zoneName),
-      cardGroupCategory(_cardGroupCategory), activeGroupCriteria(_activeGroupCriteria),
+    : QWidget(parent), deckListModel(_deckListModel), selectionModel(_selectionModel), trackedIndex(_trackedIndex),
+      zoneName(_zoneName), cardGroupCategory(_cardGroupCategory), activeGroupCriteria(_activeGroupCriteria),
       activeSortCriteria(_activeSortCriteria), cardSizeWidget(_cardSizeWidget)
 {
     layout = new QVBoxLayout(this);
@@ -32,9 +33,47 @@ CardGroupDisplayWidget::CardGroupDisplayWidget(QWidget *parent,
     CardGroupDisplayWidget::updateCardDisplays();
 
     connect(deckListModel, &QAbstractItemModel::rowsInserted, this, &CardGroupDisplayWidget::onCardAddition);
+    connect(selectionModel, &QItemSelectionModel::selectionChanged, this, &CardGroupDisplayWidget::onSelectionChanged);
     connect(deckListModel, &QAbstractItemModel::rowsRemoved, this, &CardGroupDisplayWidget::onCardRemoval);
 }
 
+void CardGroupDisplayWidget::onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
+{
+    auto proxyModel = qobject_cast<QAbstractProxyModel *>(selectionModel->model());
+
+    for (auto &range : selected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+
+            if (proxyModel) {
+                idx = proxyModel->mapToSource(idx);
+            }
+
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                if (auto displayWidget = qobject_cast<CardInfoPictureWithTextOverlayWidget *>(it.value())) {
+                    displayWidget->setHighlighted(true);
+                }
+            }
+        }
+    }
+
+    for (auto &range : deselected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+            if (proxyModel)
+                idx = proxyModel->mapToSource(idx);
+
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                if (auto displayWidget = qobject_cast<CardInfoPictureWithTextOverlayWidget *>(it.value())) {
+                    displayWidget->setHighlighted(false);
+                }
+            }
+        }
+    }
+}
+
 void CardGroupDisplayWidget::clearAllDisplayWidgets()
 {
     for (auto idx : indexToWidgetMap.keys()) {
@@ -138,6 +177,12 @@ void CardGroupDisplayWidget::onActiveSortCriteriaChanged(QStringList _activeSort
     updateCardDisplays();
 }
 
+void CardGroupDisplayWidget::mousePressEvent(QMouseEvent *event)
+{
+    QWidget::mousePressEvent(event);
+    selectionModel->clearSelection();
+}
+
 void CardGroupDisplayWidget::onClick(QMouseEvent *event, CardInfoPictureWithTextOverlayWidget *card)
 {
     emit cardClicked(event, card);

cockatrice/src/interface/widgets/cards/card_group_display_widgets/card_group_display_widget.h

@@ -11,6 +11,7 @@
 #include "../card_info_picture_with_text_overlay_widget.h"
 #include "../card_size_widget.h"
 
+#include <QItemSelectionModel>
 #include <QLabel>
 #include <QVBoxLayout>
 #include <QWidget>
@@ -24,6 +25,7 @@ class CardGroupDisplayWidget : public QWidget
 public:
     CardGroupDisplayWidget(QWidget *parent,
                            DeckListModel *deckListModel,
+                           QItemSelectionModel *selectionModel,
                            QPersistentModelIndex trackedIndex,
                            QString zoneName,
                            QString cardGroupCategory,
@@ -31,9 +33,11 @@ public:
                            QStringList activeSortCriteria,
                            int bannerOpacity,
                            CardSizeWidget *cardSizeWidget);
+    void onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
     void clearAllDisplayWidgets();
 
     DeckListModel *deckListModel;
+    QItemSelectionModel *selectionModel;
     QPersistentModelIndex trackedIndex;
     QHash<QPersistentModelIndex, QWidget *> indexToWidgetMap;
     QString zoneName;
@@ -43,6 +47,7 @@ public:
     CardSizeWidget *cardSizeWidget;
 
 public slots:
+    void mousePressEvent(QMouseEvent *event) override;
     void onClick(QMouseEvent *event, CardInfoPictureWithTextOverlayWidget *card);
     void onHover(const ExactCard &card);
     virtual QWidget *constructWidgetForIndex(QPersistentModelIndex index);

cockatrice/src/interface/widgets/cards/card_group_display_widgets/flat_card_group_display_widget.cpp

@@ -10,6 +10,7 @@
 
 FlatCardGroupDisplayWidget::FlatCardGroupDisplayWidget(QWidget *parent,
                                                        DeckListModel *_deckListModel,
+                                                       QItemSelectionModel *_selectionModel,
                                                        QPersistentModelIndex _trackedIndex,
                                                        QString _zoneName,
                                                        QString _cardGroupCategory,
@@ -19,6 +20,7 @@ FlatCardGroupDisplayWidget::FlatCardGroupDisplayWidget(QWidget *parent,
                                                        CardSizeWidget *_cardSizeWidget)
     : CardGroupDisplayWidget(parent,
                              _deckListModel,
+                             _selectionModel,
                              std::move(_trackedIndex),
                              _zoneName,
                              _cardGroupCategory,

cockatrice/src/interface/widgets/cards/card_group_display_widgets/flat_card_group_display_widget.h

@@ -17,6 +17,7 @@ class FlatCardGroupDisplayWidget : public CardGroupDisplayWidget
 public:
     FlatCardGroupDisplayWidget(QWidget *parent,
                                DeckListModel *deckListModel,
+                               QItemSelectionModel *selectionModel,
                                QPersistentModelIndex trackedIndex,
                                QString zoneName,
                                QString cardGroupCategory,

cockatrice/src/interface/widgets/cards/card_group_display_widgets/overlapped_card_group_display_widget.cpp

@@ -1,14 +1,12 @@
 #include "overlapped_card_group_display_widget.h"
 
-#include "../card_info_picture_with_text_overlay_widget.h"
-
 #include <QResizeEvent>
-#include <libcockatrice/card/card_info_comparator.h>
 #include <libcockatrice/card/database/card_database_manager.h>
 #include <libcockatrice/models/deck_list/deck_list_model.h>
 
 OverlappedCardGroupDisplayWidget::OverlappedCardGroupDisplayWidget(QWidget *parent,
                                                                    DeckListModel *_deckListModel,
+                                                                   QItemSelectionModel *_selectionModel,
                                                                    QPersistentModelIndex _trackedIndex,
                                                                    QString _zoneName,
                                                                    QString _cardGroupCategory,
@@ -18,6 +16,7 @@ OverlappedCardGroupDisplayWidget::OverlappedCardGroupDisplayWidget(QWidget *pare
                                                                    CardSizeWidget *_cardSizeWidget)
     : CardGroupDisplayWidget(parent,
                              _deckListModel,
+                             _selectionModel,
                              _trackedIndex,
                              _zoneName,
                              _cardGroupCategory,

cockatrice/src/interface/widgets/cards/card_group_display_widgets/overlapped_card_group_display_widget.h

@@ -17,6 +17,7 @@ class OverlappedCardGroupDisplayWidget : public CardGroupDisplayWidget
 public:
     OverlappedCardGroupDisplayWidget(QWidget *parent,
                                      DeckListModel *deckListModel,
+                                     QItemSelectionModel *selectionModel,
                                      QPersistentModelIndex trackedIndex,
                                      QString zoneName,
                                      QString cardGroupCategory,

cockatrice/src/interface/widgets/cards/card_info_picture_with_text_overlay_widget.cpp

@@ -25,7 +25,7 @@ CardInfoPictureWithTextOverlayWidget::CardInfoPictureWithTextOverlayWidget(QWidg
                                                                            const int fontSize,
                                                                            const Qt::Alignment alignment)
     : CardInfoPictureWidget(parent, hoverToZoomEnabled, raiseOnEnter), textColor(textColor), outlineColor(outlineColor),
-      fontSize(fontSize), textAlignment(alignment)
+      fontSize(fontSize), textAlignment(alignment), highlighted(false)
 {
     this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 }
@@ -82,6 +82,16 @@ void CardInfoPictureWithTextOverlayWidget::setTextAlignment(const Qt::Alignment
     update();
 }
 
+void CardInfoPictureWithTextOverlayWidget::setHighlighted(bool _highlighted)
+{
+    if (highlighted == _highlighted) {
+        return;
+    }
+
+    highlighted = _highlighted;
+    update();
+}
+
 void CardInfoPictureWithTextOverlayWidget::mousePressEvent(QMouseEvent *event)
 {
     emit imageClicked(event, this);
@@ -98,11 +108,6 @@ void CardInfoPictureWithTextOverlayWidget::paintEvent(QPaintEvent *event)
     // Call the base class's paintEvent to draw the card image
     CardInfoPictureWidget::paintEvent(event);
 
-    // If no overlay text, skip drawing the text
-    if (overlayText.isEmpty()) {
-        return;
-    }
-
     QStylePainter painter(this);
 
     // Get the pixmap from the base class using the getter
@@ -116,6 +121,36 @@ void CardInfoPictureWithTextOverlayWidget::paintEvent(QPaintEvent *event)
     const QPoint topLeft{(width() - scaledSize.width()) / 2, (height() - scaledSize.height()) / 2};
     const QRect pixmapRect(topLeft, scaledSize);
 
+    if (highlighted) {
+        painter.save();
+        painter.setRenderHint(QPainter::Antialiasing, true);
+
+        // Soft glow and border around the pixmap
+        const int padding = 4; // glow extends a little beyond image
+        QRect glowRect = pixmapRect.adjusted(-padding, -padding, padding, padding);
+
+        QPainterPath path;
+        int radius = 8; // rounded corners
+        path.addRoundedRect(glowRect, radius, radius);
+
+        // Soft outer glow
+        QColor glowColor(0, 150, 255, 80); // subtle blu
+        painter.setPen(QPen(glowColor, 6));
+        painter.drawPath(path);
+
+        // Thin inner border for crispness
+        QColor borderColor(0, 150, 255, 200);
+        painter.setPen(QPen(borderColor, 2));
+        painter.drawRoundedRect(pixmapRect, radius, radius);
+
+        painter.restore();
+    }
+
+    // If no overlay text, skip drawing the text
+    if (overlayText.isEmpty()) {
+        return;
+    }
+
     // Calculate the optimal font size
     QFont font = painter.font();
     int optimalFontSize = fontSize; // Start with the user-defined font size

cockatrice/src/interface/widgets/cards/card_info_picture_with_text_overlay_widget.h

@@ -32,6 +32,7 @@ public:
     void setOutlineColor(const QColor &color);
     void setFontSize(int size);
     void setTextAlignment(Qt::Alignment alignment);
+    void setHighlighted(bool _highlighted);
 
     [[nodiscard]] QSize sizeHint() const override;
 signals:
@@ -53,6 +54,7 @@ private:
     QColor outlineColor;
     int fontSize;
     Qt::Alignment textAlignment;
+    bool highlighted;
 };
 
 #endif // CARD_PICTURE_WITH_TEXT_OVERLAY_H

cockatrice/src/interface/widgets/cards/deck_card_zone_display_widget.cpp

@@ -9,6 +9,7 @@
 
 DeckCardZoneDisplayWidget::DeckCardZoneDisplayWidget(QWidget *parent,
                                                      DeckListModel *_deckListModel,
+                                                     QItemSelectionModel *_selectionModel,
                                                      QPersistentModelIndex _trackedIndex,
                                                      QString _zoneName,
                                                      QString _activeGroupCriteria,
@@ -17,9 +18,10 @@ DeckCardZoneDisplayWidget::DeckCardZoneDisplayWidget(QWidget *parent,
                                                      int bannerOpacity,
                                                      int subBannerOpacity,
                                                      CardSizeWidget *_cardSizeWidget)
-    : QWidget(parent), deckListModel(_deckListModel), trackedIndex(_trackedIndex), zoneName(_zoneName),
-      activeGroupCriteria(_activeGroupCriteria), activeSortCriteria(_activeSortCriteria), displayType(_displayType),
-      bannerOpacity(bannerOpacity), subBannerOpacity(subBannerOpacity), cardSizeWidget(_cardSizeWidget)
+    : QWidget(parent), deckListModel(_deckListModel), selectionModel(_selectionModel), trackedIndex(_trackedIndex),
+      zoneName(_zoneName), activeGroupCriteria(_activeGroupCriteria), activeSortCriteria(_activeSortCriteria),
+      displayType(_displayType), bannerOpacity(bannerOpacity), subBannerOpacity(subBannerOpacity),
+      cardSizeWidget(_cardSizeWidget)
 {
     layout = new QVBoxLayout(this);
     setLayout(layout);
@@ -37,9 +39,34 @@ DeckCardZoneDisplayWidget::DeckCardZoneDisplayWidget(QWidget *parent,
     displayCards();
 
     connect(deckListModel, &QAbstractItemModel::rowsInserted, this, &DeckCardZoneDisplayWidget::onCategoryAddition);
+    connect(selectionModel, &QItemSelectionModel::selectionChanged, this,
+            &DeckCardZoneDisplayWidget::onSelectionChanged);
     connect(deckListModel, &QAbstractItemModel::rowsRemoved, this, &DeckCardZoneDisplayWidget::onCategoryRemoval);
 }
 
+void DeckCardZoneDisplayWidget::onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
+{
+    for (auto &range : selected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                // it.value()->setHighlighted(true);
+            }
+        }
+    }
+
+    for (auto &range : deselected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                // it.value()->setHighlighted(false);
+            }
+        }
+    }
+}
+
 void DeckCardZoneDisplayWidget::cleanupInvalidCardGroup(CardGroupDisplayWidget *displayWidget)
 {
     cardGroupLayout->removeWidget(displayWidget);
@@ -60,8 +87,8 @@ void DeckCardZoneDisplayWidget::constructAppropriateWidget(QPersistentModelIndex
     }
     if (displayType == DisplayType::Overlap) {
         auto *displayWidget = new OverlappedCardGroupDisplayWidget(
-            cardGroupContainer, deckListModel, index, zoneName, categoryName, activeGroupCriteria, activeSortCriteria,
-            subBannerOpacity, cardSizeWidget);
+            cardGroupContainer, deckListModel, selectionModel, index, zoneName, categoryName, activeGroupCriteria,
+            activeSortCriteria, subBannerOpacity, cardSizeWidget);
         connect(displayWidget, &OverlappedCardGroupDisplayWidget::cardClicked, this,
                 &DeckCardZoneDisplayWidget::onClick);
         connect(displayWidget, &OverlappedCardGroupDisplayWidget::cardHovered, this,
@@ -73,9 +100,9 @@ void DeckCardZoneDisplayWidget::constructAppropriateWidget(QPersistentModelIndex
         cardGroupLayout->addWidget(displayWidget);
         indexToWidgetMap.insert(index, displayWidget);
     } else if (displayType == DisplayType::Flat) {
-        auto *displayWidget =
-            new FlatCardGroupDisplayWidget(cardGroupContainer, deckListModel, index, zoneName, categoryName,
-                                           activeGroupCriteria, activeSortCriteria, subBannerOpacity, cardSizeWidget);
+        auto *displayWidget = new FlatCardGroupDisplayWidget(cardGroupContainer, deckListModel, selectionModel, index,
+                                                             zoneName, categoryName, activeGroupCriteria,
+                                                             activeSortCriteria, subBannerOpacity, cardSizeWidget);
         connect(displayWidget, &FlatCardGroupDisplayWidget::cardClicked, this, &DeckCardZoneDisplayWidget::onClick);
         connect(displayWidget, &FlatCardGroupDisplayWidget::cardHovered, this, &DeckCardZoneDisplayWidget::onHover);
         connect(displayWidget, &CardGroupDisplayWidget::cleanupRequested, this,

cockatrice/src/interface/widgets/cards/deck_card_zone_display_widget.h

@@ -26,6 +26,7 @@ class DeckCardZoneDisplayWidget : public QWidget
 public:
     DeckCardZoneDisplayWidget(QWidget *parent,
                               DeckListModel *deckListModel,
+                              QItemSelectionModel *selectionModel,
                               QPersistentModelIndex trackedIndex,
                               QString zoneName,
                               QString activeGroupCriteria,
@@ -34,7 +35,9 @@ public:
                               int bannerOpacity,
                               int subBannerOpacity,
                               CardSizeWidget *_cardSizeWidget);
+    void onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
     DeckListModel *deckListModel;
+    QItemSelectionModel *selectionModel;
     QPersistentModelIndex trackedIndex;
     QString zoneName;
     void addCardsToOverlapWidget();

cockatrice/src/interface/widgets/deck_editor/deck_editor_deck_dock_widget.h

@@ -51,6 +51,11 @@ public:
         return activeGroupCriteriaComboBox;
     }
 
+    [[nodiscard]] QItemSelectionModel *getSelectionModel() const
+    {
+        return deckView->selectionModel();
+    }
+
 public slots:
     void cleanDeck();
     void updateBannerCardComboBox();

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

@@ -176,20 +176,74 @@ void TabDeckEditorVisual::changeModelIndexToCard(const ExactCard &activeCard)
     if (!index.isValid()) {
         index = deckDockWidget->deckModel->findCard(cardName, DECK_ZONE_SIDE);
     }
-    deckDockWidget->deckView->setCurrentIndex(index);
+    if (!deckDockWidget->getSelectionModel()->hasSelection()) {
+        deckDockWidget->getSelectionModel()->setCurrentIndex(index, QItemSelectionModel::NoUpdate);
+    }
 }
 
-/** @brief Handles clicks on cards in the mainboard deck. */
 void TabDeckEditorVisual::processMainboardCardClick(QMouseEvent *event,
                                                     CardInfoPictureWithTextOverlayWidget *instance,
-                                                    QString zoneName)
+                                                    const QString &zoneName)
 {
+    auto card = instance->getCard();
+
+    // Get the model index for the card
+    QModelIndex idx = deckDockWidget->deckModel->findCard(card.getName(), zoneName);
+    if (!idx.isValid()) {
+        return;
+    }
+
+    QItemSelectionModel *sel = deckDockWidget->getSelectionModel();
+
+    // Double click = swap
+    if (event->type() == QEvent::MouseButtonDblClick && event->button() == Qt::LeftButton) {
+        actSwapCard(card, zoneName);
+        idx = deckDockWidget->deckModel->findCard(card.getName(), zoneName);
+        sel->setCurrentIndex(idx, QItemSelectionModel::ClearAndSelect);
+        return;
+    }
+
+    // Right-click = decrement
+    if (event->button() == Qt::RightButton) {
+        actDecrementCard(card);
+        //  Keep selection intact.
+        return;
+    }
+
+    // Alt + Left click = increment
+    if (event->button() == Qt::LeftButton && event->modifiers().testFlag(Qt::AltModifier)) {
+        // actIncrementCard(card);
+        //  Keep selection intact.
+        return;
+    }
+
+    // Normal selection behavior
     if (event->button() == Qt::LeftButton) {
-        actSwapCard(instance->getCard(), zoneName);
-    } else if (event->button() == Qt::RightButton) {
-        actDecrementCard(instance->getCard());
-    } else if (event->button() == Qt::MiddleButton) {
-        deckDockWidget->actRemoveCard();
+        Qt::KeyboardModifiers mods = event->modifiers();
+        QItemSelectionModel::SelectionFlags flags;
+
+        if (mods.testFlag(Qt::ControlModifier)) {
+            // CTRL + click = toggle selection
+            flags = QItemSelectionModel::Toggle;
+        } else if (mods.testFlag(Qt::ShiftModifier)) {
+            // SHIFT + click = select range
+            QModelIndex anchor = sel->currentIndex();
+            if (!anchor.isValid()) {
+                anchor = idx;
+            }
+
+            QItemSelection range(anchor, idx);
+            sel->select(range, QItemSelectionModel::SelectCurrent);
+            sel->setCurrentIndex(idx, QItemSelectionModel::NoUpdate);
+            return;
+        } else {
+            // Normal click = clear selection, select this, set current
+            deckDockWidget->deckView->setCurrentIndex(idx);
+            deckDockWidget->deckView->scrollTo(idx);
+            return;
+        }
+
+        sel->setCurrentIndex(idx, flags);
     }
 }
 

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

@@ -176,8 +176,9 @@ public slots:
      * @param instance Widget representing the clicked card.
      * @param zoneName Deck zone of the card.
      */
-    void
-    processMainboardCardClick(QMouseEvent *event, CardInfoPictureWithTextOverlayWidget *instance, QString zoneName);
+    void processMainboardCardClick(QMouseEvent *event,
+                                   CardInfoPictureWithTextOverlayWidget *instance,
+                                   const QString &zoneName);
 
     /**
      * @brief Handle card clicks in the database visual display.

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

@@ -28,7 +28,7 @@ TabDeckEditorVisualTabWidget::TabDeckEditorVisualTabWidget(QWidget *parent,
     layout = new QVBoxLayout(this);
     setLayout(layout);
 
-    visualDeckView = new VisualDeckEditorWidget(this, deckModel);
+    visualDeckView = new VisualDeckEditorWidget(this, deckModel, _deckEditor->deckDockWidget->getSelectionModel());
     visualDeckView->setObjectName("visualDeckView");
     connect(visualDeckView, &VisualDeckEditorWidget::activeCardChanged, this,
             &TabDeckEditorVisualTabWidget::onCardChanged);

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

@@ -25,8 +25,10 @@
 #include <libcockatrice/models/deck_list/deck_list_model.h>
 #include <qscrollarea.h>
 
-VisualDeckEditorWidget::VisualDeckEditorWidget(QWidget *parent, DeckListModel *_deckListModel)
-    : QWidget(parent), deckListModel(_deckListModel)
+VisualDeckEditorWidget::VisualDeckEditorWidget(QWidget *parent,
+                                               DeckListModel *_deckListModel,
+                                               QItemSelectionModel *_selectionModel)
+    : QWidget(parent), deckListModel(_deckListModel), selectionModel(_selectionModel)
 {
     // The Main Widget and Main Layout, which contain a single Widget: The Scroll Area
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
@@ -204,6 +206,11 @@ VisualDeckEditorWidget::VisualDeckEditorWidget(QWidget *parent, DeckListModel *_
     connect(deckListModel, &QAbstractItemModel::rowsRemoved, this, &VisualDeckEditorWidget::onCardRemoval);
     constructZoneWidgetsFromDeckListModel();
 
+    if (selectionModel) {
+        connect(selectionModel, &QItemSelectionModel::selectionChanged, this,
+                &VisualDeckEditorWidget::onSelectionChanged);
+    }
+
     retranslateUi();
 }
 
@@ -219,6 +226,47 @@ void VisualDeckEditorWidget::retranslateUi()
         tr("Change how cards are displayed within zones (i.e. overlapped or fully visible.)"));
 }
 
+void VisualDeckEditorWidget::setSelectionModel(QItemSelectionModel *model)
+{
+    if (selectionModel == model) {
+        return;
+    }
+
+    if (selectionModel) {
+        // TODO: Possibly disconnect old ones?
+    }
+
+    selectionModel = model;
+
+    if (selectionModel) {
+        connect(selectionModel, &QItemSelectionModel::selectionChanged, this,
+                &VisualDeckEditorWidget::onSelectionChanged);
+    }
+}
+
+void VisualDeckEditorWidget::onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
+{
+    for (auto &range : selected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                // it.value()->setHighlighted(true);
+            }
+        }
+    }
+
+    for (auto &range : deselected) {
+        for (int row = range.top(); row <= range.bottom(); ++row) {
+            QModelIndex idx = range.model()->index(row, 0, range.parent());
+            auto it = indexToWidgetMap.find(QPersistentModelIndex(idx));
+            if (it != indexToWidgetMap.end()) {
+                // it.value()->setHighlighted(false);
+            }
+        }
+    }
+}
+
 void VisualDeckEditorWidget::clearAllDisplayWidgets()
 {
     for (auto idx : indexToWidgetMap.keys()) {
@@ -250,25 +298,7 @@ void VisualDeckEditorWidget::onCardAddition(const QModelIndex &parent, int first
                 continue;
             }
 
-            DeckCardZoneDisplayWidget *zoneDisplayWidget = new DeckCardZoneDisplayWidget(
-                zoneContainer, deckListModel, index,
-                deckListModel->data(index.sibling(index.row(), 1), Qt::EditRole).toString(), activeGroupCriteria,
-                activeSortCriteria, currentDisplayType, 20, 10, cardSizeWidget);
-            connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardHovered, this, &VisualDeckEditorWidget::onHover);
-            connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardClicked, this,
-                    &VisualDeckEditorWidget::onCardClick);
-            connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::requestCleanup, this,
-                    &VisualDeckEditorWidget::cleanupInvalidZones);
-            connect(this, &VisualDeckEditorWidget::activeSortCriteriaChanged, zoneDisplayWidget,
-                    &DeckCardZoneDisplayWidget::onActiveSortCriteriaChanged);
-            connect(this, &VisualDeckEditorWidget::activeGroupCriteriaChanged, zoneDisplayWidget,
-                    &DeckCardZoneDisplayWidget::onActiveGroupCriteriaChanged);
-            connect(this, &VisualDeckEditorWidget::displayTypeChanged, zoneDisplayWidget,
-                    &DeckCardZoneDisplayWidget::refreshDisplayType);
-            zoneDisplayWidget->refreshDisplayType(currentDisplayType);
-            zoneContainerLayout->addWidget(zoneDisplayWidget);
-
-            indexToWidgetMap.insert(index, zoneDisplayWidget);
+            constructZoneWidgetForIndex(index);
         }
     }
 }
@@ -287,6 +317,28 @@ void VisualDeckEditorWidget::onCardRemoval(const QModelIndex &parent, int first,
     }
 }
 
+void VisualDeckEditorWidget::constructZoneWidgetForIndex(QPersistentModelIndex persistent)
+{
+    DeckCardZoneDisplayWidget *zoneDisplayWidget = new DeckCardZoneDisplayWidget(
+        zoneContainer, deckListModel, selectionModel, persistent,
+        deckListModel->data(persistent.sibling(persistent.row(), 1), Qt::EditRole).toString(), activeGroupCriteria,
+        activeSortCriteria, currentDisplayType, 20, 10, cardSizeWidget);
+    connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardHovered, this, &VisualDeckEditorWidget::onHover);
+    connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardClicked, this, &VisualDeckEditorWidget::onCardClick);
+    connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::requestCleanup, this,
+            &VisualDeckEditorWidget::cleanupInvalidZones);
+    connect(this, &VisualDeckEditorWidget::activeSortCriteriaChanged, zoneDisplayWidget,
+            &DeckCardZoneDisplayWidget::onActiveSortCriteriaChanged);
+    connect(this, &VisualDeckEditorWidget::activeGroupCriteriaChanged, zoneDisplayWidget,
+            &DeckCardZoneDisplayWidget::onActiveGroupCriteriaChanged);
+    connect(this, &VisualDeckEditorWidget::displayTypeChanged, zoneDisplayWidget,
+            &DeckCardZoneDisplayWidget::refreshDisplayType);
+    zoneDisplayWidget->refreshDisplayType(currentDisplayType);
+    zoneContainerLayout->addWidget(zoneDisplayWidget);
+
+    indexToWidgetMap.insert(persistent, zoneDisplayWidget);
+}
+
 void VisualDeckEditorWidget::constructZoneWidgetsFromDeckListModel()
 {
     QSortFilterProxyModel proxy;
@@ -305,23 +357,7 @@ void VisualDeckEditorWidget::constructZoneWidgetsFromDeckListModel()
             continue;
         }
 
-        DeckCardZoneDisplayWidget *zoneDisplayWidget = new DeckCardZoneDisplayWidget(
-            zoneContainer, deckListModel, persistent,
-            deckListModel->data(persistent.sibling(persistent.row(), 1), Qt::EditRole).toString(), activeGroupCriteria,
-            activeSortCriteria, currentDisplayType, 20, 10, cardSizeWidget);
-        connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardHovered, this, &VisualDeckEditorWidget::onHover);
-        connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::cardClicked, this, &VisualDeckEditorWidget::onCardClick);
-        connect(zoneDisplayWidget, &DeckCardZoneDisplayWidget::requestCleanup, this,
-                &VisualDeckEditorWidget::cleanupInvalidZones);
-        connect(this, &VisualDeckEditorWidget::activeSortCriteriaChanged, zoneDisplayWidget,
-                &DeckCardZoneDisplayWidget::onActiveSortCriteriaChanged);
-        connect(this, &VisualDeckEditorWidget::activeGroupCriteriaChanged, zoneDisplayWidget,
-                &DeckCardZoneDisplayWidget::onActiveGroupCriteriaChanged);
-        connect(this, &VisualDeckEditorWidget::displayTypeChanged, zoneDisplayWidget,
-                &DeckCardZoneDisplayWidget::refreshDisplayType);
-        zoneContainerLayout->addWidget(zoneDisplayWidget);
-
-        indexToWidgetMap.insert(persistent, zoneDisplayWidget);
+        constructZoneWidgetForIndex(persistent);
     }
 }
 
@@ -389,7 +425,16 @@ void VisualDeckEditorWidget::decklistDataChanged(QModelIndex topLeft, QModelInde
 
 void VisualDeckEditorWidget::onHover(const ExactCard &hoveredCard)
 {
+    // If user has any card selected, ignore hover
+    if (selectionModel->hasSelection()) {
+        return;
+    }
+
+    // If nothing is selected -> this is our "active/preview" card
     emit activeCardChanged(hoveredCard);
+
+    // TODO: highlight hovered card visually:
+    // highlightHoveredCard(hoveredCard);
 }
 
 void VisualDeckEditorWidget::onCardClick(QMouseEvent *event,

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

@@ -36,13 +36,20 @@ class VisualDeckEditorWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit VisualDeckEditorWidget(QWidget *parent, DeckListModel *deckListModel);
+    explicit VisualDeckEditorWidget(QWidget *parent, DeckListModel *deckListModel, QItemSelectionModel *selectionModel);
     void retranslateUi();
     void clearAllDisplayWidgets();
     void resizeEvent(QResizeEvent *event) override;
 
     void setDeckList(const DeckList &_deckListModel);
 
+    void setSelectionModel(QItemSelectionModel *model);
+    void onSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
+    QItemSelectionModel *getSelectionModel() const
+    {
+        return selectionModel;
+    }
+
     QLineEdit *searchBar;
     CardSizeWidget *cardSizeWidget;
 
@@ -53,6 +60,7 @@ public slots:
     void cleanupInvalidZones(DeckCardZoneDisplayWidget *displayWidget);
     void onCardAddition(const QModelIndex &parent, int first, int last);
     void onCardRemoval(const QModelIndex &parent, int first, int last);
+    void constructZoneWidgetForIndex(QPersistentModelIndex persistent);
     void constructZoneWidgetsFromDeckListModel();
 
 signals:
@@ -72,6 +80,7 @@ protected slots:
 
 private:
     DeckListModel *deckListModel;
+    QItemSelectionModel *selectionModel;
     QVBoxLayout *mainLayout;
     QWidget *searchContainer;
     QHBoxLayout *searchLayout;