Delphi 设计模式：《HeadFirst设计模式》Delphi7代码
没有应用状态模式的代码
1. 工程文件
program Project1;
{$APPTYPE CONSOLE}
uses
uGumballMachine in 'uGumballMachine.pas';
var
aGumballMachine: TGumballMachine;
begin
aGumballMachine := TGumballMachine.Create(5);
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
Writeln;
aGumballMachine.InsertQuarter;
aGumballMachine.EjectQuarter;
aGumballMachine.TurnCrank;
Writeln;
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
aGumballMachine.EjectQuarter;
Writeln;
aGumballMachine.InsertQuarter;
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
aGumballMachine.InsertQuarter;
aGumballMachine.TurnCrank;
aGumballMachine.Free;
Readln;
end.
2.单元文件
unit uGumballMachine;
interface
type
TGumballMachine = class(TObject)
private
FState: Integer;
FCount: Integer;
public
constructor Create(aCount: Integer);
procedure InsertQuarter;
procedure EjectQuarter;
procedure TurnCrank;
procedure Dispense;
end;
implementation
const
SOLD_OUT = 0;
NO_QUARTER = 1;
HAS_QUARTER = 2;
SOLD = 3;
{ TGumballMachine }
constructor TGumballMachine.Create(aCount: Integer);
begin
FCount := aCount;
FState := SOLD_OUT;
if FCount > 0 then
FState := NO_QUARTER;
end;
procedure TGumballMachine.Dispense;
begin
if FState = SOLD then
begin
Writeln('A gumball comes rolling out the slot');
FCount := FCount - 1;
if FCount = 0 then
begin
Writeln('Oops, out of Gumballs');
FState := SOLD_OUT;
end
else
FState := NO_QUARTER;
end;
if FState = NO_QUARTER then
Writeln('You need to pay first');
if FState = SOLD_OUT then
Writeln('No gumball dispensed');
if FState = HAS_QUARTER then
Writeln('No gumball dispensed');
end;
procedure TGumballMa
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//定义MyClass
TMyClass = class
GUID: string;
Name: string;
bSex: Boolean;
Tel : string;
end;
//取值
var
obj: TMyClass;
begin
obj := TMyClass.Create;
with Memo1.Lines do
begin
Add('对象大小:' + IntToStr(obj.InstanceSize));
Add('对象所在地址：'+ ......
1.被装饰者
{《HeadFirst设计模式》之装饰模式 }
{ 本单元中的类为被装饰者 }
{ 编译工具: Delphi7.0 }
{ E-Mail : xshlife@163.com }
unit uComponent;
interface
type
TBeverage = class(TObject) //抽象饮料类
protected
FDescription: String;
public
......
1. 命令的接收者
{《HeadFirst设计模式》之命令模式 }
{ 本单元中的类为命令的接收者 }
{ 编译工具 ：Delphi7.0 }
{ 联系方式 ：xshlife@163.com }
unit uReceiveObject;
interface
type
TLight = class(TObject)
private
FLocation: String;
public
constru ......
