StateManger.cpp

00001 #include "StateManager.h "
00002 
00003 /// @file StateManager.cpp
00004 
00005 void StateManager::changeState(MainState newState)
00006 {
00007     if (currentState != 0)      // if a state exist
00008         delete currentState;    // delete the old state
00009 
00010     // Create new state
00011     switch (newState)
00012     {
00013         case MAIN_MENU:
00014             currentState = new MainMenu(this, lcd, input, sound, shiftreg);
00015         break;
00016         
00017         case GAME:
00018             currentState = new Game(this, lcd, input, sound, shiftreg);
00019         break;
00020         
00021         case TITLE_SCREEN:
00022             currentState = new CoverPage(this, lcd, input, sound, shiftreg);
00023         break;
00024         
00025         case SUBMIT_HIGHSCORE:
00026             currentState = new Achievement(this, lcd, input, sound, shiftreg);
00027         break;
00028         
00029         case GAME_OVER:
00030             currentState = new GameOver(this, lcd, input, sound, shiftreg);
00031         break;
00032 
00033         default:
00034             ; // error: this shouldn't happen
00035     }
00036 }
00037 
00038 void StateManager::requestStateChange(MainState requestedState)
00039 {
00040     if (nextState != NO_STATE)
00041         error("Invalid - can't request new state before the first request has been processed!");
00042         
00043     nextState = requestedState;
00044 }
00045 
00046 void StateManager::update(float dt)
00047 {       
00048     currentState->update(dt);
00049 }
00050 
00051 void StateManager::render()
00052 {
00053     currentState->render();
00054 }
00055 
00056 void StateManager::processRequest()
00057 {
00058     // Check if there has been a request to change the state
00059     if (nextState != NO_STATE)
00060     {
00061         changeState(nextState);
00062         nextState = NO_STATE;       // reset, state has been changed
00063     }
00064 }