Pause music when lost window focus

src/main.c

@@ -100,6 +100,18 @@ int main(int argc, char *argv[])
 					case SDL_QUIT:
 						exit(0);
 						break;
+
+					case SDL_WINDOWEVENT:
+						switch (event.window.event)
+						{
+							case SDL_WINDOWEVENT_FOCUS_GAINED:
+								musicSetPlaying(1);
+								break;
+							case SDL_WINDOWEVENT_FOCUS_LOST:
+								musicSetPlaying(0);
+								break;
+						}
+						break;
 				}
 			}
 			

src/main.h

@@ -54,6 +54,7 @@ extern void saveGame(void);
 extern void initCredits(void);
 extern void doTrophyAlerts(void);
 extern void drawTrophyAlert(void);
+extern void musicSetPlaying(int playing);
 
 App app;
 Colors colors;

src/system/sound.c

@@ -56,6 +56,21 @@ void stopMusic(void)
 	Mix_HaltMusic();
 }
 
+void musicSetPlaying(int playing)
+{
+	if (music != NULL)
+	{
+		if (playing)
+		{
+			Mix_ResumeMusic();
+		}
+		else
+		{
+			Mix_PauseMusic();
+		}
+	}
+}
+
 void playSound(int id)
 {
 	Mix_PlayChannel(-1, sounds[id], 0);