Method decreaseSelectedAffinity

source/core/DocumentViewport.cpp:8209–8252

}

void DocumentViewport::decreaseSelectedAffinity()
{
    if (!m_document || m_selectedObjects.isEmpty()) return;
    
    const int minAffinity = -1;  // Background
    #ifdef SPEEDYNOTE_DEBUG
    qDebug() << "decreaseSelectedAffinity: minAffinity =" << minAffinity;
    #endif
    
    for (InsertedObject* obj : m_selectedObjects) {
        if (!obj) continue;
        
        int currentAffinity = obj->getLayerAffinity();
        if (currentAffinity <= minAffinity) {
            #ifdef SPEEDYNOTE_DEBUG
            qDebug() << "  obj" << obj->id << "already at min affinity" << currentAffinity;
            #endif
            continue;
        }
        
        Document::TileCoord tileCoord = {0, 0};
        Page* page = findPageContainingObject(obj, &tileCoord);
        if (!page) continue;
        
        int oldAffinity = currentAffinity;
        page->updateObjectAffinity(obj->id, currentAffinity - 1);
        
        #ifdef SPEEDYNOTE_DEBUG
        qDebug() << "  obj" << obj->id << "affinity:" << oldAffinity 
                 << "->" << obj->getLayerAffinity();
        #endif
        // Phase O3.5.3: Push undo entry for affinity change
        pushObjectAffinityUndo(obj, oldAffinity);
        
        if (m_document->isEdgeless()) {
            m_document->markTileDirty(tileCoord);
        } else {
            m_document->markPageDirty(m_currentPageIndex);
        }
    }
    
    emit documentModified();
    update();
}

void DocumentViewport::toggleImageAspectRatioLock()
{