source: 2013/30/DenisZ/CastleMaster/CastleMaster/CastleMaster/Units/UnitStore.cs @ 4694

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using CastleMaster.Players;
using CastleMaster.World;
using CastleMaster.Graphics;
using CastleMaster.Units.Mobs;
using CastleMaster.Guis;

namespace CastleMaster.Units
{
    public class UnitStore : Unit
    {
        public const int COINS_FOR_LUMBER = 2;
        private bool isDestroyed = false;
        private GuiStoreMenu menu;

        public UnitStore(Level level, Player owner)
            : base(level, owner)
        {
            width = 8 * Viewport.TILESIZE;
            depth = 8 * Viewport.TILESIZE;
            HasHealth = true;
            maxHealth = 400;
            immunityTime = 20;

            isSolid = true;

            renderOffset.X = 128;
            renderOffset.Y = 83;

            spriteSize.X = 240;
            spriteSize.Y = 147;
            screenRectOffset.Update(32, 0, spriteSize.X - 32, spriteSize.Y - 10);

            highlightOffset.X = spriteSize.X / 2 - 4;

            rectOffset.Update(-4 * Viewport.TILESIZE, -4 * Viewport.TILESIZE, 4 * Viewport.TILESIZE, 4 * Viewport.TILESIZE);

            menu = new GuiStoreMenu(Game.GuiManager, this);
        }

        public void SellWood()
        {
            if (Owner.LumberAmount >= 1)
            {
                Owner.LumberAmount--;
                Owner.CoinsAmount += COINS_FOR_LUMBER;
            }
        }

        public bool IsDestroyed { get { return isDestroyed; } }

        public override void OnFocus()
        {
            Game.GuiManager.AddGui(menu, true);
        }

        public override void OnFocusLost()
        {
            Game.GuiManager.RemoveGui(menu);
        }

        public override void OnRemoved()
        {
            int xTile = (int)(X / Viewport.TILESIZE);
            int zTile = (int)(Z / Viewport.TILESIZE);

            for (int x = xTile - 5; x <= xTile + 5; x++)
            {
                if (x < 0 || x >= level.Width) continue;
                for (int z = zTile - 5; z <= zTile + 5; z++)
                {
                    if (z < 0 || z >= level.Height) continue;

                    level.SetTile(x, z, 1);
                    level.SetData(x, z, 0);
                }
            }

            menu.Remove();
            level.RemoveUnit(this);
        }

        public override void Render(RenderHelper renderer)
        {
            base.Render(renderer);
            renderer.Render(ScreenPos, 0, 0, Resources.SPRITE_STORE, colorizer, Viewport.ZOOM);
        }
    }
}