MenuView.java

/*
 * Copyright © 2012 Nokia Corporation. All rights reserved.
 * Nokia and Nokia Connecting People are registered trademarks of Nokia Corporation.
 * Oracle and Java are trademarks or registered trademarks of Oracle and/or its
 * affiliates. Other product and company names mentioned herein may be trademarks
 * or trade names of their respective owners.
 * See LICENSE.TXT for license information.
 */
package com.nokia.example.racer.views;

import com.nokia.example.racer.Main;
import com.nokia.example.racer.helpers.ImageLoader;
import com.nokia.example.racer.helpers.KeyCodes;
import com.nokia.example.racer.views.components.ExitButton;
import com.nokia.example.racer.views.components.Button;
import com.nokia.example.racer.views.components.SettingsButton;
import com.nokia.example.racer.views.components.StartButton;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class MenuView
    extends View {

    private Image background, backgroundLandscape;
    private Image shader, shaderLandscape;
    private Timer mTimer;
    private StartButton startButton;
    private SettingsButton settingsButton;
    private ExitButton exitButton;
    private Button[] buttons;
    private int currentActiveItem = 0;

    /**
     * Constructor of MenuView. Loads needed resources and sets positions of
     * them.
     */
    public MenuView() {
        super();
        try {
            ImageLoader loader = ImageLoader.getInstance();
            background = loader.loadImage("/splash_screen.png");
            backgroundLandscape = loader.loadImage(
                "/splash_screen_landscape.png");
            shader = loader.loadImage("/shader.png");
            shaderLandscape = loader.loadImage("/shader_landscape.png");
        }
        catch (IOException io) {
        }
        startButton = new StartButton();
        settingsButton = new SettingsButton();
        exitButton = new ExitButton(Main.getInstance());

        // set positions for buttons
        setPositions();

        // put buttons to an array
        buttons = new Button[3];
        buttons[0] = startButton;
        buttons[1] = settingsButton;
        buttons[2] = exitButton;

        if (!Main.gesturesSupported) {
            startButton.setActive();
        }
    }

    /**
     * Called when this view is changed to be displayed. Starts render thread.
     */
    public void showNotify() {
        mTimer = new Timer();
        g = getGraphics();
        TimerTask ui = new TimerTask() {

            public void run() {
                render(g);
                flushGraphics();
            }
        };
        mTimer.schedule(ui, 0, 30);
    }

    /**
     * Called when this view is hidden. Stops render thread.
     */
    public void hideNotify() {
        mTimer.cancel();
    }

    /*
     * Handle touch events
     */
    protected void pointerPressed(int x, int y) {
        startButton.pointerPressed(x, y);
        settingsButton.pointerPressed(x, y);
        exitButton.pointerPressed(x, y);
    }

    protected void pointerReleased(int x, int y) {
        startButton.pointerReleased(x, y);
        settingsButton.pointerReleased(x, y);
        exitButton.pointerReleased(x, y);
    }

    /*
     * Handle key events
     */
    protected void keyPressed(int keyCode) {
        switch (keyCode) {
            case KeyCodes.UP:
                buttons[currentActiveItem].setInactive();
                if (currentActiveItem == 0) {
                    currentActiveItem = 2;
                }
                else {
                    currentActiveItem--;
                }
                buttons[currentActiveItem].setActive();
                break;
            case KeyCodes.DOWN:
                buttons[currentActiveItem].setInactive();
                if (currentActiveItem == 2) {
                    currentActiveItem = 0;
                }
                else {
                    currentActiveItem++;
                }
                buttons[currentActiveItem].setActive();
                break;
            case KeyCodes.MIDDLE_SOFT_KEY:
                buttons[currentActiveItem].onRelease();
                break;
        }
    }

    protected void sizeChanged(int w, int h) {
        super.sizeChanged(w, h);
        setPositions();
    }

    private void render(Graphics g) {
        int anchor = g.TOP | g.LEFT;
        if (Main.landscape) {
            g.drawImage(backgroundLandscape, 0, 0, anchor);
            g.drawImage(shaderLandscape, 0, 0, anchor);
        }
        else {
            g.drawImage(background, 0, -40, anchor);
            g.drawImage(shader, 0, 0, anchor);
        }

        startButton.render(g);
        settingsButton.render(g);
        exitButton.render(g);
    }

    private void setPositions() {
        if (Main.landscape) {
            startButton.setPositionRel(0.75f, 0.45f);
            settingsButton.setPositionRel(0.75f, 0.65f);
            exitButton.setPositionRel(0.75f, 0.85f);
        }
        else {
            startButton.setPositionRel(0.5f, 0.35f);
            settingsButton.setPositionRel(0.5f, 0.55f);
            exitButton.setPositionRel(0.5f, 0.75f);
        }
    }
}