Handlers

Handlers are the engine's coordinators. OkSceneHandler owns the collection of scenes and decides which one is current. OkTextureHandler is a singleton that loads, stores and reference-counts textures so the same texture is shared rather than reloaded.

OkSceneHandler

Reach the scene handler through OkCore::getSceneHandler(); the engine creates it for you.

Method	Purpose
`void addScene(OkScene *scene, const std::string &name)`	Register a scene.
`void insertScene(OkScene *scene, const std::string &name, int index)`	Insert at a position.
`void setScene(int index)`	Make the scene at `index` current.
`void advance()` / `void goBack()`	Step to the next/previous scene.
`OkScene *getCurrentScene() const`	The current scene.
`int getCurrentSceneIndex() const`	Its index.
`int getSceneCount() const`	Number of registered scenes.

OkTextureHandler

A singleton: call OkTextureHandler::getInstance().

Method	Purpose
`static OkTextureHandler *getInstance()`	The singleton instance.
`OkTexture *createTextureFromFile(const std::string &path)`	Load and store a texture.
`OkTexture *createTextureFromRawData(name, data, width, height, channels)`	Store a texture from raw pixels.
`OkTexture *getTexture(const std::string &name)`	Look up a stored texture (nullptr if absent).
`std::vector<std::string> getTextureNames() const`	Names of all stored textures.
`void addReference(name)` / `void removeReference(name)`	Adjust the reference count.

Example

OkSceneHandler *handler = OkCore::getSceneHandler();
handler->addScene(new OkScene("MainScene"), "MainScene");
handler->setScene(0);

OkTextureHandler *textures = OkTextureHandler::getInstance();
OkTexture *wall = textures->createTextureFromFile("assets/wall.png");