+ GVariant *value = value_.gobj();
+ if (!value)
+ return nullptr;
+
+ spin_box_ = new QSpinBox(parent);
+ spin_box_->setSuffix(suffix_);
+
+ const GVariantType *const type = g_variant_get_type(value);
+ assert(type);
+
+ if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE)) {
+ range_min = 0, range_max = UINT8_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16)) {
+ range_min = INT16_MIN, range_max = INT16_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16)) {
+ range_min = 0, range_max = UINT16_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32)) {
+ range_min = INT32_MIN, range_max = INT32_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32)) {
+ range_min = 0, range_max = UINT32_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64)) {
+ range_min = INT64_MIN, range_max = INT64_MAX;
+ } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64)) {
+ range_min = 0, range_max = UINT64_MAX;
+ } else {
+ // Unexpected value type.
+ assert(false);