我需要了解使组件生成和管理子组件的基础知识。我最初通过创建一个 来尝试这个TCollection，并尝试在每个TCollectionItem. 但我知道这并不像我希望的那么容易。
所以现在我要从头开始这个项目，这次我想把它做好。这些子组件不是可视组件，不应该有任何显示或窗口，只是基于TComponent. 包含这些子组件的主要组件也将基于TComponent. 所以这里没有任何东西是可视的，我不想在我的表单上（在设计时）为每个子组件添加一个小图标。
我希望能够以类似集合的方式维护和管理这些子组件。重要的是这些子组件应该被创建、命名并添加到表单源中，就像菜单项一样。这首先是这个想法的全部要点，如果它们不能被命名，那么这整个想法就是 kaput。
哦，还有一件重要的事情：作为所有子组件的父组件的主组件需要能够将这些子组件保存到 DFM 文件中。
例子：
而不是访问这些子项目之一，例如：
MyForm.MyItems[1].DoSomething();
相反，我想做类似的事情：
MyForm.MyItem2.DoSomething();
所以我不必依赖于知道每个子项的 ID。
编辑：
我觉得有必要包含我的原始代码，以便可以看到原始集合是如何工作的。这只是从整个单元中剥离的服务器端收集和收集项目：
// Command Collections
// Goal: Allow entering pre-set commands with unique Name and ID
// Each command has its own event which is triggered when command is received
// TODO: Name each collection item as a named component in owner form
//Determines how commands are displayed in collection editor in design-time
TJDCmdDisplay = (cdName, cdID, cdCaption, cdIDName, cdIDCaption);
TJDScktSvrCmdEvent = procedure(Sender: TObject; Socket: TJDServerClientSocket;
const Data: TStrings) of object;
TSvrCommands = class(TCollection)
private
fOwner: TPersistent;
fOnUnknownCommand: TJDScktSvrCmdEvent;
fDisplay: TJDCmdDisplay;
function GetItem(Index: Integer): TSvrCommand;
procedure SetItem(Index: Integer; Value: TSvrCommand);
procedure SetDisplay(const Value: TJDCmdDisplay);
protected
function GetOwner: TPersistent; override;
public
constructor Create(AOwner: TPersistent);
destructor Destroy;
procedure DoCommand(const Socket: TJDServerClientSocket;
const Cmd: Integer; const Data: TStrings);
function Add: TSvrCommand;
property Items[Index: Integer]: TSvrCommand read GetItem write SetItem;
published
property Display: TJDCmdDisplay read fDisplay write SetDisplay;
property OnUnknownCommand: TJDScktSvrCmdEvent
read fOnUnknownCommand write fOnUnknownCommand;
end;
TSvrCommand = class(TCollectionItem)
private
fID: Integer;
fOnCommand: TJDScktSvrCmdEvent;
fName: String;
fParamCount: Integer;
fCollection: TSvrCommands;
fCaption: String;
procedure SetID(Value: Integer);
procedure SetName(Value: String);
procedure SetCaption(const Value: String);
protected
function GetDisplayName: String; override;
public
procedure Assign(Source: TPersistent); override;
constructor Create(Collection: TCollection); override;
destructor Destroy; override;
published
property ID: Integer read fID write SetID;
property Name: String read fName write SetName;
property Caption: String read fCaption write SetCaption;
property ParamCount: Integer read fParamCount write fParamCount;
property OnCommand: TJDScktSvrCmdEvent read fOnCommand write fOnCommand;
end;
////////////////////////////////////////////////////////////////////////////////
implementation
////////////////////////////////////////////////////////////////////////////////
{ TSvrCommands }
function TSvrCommands.Add: TSvrCommand;
begin
Result:= inherited Add as TSvrCommand;
end;
constructor TSvrCommands.Create(AOwner: TPersistent);
begin
inherited Create(TSvrCommand);
Self.fOwner:= AOwner;
end;
destructor TSvrCommands.Destroy;
begin
inherited Destroy;
end;
procedure TSvrCommands.DoCommand(const Socket: TJDServerClientSocket;
const Cmd: Integer; const Data: TStrings);
var
X: Integer;
C: TSvrCommand;
F: Bool;
begin
F:= False;
for X:= 0 to Self.Count - 1 do begin
C:= GetItem(X);
if C.ID = Cmd then begin
F:= True;
try
if assigned(C.fOnCommand) then
C.fOnCommand(Self, Socket, Data);
except
on e: exception do begin
raise Exception.Create(
'Failed to execute command '+IntToStr(Cmd)+': '+#10+e.Message);
end;
end;
Break;
end;
end;
if not F then begin
//Command not found
end;
end;
function TSvrCommands.GetItem(Index: Integer): TSvrCommand;
begin
Result:= TSvrCommand(inherited GetItem(Index));
end;
function TSvrCommands.GetOwner: TPersistent;
begin
Result:= fOwner;
end;
procedure TSvrCommands.SetDisplay(const Value: TJDCmdDisplay);
begin
fDisplay := Value;
end;
procedure TSvrCommands.SetItem(Index: Integer; Value: TSvrCommand);
begin
inherited SetItem(Index, Value);
end;
{ TSvrCommand }
procedure TSvrCommand.Assign(Source: TPersistent);
begin
inherited;
end;
constructor TSvrCommand.Create(Collection: TCollection);
begin
inherited Create(Collection);
fCollection:= TSvrCommands(Collection);
end;
destructor TSvrCommand.Destroy;
begin
inherited Destroy;
end;
function TSvrCommand.GetDisplayName: String;
begin
case Self.fCollection.fDisplay of
cdName: begin
Result:= fName;
end;
cdID: begin
Result:= '['+IntToStr(fID)+']';
end;
cdCaption: begin
Result:= fCaption;
end;
cdIDName: begin
Result:= '['+IntToStr(fID)+'] '+fName;
end;
cdIDCaption: begin
Result:= '['+IntToStr(fID)+'] '+fCaption;
end;
end;
end;
procedure TSvrCommand.SetCaption(const Value: String);
begin
fCaption := Value;
end;
procedure TSvrCommand.SetID(Value: Integer);
begin
fID:= Value;
end;
procedure TSvrCommand.SetName(Value: String);
begin
fName:= Value;
end;