自学教程：C++ ChangeState函数代码示例

	void AccountActionsManager::handleChangeStatusRequested ()	{		auto action = qobject_cast<QAction*> (sender ());		const auto acc = GetAccountFromSender (sender (), Q_FUNC_INFO);		QVariant stateVar = action->property ("Azoth/TargetState");		EntryStatus status;		if (!stateVar.isNull ())		{			const auto state = stateVar.value<State> ();			status = EntryStatus (state, GetStatusText (action, state));		}		else		{			SetStatusDialog ssd (acc->GetAccountID ());			if (ssd.exec () != QDialog::Accepted)				return;			status = EntryStatus (ssd.GetState (), ssd.GetStatusText ());		}		acc->ChangeState (status);	}

void Engine::Update(){	DeltaTime = m_DeltaTimer.restart();	TotalDeltaTime += DeltaTime;	if(m_QueuedState != nullptr)		ChangeState();	while(m_DisplayWindow.pollEvent(EventHandle))	{		if(EventHandle.type == sf::Event::KeyPressed && EventHandle.key.code == sf::Keyboard::Return && EventHandle.key.alt)		{			VID_FLAGS ^= sf::Style::Fullscreen;			m_DisplayWindow.create(sf::VideoMode(RESOLUTION.x, RESOLUTION.y), WINDOW_TITLE, VID_FLAGS);		}		if (EventHandle.type == sf::Event::Closed)			Quit();	}	if(m_CurrentState != nullptr)		m_CurrentState->Update(DeltaTime);}

void CBTHidConnection::OfferControlSocket(const TBTDevAddr& aAddress,        RSocket*& aSocket)    {        TRACE_FUNC    (_L("[BTHID]/tCBTHidConnection::OfferControlSocket"));    if (aAddress == iDevice->iAddress)        {        __ASSERT_DEBUG((iConnectionState == ELinkLost) || (iConnectionState == EHIDInitConnecting) ||                (iConnectionState == EHIDReconnecting),                User::Panic(KPanicBTConnection, ESocketsBadState));        // Take ownership of this socket        delete iControlSocket;        iControlSocket = aSocket;        aSocket = 0;        // Mark that the HID Device is reconnecting to us. Skip the state change if an initial connection from HID device.         if (iConnectionState != EHIDInitConnecting)             {            ChangeState(EHIDReconnecting);            }        }    }

void TCompGuiDrag::Over(){	if (checkEnabled()) {		if (checkOver()) {			if (controller->IsGuiItemDragged()) {				SetDragState(Clicked);			}			else render_state = RSTATE_OVER;			if (controller->IsLeftPressed()) {				SetValue(value - 0.1f);				notifyValue();			}			else if (controller->IsRightPressed()) {				SetValue(value + 0.1f);				notifyValue();			}		}		else {			ChangeState(STRING(Enabled));			notifyOver(false);		}	}}

void MyWorld::TakenTurn(){    TurnsLeft--;    if (TurnsLeft < 0)    {        // Play end of round music        Audio::PlayMusic("game_over.mp3", false);        // Game over        ChangeState(eGameState_GameOver);    }    else        TurnsLeftChanged = true;    if (HasWon())    {        // Play end of round music        Audio::PlayMusic("end_round.mp3", false);        // Next round        NextRound();    }}

void CAICoreEvent::Update(float _fTime){	if( !m_pCurrState )		return;	if( m_pCurrState->Update(_fTime) )	{		IAIState* pNewState = nullptr;				if( m_pCurrState == &m_cLaserPhase )		{			m_pTower->SetShieldActive(false);			pNewState = &m_cTurretPhase;		}		else if( m_pCurrState == &m_cTurretPhase )			pNewState = &m_cCoreFight;				if( pNewState )			ChangeState(pNewState);		else			CGame::GetInstance()->GetOF()->StopEvent(this);	}}

void PhoenixEngine::ToggleLoading(bool bToggle){	sf::Context Cont;	if(m_LoadingState != nullptr)	{		if(bToggle)		{			bLoading = true;			m_QueuedState = m_LoadingState;			ChangeState();			m_DisplayWindow.setActive(false); //Give thread access to window context			sf::sleep(sf::milliseconds(100));			m_AsyncThread.launch();		}		else		{			bLoading = false;			m_AsyncThread.wait();			sf::sleep(sf::milliseconds(100));			m_DisplayWindow.setActive(true);		}	}}

void CThrowBomb::onCreate(const TMsgEntityCreated& msg) {	if (statemap.empty()) {		//Specific Bomb nodes		AddState("born", (statehandler)&CThrowBomb::Born);		AddState("idle", (statehandler)&CThrowBomb::Idle);		AddState("throwing", (statehandler)&CThrowBomb::Throwing);		AddState("throwed", (statehandler)&CThrowBomb::Throwed);		AddState("impacted", (statehandler)&CThrowBomb::Impacted);		AddState("explode", (statehandler)&CThrowBomb::Explode);		AddState("dead", (statehandler)&CThrowBomb::Dead);	}	____TIMER_REDEFINE_(t_explode, 2.5f);	ChangeState("born");#ifdef CALIBRATE_GAME	if (calibrate) {		lmax = lmax_st;		hmax = hmax_st;		speed = speed_st;		t_explode = timer_st;		rad_squared = powf(radius_st, 2.f);	}#endif}

void TodoList::on_confirmButton_clicked(){    QString name = ui->nameBox->text();    if(name.size() == 0){        warnAniTime = 30;        return;    }    TodoItem item;    item.SetName(name.toStdString());    item.SetPlace(ui->placeBox->text().toStdString());    item.SetContent(ui->contentBox->toPlainText().toStdString());    item.SetLabel(ui->labelBox->text().toStdString());    item.SetKind(ui->comboBox->currentIndex());    QDateTime dateTime = ui->dateTimeEdit->dateTime();    QDate date = dateTime.date();    QTime ti = dateTime.time();    item.SetTime(Date(date.year(),date.month(),date.day(),ti.hour(),ti.minute()));    item.SetWarnTime(ui->horizontalSlider->value() * 5); //以分为单位    int level = 0;    if (ui->radioButton_1->isChecked()) level = 3;    if (ui->radioButton_2->isChecked()) level = 1;    if (ui->radioButton_3->isChecked()) level = 2;    if (ui->radioButton_4->isChecked()) level = 0;    item.SetLevel(level);    if(state == WINSTATE::EDIT){        pa.AddTodo(item);    }else if(state == WINSTATE::DETAIL){        pa.ChangeTodo(item,selectID,viewDate.year,viewDate.month);    }    ChangeState(WINSTATE::LIST);}

/** * /brief determine initial tv state and playgroup for the recording * /param islivetv: true if recording is livetv */void PlayerContext::SetInitialTVState(bool islivetv){    TVState newState = kState_None;    QString newPlaygroup("Default");    LockPlayingInfo(__FILE__, __LINE__);    if (islivetv)    {        SetTVChain(new LiveTVChain());        newState = kState_WatchingLiveTV;    }    else if (playingInfo)    {        int overrecordseconds = gCoreContext->GetNumSetting("RecordOverTime");        QDateTime curtime = MythDate::current();        QDateTime recendts = playingInfo->GetRecordingEndTime()            .addSecs(overrecordseconds);        if (playingInfo->IsRecording())        {            newState = (curtime < recendts) ?                kState_WatchingRecording : kState_WatchingPreRecorded;        }        else if (playingInfo->IsVideoDVD())            newState = kState_WatchingDVD;        else if (playingInfo->IsVideoBD())            newState = kState_WatchingBD;        else            newState = kState_WatchingVideo;        newPlaygroup = playingInfo->GetPlaybackGroup();    }    UnlockPlayingInfo(__FILE__, __LINE__);    ChangeState(newState);    SetPlayGroup(newPlaygroup);}

intSetupZilla(short SpriteNum){    SPRITEp sp = &sprite[SpriteNum];    USERp u;    ANIMATOR DoActorDecide;    if (TEST(sp->cstat, CSTAT_SPRITE_RESTORE))    {        u = User[SpriteNum];        ASSERT(u);    }    else    {        User[SpriteNum] = u = SpawnUser(SpriteNum,ZILLA_RUN_R0,s_ZillaRun[0]);        u->Health = 6000;    }    if (Skill == 0) u->Health = 2000;    if (Skill == 1) u->Health = 4000;    ChangeState(SpriteNum,s_ZillaRun[0]);    u->Attrib = &ZillaAttrib;    DoActorSetSpeed(SpriteNum, NORM_SPEED);    u->StateEnd = s_ZillaDie;    u->Rot = sg_ZillaRun;    EnemyDefaults(SpriteNum, &ZillaActionSet, &ZillaPersonality);    sp->clipdist = (512) >> 2;    sp->xrepeat = 97;    sp->yrepeat = 79;    //SET(u->Flags, SPR_XFLIP_TOGGLE);    return 0;}

//*********************************************************************//// Terminate//	- exit the current state//	- terminate the SGD wrappersvoid Game::Terminate( void ){	// Exit the current state	ChangeState( nullptr );	// Terminate & Deallocate the font	if( m_pFont != nullptr )	{		m_pFont->Terminate();		delete m_pFont;	}	SGD::GraphicsManager::GetInstance()->UnloadTexture(m_hMainMenuBackground);	SGD::GraphicsManager::GetInstance()->UnloadTexture(m_hPlayerImg);	SGD::GraphicsManager::GetInstance()->UnloadTexture(m_hEnemyImg);		// unloads audio	SGD::AudioManager::GetInstance()->UnloadAudio(m_hProjectileSecSfx);	SGD::AudioManager::GetInstance()->UnloadAudio(m_hBackgroundMus);	SGD::AudioManager::GetInstance()->UnloadAudio(m_hEnemyHitSfx);	SGD::AudioManager::GetInstance()->UnloadAudio(m_hGameOverSfx);	SGD::AudioManager::GetInstance()->UnloadAudio(m_hGameWinSfx);	SGD::AudioManager::GetInstance()->UnloadAudio(m_hMenuChangeSfx);	// Terminate the SGD wrappers (in reverse order)	SGD::AudioManager::GetInstance()->Terminate();	SGD::AudioManager::DeleteInstance();		SGD::InputManager::GetInstance()->Terminate();	SGD::InputManager::DeleteInstance();		SGD::GraphicsManager::GetInstance()->Terminate();	SGD::GraphicsManager::DeleteInstance();}

void MyCharacter::OnEvent(const irr::SEvent & e){			//键盘事件	if (e.EventType == EET_KEY_INPUT_EVENT) { 		   if ( 		   //按X 切换 站立 攻击准备模式			if (e.KeyInput.Key == KEY_KEY_X && e.KeyInput.PressedDown==false) { 			   ChangeState();		    }		   			//按R 切换跑步走路 模式			if (e.KeyInput.Key == KEY_KEY_R && e.KeyInput.PressedDown==false) { 				ChangeRunMode();		    }			//按空格,捡物品			if (e.KeyInput.Key == KEY_SPACE && e.KeyInput.PressedDown==false) { 				CollectDropItem();			}			//按Q 使用包裹里的MP恢复药			if (e.KeyInput.Key == KEY_KEY_Q && e.KeyInput.PressedDown==false) { 				//请求使用装备包裹里的消耗品				property.cmd=CMD_C2S_Request_UsePackageHPItem;								cnet->SendMsg((char*)&property,sizeof(RoleProperty));			}	}	}

void CMMAVideoPlayer::CompletePrefetch(TInt aError){    ELOG1(EJavaMMAPI,  "CMMAVideoPlayer::CompletePrefetch + error = %d",aError);    // Post KNotCompleteVideoError as KErrNone to the Java side, because    // video can be played.    if (aError == KNotCompleteVideoError)    {        LOG(EJavaMMAPI, EInfo,  "CMMAVideoPlayer::CompletePrefetch  KNotCompleteVideoError ");        // release java        PostActionCompleted(KErrNone);    }    else    {        LOG(EJavaMMAPI, EInfo,  "CMMAVideoPlayer::CompletePrefetch  CompleteVideoError ");        // release java        PostActionCompleted(aError);    }    if (aError == KErrNone || aError == KNotCompleteVideoError)    {        ChangeState(EPrefetched);    }    LOG(EJavaMMAPI, EInfo,  "CMMAVideoPlayer::CompletePrefetch - ");}

//=====================================================================================////	* Function : ChatchChange()//	* Description //		
C++ ChangeWeapon函数代码示例
C++ ChangeServiceConfig2函数代码示例