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cockatrice/src/game_graphics/game_view.cpp

@@ -129,14 +129,13 @@ void GameView::resizeRubberBand(const QPointF &cursorPoint, int selectedCount)
     QPoint cursor = cursorPoint.toPoint();
     QRect rect = QRect(mapFromScene(selectionOrigin), cursor).normalized();
 
-    // Explicitly repaint the strip the band just vacated. When the band is a
-    // child widget, the viewport does not reliably receive the exposed region
-    // on all platforms (notably macOS), which would leave stale band pixels on
-    // screen until the next unrelated repaint.
-    const QRect previousGeometry = rubberBand->geometry();
     rubberBand->setGeometry(rect);
     if (viewport()) {
-        viewport()->update(previousGeometry.united(rect));
+        // Repaint the whole viewport rather than just the band's old area: the
+        // vacated strip of a child widget is not reliably invalidated on all
+        // platforms (notably macOS), leaving stale pixels — including black
+        // scene background where the playmat should show — under the selection.
+        viewport()->update();
     }
 
     if (!SettingsCache::instance().userInterface().getShowDragSelectionCount()) {
@@ -180,13 +179,12 @@ void GameView::stopRubberBand()
         return;
     }
 
-    // Same rationale as resizeRubberBand. Make sure the area under the band is
+    // Same rationale as resizeRubberBand: make sure the whole viewport is
-    // repainted, since some platforms skip the exposed-region update of a
+    // repainted once the band is gone, since some platforms skip the exposed
-    // hidden child widget.
+    // region update of a hidden child widget.
-    const QRect bandGeometry = rubberBand->geometry();
     rubberBand->hide();
     if (viewport()) {
-        viewport()->update(bandGeometry);
+        viewport()->update();
     }
     dragCountLabel->hide();
 }

cockatrice/src/game_graphics/player/player_graphics_item.cpp

@@ -124,7 +124,6 @@ void PlayerGraphicsItem::initializeZones()
     rfgZoneGraphicsItem->setPos(base + QPointF(0, 2 * h + h2 + 10));
 
     tableZoneGraphicsItem = new TableZone(player->getTableZone(), mirrored, this);
-    connect(tableZoneGraphicsItem, &TableZone::sizeChanged, this, &PlayerGraphicsItem::updateBoundingRect);
     connect(this, &PlayerGraphicsItem::mirroredChanged, tableZoneGraphicsItem, &TableZone::setMirrored);
 
     stackZoneGraphicsItem =

cockatrice/src/game_graphics/zones/table_zone.h

@@ -188,8 +188,17 @@ public:
     }
     void setWidth(qreal _width)
     {
+        // The width is stored as an int; truncate to match the previous implicit conversion.
+        const int newWidth = static_cast<int>(_width);
+        if (width == newWidth) {
+            return;
+        }
         prepareGeometryChange();
-        width = _width;
+        width = newWidth;
+        // The parent player item's boundingRect (which clips the playmat painting) is
+        // derived from this zone's size. Without this signal the playmat is cut off at
+        // the stale boundingRect edge whenever the scene is resized wider.
+        emit sizeChanged();
     }
     [[nodiscard]] qreal getWidth() const
     {