com.bladecoder.engine.ui.HelpScreen.java Source code

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Here is the source code for com.bladecoder.engine.ui.HelpScreen.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 com.bladecoder.engine.ui;

import java.text.MessageFormat;
import java.util.Locale;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.Input.Peripheral;
import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.ScreenAdapter;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.utils.viewport.ScreenViewport;
import com.badlogic.gdx.utils.viewport.Viewport;
import com.bladecoder.engine.assets.EngineAssetManager;
import com.bladecoder.engine.ui.UI.Screens;
import com.bladecoder.engine.ui.defaults.DefaultSceneScreen.UIModes;
import com.bladecoder.engine.util.Config;

public class HelpScreen extends ScreenAdapter implements BladeScreen {
    private final static String PIE_FILENAME = "ui/helpPie";
    private final static String TWO_BUTTONS_FILENAME = "ui/helpDesktop";
    private final static String SINGLE_CLICK_FILENAME = "ui/helpDesktop"; // TODO Help for single button

    private Texture tex;

    private UI ui;

    private String localeFilename;
    private final Viewport viewport = new ScreenViewport();

    private final InputProcessor inputProcessor = new InputAdapter() {
        @Override
        public boolean keyUp(int keycode) {
            switch (keycode) {
            case Input.Keys.ESCAPE:
            case Input.Keys.BACK:
                ui.setCurrentScreen(Screens.MENU_SCREEN);
                break;
            }

            // FIXME: This ALWAYS return true, even when we haven't dealt with the key. Is that expected?
            return true;
        }

        @Override
        public boolean touchUp(int screenX, int screenY, int pointer, int button) {
            ui.setCurrentScreen(Screens.MENU_SCREEN);
            return true;
        }
    };

    @Override
    public void render(float delta) {
        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();
        batch.draw(tex, 0, 0, viewport.getScreenWidth(), viewport.getScreenHeight());
        batch.end();
    }

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

    @Override
    public void dispose() {
        tex.dispose();
    }

    @Override
    public void show() {
        tex = new Texture(EngineAssetManager.getInstance().getResAsset(localeFilename));
        tex.setFilter(TextureFilter.Linear, TextureFilter.Linear);

        Gdx.input.setInputProcessor(inputProcessor);
    }

    @Override
    public void hide() {
        dispose();
    }

    @Override
    public void setUI(UI ui) {
        this.ui = ui;

        final Locale locale = Locale.getDefault();
        String filename = null;

        UIModes uiMode = UIModes.valueOf(Config.getProperty(Config.UI_MODE, "TWO_BUTTONS").toUpperCase());

        if (Gdx.input.isPeripheralAvailable(Peripheral.MultitouchScreen) && uiMode == UIModes.TWO_BUTTONS) {
            uiMode = UIModes.PIE;
        }

        switch (uiMode) {
        case PIE:
            filename = PIE_FILENAME;
            break;
        case SINGLE_CLICK:
            filename = SINGLE_CLICK_FILENAME;
            break;
        case TWO_BUTTONS:
            filename = TWO_BUTTONS_FILENAME;
            break;

        }

        localeFilename = MessageFormat.format("{0}_{1}.png", filename, locale.getLanguage());

        if (!EngineAssetManager.getInstance().assetExists(localeFilename))
            localeFilename = MessageFormat.format("{0}.png", filename);
    }
}