Delphi 设计模式：《HeadFirst设计模式》Delphi7代码
1. 命令的接受者
unit uReceiveObject;
interface
type
TLight = class(TObject)
public
procedure Open;
procedure Off;
end;
TGarageDoor = class(TObject)
public
procedure Up;
procedure Down;
procedure Stop;
procedure LightOn;
procedure LightOff;
end;
implementation
{ TLight }
procedure TLight.Off;
begin
Writeln('');
end;
procedure TLight.Open;
begin
Writeln('Light is On.');
end;
{ TGarageDoor }
procedure TGarageDoor.Down;
begin
Writeln('');
end;
procedure TGarageDoor.LightOff;
begin
Writeln('');
end;
procedure TGarageDoor.LightOn;
begin
Writeln('');
end;
procedure TGarageDoor.Stop;
begin
Writeln('');
end;
procedure TGarageDoor.Up;
begin
Writeln('GarageDoor is Open.');
end;
end.
2.命令对象
unit uCommandObject;
interface
uses
uReceiveObject;
type
TCommand = class(TObject)
public
procedure Execute; virtual; abstract;
end;
TLightOnCommand = class(TCommand)
private
FLight: TLight;
public
constructor Create(aLight: TLight);
procedure Execute; override;
end;
TGarageDoorOpenCommand = class(Tcommand)
private
FGarageDoor: TGarageDoor;
public
constructor Create(aGarageDoor: TGarageDoor);
procedure Execute; override;
end;
implementation
{ TLightOnCommand }
constructor TLightOnCommand.Create(aLight: TLight);
begin
FLight := aLight;
end;
procedure TLightOnCommand.Execute;
begin
FLight.Open;
end;
{ TGarageDoorOpenCommand }
constructor TGarageDoorOpenCommand.Create(aGarageDoor: TGarageDoor);
begin
FGarageDoor := aGarageDoor;
end;
procedure TGarageDoorOpenCommand.Execute;
begin
FGarageDoor.Up;
end;
end.
3.命令的请求者即发出者
unit uSimpleRemoteControl;
interface
uses
uCommandObject;
type
TSimpleRemoteControl = class(TObject)
private
FSlot: TCommand;
public
procedure SetCommand(aCommand: TCommand);
procedure ButtonWasPressed;
end;
implementation
相关文档：
图像的中值滤波，就是在以某一像素为中心的n阶像素矩阵中，找出R、G、B各分量的中间值来分别替代该像素的RGB值，从而达到对图像噪声滤波的目的。这里的中间值并非像素矩阵R、G、B各分量的的算术平均值，而是像素矩阵R、G、B各分量排序后的中位数值。
下面是Delphi图像中值滤波的实� ......
本文的线性亮度/对比度调整方法是在《改进的图像线性亮度调整方法》一文中线性亮度调整方法与《Delphi图像处理 -- Photoshop图像亮度/对比度调整》中的对比度调整方法基础上形成的，其原理和特点可参见这2篇文章：
过程定义：
// 线性调整亮度，Value亮度值
procedure ImageL ......
//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：'+ ......
模板方法模式定义了一个算法骨架，允许子类对算法的某个或某些步骤进行重写（override)。
1.CoffeineBeverageWithHook
{《HeadFirst设计模式》之模板方法模式 }
{ 编译工具: Delphi7.0 }
{ E-Mail : xshlife@163.com }
unit uCoffeineBeverageWithHook;
interface
uses
SysUti ......
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
......
