/**
	 * Some data on this window has become invalid.
	 * @param data Information about the changed data.
	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
	 */
	virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
	{
		if (!IsSelectable(this->selected_slot)) {
			this->selected_slot = INVALID_COMPANY;
		}

		if (!gui_scope) return;

		this->SetWidgetDisabledState(WID_AIC_DECREASE, GetGameSettings().difficulty.max_no_competitors == 0);
		this->SetWidgetDisabledState(WID_AIC_INCREASE, GetGameSettings().difficulty.max_no_competitors == MAX_COMPANIES);
		this->SetWidgetDisabledState(WID_AIC_MOVE_UP, this->selected_slot == INVALID_COMPANY || this->selected_slot == OWNER_DEITY || Company::IsValidAiID(this->selected_slot) || GetFreeSlot(this->selected_slot, -1) == INVALID_COMPANY);
		this->SetWidgetDisabledState(WID_AIC_MOVE_DOWN, this->selected_slot == INVALID_COMPANY || this->selected_slot == OWNER_DEITY || Company::IsValidAiID(this->selected_slot) || GetFreeSlot(this->selected_slot, +1) == INVALID_COMPANY);

		for (CompanyID cid = COMPANY_FIRST; cid < MAX_COMPANIES; cid++) {
			if (!Company::IsValidAiID(cid) && AIConfig::GetConfig(cid)->IsRandom()) {
				AIConfig::GetConfig(cid)->Change(NULL);
				DeleteWindowById(WC_AI_SETTINGS, cid);
				DeleteWindowByClass(WC_TEXTFILE);
				DeleteWindowByClass(WC_QUERY_STRING);
			}
		}

		this->SetWidgetDisabledState(WID_AIC_CHANGE, this->selected_slot == INVALID_COMPANY || this->selected_slot == OWNER_DEITY && (_game_mode == GM_NORMAL || (_game_mode == GM_EDITOR && Game::GetInstance() != NULL)) || Company::IsValidAiID(this->selected_slot));
		this->SetWidgetDisabledState(WID_AIC_CONFIGURE, this->selected_slot == INVALID_COMPANY || GetConfig(this->selected_slot)->GetConfigList()->size() == 0 || _game_mode == GM_EDITOR && !IsConsideredDead(this->selected_slot));

		/* Display either Settings or Configure button */
		NWidgetCore *configure_button = this->GetWidget<NWidgetCore>(WID_AIC_CONFIGURE);
		if (this->selected_slot != INVALID_COMPANY && !IsConsideredDead(this->selected_slot)) {
			configure_button->SetDataTip(STR_AI_DEBUG_SETTINGS, STR_AI_DEBUG_SETTINGS_TOOLTIP);
		} else {
			configure_button->SetDataTip(STR_AI_CONFIG_CONFIGURE, STR_AI_CONFIG_CONFIGURE_TOOLTIP);
		}

		this->SetWidgetDisabledState(WID_AIC_START_STOP_TOGGLE, _game_mode != GM_NORMAL || this->selected_slot == INVALID_COMPANY || this->selected_slot == OWNER_DEITY || Company::IsValidHumanID(this->selected_slot) || GetCurrentNoAIs() >= GetGameSettings().difficulty.max_no_competitors && !Company::IsValidID(this->selected_slot));

		/* Display either Start AI or Stop AI button */
		NWidgetCore *toggle_button = this->GetWidget<NWidgetCore>(WID_AIC_START_STOP_TOGGLE);
		if (this->selected_slot == INVALID_COMPANY || this->selected_slot == OWNER_DEITY || Company::IsValidHumanID(this->selected_slot) || !Company::IsValidAiID(this->selected_slot)) {
			toggle_button->SetDataTip(STR_AI_CONFIG_START, STR_AI_CONFIG_START_TOOLTIP);
		} else {
			toggle_button->SetDataTip(STR_AI_CONFIG_STOP, STR_AI_CONFIG_STOP_TOOLTIP);
		}

		for (TextfileType tft = TFT_BEGIN; tft < TFT_END; tft++) {
			this->SetWidgetDisabledState(WID_AIC_TEXTFILE + tft, this->selected_slot == INVALID_COMPANY || (GetConfig(this->selected_slot)->GetTextfile(tft, this->selected_slot) == NULL));
		}
	}
};