ScreenManager.h

//#pragma once
#ifndef SCREEN_MANAGER_H
#define SCREEN_MANAGER_H
 
#include "ScreenRouter.h"
#include "ScreenEntry.h"
#include "ScreenTransition.h"
 
 
using ScreenId = uint8_t;
 
class ScreenManager {
 
public:
 
    ~ScreenManager();
 
    void begin();
 
    void update(uint32_t nowMs);
 
    template<typename T>
    bool registerScreen(ScreenId id, T* screen ) {
        if ( id == 0 ) return false;
        if ( haveScreen(id)) return false;
        auto* entry = new ScreenEntryExternal<T>(screen, id);
        entry->instance = screen;
        addScreenEntry(entry);
        if ( begun ) screen->begin();
        return true;
    }
 
    template<typename T>
    bool registerScreen(ScreenId id) {
        if ( id == 0 ) return false;
        if ( haveScreen(id)) return false;
        auto* entry = new ScreenEntryManaged<T>(id);
        addScreenEntry(entry);
        return true;
    }
 
    void setFps(uint8_t fps) {
        if ( fps == 0 ) {
            displayRefreshMs = 0;
        } else {
            displayRefreshMs = (uint16_t)(1000/fps);
        }
    }
 
    uint8_t getFps() {
        return (uint8_t)(displayRefreshMs/1000);
    }
 
 
    // /**
    //  * @brief Get a Screen object (not necessarily the current one)
    //  * 
    //  * @param id The id used to register the screen
    //  * @return IManagedScreen*  or nullptr if screen doesn't exist
    //  */
    // IManagedScreen* getScreen(ScreenId id);
 
 
    bool isCurrent(const ScreenId id);
 
    bool isPrevious(ScreenId id);
 
    IManagedScreen* getCurrent();
 
 
    ScreenId getPreviousId();
 
    bool haveScreen(ScreenId id);
 
    void requestScreen(const ScreenId nextScreen);
 
    void requestScreen(const TransitionIntent& intent);
 
    void addRouter(ScreenRouter* router);
 
    bool setInitialScreen(ScreenId id);
 
 
    private:    
    ScreenEntry* getScreenEntry(ScreenId id);
 
 
 
    private:
 
    void addScreenEntry(ScreenEntry* entry);
 
 
 
    void resolveTransition(const TransitionIntent& intent);
 
 
    ScreenEntry* current = nullptr;
    ScreenEntry* previous = nullptr;
    //ScreenEntry* pausedScreen = nullptr;
    TransitionIntent pendingIntent = {};
    ScreenId initialScreenId = 0;
    bool begun = false;
 
 
    uint16_t displayRefreshMs = 100;
    uint32_t lastDisplayRefresh = 0;
 
 
 
    // List management
    ScreenEntry* firstScreenEntry = nullptr;
    ScreenEntry* lastScreenEntry = nullptr;
 
    ScreenRouter* firstRouter = nullptr;
    ScreenRouter* lastRouter = nullptr;
 
 
};
 
 
#endif