Method OnClick

src/town_gui.cpp:281–315

	}

	void OnClick([[maybe_unused]] Point pt, WidgetID widget, [[maybe_unused]] int click_count) override
	{
		switch (widget) {
			case WID_TA_ZONE_BUTTON: {
				bool new_show_state = !this->town->show_zone;
				TownID index = this->town->index;

				new_show_state ? _town_local_authority_kdtree.Insert(index) : _town_local_authority_kdtree.Remove(index);

				this->town->show_zone = new_show_state;
				this->SetWidgetLoweredState(widget, new_show_state);
				SndClickBeep();
				MarkWholeScreenDirty();
				break;
			}

			case WID_TA_COMMAND_LIST: {
				int y = this->GetRowFromWidget(pt.y, WID_TA_COMMAND_LIST, 1, GetCharacterHeight(FS_NORMAL)) - 1;

				auto action = this->enabled_actions.GetNthSetBit(y);
				if (!action.has_value()) break;

				this->sel_action = *action;
				this->SetDirty();

				/* When double-clicking, continue */
				if (click_count == 1 || !this->available_actions.Test(this->sel_action)) break;
				[[fallthrough]];
			}

			case WID_TA_EXECUTE:
				Command<CMD_DO_TOWN_ACTION>::Post(STR_ERROR_CAN_T_DO_THIS, this->town->xy, static_cast<TownID>(this->window_number), this->sel_action);
				break;
		}
	}

	/** Redraw the whole window on a regular interval. */
	const IntervalTimer<TimerWindow> redraw_interval = {std::chrono::seconds(3), [this](auto) {