org.bladecoder.bladeengine.ui.LoadingScreen.java Source code

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Here is the source code for org.bladecoder.bladeengine.ui.LoadingScreen.java

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/*******************************************************************************
 * Copyright 2014 Rafael Garcia Moreno.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.bladecoder.bladeengine.ui;

import org.bladecoder.bladeengine.model.World;
import org.bladecoder.bladeengine.model.World.AssetState;
import org.bladecoder.bladeengine.ui.UI.State;
import org.bladecoder.bladeengine.util.RectangleRenderer;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.utils.viewport.ScreenViewport;
import com.badlogic.gdx.utils.viewport.Viewport;

public class LoadingScreen implements Screen {
    private final static float INIT_TIME = 4f;

    private int pos = 0;
    private int numSquares = 3;

    private float x, y;

    private float squareWidth = 30f;
    private float squareHeight = 30f;
    private float margin = 10f;

    private float initTime = 0;

    private float delta = 0;

    private UI ui;

    private final Viewport viewport = new ScreenViewport();

    public LoadingScreen(UI ui) {
        this.ui = ui;
    }

    @Override
    public void render(float delta) {
        if (!World.getInstance().isDisposed()) {
            World.getInstance().update(delta);
        }

        AssetState assetState = World.getInstance().getAssetState();

        if (assetState == AssetState.LOADED) {
            ui.setScreen(State.SCENE_SCREEN);
            return;
        }

        // Only show the screen when time > INIT_TIME
        if (initTime < INIT_TIME) {
            initTime += delta;
            return;
        }

        SpriteBatch batch = ui.getBatch();

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

        batch.setProjectionMatrix(viewport.getCamera().combined);
        batch.begin();

        update(delta);

        for (int i = 0; i < numSquares; i++) {

            if (i == pos)
                RectangleRenderer.draw(ui.getBatch(), x + i * (squareWidth + margin), y, squareWidth, squareHeight,
                        Color.WHITE);
            else
                RectangleRenderer.draw(ui.getBatch(), x + i * (squareWidth + margin), y, squareWidth, squareHeight,
                        Color.GRAY);
        }
        batch.end();
    }

    private void update(float d) {
        delta += d;

        if (delta > 0.4) {
            pos = (pos + 1) % numSquares;
            delta = 0;
        }
    }

    @Override
    public void resize(int width, int height) {
        viewport.update(width, height, true);

        x = (viewport.getWorldWidth() - (squareWidth * numSquares + margin * (numSquares - 1))) / 2;
        y = (viewport.getWorldHeight() - squareHeight) / 2;
    }

    @Override
    public void dispose() {

    }

    @Override
    public void show() {
        Gdx.input.setInputProcessor(null);
        initTime = 0;
        delta = 0;
    }

    @Override
    public void hide() {

    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

}