source: 2013/27/TeemuM/Game/Game/Game/Game.cs @ 4420

using System;
using System.Collections.Generic;
using Jypeli;
using Jypeli.Assets;
using Jypeli.Controls;
using Jypeli.Effects;
using Jypeli.Widgets;

public class G : PhysicsGame
{
    public static G game;
    private IntMeter scoreboard;
    public Player player { get; private set; }
    private List<Zombie> enemies = new List<Zombie>();

    public override void Begin()
    {
        game = this;
        Mouse.IsCursorVisible = true;

        MultiSelectWindow menu = new MultiSelectWindow("TESTMODE", "Developer tools", "Start this thing", "Get me out of here");
        menu.DefaultCancel = 2;
        menu.AddItemHandler(0, delegate() { MessageDisplay.Add("Starting game..."); StartGame(); DeveloperCommand(); });
        menu.AddItemHandler(1, StartGame);
        menu.AddItemHandler(2, Exit);
        Add(menu);
    }

    private void DeveloperCommand()
    {
        IsPaused = true;
        InputWindow prompt = new InputWindow("");
        prompt.TextEntered += delegate(InputWindow p)
        {
            if (p.InputBox.Text.Length == 0) { IsPaused = false; return; }
            string[] commands = p.InputBox.Text.Split(' ');

            if (commands[0] == "money")
            {
                if (commands[1] == "add")
                {
                    MessageDisplay.Add("+$" + int.Parse(commands[2]));
                }
                else if (commands[1] == "reduce")
                {
                    MessageDisplay.Add("-$" + int.Parse(commands[2]));
                }
            }
            else if (commands[0] == "score")
            {
                if (commands[1] == "add")
                {
                    MessageDisplay.Add("+" + int.Parse(commands[2]));
                    Score(int.Parse(commands[2]));
                }
                else if (commands[1] == "reduce")
                {
                    MessageDisplay.Add("-" + int.Parse(commands[2]));
                    Score(int.Parse(commands[2]));
                }
            }
            else if (commands[0] == "level")
            {
                if (commands[1] == "up")
                {
                    MessageDisplay.Add("+" + int.Parse(commands[2]) + " levels");
                }
                else if (commands[1] == "down")
                {
                    MessageDisplay.Add("-" + int.Parse(commands[2]) + " levels");
                }
            }
            else if (commands[0] == "item")
            {
                if (player.GiveWeapon(commands[1]))
                {
                    MessageDisplay.Add("You got " + commands[1] + "!");
                }
                else
                {
                    MessageDisplay.Add("What " + commands[1] + "?");
                }
            }
            else if (commands[0] == "powerup")
            {
                if (player.PowerUp(commands[1], double.Parse(commands[2])))
                    MessageDisplay.Add("Activated " + commands[1] + " powerup");
                else
                    MessageDisplay.Add("No such powerup");
            }
            else if (commands[0] == "spawn")
            {
                if (commands[1] == "zombie")
                {
                    if (commands.Length > 2)
                    {
                        for (int i = 0; i < int.Parse(commands[2]); i++)
                            SpawnZombie();
                    } else { SpawnZombie(); }
                }
            }
            else if (commands[0] == "kill")
            {
                if (commands[1] == "enemies")
                {
                    KillAllEnemies();
                    MessageDisplay.Add("All enemies killed");
                }
            }
            else if (commands[0] == "exit")
            {
                Exit();
            }
            else { MessageDisplay.Add("Unknow command!"); }

            DeveloperCommand();
        };
        Add(prompt);
    }

    private void StartGame()
    {
        Keyboard.Listen(Key.Escape, ButtonState.Pressed, delegate() { PauseMenu(); }, null);
        Keyboard.Listen(Key.Tab, ButtonState.Pressed, DeveloperCommand, null);
        AddScoreMeter();

        player = new Player(50, 50, 1, true);
        Add(player);
        SpawnZombie();
    }

    public void Score(int changeValue)
    {
        scoreboard.Value += changeValue;
    }

    private void SpawnZombie()
    {
        Zombie zombie = new Zombie(50, 50, RandomGen.NextDouble(Level.Left, Level.Right), RandomGen.NextDouble(Level.Bottom, Level.Top), 100);
        enemies.Add(zombie);
        Add(zombie);
    }

    private void KillAllEnemies()
    {
        foreach (Zombie enemy in enemies)
        {
            enemy.Destroy();
        }
    }

    private void AddScoreMeter()
    {
        scoreboard = new IntMeter(0);
        Label ScoreScreen = new Label();
        ScoreScreen.X = 0;
        ScoreScreen.Y = Screen.Bottom + 100;
        ScoreScreen.TextColor = Color.Black;
        ScoreScreen.Color = Color.White;
        ScoreScreen.BindTo(scoreboard);
        Add(ScoreScreen);
    }

    private void SaveAndBackToMenu() //ToDo: Save
    {
        ClearAll();
        MessageDisplay.Add("Saved!");
        Begin();
    }

    public void PauseMenu()
    {
        MultiSelectWindow menu = new MultiSelectWindow("Pause Menu", "Resume Game", "Back to Menu", "Exit Game");
        menu.DefaultCancel = 0;
        menu.AddItemHandler(0, delegate { IsPaused = false; });
        menu.AddItemHandler(1, SaveAndBackToMenu);
        menu.AddItemHandler(2, Exit);
        Add(menu);
        IsPaused = true;
    }
}