Delphi 设计模式:《HeadFirst设计模式》Delphi7代码---门面模式之HomeTheater
Posted on 2009-05-24 18:46 都市牧羊 阅读(685) 评论(0) 编辑 收藏 举报复杂的子系统
1unit uSubObject;
2
3interface
4
5type
6
7 { TAmplifier与TTuner,TCDPlayer,TDVDPlayer相互依赖。 }
8 { 在TTuner等的简单实现时用不到对TAmplifier的引用, }
9 { 但现实生活中就应该让TAmplifier提供服务,所以这里保留了。 }
10 { TProjector对TDVDPlayer的引用也是同样道理。 }
11 { 前置TAmplifier也可以,把TAmplifier的声明放在TTuner等声明的后面 }
12
13 TTuner = class;
14 TCDPlayer = class;
15 TDVDPlayer = class;
16
17 TAmplifier = class(TObject)
18 private
19 FTuner: TTuner;
20 FCD : TCDPlayer;
21 FDVD: TDVDPlayer;
22 FDescription: String;
23 public
24 constructor Create(aDescription: String);
25 procedure Open;
26 procedure Off;
27 procedure SetStereoSound;
28 procedure SetSurroundSound;
29 procedure SetVolume(aLevel: Integer);
30 procedure SetTuner (aTuner: TTuner);
31 procedure SetCD (aCD : TCDPlayer);
32 procedure SetDVD(aDVD: TDVDPlayer);
33 function ToString: String;
34 end;
35
36 TTuner = class(TObject)
37 private
38 FAmplifier: TAmplifier;
39 FDescription: String;
40 FFrequency: Double;
41 public
42 constructor Create(aDescription: String; aAmplifier: TAmplifier);
43 procedure Open;
44 procedure Off;
45 procedure SetAm;
46 procedure SetFm;
47 procedure SetFrequency(aFrequency: Double);
48 function ToString: String;
49 end;
50
51 TCDPlayer = class(TObject)
52 private
53 FAmplifier: TAmplifier;
54 FDescription: String;
55 FCurrentTrack: Integer;
56 FTitle: String;
57 public
58 constructor Create(aDescription: String; aAmplifier: TAmplifier);
59 procedure Open;
60 procedure Off;
61 procedure Eject;
62 procedure Play(aTitle: String ); overload;
63 procedure Play(aTrack: Integer); overload;
64 procedure Stop;
65 procedure Pause;
66 function ToString: String;
67 end;
68
69 TDVDPlayer = class(TObject)
70 private
71 FAmplifier: TAmplifier;
72 FDescription: String;
73 FCurrentTrack: Integer;
74 FMovie: String;
75 public
76 constructor Create(aDescription: String; aAmplifier: TAmplifier);
77 procedure Open;
78 procedure Off;
79 procedure Eject;
80 procedure Play(aMovie: String ); overload;
81 procedure Play(aTrack: Integer); overload;
82 procedure Stop;
83 procedure Pause;
84 procedure SetTwoChannelAudio;
85 procedure SetSurroundAudio;
86 function ToString: String;
87 end;
88
89 TScreen = class(TObject)
90 private
91 FDescription: String;
92 public
93 constructor Create(aDescription: String);
94 procedure UP;
95 procedure Down;
96 function ToString: String;
97 end;
98
99 TPopcornPopper = class(TObject)
100 private
101 FDescription: String;
102 public
103 constructor Create(aDescription: String);
104 procedure Open;
105 procedure Off;
106 procedure Pop;
107 function ToString: String;
108 end;
109
110 TTheaterLights = class(TObject)
111 private
112 FDescription: String;
113 public
114 constructor Create(aDescription: String);
115 procedure Open;
116 procedure Off;
117 procedure Dim(aLevel: Integer);
118 function ToString: String;
119 end;
120
121 TProjector = class(TObject)
122 private
123 FDescription: String;
124 FDVD: TDVDPlayer;
125 public
126 constructor Create(aDescription: String; aDVD: TDVDPlayer);
127 procedure Open;
128 procedure Off;
129 procedure WideScreenMode;
130 procedure TVMode;
131 function ToString: String;
132 end;
133
134implementation
135
136{ TAmplifier }
137
138constructor TAmplifier.Create(aDescription: String);
139begin
140 FDescription := aDescription;
141end;
142
143procedure TAmplifier.Off;
144begin
145 Writeln(FDescription + ' off');
146end;
147
148procedure TAmplifier.Open;
149begin
150 Writeln(FDescription + ' on');
151end;
152
153procedure TAmplifier.SetCD(aCD: TCDPlayer);
154begin
155 Writeln(FDescription + ' setting CD player to ' + aCD.ToString);
156 FCD := aCD;
157end;
158
159procedure TAmplifier.SetDVD(aDVD: TDVDPlayer);
160begin
161 Writeln(FDescription + ' setting DVD player to ' + aDVD.ToString);
162 FDVD := aDVD;
163end;
164
165procedure TAmplifier.SetStereoSound;
166begin
167 Writeln(FDescription + ' stereo mode on');
168end;
169
170procedure TAmplifier.SetSurroundSound;
171begin
172 Writeln(FDescription + ' surround sound on (5 speakers, 1 subwoofer)');
173end;
174
175procedure TAmplifier.SetTuner(aTuner: TTuner);
176begin
177 Writeln(FDescription + ' setting Tuner player to ', aTuner.ToString);
178 FTuner := aTuner;
179end;
180
181procedure TAmplifier.SetVolume(aLevel: Integer);
182begin
183 Writeln(FDescription + ' setting volume to ' , aLevel);
184end;
185
186function TAmplifier.ToString: String;
187begin
188 Result := FDescription;
189end;
190
191{ TTuner }
192
193constructor TTuner.Create(aDescription: String; aAmplifier: TAmplifier);
194begin
195 FDescription := aDescription;
196 FAmplifier := aAmplifier;
197end;
198
199procedure TTuner.Off;
200begin
201 Writeln(FDescription + ' off');
202end;
203
204procedure TTuner.Open;
205begin
206 Writeln(FDescription + ' on');
207end;
208
209procedure TTuner.SetAm;
210begin
211 Writeln(FDescription + ' setting AM mode');
212end;
213
214procedure TTuner.SetFm;
215begin
216 Writeln(FDescription + ' setting FM mode');
217end;
218
219procedure TTuner.SetFrequency(aFrequency: Double);
220begin
221 Writeln(FDescription + ' setting frequency to ', aFrequency);
222 FFrequency := aFrequency;
223end;
224
225function TTuner.ToString: String;
226begin
227 Result := FDescription;
228end;
229
230{ TCDPlayer }
231
232constructor TCDPlayer.Create(aDescription: String; aAmplifier: TAmplifier);
233begin
234 FDescription := aDescription;
235 FAmplifier := aAmplifier;
236end;
237
238procedure TCDPlayer.Eject;
239begin
240 FTitle := '';
241 Writeln(FDescription + ' eject');
242end;
243
244procedure TCDPlayer.Off;
245begin
246 Writeln(FDescription + ' off');
247end;
248
249procedure TCDPlayer.Open;
250begin
251 Writeln(FDescription + ' on');
252end;
253
254procedure TCDPlayer.Pause;
255begin
256 Writeln(FDescription + ' paused <' + FTitle + '>');
257end;
258
259procedure TCDPlayer.Play(aTitle: String);
260begin
261 FTitle := aTitle;
262 FCurrentTrack := 0;
263 Writeln(FDescription + ' playing <' + FTitle + '>');
264end;
265
266procedure TCDPlayer.Play(aTrack: Integer);
267begin
268 if FTitle = '' then
269 begin
270 Writeln(FDescription + ' can'' t play track ', aTrack, ', no CD inserted');
271 end
272 else
273 begin
274 FCurrentTrack := aTrack;
275 Writeln(FDescription + ' playing track ', FCurrentTrack);
276 end;
277end;
278
279procedure TCDPlayer.Stop;
280begin
281 FCurrentTrack := 0;
282 Writeln(FDescription + ' stopped');
283end;
284
285function TCDPlayer.ToString: String;
286begin
287 Result := FDescription;
288end;
289
290{ TDVDPlayer }
291
292constructor TDVDPlayer.Create(aDescription: String; aAmplifier: TAmplifier);
293begin
294 FDescription := aDescription;
295 FAmplifier := aAmplifier;
296end;
297
298procedure TDVDPlayer.Eject;
299begin
300 Writeln(FDescription + ' eject');
301end;
302
303procedure TDVDPlayer.Off;
304begin
305 Writeln(FDescription + ' off');
306end;
307
308procedure TDVDPlayer.Open;
309begin
310 Writeln(FDescription + ' on');
311end;
312
313procedure TDVDPlayer.Pause;
314begin
315 Writeln(FDescription + ' paused <' + FMovie + '>');
316end;
317
318procedure TDVDPlayer.Play(aTrack: Integer);
319begin
320 if FMovie = '' then
321 begin
322 Writeln(FDescription + ' can'' t play track ', aTrack, ', no DVD inserted');
323 end
324 else
325 begin
326 FCurrentTrack := aTrack;
327 Writeln(FDescription + ' playing track ', FCurrentTrack, ' of <', FMovie, '>');
328 end;
329end;
330
331procedure TDVDPlayer.Play(aMovie: String);
332begin
333 FMovie := aMovie;
334 FCurrentTrack := 0;
335 Writeln(FDescription + ' playing <' + FMovie + '>');
336end;
337
338procedure TDVDPlayer.SetSurroundAudio;
339begin
340 Writeln(FDescription + ' set surround audio');
341end;
342
343procedure TDVDPlayer.SetTwoChannelAudio;
344begin
345 Writeln(FDescription + ' set two channel audio');
346end;
347
348procedure TDVDPlayer.Stop;
349begin
350 FCurrentTrack := 0;
351 Writeln(FDescription + ' <' + FMovie + '> stopped');
352end;
353
354function TDVDPlayer.ToString: String;
355begin
356 Result := FDescription;
357end;
358
359{ TScreen }
360
361constructor TScreen.Create(aDescription: String);
362begin
363 FDescription := aDescription;
364end;
365
366procedure TScreen.Down;
367begin
368 Writeln(FDescription, ' going down');
369end;
370
371function TScreen.ToString: String;
372begin
373 Result := FDescription;
374end;
375
376procedure TScreen.UP;
377begin
378 Writeln(FDescription, ' going up');
379end;
380
381{ TPopcornPopper }
382
383constructor TPopcornPopper.Create(aDescription: String);
384begin
385 FDescription := aDescription;
386end;
387
388procedure TPopcornPopper.Off;
389begin
390 Writeln(FDescription, ' off');
391end;
392
393procedure TPopcornPopper.Open;
394begin
395 Writeln(FDescription, ' on');
396end;
397
398procedure TPopcornPopper.Pop;
399begin
400 Writeln(FDescription, ' popping popcorn!');
401end;
402
403function TPopcornPopper.ToString: String;
404begin
405 Result := FDescription;
406end;
407
408{ TTheaterLights }
409
410constructor TTheaterLights.Create(aDescription: String);
411begin
412 FDescription := aDescription;
413end;
414
415procedure TTheaterLights.Dim(aLevel: Integer);
416begin
417 Writeln(FDescription, ' dimming to ', aLevel, '%');
418end;
419
420procedure TTheaterLights.Off;
421begin
422 Writeln(FDescription, ' off');
423end;
424
425procedure TTheaterLights.Open;
426begin
427 Writeln(FDescription, ' on');
428end;
429
430function TTheaterLights.ToString: String;
431begin
432 Result := FDescription;
433end;
434
435{ TProjector }
436
437constructor TProjector.Create(aDescription: String; aDVD: TDVDPlayer);
438begin
439 FDescription := aDescription;
440 FDVD := aDVD;
441end;
442
443procedure TProjector.Off;
444begin
445 Writeln(FDescription, ' off');
446end;
447
448procedure TProjector.Open;
449begin
450 Writeln(FDescription, ' on');
451end;
452
453function TProjector.ToString: String;
454begin
455 Result := FDescription;
456end;
457
458procedure TProjector.TVMode;
459begin
460 Writeln(FDescription + ' in tv mode (4x3 aspect ratio)');
461end;
462
463procedure TProjector.WideScreenMode;
464begin
465 Writeln(FDescription + ' in widescreen mode (16x9 aspect ratio)');
466end;
467
468end.
1unit uSubObject;
2
3interface
4
5type
6
7 { TAmplifier与TTuner,TCDPlayer,TDVDPlayer相互依赖。 }
8 { 在TTuner等的简单实现时用不到对TAmplifier的引用, }
9 { 但现实生活中就应该让TAmplifier提供服务,所以这里保留了。 }
10 { TProjector对TDVDPlayer的引用也是同样道理。 }
11 { 前置TAmplifier也可以,把TAmplifier的声明放在TTuner等声明的后面 }
12
13 TTuner = class;
14 TCDPlayer = class;
15 TDVDPlayer = class;
16
17 TAmplifier = class(TObject)
18 private
19 FTuner: TTuner;
20 FCD : TCDPlayer;
21 FDVD: TDVDPlayer;
22 FDescription: String;
23 public
24 constructor Create(aDescription: String);
25 procedure Open;
26 procedure Off;
27 procedure SetStereoSound;
28 procedure SetSurroundSound;
29 procedure SetVolume(aLevel: Integer);
30 procedure SetTuner (aTuner: TTuner);
31 procedure SetCD (aCD : TCDPlayer);
32 procedure SetDVD(aDVD: TDVDPlayer);
33 function ToString: String;
34 end;
35
36 TTuner = class(TObject)
37 private
38 FAmplifier: TAmplifier;
39 FDescription: String;
40 FFrequency: Double;
41 public
42 constructor Create(aDescription: String; aAmplifier: TAmplifier);
43 procedure Open;
44 procedure Off;
45 procedure SetAm;
46 procedure SetFm;
47 procedure SetFrequency(aFrequency: Double);
48 function ToString: String;
49 end;
50
51 TCDPlayer = class(TObject)
52 private
53 FAmplifier: TAmplifier;
54 FDescription: String;
55 FCurrentTrack: Integer;
56 FTitle: String;
57 public
58 constructor Create(aDescription: String; aAmplifier: TAmplifier);
59 procedure Open;
60 procedure Off;
61 procedure Eject;
62 procedure Play(aTitle: String ); overload;
63 procedure Play(aTrack: Integer); overload;
64 procedure Stop;
65 procedure Pause;
66 function ToString: String;
67 end;
68
69 TDVDPlayer = class(TObject)
70 private
71 FAmplifier: TAmplifier;
72 FDescription: String;
73 FCurrentTrack: Integer;
74 FMovie: String;
75 public
76 constructor Create(aDescription: String; aAmplifier: TAmplifier);
77 procedure Open;
78 procedure Off;
79 procedure Eject;
80 procedure Play(aMovie: String ); overload;
81 procedure Play(aTrack: Integer); overload;
82 procedure Stop;
83 procedure Pause;
84 procedure SetTwoChannelAudio;
85 procedure SetSurroundAudio;
86 function ToString: String;
87 end;
88
89 TScreen = class(TObject)
90 private
91 FDescription: String;
92 public
93 constructor Create(aDescription: String);
94 procedure UP;
95 procedure Down;
96 function ToString: String;
97 end;
98
99 TPopcornPopper = class(TObject)
100 private
101 FDescription: String;
102 public
103 constructor Create(aDescription: String);
104 procedure Open;
105 procedure Off;
106 procedure Pop;
107 function ToString: String;
108 end;
109
110 TTheaterLights = class(TObject)
111 private
112 FDescription: String;
113 public
114 constructor Create(aDescription: String);
115 procedure Open;
116 procedure Off;
117 procedure Dim(aLevel: Integer);
118 function ToString: String;
119 end;
120
121 TProjector = class(TObject)
122 private
123 FDescription: String;
124 FDVD: TDVDPlayer;
125 public
126 constructor Create(aDescription: String; aDVD: TDVDPlayer);
127 procedure Open;
128 procedure Off;
129 procedure WideScreenMode;
130 procedure TVMode;
131 function ToString: String;
132 end;
133
134implementation
135
136{ TAmplifier }
137
138constructor TAmplifier.Create(aDescription: String);
139begin
140 FDescription := aDescription;
141end;
142
143procedure TAmplifier.Off;
144begin
145 Writeln(FDescription + ' off');
146end;
147
148procedure TAmplifier.Open;
149begin
150 Writeln(FDescription + ' on');
151end;
152
153procedure TAmplifier.SetCD(aCD: TCDPlayer);
154begin
155 Writeln(FDescription + ' setting CD player to ' + aCD.ToString);
156 FCD := aCD;
157end;
158
159procedure TAmplifier.SetDVD(aDVD: TDVDPlayer);
160begin
161 Writeln(FDescription + ' setting DVD player to ' + aDVD.ToString);
162 FDVD := aDVD;
163end;
164
165procedure TAmplifier.SetStereoSound;
166begin
167 Writeln(FDescription + ' stereo mode on');
168end;
169
170procedure TAmplifier.SetSurroundSound;
171begin
172 Writeln(FDescription + ' surround sound on (5 speakers, 1 subwoofer)');
173end;
174
175procedure TAmplifier.SetTuner(aTuner: TTuner);
176begin
177 Writeln(FDescription + ' setting Tuner player to ', aTuner.ToString);
178 FTuner := aTuner;
179end;
180
181procedure TAmplifier.SetVolume(aLevel: Integer);
182begin
183 Writeln(FDescription + ' setting volume to ' , aLevel);
184end;
185
186function TAmplifier.ToString: String;
187begin
188 Result := FDescription;
189end;
190
191{ TTuner }
192
193constructor TTuner.Create(aDescription: String; aAmplifier: TAmplifier);
194begin
195 FDescription := aDescription;
196 FAmplifier := aAmplifier;
197end;
198
199procedure TTuner.Off;
200begin
201 Writeln(FDescription + ' off');
202end;
203
204procedure TTuner.Open;
205begin
206 Writeln(FDescription + ' on');
207end;
208
209procedure TTuner.SetAm;
210begin
211 Writeln(FDescription + ' setting AM mode');
212end;
213
214procedure TTuner.SetFm;
215begin
216 Writeln(FDescription + ' setting FM mode');
217end;
218
219procedure TTuner.SetFrequency(aFrequency: Double);
220begin
221 Writeln(FDescription + ' setting frequency to ', aFrequency);
222 FFrequency := aFrequency;
223end;
224
225function TTuner.ToString: String;
226begin
227 Result := FDescription;
228end;
229
230{ TCDPlayer }
231
232constructor TCDPlayer.Create(aDescription: String; aAmplifier: TAmplifier);
233begin
234 FDescription := aDescription;
235 FAmplifier := aAmplifier;
236end;
237
238procedure TCDPlayer.Eject;
239begin
240 FTitle := '';
241 Writeln(FDescription + ' eject');
242end;
243
244procedure TCDPlayer.Off;
245begin
246 Writeln(FDescription + ' off');
247end;
248
249procedure TCDPlayer.Open;
250begin
251 Writeln(FDescription + ' on');
252end;
253
254procedure TCDPlayer.Pause;
255begin
256 Writeln(FDescription + ' paused <' + FTitle + '>');
257end;
258
259procedure TCDPlayer.Play(aTitle: String);
260begin
261 FTitle := aTitle;
262 FCurrentTrack := 0;
263 Writeln(FDescription + ' playing <' + FTitle + '>');
264end;
265
266procedure TCDPlayer.Play(aTrack: Integer);
267begin
268 if FTitle = '' then
269 begin
270 Writeln(FDescription + ' can'' t play track ', aTrack, ', no CD inserted');
271 end
272 else
273 begin
274 FCurrentTrack := aTrack;
275 Writeln(FDescription + ' playing track ', FCurrentTrack);
276 end;
277end;
278
279procedure TCDPlayer.Stop;
280begin
281 FCurrentTrack := 0;
282 Writeln(FDescription + ' stopped');
283end;
284
285function TCDPlayer.ToString: String;
286begin
287 Result := FDescription;
288end;
289
290{ TDVDPlayer }
291
292constructor TDVDPlayer.Create(aDescription: String; aAmplifier: TAmplifier);
293begin
294 FDescription := aDescription;
295 FAmplifier := aAmplifier;
296end;
297
298procedure TDVDPlayer.Eject;
299begin
300 Writeln(FDescription + ' eject');
301end;
302
303procedure TDVDPlayer.Off;
304begin
305 Writeln(FDescription + ' off');
306end;
307
308procedure TDVDPlayer.Open;
309begin
310 Writeln(FDescription + ' on');
311end;
312
313procedure TDVDPlayer.Pause;
314begin
315 Writeln(FDescription + ' paused <' + FMovie + '>');
316end;
317
318procedure TDVDPlayer.Play(aTrack: Integer);
319begin
320 if FMovie = '' then
321 begin
322 Writeln(FDescription + ' can'' t play track ', aTrack, ', no DVD inserted');
323 end
324 else
325 begin
326 FCurrentTrack := aTrack;
327 Writeln(FDescription + ' playing track ', FCurrentTrack, ' of <', FMovie, '>');
328 end;
329end;
330
331procedure TDVDPlayer.Play(aMovie: String);
332begin
333 FMovie := aMovie;
334 FCurrentTrack := 0;
335 Writeln(FDescription + ' playing <' + FMovie + '>');
336end;
337
338procedure TDVDPlayer.SetSurroundAudio;
339begin
340 Writeln(FDescription + ' set surround audio');
341end;
342
343procedure TDVDPlayer.SetTwoChannelAudio;
344begin
345 Writeln(FDescription + ' set two channel audio');
346end;
347
348procedure TDVDPlayer.Stop;
349begin
350 FCurrentTrack := 0;
351 Writeln(FDescription + ' <' + FMovie + '> stopped');
352end;
353
354function TDVDPlayer.ToString: String;
355begin
356 Result := FDescription;
357end;
358
359{ TScreen }
360
361constructor TScreen.Create(aDescription: String);
362begin
363 FDescription := aDescription;
364end;
365
366procedure TScreen.Down;
367begin
368 Writeln(FDescription, ' going down');
369end;
370
371function TScreen.ToString: String;
372begin
373 Result := FDescription;
374end;
375
376procedure TScreen.UP;
377begin
378 Writeln(FDescription, ' going up');
379end;
380
381{ TPopcornPopper }
382
383constructor TPopcornPopper.Create(aDescription: String);
384begin
385 FDescription := aDescription;
386end;
387
388procedure TPopcornPopper.Off;
389begin
390 Writeln(FDescription, ' off');
391end;
392
393procedure TPopcornPopper.Open;
394begin
395 Writeln(FDescription, ' on');
396end;
397
398procedure TPopcornPopper.Pop;
399begin
400 Writeln(FDescription, ' popping popcorn!');
401end;
402
403function TPopcornPopper.ToString: String;
404begin
405 Result := FDescription;
406end;
407
408{ TTheaterLights }
409
410constructor TTheaterLights.Create(aDescription: String);
411begin
412 FDescription := aDescription;
413end;
414
415procedure TTheaterLights.Dim(aLevel: Integer);
416begin
417 Writeln(FDescription, ' dimming to ', aLevel, '%');
418end;
419
420procedure TTheaterLights.Off;
421begin
422 Writeln(FDescription, ' off');
423end;
424
425procedure TTheaterLights.Open;
426begin
427 Writeln(FDescription, ' on');
428end;
429
430function TTheaterLights.ToString: String;
431begin
432 Result := FDescription;
433end;
434
435{ TProjector }
436
437constructor TProjector.Create(aDescription: String; aDVD: TDVDPlayer);
438begin
439 FDescription := aDescription;
440 FDVD := aDVD;
441end;
442
443procedure TProjector.Off;
444begin
445 Writeln(FDescription, ' off');
446end;
447
448procedure TProjector.Open;
449begin
450 Writeln(FDescription, ' on');
451end;
452
453function TProjector.ToString: String;
454begin
455 Result := FDescription;
456end;
457
458procedure TProjector.TVMode;
459begin
460 Writeln(FDescription + ' in tv mode (4x3 aspect ratio)');
461end;
462
463procedure TProjector.WideScreenMode;
464begin
465 Writeln(FDescription + ' in widescreen mode (16x9 aspect ratio)');
466end;
467
468end.
简洁的门面接口
1unit uFacadeObject;
2
3interface
4
5uses
6 uSubObject;
7
8type
9 THomeTheaterFacade = class(TObject)
10 private
11 FAmp: TAmplifier;
12 FTuner: TTuner;
13 FDVD: TDVDPlayer;
14 FCD: TCDPlayer;
15 FProjector: TProjector;
16 FLights: TTheaterLights;
17 FScreen: TScreen;
18 FPopper: TPopcornPopper;
19 public
20 constructor Create(aAmp : TAmplifier;
21 aTuner : TTuner;
22 aDVD : TDVDPlayer;
23 aCD : TCDPlayer;
24 aProjector: TProjector;
25 aLights: TTheaterLights;
26 aScreen: TScreen;
27 aPopper: TPopcornPopper);
28 procedure WatchMovie(aMovie: String);
29 procedure EndMovie;
30 procedure ListenToCD(CDTitle: String);
31 procedure EndCD;
32 procedure ListenToRadio(aFrequency: Double);
33 procedure EndRadio;
34 end;
35
36implementation
37
38{ THomeTheaterFacade }
39
40constructor THomeTheaterFacade.Create(aAmp : TAmplifier;
41 aTuner : TTuner;
42 aDVD : TDVDPlayer;
43 aCD : TCDPlayer;
44 aProjector: TProjector;
45 aLights: TTheaterLights;
46 aScreen: TScreen;
47 aPopper: TPopcornPopper);
48begin
49 FAmp := aAmp;
50 FTuner := aTuner;
51 FDVD := aDVD;
52 FCD := aCD;
53 FProjector := aProjector;
54 FLights := aLights;
55 FScreen := aScreen;
56 FPopper := aPopper;
57end;
58
59procedure THomeTheaterFacade.EndCD;
60begin
61 Writeln('Shutting down CD');
62 FAmp.Off;
63 FAmp.SetCD(FCD);
64 FCD.Eject;
65 FCD.Off;
66end;
67
68procedure THomeTheaterFacade.EndMovie;
69begin
70 Writeln('Shutting movie theater down');
71 FPopper.Off;
72 FLights.Open;
73 FScreen.UP;
74 FProjector.Off;
75 FAmp.Off;
76 FDVD.Stop;
77 FDVD.Eject;
78 FDVD.Off;
79end;
80
81procedure THomeTheaterFacade.EndRadio;
82begin
83 Writeln('Shutting down the tuner');
84 FTuner.Off;
85 FAmp.Off;
86end;
87
88procedure THomeTheaterFacade.ListenToCD(CDTitle: String);
89begin
90 Writeln('Get ready for an audiopile experence');
91 FLights.Open;
92 FAmp.Open;
93 FAmp.SetVolume(5);
94 FAmp.SetCD(FCD);
95 FAmp.SetStereoSound;
96 FCD.Open;
97 FCD.Play(CDTitle);
98end;
99
100procedure THomeTheaterFacade.ListenToRadio(aFrequency: Double);
101begin
102 Writeln('Tuning in the airwaves');
103 FTuner.Open;
104 FTuner.SetFrequency(aFrequency);
105 FAmp.Open;
106 FAmp.SetVolume(5);
107 FAmp.SetTuner(FTuner);
108end;
109
110procedure THomeTheaterFacade.WatchMovie(aMovie: String);
111begin
112 Writeln('Get ready to watch a movie');
113 FPopper.Open;
114 FPopper.Pop;
115 FLights.Dim(10);
116 FScreen.Down;
117 FProjector.Open;
118 FProjector.WideScreenMode;
119 FAmp.Open;
120 FAmp.SetDVD(FDVD);
121 FAmp.SetSurroundSound;
122 FAmp.SetVolume(5);
123 FDVD.Open;
124 FDVD.Play(aMovie);
125end;
126
127end.
1unit uFacadeObject;
2
3interface
4
5uses
6 uSubObject;
7
8type
9 THomeTheaterFacade = class(TObject)
10 private
11 FAmp: TAmplifier;
12 FTuner: TTuner;
13 FDVD: TDVDPlayer;
14 FCD: TCDPlayer;
15 FProjector: TProjector;
16 FLights: TTheaterLights;
17 FScreen: TScreen;
18 FPopper: TPopcornPopper;
19 public
20 constructor Create(aAmp : TAmplifier;
21 aTuner : TTuner;
22 aDVD : TDVDPlayer;
23 aCD : TCDPlayer;
24 aProjector: TProjector;
25 aLights: TTheaterLights;
26 aScreen: TScreen;
27 aPopper: TPopcornPopper);
28 procedure WatchMovie(aMovie: String);
29 procedure EndMovie;
30 procedure ListenToCD(CDTitle: String);
31 procedure EndCD;
32 procedure ListenToRadio(aFrequency: Double);
33 procedure EndRadio;
34 end;
35
36implementation
37
38{ THomeTheaterFacade }
39
40constructor THomeTheaterFacade.Create(aAmp : TAmplifier;
41 aTuner : TTuner;
42 aDVD : TDVDPlayer;
43 aCD : TCDPlayer;
44 aProjector: TProjector;
45 aLights: TTheaterLights;
46 aScreen: TScreen;
47 aPopper: TPopcornPopper);
48begin
49 FAmp := aAmp;
50 FTuner := aTuner;
51 FDVD := aDVD;
52 FCD := aCD;
53 FProjector := aProjector;
54 FLights := aLights;
55 FScreen := aScreen;
56 FPopper := aPopper;
57end;
58
59procedure THomeTheaterFacade.EndCD;
60begin
61 Writeln('Shutting down CD');
62 FAmp.Off;
63 FAmp.SetCD(FCD);
64 FCD.Eject;
65 FCD.Off;
66end;
67
68procedure THomeTheaterFacade.EndMovie;
69begin
70 Writeln('Shutting movie theater down');
71 FPopper.Off;
72 FLights.Open;
73 FScreen.UP;
74 FProjector.Off;
75 FAmp.Off;
76 FDVD.Stop;
77 FDVD.Eject;
78 FDVD.Off;
79end;
80
81procedure THomeTheaterFacade.EndRadio;
82begin
83 Writeln('Shutting down the tuner');
84 FTuner.Off;
85 FAmp.Off;
86end;
87
88procedure THomeTheaterFacade.ListenToCD(CDTitle: String);
89begin
90 Writeln('Get ready for an audiopile experence');
91 FLights.Open;
92 FAmp.Open;
93 FAmp.SetVolume(5);
94 FAmp.SetCD(FCD);
95 FAmp.SetStereoSound;
96 FCD.Open;
97 FCD.Play(CDTitle);
98end;
99
100procedure THomeTheaterFacade.ListenToRadio(aFrequency: Double);
101begin
102 Writeln('Tuning in the airwaves');
103 FTuner.Open;
104 FTuner.SetFrequency(aFrequency);
105 FAmp.Open;
106 FAmp.SetVolume(5);
107 FAmp.SetTuner(FTuner);
108end;
109
110procedure THomeTheaterFacade.WatchMovie(aMovie: String);
111begin
112 Writeln('Get ready to watch a movie');
113 FPopper.Open;
114 FPopper.Pop;
115 FLights.Dim(10);
116 FScreen.Down;
117 FProjector.Open;
118 FProjector.WideScreenMode;
119 FAmp.Open;
120 FAmp.SetDVD(FDVD);
121 FAmp.SetSurroundSound;
122 FAmp.SetVolume(5);
123 FDVD.Open;
124 FDVD.Play(aMovie);
125end;
126
127end.
客户端
1program pHomeTheaterTestDrive;
2
3{$APPTYPE CONSOLE}
4
5uses
6 SysUtils,
7 uFacadeObject in 'uFacadeObject.pas',
8 uSubObject in 'uSubObject.pas';
9
10var
11 Amp : TAmplifier;
12 Tuner : TTuner;
13 DVD : TDVDPlayer;
14 CD : TCDPlayer;
15 Projector: TProjector;
16 Lights: TTheaterLights;
17 Screen: TScreen;
18 Popper: TPopcornPopper;
19
20 HomeTheater: THomeTheaterFacade;
21
22begin
23 Amp := TAmplifier.Create('Top-O-Line Amplifier');
24 Tuner := TTuner.Create('Top-O-Line AM/FM Tuner', Amp);
25 DVD := TDVDPlayer.Create('Top-O-Line DVD Player', Amp);
26 CD := TCDPlayer.Create('Top-O-Line CD Player', Amp);
27 Projector := TProjector.Create('Top-O-Line Projector', DVD);
28 Lights := TTheaterLights.Create('Theater Ceiling Lights');
29 Screen := TScreen.Create('Theater Screen');
30 Popper := TPopcornPopper.Create('Popcorn Popper');
31
32 HomeTheater := THomeTheaterFacade.Create(Amp, Tuner, DVD, CD, Projector,
33 Lights, Screen, Popper);
34
35 HomeTheater.WatchMovie('Raiders of the Lost Ark');
36 Writeln;
37 HomeTheater.EndMovie;
38
39 FreeAndNil(Amp);
40 FreeAndNil(Tuner);
41 FreeAndNil(DVD);
42 FreeAndNil(CD);
43 FreeAndNil(Projector);
44 FreeAndNil(Lights);
45 FreeAndNil(Screen);
46 FreeAndNil(Popper);
47 FreeAndNil(HomeTheater);
48
49 Readln;
50end.
1program pHomeTheaterTestDrive;
2
3{$APPTYPE CONSOLE}
4
5uses
6 SysUtils,
7 uFacadeObject in 'uFacadeObject.pas',
8 uSubObject in 'uSubObject.pas';
9
10var
11 Amp : TAmplifier;
12 Tuner : TTuner;
13 DVD : TDVDPlayer;
14 CD : TCDPlayer;
15 Projector: TProjector;
16 Lights: TTheaterLights;
17 Screen: TScreen;
18 Popper: TPopcornPopper;
19
20 HomeTheater: THomeTheaterFacade;
21
22begin
23 Amp := TAmplifier.Create('Top-O-Line Amplifier');
24 Tuner := TTuner.Create('Top-O-Line AM/FM Tuner', Amp);
25 DVD := TDVDPlayer.Create('Top-O-Line DVD Player', Amp);
26 CD := TCDPlayer.Create('Top-O-Line CD Player', Amp);
27 Projector := TProjector.Create('Top-O-Line Projector', DVD);
28 Lights := TTheaterLights.Create('Theater Ceiling Lights');
29 Screen := TScreen.Create('Theater Screen');
30 Popper := TPopcornPopper.Create('Popcorn Popper');
31
32 HomeTheater := THomeTheaterFacade.Create(Amp, Tuner, DVD, CD, Projector,
33 Lights, Screen, Popper);
34
35 HomeTheater.WatchMovie('Raiders of the Lost Ark');
36 Writeln;
37 HomeTheater.EndMovie;
38
39 FreeAndNil(Amp);
40 FreeAndNil(Tuner);
41 FreeAndNil(DVD);
42 FreeAndNil(CD);
43 FreeAndNil(Projector);
44 FreeAndNil(Lights);
45 FreeAndNil(Screen);
46 FreeAndNil(Popper);
47 FreeAndNil(HomeTheater);
48
49 Readln;
50end.
运行结果: