show a notification "click a player or flag to follow it" when joining spectator

Author: oy

src/game/client/components/hud.cpp

@@ -662,6 +662,18 @@ void CHud::RenderSpectatorHud()
 	TextRender()->TextEx(&Cursor, aBuf, -1);
 }
 
+void CHud::RenderSpectatorNotification()
+{
+	if(m_pClient->m_aClients[m_pClient->m_LocalClientID].m_Team == TEAM_SPECTATORS &&
+		m_pClient->m_TeamChangeTime + 5.0f >= Client()->LocalTime())
+	{
+		const char *pText = Localize("Click on a player or a flag to follow it");
+		float FontSize = 16.0f;
+		float w = TextRender()->TextWidth(0, FontSize, pText, -1);
+		TextRender()->Text(0, 150 * Graphics()->ScreenAspect() + -w / 2, 30, FontSize, pText, -1);
+	}
+}
+
 void CHud::OnRender()
 {
 	if(!m_pClient->m_Snap.m_pGameData)
@@ -684,6 +696,7 @@ void CHud::OnRender()
 			if(m_pClient->m_Snap.m_SpecInfo.m_SpectatorID != -1)
 				RenderHealthAndAmmo(&m_pClient->m_Snap.m_aCharacters[m_pClient->m_Snap.m_SpecInfo.m_SpectatorID].m_Cur);
 			RenderSpectatorHud();
+			RenderSpectatorNotification();
 		}
 
 		RenderGameTimer();

src/game/client/components/hud.h

@@ -25,6 +25,7 @@ class CHud : public CComponent
 	void RenderSuddenDeath();
 	void RenderScoreHud();
 	void RenderSpectatorHud();
+	void RenderSpectatorNotification();
 	void RenderWarmupTimer();
 public:
 	CHud();

src/game/client/gameclient.cpp

@@ -367,6 +367,7 @@ void CGameClient::OnReset()
 
 	m_LocalClientID = -1;
 	m_TeamCooldownTick = 0;
+	m_TeamChangeTime = 0.0f;
 	mem_zero(&m_GameInfo, sizeof(m_GameInfo));
 	m_DemoSpecMode = SPEC_FREEVIEW;
 	m_DemoSpecID = -1;
@@ -623,6 +624,7 @@ void CGameClient::OnMessage(int MsgId, CUnpacker *pUnpacker)
 				return;
 			}
 			m_LocalClientID = pMsg->m_ClientID;
+			m_TeamChangeTime = Client()->LocalTime();
 		}
 		else
 		{
@@ -744,6 +746,7 @@ void CGameClient::OnMessage(int MsgId, CUnpacker *pUnpacker)
 
 			if(pMsg->m_ClientID == m_LocalClientID)
 				m_TeamCooldownTick = pMsg->m_CooldownTick;
+			m_TeamChangeTime = Client()->LocalTime();
 		}
 
 		if(pMsg->m_Silent == 0)

src/game/client/gameclient.h

@@ -195,6 +195,7 @@ class CGameClient : public IGameClient
 	int m_LocalClientID;
 	int m_TeamCooldownTick;
 	bool m_MuteServerBroadcast;
+	float m_TeamChangeTime;
 
 	struct CGameInfo
 	{