package sagittarius.view;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.Screen;

public abstract class BaseScreen implements Screen {
    
    protected Stage mainStage;
    protected Stage uiStage;
    
    public BaseScreen() {
        mainStage = new Stage();
        uiStage = new Stage();
        initialize();
    }

    public abstract void initialize();
    public abstract void update(float dt);
    
    @Override
    public void render(float dt) {
        
        // update actors
        uiStage.act(dt);
        mainStage.act(dt);
        
        // update
        update(dt);

        // clear screen
        Gdx.gl.glClearColor(0,0,0,1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        
        // draw actors on screnn
        mainStage.draw();
        uiStage.draw();
    }
    
    @Override public void dispose() {
        uiStage.dispose();
        mainStage.dispose();
    }

    // methods required by Screen interface
    @Override public void resize(int width, int height) {}
    @Override public void pause() {}
    @Override public void resume(){}
    @Override public void show() {}
    @Override public void hide() {}
}