GUI1 button code

    surface button_image(image::get_image(button_image_name_ + ".png"));
    surface pressed_image(image::get_image(button_image_name_ + "-pressed.png"));
    surface active_image(image::get_image(button_image_name_ + "-active.png"));
    surface disabled_image;
    if (file_exists(game_config::path + "/images/" + button_image_name_ + "-disabled.png"))
        disabled_image.assign((image::get_image(button_image_name_ + "-disabled.png")));
    surface pressed_disabled_image, pressed_active_image, touched_image;

    if (!button_overlay_image_name_.empty()) {
        overlayImage_.assign(image::get_image(button_overlay_image_name_ + size_postfix + ".png"));
        overlayPressedImage_.assign(image::get_image(button_overlay_image_name_ + size_postfix + "-pressed.png"));
        if (file_exists(game_config::path + "/images/" + button_overlay_image_name_ + size_postfix + "-active.png"))
            overlayActiveImage_.assign(image::get_image(button_overlay_image_name_ + size_postfix + "-active.png"));
        if (file_exists(game_config::path + "/images/" + button_overlay_image_name_ + size_postfix + "-disabled-pressed.png"))
            overlayPressedDisabledImage_.assign(image::get_image(button_overlay_image_name_ + size_postfix + "-disabled-pressed.png"));
        if (file_exists(game_config::path + "/images/" + button_overlay_image_name_ + size_postfix +  "-disabled.png"))
            overlayDisabledImage_.assign(image::get_image(button_overlay_image_name_ + size_postfix + "-disabled.png"));
        if (overlayDisabledImage_.null())
                overlayDisabledImage_ = image::get_image(button_overlay_image_name_ + size_postfix + ".png~GS()");
        if (overlayPressedDisabledImage_.null())
                overlayPressedDisabledImage_ = image::get_image(button_overlay_image_name_ + size_postfix + "-pressed.png~GS()");
    } else {
        overlayImage_.assign(NULL);
    }

    if (disabled_image == NULL) {
        disabled_image = image::get_image(button_image_name_ + ".png~GS()");
    }

    if (pressed_image.null())
        pressed_image.assign(button_image);

    if (active_image.null())
        active_image.assign(button_image);

    if (type_ == TYPE_CHECK || type_ == TYPE_RADIO) {
        touched_image.assign(image::get_image(button_image_name_ + "-touched.png"));
        if (touched_image.null())
            touched_image.assign(pressed_image);

        pressed_active_image.assign(image::get_image(button_image_name_ + "-active-pressed.png"));
        if (pressed_active_image.null())
            pressed_active_image.assign(pressed_image);

        pressed_disabled_image.assign(image::get_image(button_image_name_ + "-disabled-pressed.png"));
        if (pressed_disabled_image.null())
            pressed_disabled_image = image::get_image(button_image_name_ + "pressed.png~GS()");
    }

    if (button_image.null()) {
        ERR_DP << "error initializing button!\n";
        throw error();
    }