标签：
这是“使用 C＃ 开发智能手机软件：推箱子”系列文章的第十一篇。在这篇文章中，介绍 Common/Env.cs 源程序文件。这个源程序文件中包含表示“工作环境”的密封类 Env 。也就是说，主程序中重要的变量都封装在这个类中，作为整个程序的“工作环境”。她还起着桥梁作用，其中两个字段：
using System;using System.Drawing;using System.Collections.Generic;namespace Skyiv.Ben.PushBox.Common
{
/// <summary>
/// 工作环境
/// </summary> sealed class Env : IDisposable { DataFile db; // 数据文件 ConfigFile cfg; // 配置文件 string errorMsg; // 错误信息 string debugMsg; // 调试信息 bool isReplay; // 是否正在回放 Action active; // 模式: 正常 新建 编辑 删除 byte pen; // 设计时的笔 Bitmap img; // 图形单元, 横向被均匀分为八份 Stack<Step> stack; // 历史路线, 用于后退功能 Size clientSize; // 工作区域尺寸(以像素为单位) Size boxSize; // 图形元素尺寸(以像素为单位) Point toPixel; // 将要到达的位置(以像素为单位) Point worker; // 当前工人位置(以单元格为单位) int pushSteps; // 推动着箱子走的步数 int levelOem; // 原来的关数,仅用于“菜单 -> 数据 -> 设计 -> 新建”放弃后恢复现场 public string ErrorMsg { get { return errorMsg; } } public string DebugMsg { get { return debugMsg; } } public string[] Groups { get { return cfg.Groups; } } public int Group { get { return cfg.Group; } set { cfg.Group = value; } } public int Level { get { return cfg.Levels[Group]; } set { cfg.Levels[Group] = value; } } public int LeveLOem { get { return levelOem; } } public int MaxLevel { get { return db.MaxLevel; } } public string Steps { get { return cfg.Steps; } } public Size LevelSize { get { return db.LevelSize; } } public Size ClientSize { set { clientSize = value; } } public Point ToPixel { set { toPixel = value; } } public int MaxLevelSize { get { return cfg.MaxLevelSize; } set { cfg.MaxLevelSize = value; } } public int StepDelay { get { return cfg.StepDelay; } set { cfg.StepDelay = value; } } public int ReplayDelay { get { return cfg.ReplayDelay; } set { cfg.ReplayDelay = value; } } public Action Active { get { return active; } set { active = value; } } public byte Pen { get { return pen; } set { pen = value; } } public bool HasError { get { return !string.IsNullOrEmpty(errorMsg); } } public bool HasWorker { get { return db.HasWorker; } } public bool CanUndo { get { return stack.Count != 0; } } public bool CanReplay { get { return db.IsFinished && !CanUndo; } } public bool IsSave { get { return cfg.IsSave; } set { cfg.IsSave = value; } } public bool IsFinish { get { return db.Tasks == db.Boths; } } public bool IsReplay { get { return isReplay; } set { isReplay = value; } } public bool IsDesign { get { return active != Action.None; } } public Env() { stack = new Stack<Step>(); cfg = new ConfigFile(); db = new DataFile(); Init(); } /// <summary> /// 状态栏信息 /// </summary> public string StatusMessage { get { return HasError ? "请点击“菜单 -> 帮助 -> 错误信息”" : string.Format( "{0} {1}/{2} {3} {4} {5} [{6}] {7}", (active == Action.Create) ? ‘+‘ : (active == Action.Edit) ? ‘=‘ : isReplay ? "|/-\\"[stack.Count % 4] : ‘>‘, Level + 1, MaxLevel, Pub.ToString(LevelSize), IsDesign ? string.Format("{0}={1}", db.Boxs, db.Slots) : string.Format("{0}/{1}", db.Boths, db.Tasks), IsDesign ? Block.GetPenName(pen) : string.Format("{0}({1})", stack.Count, pushSteps), IsDesign ? (active == Action.Create ? "新建" : "编辑") : db.IsFinished ? string.Format("{0}({1})", db.MovedSteps, db.PushedSteps) : string.Empty, db.GroupName); } } public void Dispose() { db.Dispose(); } public void Init() { active = Action.None; pen = Block.Land; stack.Clear(); SetExceptionMessage(null); } void SetExceptionMessage(Exception ex) { errorMsg = Pub.GetMessage(ex, false); debugMsg = Pub.GetMessage(ex, true); } /// <summary> /// 计算当使用标准箱子尺寸时主窗体客户区的尺寸 /// </summary> /// <param name="statusBarHeight">状态条的高度</param> /// <returns>客户区的尺寸</returns> public Size GetClientSize(int statusBarHeight) { int width = (Properties.Resources.PushBox24.Width / 8) * LevelSize.Width; int height = Properties.Resources.PushBox24.Height * LevelSize.Height + statusBarHeight; if (width < 240) width = 240; if (height < 48) height = 48; if (width > 1008) width = 1008; if (height > 672) height = 672; return new Size(width, height); } /// <summary> /// 根据客户区尺寸,计算箱子的尺寸,并相应设定要显示的图形单元 /// </summary> public void SetBoxInfo() { if (HasError) return; if (LevelSize.IsEmpty) return; int rX = clientSize.Width / LevelSize.Width; int rY = clientSize.Height / LevelSize.Height; int r = Math.Min(rX, rY); if (r >= 24) img = Properties.Resources.PushBox24; else if (r >= 20) img = Properties.Resources.PushBox20; else if (r >= 16) img = Properties.Resources.PushBox16; else img = Properties.Resources.PushBox12; boxSize = new Size(img.Height, img.Width / 8); } /// <summary> /// 装入配置文件 /// </summary> public void LoadConfig() { if (HasError) return; try { cfg.LoadConfig(); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 保存组信息到配置文件 /// </summary> /// <param name="groups">组信息</param> public void SaveConfig(string[] groups) { if (HasError) return; try { cfg.SaveConfig(groups); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 保存当前选项及当前走法到配置文件 /// </summary> public void SaveConfig() { if (HasError) return; try { cfg.SaveConfig(stack.ToArray()); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 装入当前组信息 /// </summary> public void LoadGroup() { if (HasError) return; try { db.LoadGroup(Groups[Group]); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 装入当前关信息 /// </summary> public void LoadLevel() { active = Action.None; if (HasError) return; try { db.LoadLevel(Level); worker = db.Worker; stack.Clear(); pushSteps = 0; isReplay = false; } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 新建一关 /// </summary> /// <param name="isCopy">是否复制当前关</param> /// <param name="size">新建关的尺寸</param> public void NewLevel(bool isCopy, Size size) { if (HasError) return; try { levelOem = Level; Level = MaxLevel; db.NewLevel(isCopy, size); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 给出通关步骤 /// </summary> /// <returns>通关步骤</returns> public string GetSteps() { string steps = ""; if (!HasError) { try { steps = db.GetSteps(Level); } catch (Exception ex) { SetExceptionMessage(ex); } } return steps; } /// <summary> /// 记录通关步骤 /// </summary> public void Record() { if (HasError) return; try { db.SaveLevel(Level, stack.ToArray(), pushSteps); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 保存设计数据 /// </summary> public void SaveDesign() { if (HasError) return; try { db.SaveDesign(active == Action.Create, Level); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 删除最后一关 /// </summary> public void DeleteLastLevel() { if (HasError) return; try { db.DeleteLastLevel(Level); } catch (Exception ex) { SetExceptionMessage(ex); } } /// <summary> /// 更新主窗体客户区 /// </summary> /// <param name="dc">画布</param> /// <param name="rectangle">要在其中绘画的矩形</param> public void Draw(Graphics dc, Rectangle rectangle) { if (HasError) return; Rectangle box = PixelToBox(rectangle); Rectangle box2 = new Rectangle(box.Left, box.Top, box.Width + 1, box.Height + 1); for (int i = 1; i <= LevelSize.Height; i++) { for (int j = 1; j <= LevelSize.Width; j++) { if (!box2.Contains(j, i)) continue; DrawBox(dc, j, i); } } } /// <summary> /// 绘制一个单元格 /// </summary> /// <param name="dc">画布</param> /// <param name="x">单元格的横坐标</param> /// <param name="y">单元格的纵坐标</param> void DrawBox(Graphics dc, int x, int y) { DrawBox(dc, db.Map[y, x], (x - 1) * boxSize.Width, (y - 1) * boxSize.Height); } /// <summary> /// 绘制一个单元格 /// </summary> /// <param name="dc">画布</param> /// <param name="idx">单元格的类型: 地 槽 墙 砖 箱子 工人</param> /// <param name="x">单元格的横坐标</param> /// <param name="y">单元格的纵坐标</param> void DrawBox(Graphics dc, int idx, int x, int y) { dc.DrawImage(img, x, y, new Rectangle(idx * boxSize.Width, 0, boxSize.Width, boxSize.Height), GraphicsUnit.Pixel); } /// <summary> /// 将单元格换算为像素 /// </summary> /// <param name="box">单元格矩形</param> /// <returns>像素矩形</returns> Rectangle BoxToPixel(Rectangle box) { return new Rectangle((box.Left - 1) * boxSize.Width, (box.Top - 1) * boxSize.Height, (box.Width + 1) * boxSize.Width, (box.Height + 1) * boxSize.Height); } /// <summary> /// 将像素换算为单元格 /// </summary> /// <param name="pixel">像素矩形</param> /// <returns>单元格矩形</returns> Rectangle PixelToBox(Rectangle pixel) { int x0 = pixel.Left / boxSize.Width + 1; int y0 = pixel.Top / boxSize.Height + 1; int x1 = (pixel.Right - 1) / boxSize.Width + 1; int y1 = (pixel.Bottom - 1) / boxSize.Height + 1; return new Rectangle(x0, y0, x1 - x0, y1 - y0); } /// <summary> /// 根据指定的对角顶点创建矩形 /// </summary> /// <param name="a">顶点</param> /// <param name="b">对角的顶点</param> /// <returns>所需要的矩形</returns> Rectangle GetRectangle(Point a, Point b) { return Rectangle.FromLTRB(Math.Min(a.X, b.X), Math.Min(a.Y, b.Y), Math.Max(a.X, b.X), Math.Max(a.Y, b.Y)); } /// <summary> /// 设计模式下,当鼠标点击时要采取的动作 /// </summary> /// <param name="invalid">输出:要重绘的区域</param> /// <returns>是否发生动作</returns> public bool Design(out Rectangle invalid) { invalid = Rectangle.Empty; Point to; if (!ValidClick(out to)) return false; db.UpdateCounts(to.X, to.Y, false); Block.Update(ref db.Map[to.Y, to.X], pen); db.UpdateCounts(to.X, to.Y, true); if (pen == Block.Man0 && HasWorker) pen = Block.Box0; invalid = BoxToPixel(GetRectangle(to, to)); return true; } /// <summary> /// 工人往指定方向前进一步(可能推着箱子) /// </summary> /// <param name="dir">前进的方向</param> /// <param name="isStop">“撤销”时是否停留</param> /// <param name="invalid">输出:要重绘的区域</param> /// <returns>是否成功</returns> public bool StepIt(Direction dir, bool isStop, out Rectangle invalid) { invalid = Rectangle.Empty; if (HasError) return false; if (Direction.None == dir) return false; Point p1 = worker; // 工人前进方向一步的位置 Point p2 = worker; // 箱子前进方向一步的位置 switch (dir) { case Direction.East: p1.X++; p2.X += 2; break; case Direction.South: p1.Y++; p2.Y += 2; break; case Direction.West: p1.X--; p2.X -= 2; break; case Direction.North: p1.Y--; p2.Y -= 2; break; } byte b1 = db.Map[p1.Y, p1.X]; // 工人前进方向一步位置上的东西 bool isBox = Block.IsBox(b1); // 是否推着箱子前进 if (!isBox && !Block.IsBlank(b1)) return false; // 如果没有推着箱子且前方不是空地则失败 if (isBox && !Block.IsBlank(db.Map[p2.Y, p2.X])) return false; // 如果推着箱子且箱子前方不是空地则失败 invalid = BoxToPixel(GetRectangle(worker, isBox ? p2 : p1)); // 要重绘的区域 stack.Push(new Step(dir, isBox, isStop)); // 记录走法步骤 Block.ManOut(ref db.Map[worker.Y, worker.X]); // 工人离开当前位置 Block.ManIn(ref db.Map[p1.Y, p1.X]); // 工人进入前方位置 if (isBox) { pushSteps++; // 更新推箱子步数 db.Boths += (db.Map[p2.Y, p2.X] - Block.Land) - (b1 - Block.Box0); // 更新已完成任务数 Block.BoxOut(ref db.Map[p1.Y, p1.X]); // 箱子离开当前位置 Block.BoxIn(ref db.Map[p2.Y, p2.X]); // 箱子进入前方位置 } worker = p1; // 更新工人位置 return true; // 工人成功前进一步(可能推着条子) } /// <summary> /// 工人后退一步(可能连带箱子一起后退) /// </summary> /// <param name="invalid">输出:要重绘的区域</param> /// <returns>是否完成“撤消”</returns> public bool Back(out Rectangle invalid) { invalid = Rectangle.Empty; if (HasError) return true; if (stack.Count == 0) return true; Step step = stack.Pop(); // 当前步骤 Point p1 = worker; // 工人后退方向一步的位置 Point p2 = worker; // 箱子的当前位置 switch (step.Direct) { case Direction.East: p1.X--; p2.X++; break; case Direction.South: p1.Y--; p2.Y++; break; case Direction.West: p1.X++; p2.X--; break; case Direction.North: p1.Y++; p2.Y--; break; } invalid = BoxToPixel(GetRectangle(p1, step.IsBox ? p2 : worker)); // 要重绘的区域 Block.ManOut(ref db.Map[worker.Y, worker.X]); // 工人离开当前位置 Block.ManIn(ref db.Map[p1.Y, p1.X]); // 工人进入后退方向一步的位置 if (step.IsBox) { Block.BoxOut(ref db.Map[p2.Y, p2.X]); // 箱子离开当前位置 Block.BoxIn(ref db.Map[worker.Y, worker.X]); // 箱子进入工人原来的位置 db.Boths += (db.Map[worker.Y, worker.X] - Block.Box0) - (db.Map[p2.Y, p2.X] - Block.Land); // 更新已完成任务数 pushSteps--; // 更新推箱子步数 } worker = p1; // 更新工人位置 return step.IsStop; // 是否完成“撤消” } /// <summary> /// 寻找一条将工人移动到鼠标点击的位置的路线 /// </summary> /// <returns>移动的路线</returns> public Queue<Direction> GetMoveInfo() { Point to; if (!CanTo(out to)) return null; return FindPath.Seek(db.Map, worker, to); } /// <summary> /// 给出将箱子推动到鼠标点击的位置所需的信息 /// </summary> /// <param name="dir">输出:工人移动的方向</param> /// <returns>工人移动的步数</returns> public int GetPushInfo(out Direction dir) { dir = Direction.None; if (HasError) return 0; Point to; // 目的地 if (!CanTo(out to)) return 0; // 无效的目的地 if (to.Y != worker.Y && to.X != worker.X) return 0; // 目的地和工人不在同一条直线上 int z0 = (to.Y == worker.Y) ? worker.X : worker.Y; int z9 = (to.Y == worker.Y) ? to.X : to.Y; if (to.Y == worker.Y) dir = (z9 > z0) ? Direction.East : Direction.West; else dir = (z9 > z0) ? Direction.South : Direction.North; int i0 = Math.Min(z9, z0); int i9 = Math.Max(z9, z0); int steps = i9 - i0; // 目的地和工人之间的距离 int boxs = 0; for (int i = i0 + 1; i < i9; i++) { byte bi = (to.Y == worker.Y) ? db.Map[worker.Y, i] : db.Map[i, worker.X]; if (Block.IsBox(bi)) boxs++; // 计算工人和目的地之间的箱子的个数 else if (!Block.IsBlank(bi)) boxs += 2; // “墙”和“砖”折算为两个箱子 } if (boxs > 1) return 0; // 最多只能推着一个箱子前进 return steps - boxs; // 工人移动的步数 } /// <summary> /// 检查鼠标点击位置是否可达, 并将像素换算为单元格 /// </summary> /// <param name="to">输出:换算后的位置</param> /// <returns>是否可达</returns> bool CanTo(out Point to) { if (!ValidClick(out to)) return false; if (!Block.IsMan(db.Map[worker.Y, worker.X])) throw new Exception("内部错误:工人的位置上不是工人"); if (!Block.IsBlank(db.Map[to.Y, to.X])) return false; // 目的地必须是“地”或“槽” if (to.Y == worker.Y && to.X == worker.X) return false; // 目的地不能是工人当前的位置 return true; // 目的地可达 } /// <summary> /// 检查鼠标点击位置是否有效, 并将像素换算为单元格 /// </summary> /// <param name="to">输出:换算后的位置</param> /// <returns>是否有效位置</returns> bool ValidClick(out Point to) { to = Point.Empty; if (HasError) return false; to.Y = toPixel.Y / boxSize.Height + 1; to.X = toPixel.X / boxSize.Width + 1; if (toPixel.X >= boxSize.Width * LevelSize.Width || toPixel.Y >= boxSize.Height * LevelSize.Height) return false; // 目的地超出当前关的有效范围 return true; // 目的地有效 } }
}版权声明：本文为博主http://www.zuiniusn.com 原创文章，未经博主允许不得转载。
标签：
原文地址：http://blog.csdn.net/u013141940/article/details/47066445
