Plugins/ZShell/Blobs/blobgroup.cpp

@@ -67,48 +67,24 @@ void BlobGroup::markDirty() {
 	}
 }
 
-void BlobGroup::markShapeDirty(BlobShape* source, const QRectF& oldGeometry) {
+void BlobGroup::markShapeDirty(BlobShape* source) {
 	m_physicsUpdated = false;
 
 	source->polish();
 	source->update();
 
+	// Use cached padded rects to find spatial neighbors
 	const float pad = static_cast<float>(m_smoothing) * 2.0f;
+	const QRectF srcRect(static_cast<double>(source->m_cachedPaddedX - pad),
+	                     static_cast<double>(source->m_cachedPaddedY - pad), static_cast<double>(source->m_cachedPaddedW + pad * 2.0f),
+	                     static_cast<double>(source->m_cachedPaddedH + pad * 2.0f));
 
-	// Compute the source's dirty rect in scene space using its old position
-	const QPointF oldScene(oldGeometry.x(), oldGeometry.y());
-	const QRectF oldDirtyRect(oldScene.x() - static_cast<double>(pad),
-	                          oldScene.y() - static_cast<double>(pad),
-	                          static_cast<double>(oldGeometry.width() + pad * 2.0),
-	                          static_cast<double>(oldGeometry.height() + pad * 2.0));
-
-	// Compute the source's dirty rect using its new position (fresh from polish)
-	const QRectF newDirtyRect(static_cast<double>(source->m_cachedPaddedX - pad),
-	                          static_cast<double>(source->m_cachedPaddedY - pad),
-	                          static_cast<double>(source->m_cachedPaddedW + pad * 2.0),
-	                          static_cast<double>(source->m_cachedPaddedH + pad * 2.0));
-
-	// Mark shapes near the old position as dirty (prevents ghost blobs after panel moves)
 	for (auto* shape : std::as_const(m_shapes)) {
 		if (shape == source)
 			continue;
-		const QPointF shapeScene = shape->mapToScene(QPointF(0, 0));
-		const QRectF shapeRect(shapeScene.x(), shapeScene.y(),
-		                       static_cast<double>(shape->width()), static_cast<double>(shape->height()));
-		if (oldDirtyRect.intersects(shapeRect)) {
-			shape->polish();
-			shape->update();
-		}
-	}
-
-	// Mark shapes near the new position as dirty
-	for (auto* shape : std::as_const(m_shapes)) {
-		if (shape == source)
-			continue;
-		const QPointF shapeScene = shape->mapToScene(QPointF(0, 0));
-		const QRectF shapeRect(shapeScene.x(), shapeScene.y(),
-		                       static_cast<double>(shape->width()), static_cast<double>(shape->height()));
-		if (newDirtyRect.intersects(shapeRect)) {
+		const QRectF otherRect(static_cast<double>(shape->m_cachedPaddedX), static_cast<double>(shape->m_cachedPaddedY),
+		                       static_cast<double>(shape->m_cachedPaddedW), static_cast<double>(shape->m_cachedPaddedH));
+		if (srcRect.intersects(otherRect)) {
 			shape->polish();
 			shape->update();
 		}

Plugins/ZShell/Blobs/blobgroup.hpp

@@ -45,7 +45,7 @@ BlobInvertedRect* invertedRect() const {
 }
 
 void markDirty();
-void markShapeDirty(BlobShape* source, const QRectF& oldGeometry);
+void markShapeDirty(BlobShape* source);
 void ensurePhysicsUpdated();
 
 signals:

Plugins/ZShell/Blobs/blobshape.cpp

@@ -77,7 +77,7 @@ void BlobShape::geometryChange(const QRectF& newGeometry, const QRectF& oldGeome
 		if (std::abs(m_pendingDx) > 0.5f || std::abs(m_pendingDy) > 0.5f || dw > 0.5 || dh > 0.5) {
 			m_pendingDx = 0;
 			m_pendingDy = 0;
-			m_group->markShapeDirty(this, oldGeometry);
+			m_group->markShapeDirty(this);
 		}
 	}
 }