Edycja zaznaczonego obszaru na canvasie i Historia

void History::saveStep() {
   
    // if we are not at the end of the history, we need to erase the future steps
    if( _currentStep + 1 <( int )( _steps.size() ) ) {
        _steps.erase( _steps.begin() +( _currentStep + 1 ), _steps.end() );
    }
   
    DebugLog( L"History::saveStep: currentStep=" + std::to_wstring( _currentStep ) + L", stepsCount=" + std::to_wstring( _steps.size() ) );
   
    // save the current state of the animations
    std::shared_ptr < Step > step = std::make_shared < Step >();
    for( auto & animation: animations ) {
        std::shared_ptr < Animation > copied_animation = std::make_shared < Animation >();
        for( auto & frame: animation->_frames ) {
            std::shared_ptr < Frame > copied_frame = std::make_shared < Frame >();
            for( auto & layer: frame->_layers ) {
                std::shared_ptr < Layer > copied_layer = std::make_shared < Layer >( layer );
                copied_frame->addLayer( copied_layer );
            }
            copied_animation->addFrame( copied_frame );
        }
        step->_animations.push_back( copied_animation );
    }
   
    _steps.push_back( step );
    _currentStep++;
}

void Dialog_Brightness_Contrast::setTheFilter() {
   
    if( selection->_state != SelectionState::None ) {
        selection->resizeImage(); // update, żeby nie nadpisywać oryginalnego obrazu zaznaczenia
        set_brightness( * selection->_resizedImage, _brightness_slider->getValue() );
        set_contrast( * selection->_resizedImage, _contrast_slider->getValue() );
    } else {
        // edit all layers of the current frame
        _edited_layers.clear();
        for( auto & org: _original_layers ) {
            _edited_layers.push_back( std::make_shared < Layer >( org ) );
        }
       
        set_brightness( _edited_layers[ getCurrentAnimation()->getCurrentLayerID() ]->_image, _brightness_slider->getValue() );
        set_contrast( _edited_layers[ getCurrentAnimation()->getCurrentLayerID() ]->_image, _contrast_slider->getValue() );
       
        getCurrentAnimation()->getCurrentFrame()->_layers.clear();
        getCurrentAnimation()->getCurrentFrame()->_layers = _edited_layers;
    }
   
}

Dialog_Brightness_Contrast::~Dialog_Brightness_Contrast() {
   
    if( Dialog_Brightness_Contrast::_state == BrightnessContrastState::Idle ) {
        _brightness_slider->setValue( 0 );
        _contrast_slider->setValue( 0 );
        setTheFilter();
       
        getCurrentAnimation()->getCurrentFrame()->_layers.clear();
        getCurrentAnimation()->getCurrentFrame()->_layers = _edited_layers;
        layers_panel->loadLayersFromCurrentFrame();
    } else {
        // is Edited
        history->saveStep();
    }
   
}

Dialog_Brightness_Contrast::~Dialog_Brightness_Contrast() {
   
    if( Dialog_Brightness_Contrast::_state == BrightnessContrastState::Idle ) {
        _brightness_slider->setValue( 0 );
        _contrast_slider->setValue( 0 );
        setTheFilter();
       
        getCurrentAnimation()->getCurrentFrame()->_layers.clear();
        getCurrentAnimation()->getCurrentFrame()->_layers = _edited_layers;
        layers_panel->loadLayersFromCurrentFrame();
    } else {
        // is Edited
        if( selection->_state != SelectionState::None ) {
            sf::Image orginalImage = getCurrentAnimation()->getCurrentLayer()->_image;
            pasteImageWithMask( getCurrentAnimation()->getCurrentLayer()->_image, * selection->_resizedImage, selection->_resizedRect.position.x, selection->_resizedRect.position.y, * selection->_resizedMaskImage,( toolbar->_option_transparency->_checkbox->_value == 0 ) ? sf::Color::Transparent
                : toolbar->_second_color->_color );
            history->saveStep();
            getCurrentAnimation()->getCurrentLayer()->_image = orginalImage;
        }
        else {
            history->saveStep();
        }
    }
}

Dialog_Brightness_Contrast::~Dialog_Brightness_Contrast() {
    try
    {
        // tamten kod
    }
    catch( ... )
    {
    }
}