case GLAND_INDUSTRY_PULLDOWN: // Number of industries

				ShowDropDownMenu(this, _num_inds, _settings_newgame.difficulty.industry_density, GLAND_INDUSTRY_PULLDOWN, 0, 0);

				break;

			case GLAND_RANDOM_BUTTON: // Random seed

				_settings_newgame.game_creation.generation_seed = InteractiveRandom();

				snprintf(this->edit_str_buf, this->edit_str_size, "%u", _settings_newgame.game_creation.generation_seed);

				UpdateTextBufferSize(&this->text);

				this->SetDirty();

				break;

			case GLAND_GENERATE_BUTTON: // Generate

				if (mode == GLWM_HEIGHTMAP &&

						(this->x * 2 < (1U << _settings_newgame.game_creation.map_x) ||

						this->x / 2 > (1U << _settings_newgame.game_creation.map_x) ||

						this->y * 2 < (1U << _settings_newgame.game_creation.map_y) ||

						this->y / 2 > (1U << _settings_newgame.game_creation.map_y))) {

					ShowQuery(

						STR_WARNING_HEIGHTMAP_SCALE_CAPTION,

						STR_WARNING_HEIGHTMAP_SCALE_MESSAGE,

						this,

						LandscapeGenerationCallback);

				} else {

					StartGeneratingLandscape(mode);