AbstractScreen.java

package org.sandholm.max.airplane;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;

public abstract class AbstractScreen implements Screen {

    protected final AirplaneGame game;
    protected final BitmapFont font;
    protected final SpriteBatch batch;
    protected final Stage stage;
    private Table table;
    private Skin skin;

    public AbstractScreen(AirplaneGame game ) {
            this.game = game;
            this.font = new BitmapFont();
            this.batch = new SpriteBatch();
            this.stage = new Stage(Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), true, batch);
            //this.stage
    }

    @Override
    public void render(float delta) {
        //Gdx.gl.glViewport((int) viewport.x, (int) viewport.y, (int) viewport.width, (int) viewport.height);

        //Gdx.gl.glClearColor(0f, 0f, 0f, 1f);
        //Gdx.gl.glClear( GL20.GL_COLOR_BUFFER_BIT );

        stage.act( delta );
        stage.draw();

    }

    protected Skin getSkin()
    {
        if( skin == null ) {
            FileHandle skinFile = Gdx.files.internal( "uiskin/uiskin.json" );
            skin = new Skin( skinFile );
        }
        return skin;
    }

    protected Table getTable()
    {
        if( table == null ) {
            table = new Table(getSkin());
            table.setFillParent( true );
            stage.addActor( table );
        }
        return table;
    }

    @Override
    public void resize(int width, int height) {
    }

    @Override
    public void show() {
        // TODO Auto-generated method stub

    }

    @Override
    public void hide() {
        // TODO Auto-generated method stub

    }

    @Override
    public void pause() {
        // TODO Auto-generated method stub

    }

    @Override
    public void resume() {
        // TODO Auto-generated method stub

    }

    @Override
    public void dispose() {
        stage.dispose();
        font.dispose();
        batch.dispose();
    }

}